Strategic government planning will be crucial in addressing the ongoing supply/demand imbalance in Brisbane’s residential market, as new supply continues to lag.

That’s one of the conclusions from a new CBRE market analysis, which highlights positive fundamentals but ongoing challenges for both the Brisbane and broader South East Queensland residential market.

[smartcode_project:default project_id=136432 project_image_fid=5479]

While 5,600 apartments and townhouses are projected to be completed in Brisbane this year – up from an average of 3,500 in the five years to 2024 – CBRE Research Director Craig Godber said this figure had been somewhat inflated by project delays, which had shifted some anticipated 2024 completions into 2025.

Godber noted that recent completion levels were also well below the peak period in 2016 and 2017 when annual additions averaged around 12,500 units and townhouses.

“Brisbane's residential market is experiencing unprecedented growth, with demand outstripping supply," Godber said.

"Strategic planning by the State Government is crucial in addressing this imbalance and ensuring sustainable development."

Godber noted that low supply levels had translated into an extended period of low vacancy rates, with Brisbane’s metropolitan vacancy being at or below 1.5% since early 2021 and hitting 0.9% as at March this year.

These tight market conditions are evident across all city precincts.

[smartcode_project:default project_id=149098 project_image_fid=330588]

Looking ahead, adjusted additions between 2025 and 2029 are forecast at 23,200 dwellings, or 4,600 per annum, with 60% of these expected to be concentrated in Brisbane’s inner city.

“Brisbane’s low vacancy rate highlights the urgent need for additional residential supply and the forecasted growth in dwelling completions is a positive step towards meeting this demand,” Godber said.

[smartcode_project:default project_id=7574 project_image_fid=3770]

CBRE Metropolitan Investments Director Will Carman said Brisbane’s population expansion and strong demand fundamentals were driving interest in city development sites, but he noted that developer attitudes were shifting.

“As construction pricing continues to climb, developers are becoming more discerning. The focus has shifted toward delivering high-quality, well-located residential communities that can withstand market pressures and meet long-term demand,” Carman said.

He also noted the issue of affordability, with Brisbane’s median house price having crossed the $1 million mark.

“This reflects not only the city’s strong fundamentals and sustained demand, but also the growing challenge of affordability - particularly for first-home buyers. This price growth underscores the importance of strategic planning and quality development to meet evolving market expectations,” Carman said.

Developer focus shifts to high-quality, well-located residential communities that can withstand market pressures and meet long-term demand, new CBRE analysis shows

Joel Robinson

Challenges and opportunities in Brisbane’s residential market as supply lags

Not only is growth in Brisbane’s unit market lasting longer, it’s also getting stronger.

In August, unit values climbed a further 1.3 per cent, one of the strongest monthly results the Queensland capital has recorded in 2025, pushing the median unit value beyond $740,000, according to Cotality’s latest Home Value Index.

Over the rolling quarter, unit values surged 3.9 per cent, and are now 11.1 per cent higher year-to-date,&nbsp;making Brisbane the strongest-performing capital city unit market in the country.

The city’s apartment sector is also comfortably outpacing detached housing in 2025. House values rose 1.2 per cent in August to reach a median of $1.04 million, but quarterly growth was softer at 2.9 per cent, with an annual gain of just 7.3 per cent.

This widening divergence highlights the relative affordability of apartments and the intensifying demand for medium-density housing amid constrained supply,&nbsp;a trend reshaping Brisbane’s property market.

&nbsp;

<h2>What happened in Brisbane’s off the plan apartment market in August?</h2>

It was a busy month in Brisbane's off the plan property market, with new projects coming to the market, new projects and approved, and some hitting major construction milestones.

&nbsp;

Gold Coast developer <a href="https://www.apartments.com.au/developers/sherpa-property-group">Sherpa Property Group</a> revealed its debut Brisbane apartment development to the market, starting to take expressions of interest for&nbsp;<a href="https://www.apartments.com.au/new-apartments/symphony-south-brisbane-21-23-cordelia-street-south-brisbane-qld-4101">Symphony</a>&nbsp;in South Brisbane.&nbsp;

The 138-apartment development, part of Sherpa’s affordability-focused Flourish brand, is located near Fish Lane and aims to deliver quality homes at more accessible price points.&nbsp;

[smartcode_project:default project_id=7574 project_image_fid=3444]

Symphony’s one-, two-, and three-bedroom apartments will start from $655,000, with eligible first-home buyers benefiting from Queensland’s new stamp duty exemptions.&nbsp;

Over 1,400 sqm of communal amenity, including workspaces, rooftop pool, wellness centre, and private dining, will support a lifestyle-driven community.&nbsp;

Read more: <a href="https://www.apartments.com.au/news/qld/sherpa-opens-pre-release-for-debut-brisbane-apartment-development-symphony">Sherpa opens pre-release for debut Brisbane apartment development, Symphony</a>

Two new project launches in the same month is something Brisbane hasn’t seen in years. Joining Symphony at launch was <a href="https://www.apartments.com.au/new-apartments/banksii-east-brisbane-169-wellington-road-east-brisbane-qld-4169">BANKSII</a>, a 72-apartment development rising opposite Raymond Park in East Brisbane

To be developed by joint venture partners <a href="https://www.apartments.com.au/developers/core-property-partners">Core Property Partners</a> and <a href="https://www.apartments.com.au/developers/vector-property">Vector Property</a>, BANKSII has been designed by&nbsp;<a href="https://www.apartments.com.au/architects/mas-architecture-studio">MAS Architecture</a>&nbsp;to reinterpret and integrate the flow of the&nbsp;native Banksia flower into the architecture.

The rooftop will include a suite of wellness amenities including a pool, sauna, gym, and alfresco spaces.&nbsp;

[smartcode_project:default project_id=136432 project_image_fid=5476]

&nbsp;

With the Kangaroo Point Green Bridge, The Gabba, and Cross River Rail all within walking distance, BANKSII is poised to benefit from Olympic precinct investment in the lead-up to 2032.

Read more: <a href="https://www.apartments.com.au/news/qld/banksii-sales-launch-in-booming-east-brisbane-apartment-market">BANKSII sales launch in booming East Brisbane apartment market</a>

August saw major construction milestones achieved both in and out of the city.

<a href="https://www.apartments.com.au/developers/sekisui-house-australia" target="">Sekisui House</a>&nbsp;celebrated the completion of the Uno building at West Village, unveiling its largest apartments, up to 347 sqm internally, as part of <a href="https://www.apartments.com.au/new-apartments/the-allere-collection-west-village-mollison-street-west-end" target="">The Allere Collection</a>.&nbsp;

[smartcode_project:default project_id=114215 project_image_fid=5698]

Positioned in one of Brisbane’s most mature masterplanned precincts, the new residences target the undersupplied upper end of the market, offering rooftop gardens, pools, and pet-friendly amenities like the Paw Pavilion.&nbsp;

The Uno tower follows strong interest in its sold-out sister building Duo, due for completion in late 2025.

Read more: <a href="https://www.apartments.com.au/news/qld/sekisui-house-unveils-allere-unos-largest-apartments-as-building-completes">Sekisui House unveils Allere Uno's largest apartments as building completes</a>

At <a href="https://www.apartments.com.au/developments/rochedale-qld-4123">Rochedale</a> in Brisbane’s south, <a href="https://www.apartments.com.au/developers/metro-property-group">Metro Property Group</a> also marked a key construction milestone at Citrine Townhomes, with stage one now in the defects phase and full completion of all building works.&nbsp;

Stages one and two are fully sold out, while the recently launched stage three has just 10 four-bedroom homes remaining, priced from $1.125 million.&nbsp;

[smartcode_project:default project_id=136295 project_image_fid=2663]

Across the three stages, <a href="https://www.apartments.com.au/new-townhouses/citrine-townhomes-rochedale-311-gardner-road-rochedale-qld-4123">Citrine Townhomes</a> will deliver 90 three and four-bedroom homes with landscaped resident amenities, including a pool and BBQ area.&nbsp;

Settlements for stage one are expected to commence from October 2025.

Read more: <a href="https://www.apartments.com.au/news/qld/first-stage-of-townhouses-at-citrine-rochedale-reaches-completion-milestone">First stage of townhouses at Citrine Rochedale reaches completion milestone</a>

Builder-developer <a href="https://www.apartments.com.au/developers/mcnab-developments">McNab</a> is expected to launch its new West End project after receiving development approval from the Brisbane City Council in August.

The new development,&nbsp;<a href="https://www.urban.com.au/new-apartments/tannery-residences-439-montague-road-west-end-qld-4101">The Tannery Residences</a>, will see the historic Dixon's Tannery reimagined into a 10-level apartment building that will&nbsp;integrate the original 19th-century building into a resident wellness hub dubbed The Retreat, featuring a sauna, plunge pools, gym, Pilates studio, and co-working areas.&nbsp;

<img alt="McNab secures approval to transform West End's Dixon’s Tannery into The Tannery Residences" data-entity-type="" data-entity-uuid="" src="https://res.cloudinary.com/dz9xllyip/image/fetch/f_auto,c_limit,w_1440,q_auto/https://s3.ap-southeast-2.amazonaws.com/www.urban.com.au/s3fs-public/field/image/McNab%20The%20Tannery_Render_09.jpg?VersionId=Ucpd19J0ABOpzetZ.BsyYmS_x2N2QV_g" />

The 81 residences, ranging from two to four bedrooms, will be complemented by expansive rooftop amenities, including a pool, dog-friendly zones, and outdoor dining.&nbsp;

McNab plans to begin construction in Q3 2025, with completion expected by late 2027.

Read more: <a href="https://www.apartments.com.au/news/qld/mcnab-secures-approval-to-transform-west-ends-dixon-s-tannery-into-the-tannery-residences">McNab secures approval to transform West End's Dixon’s Tannery into The Tannery Residences</a>

&nbsp;

One of the largest applications the local council has seen in years hit the new apartment pipeline in August.

Verso Development filed plans for Toowong Central, a $1 billion precinct across three towers delivering 1,100 apartments to Brisbane’s undersupplied inner-west.&nbsp;

&nbsp;

&nbsp;

<img alt="$1 billion Toowong Central to deliver 1,100 apartments to undersupplied Brisbane market" data-entity-type="" data-entity-uuid="" src="https://res.cloudinary.com/dz9xllyip/image/fetch/f_auto,c_limit,w_1440,q_auto/https://s3.ap-southeast-2.amazonaws.com/www.urban.com.au/s3fs-public/field/image/architecture.png?VersionId=G7zTAAtY9Nj3muYKNSFxD_dzEWMqRn3X" />

Designed by <a href="https://www.apartments.com.au/architects/kerry-hill-architects">KHA</a>, the scheme includes short-term accommodation and a civic plaza, and aims to reclaim <a href="Toowong">Toowong</a>’s identity with subtropical urbanism and integrated public realm outcomes.

Read more: <a href="https://www.apartments.com.au/news/qld/1-billion-toowong-central-to-deliver-1-100-apartments-to-undersupplied-brisbane-market">$1 billion Toowong Central to deliver 1,100 apartments to undersupplied Brisbane market</a>

City Beat August 2025: Brisbane unit values surge again in August, as two new apartment developments launch to market

Summit &amp; Ridge, the fourth stage of Sekisui House Australia's Sanctuary in Wentworth Point, secured a flurry of sales at its recent launch.

More than 80 per cent of purchasers of&nbsp;<a href="https://www.apartments.com.au/new-apartments/summit-ridge-at-sanctuary-wentworth-point-14-16-hill-road-wentworth-point-nsw-2127">Summit &amp; Ridge</a>&nbsp;were owner occupiers, underlining the strong demand from buyers looking to live within the new&nbsp;riverfront community. Over 40 apartments were sold valued at $46.5 million within three hours of the launch event, with an average price of $1.107 million.

“Buyers appreciated the larger layouts in this stage and the sense of space Summit &amp; Ridge offers,"&nbsp;said Matthew Landa, Senior Sales Executive – Apartments &amp; Mixed-Use Developments.

"The combination of generous apartments, exclusive amenities and unique position on the Parramatta River peninsula helped with sales. Many told us they could picture themselves living here, it is a place that feels established, green and connected, yet private."

The launch drew interest from local buyers within a 5km radius, as well as repeat purchasers from previous Sanctuary stages, with 15 per cent of buyers upgrading their property portfolio through Sekisui House Australia’s Rewards Program. Purchasers also came from the Lower North Shore, Oatlands and the Inner West, highlighting the project’s broad market appeal.&nbsp;

<img alt="Summit &amp; Ridge at Sanctuary, Wentworth Point" data-entity-type="file" data-entity-uuid="1166d1aa-e075-429c-a1f4-4861cad140e3" src="https://s3.ap-southeast-2.amazonaws.com/www.urban.com.au/s3fs-public/inline-images/2417_TheSanctuary_02_EXT_Podium.jpg?VersionId=E37Ym7TBhQX4VFKnFNDwccSiDLp81KZA" />

Comprising 488 apartments across Summt (39 levels), and Ride (32 levels), the first sales release focused exclusively on one and two-bedroom residences, priced from $720,000 to $1.3 million. One-bedroom apartments were popular, with purchasers valuing their limited supply, pricing and uninterrupted views across the Newington Nature Reserve, Parramatta River and picturesque views across the Blue Mountains.

Summit &amp; Ridge enjoys an enviable position on the <a href="https://www.apartments.com.au/developments/wentworth-point-nsw-2127">Wentworth Point</a> peninsula, the only built environment north of Hill Road, surrounded by water and a nature reserve. The project’s Neighbourhood Green, a 1.5-hectare landscaped parkland running through the heart of Sanctuary will also open soon.

The towers by acclaimed architects <a href="https://www.apartments.com.au/architects/turner-studio">TURNER</a> are defined by organic, sculptural forms that frame views, guide movement and enhance the connection between nature and the city, a design approach that ensures Summit &amp; Ridge will become a striking architectural marker within Sydney’s skyline.

<img alt="Summit &amp; Ridge at Sanctuary, Wentworth Point" data-entity-type="file" data-entity-uuid="49e681c8-af8e-4623-aa60-7573acaade7e" src="https://s3.ap-southeast-2.amazonaws.com/www.urban.com.au/s3fs-public/inline-images/CGI1.png?VersionId=EkqjP9veHDeZaSeXkN8p1aOUW79nLdVv" />

Summit will feature resident-only amenities on level 29 including a resort-style pool and sauna, while Ridge offers an outdoor cinema, sunset bar and dining space on level 23. At the base of Ridge, a 110-place childcare centre will further support growing families, reinforcing the masterplan’s focus on lifestyle and community.

The interiors in the project by <a href="https://www.apartments.com.au/interior-designers/henderson-co">Henderson &amp; Co.</a>, were inspired by the “natural elegance” of Sanctuary’s landscape setting, with efficient Japanese design principles enhancing space and light throughout the homes. 
&nbsp; 
“The fact that sales were achieved so quickly shows the strength of demand for quality, well-designed apartments in Sydney,"&nbsp;Landa added.

"Owner occupiers in particular see the long-term value of being part of a master planned community delivered by Sekisui House Australia, and that trust has been a major driver behind this success."

Sales momentum was further supported by the current downward trend in interest rates, creating favourable conditions for buyers.

<img alt="Summit &amp; Ridge at Sanctuary, Wentworth Point" data-entity-type="file" data-entity-uuid="31591500-e65c-44d6-aa48-35310a7bd45b" src="https://s3.ap-southeast-2.amazonaws.com/www.urban.com.au/s3fs-public/inline-images/HERO_CASE%20STUDY%20A_1.jpg?VersionId=DiE.Zk1g8Rfb1fRmMMe_0r6oa55oYsAb" />

The recent completion of the third stage of Sanctuary, Laguna &amp; Glade,&nbsp;has further reinforced purchaser confidence, giving buyers a first-hand view of Sekisui House Australia’s build quality and design execution.

Nearby amenities include Marina Square Shopping Centre, Wentworth Point High School, ferry terminal, train station and the future Parramatta Light Rail.&nbsp;

Three and four-bedroom apartments will be released at future launches. &nbsp;Construction is anticipated to commence in Q4 2025 and completed by Q3 2028.

Every apartment in Summit &amp; Ridge will carry a 4 Gold Star iCIRT rating, an independent NSW Government-backed accreditation for integrity, capability and financial stability, giving buyers confidence they are investing in a home built to last.

[smartcode_project_cta:default project_id=144917]

Owner occupiers drive $46.5 million launch success at Summit & Ridge, Wentworth Point

Plans to transform the former VicRoads site in Kew are progressing with four shortlisted developers invited to submit their proposals for the site.

<a href="https://www.apartments.com.au/developers/riverlee">Riverlee</a>, <a href="https://www.apartments.com.au/developers/lendlease-development">Lendlease Development Pty Ltd</a>, <a href="https://www.apartments.com.au/developers/mirvac">Mirvac Group</a> and a <a href="https://www.apartments.com.au/developers/milieu-property">Milieu</a>-led consortium have been invited to participate in the Request for Proposal (RFP) process to deliver much needed housing at 60 Denmark Street, Kew.

Acting Executive General Manager Housing, Nemesia Kennett, said the RFP stage follows a strong response to the initial Expression of Interest (EOI) campaign.

"Denmark Street, Kew, presents a unique development opportunity which has attracted high caliber developers well qualified to transform the site,"&nbsp;Kennett said.

“Each shortlisted developer brings a depth of expertise and proven track record in delivering quality housing projects, achieving excellence in design and community outcomes. We’re looking forward to seeing the shortlisted developers' proposals and understanding how they will deliver the best outcomes for the community if successful."

Local views and priorities for the site were captured in a Community Aspirations Report that will guide the next stage of the development process.

"The report found overwhelming community support for redevelopment of the site and recognition of the urgent need for more homes in Kew,"&nbsp;Kennett added.

“Feedback also highlighted opportunities to revitalise public areas, improve walking and cycling connections, create more green open space, and celebrate the site's heritage, including its rail history and Wurundjeri cultural stories.”

Development Victoria will continue to communicate with the Boroondara Council and the local community throughout the transaction process.

A preferred development partner will be confirmed in 2026, following a thorough assessment of proposals.

Developers shortlisted to deliver housing in Kew

Builder-developer ALAND has drawn back the curtain on its first city-focused new apartment development.

The North Sydney development, <a href="https://www.apartments.com.au/new-apartments/the-walden-north-sydney-173-179-walker-street-north-sydney-nsw-2060">The Walden</a>, is the first time the company has ventured this close to the city, having previously completed thousands of apartments predominantly in Sydney's west, and more recently in Gosford.

<a href="https://www.apartments.com.au/developers/aland">ALAND</a> acquired the prime North Sydney site, spanning Walker and Hampden Streets just down the road from the Victoria Cross Metro station, for $240 million in June.

Now they've unveiled the new project, a mix of one-, two-, three- and four-bedroom apartments across a 30-level building designed by Rothelowman.

[smartcode_project:default project_id=134323 project_image_fid=6384]

The Walden will capitalise on the site’s front-row position on the eastern fringe of the <a href="https://www.apartments.com.au/developments/north-sydney-nsw-2060">North Sydney</a> CBD, which offers uninterrupted Sydney Harbour views stretching from the Sydney Harbour Bridge all the way to Sydney Heads.

The main tower will be flanked by a small four-level amenity building known as The Pavilion, offering exclusive resident-only amenities including a dedicated concierge service, a sauna and private wellness studio, a gymnasium and fitness studio, a resort-style rooftop pool and sundeck.

There will also be a&nbsp;residents’ lounge, private dining and a wine cellar, and co-working facilities with an on-site meeting room and boardroom.

&nbsp;

&nbsp;

[smartcode_project:default project_id=134323 project_image_fid=6382]

ALAND Founder Andrew Hrsto said the company knew they could create something "iconic" with The Walden when they saw the site.

&nbsp;

“As a company, we had been searching for a site in one of Sydney’s blue-chip locations, spanning the Eastern Suburbs, the Sydney CBD and the North Shore, and when we had the opportunity to purchase this site, we immediately recognised that it could be something iconic – being the last development with a view offering this exceptional.

“We identified the attributes and quality of the site as being perfectly aligned for ALAND – and we feel that this off-market acquisition is a perfect opportunity to showcase our craftmanship and expertise through a truly unique offering."

[smartcode_project:default project_id=134323 project_image_fid=6399]

Hrsto pointed to ALAND’s longstanding development expertise as a significant benefit in delivering a positive outcome for The Walden.

“Being a fully integrated development and construction business with a highly experienced team, we have the benefit of in-house experts across the development spectrum, from acquisitions, design, planning, and construction, to sales, marketing, property management, through to building management.

“As one of Australia’s largest private development and construction groups, we’ve been in operation for 23 years, with a Gold Star iCIRT rating and a 100 per cent delivery success rate across numerous masterplanned and mixed-use projects – and we’re very much looking forward to bringing this expertise to The Walden and contributing to the ongoing revitalisation of North Sydney."

The Walden is the latest development in Sydney to have the 10-year Latent Defects Insurance policy by Resilience Insurance, protecting buyers from any structural or waterproofing-related issues for 10 years post-completion.&nbsp;

Demolition of existing structures on The Walden site has already commenced through specialist civil contractor Moits, with the aim of completing preparatory ground works by the end of 2025, ahead of construction commencement in early 2026.

[smartcode_project_cta:default project_id=134323]

ALAND unveils The Walden, North Sydney's latest luxury apartment development

Flood Risk

<html><body>
GUEST OBSERVATION
A flood-ravaged Townsville has captured public attention, highlighting the vulnerability of many of our cities to flooding. The <a href="https://www.propertyobserver.com.au/https://www.abc.net.au/news/2019-02-15/queensland-floods-special-climate-statement/10816184" target="_blank">extraordinary amount of rain</a> is just one aspect of the disaster in Queensland’s third-biggest city. The flooding, increasing urban density, the management of the Ross River Dam, and the difficulties of dealing with byzantine insurance regulations have left the community with many questions about their future.
These questions won’t be resolved until we enhance the resilience of cities and communities against flooding. Adaptation needs to become an integral part of living with the extremes of the Australian environment. I discuss how to design and create resilient urban landscapes later in this article.
Flood risk and insurance
Another issue that affects many households and businesses is the relationship between insurance claims and <a href="https://www.propertyobserver.com.au/https://www.preventionweb.net/news/view/63766" target="_blank">1-in-100-year flood event overlay maps</a>. Projected rises in flood risks under climate change have led to <a href="https://www.theguardian.com/australia-news/2019/feb/20/townsville-homes-may-become-uninsurable-due-to-flooding-from-climate-change" target="_blank">concerns that parts of Townsville and other cities will become “uninsurable”</a> should the costs of cover become prohibitive for property owners.
Council flood data <a href="https://www.propertyobserver.com.au/https://www.preventionweb.net/news/view/63766" target="_blank">used for urban planning and land-use strategies</a> is also used by insurers to assess the flood risk to individual properties. Insurers then price the risk accordingly.
However, in extraordinary circumstances, when the flooded land is actually larger than the area marked by the flood overlay map, complications emerge. In fact, that part of the community living outside the map’s boundaries is considered flood-free. Thus, those pockets of the community may have chosen not to have flood insurance and not have emergency plans, which leaves them even worse off after floods. This is happening in Townsville.
Yet this is nothing new. Many people experienced very similar circumstances in 2011. Flood waters covered as much land as Germany and France combined. Several communities were left on their knees.
Notwithstanding the prompt and vast response of the federal government and Queensland’s state authorities, a few years later Townsville is going through something alarmingly similar.
Adaptation to create resilient cities
To find a solution, we need to rethink how to implement the <a href="https://www.disaster.qld.gov.au/dmg/Prevention/Pages/3-5.aspx" target="_blank">Queensland Emergency Risk Management Framework</a>. That is no easy task. However, it starts with shifting the perspective on what is considered a risk – in this case, a flooding event.
Floods, per se, are not a natural disaster. Floods are part of the natural context of Queensland as can be seen below, for instance, in the <a href="https://www.qhatlas.com.au/content/channel-country" target="_blank">Channel Country</a>.
<a href="https://images.theconversation.com/files/261144/original/file-20190227-150724-xvwvfx.JPG?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=1000&amp;fit=clip"><img src="https://images.theconversation.com/files/261144/original/file-20190227-150724-xvwvfx.JPG?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" alt=""></a>
Floods are part of the Australian landscape. Here trees mark the seasonal riverbeds in the Queensland outback between Cloncurry and Mount Isa. Cecilia Bischeri, Author provided
The concept of adaptation as a built-in requirement of living in this environment then becomes pivotal. In designing and developing future-ready cities, we must aim to build resilient communities.
This is the ambitious project I am working on. It involves different figures and expertise with a shared vision and the support of government administrations that are willing to invest in a future beyond their elected term of office.
Ideas for Gold Coast Resilientscape
I live and work in the City of Gold Coast. Water is a fundamental part of the city’s character and beauty. In addition to the ocean, a complex system of waterways shapes a unique urban environment. However, this also exposes the city to a series of challenges, including flooding.
Last September, <a href="https://www.gchaveyoursay.com.au/industryhub/news_feed/updated-flood-overlay-maps" target="_blank">an updated flood overlay map</a> was made available to the community. The map takes into account the projections of a 0.8 metre increase in the sea level and 10% increases in storm tide intensity and rainfall intensity.
These factors are reflected in the 1-in-100-year flood overlay. It shows undoubtedly that the boundaries between land and water are changeable.
Building walls between the city and water as the primary flood protection strategy is not a solution. A rigid border can actually intensify the catastrophe. New Orleans and the <a href="https://soundwaves.usgs.gov/2006/01/" target="_blank">levee failures</a> during the passage of Hurricane Katrina in 2005 provide a stark illustration of this.
Instead, what would happen and what would our cities look like if we designed green and public infrastructures that embody flooding as part of the natural context of our cities and territory?
The current project, titled RESILIENTSCAPE: A Landscape for Gold Coast Urban Resilience, considers the role of architecture in enhancing the resilience of cities and communities against flooding. The proposal, in a nutshell, explores the possibilities that urban landscape design and implementation provide for resilience.
RESILIENTSCAPE focuses on the Nerang River catchment and the Gold Coast Regional Botanic Gardens, in the suburb of Benowa. The river and gardens were adopted as a case study for a broader strategy that aims to promote architectural solutions for a resilient City of Gold Coast. The project investigates the possibility of using existing green pockets along the Nerang River to store and retain excess water during floods.
<a href="https://images.theconversation.com/files/261354/original/file-20190228-150721-xt0v13.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=1000&amp;fit=clip"><img src="https://images.theconversation.com/files/261354/original/file-20190228-150721-xt0v13.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" alt=""></a>
Gold Coast Regional Botanic Gardens is one of the green areas along the Nerang River that could be used to store and retain flood water. <a class="source" href="https://commons.wikimedia.org/wiki/File:Gold_Coast_Regional_Botanic_Gardens_(08).jpg" target="_blank">Batsv/Wikimedia Commons</a>, <a class="license" href="http://creativecommons.org/licenses/by-sa/4.0/" target="_blank">CC BY-SA</a>
These green spaces, however, will not just serve as “water tanks”. If mindfully planned, the green spaces can double up as public parks and facilities. This would enrich the community’s social realm and maximise their use and return on investment.
The design of a landscape responsive to flooding can, by improving local urban resilience, dramatically change the impact of these events.
The goal of creating urban areas that are adaptive to an impermanent water landscape is the main driver of the project. <a href="https://www.fastcompany.com/3068730/this-new-orleans-neighborhood-is-fighting-flooding-by-welcoming-it" target="_blank">New Orleans</a> after <a href="https://theconversation.com/disappearing-acts-reflecting-on-new-orleans-10-years-after-katrina-46834" target="_blank">Hurricane Katrina</a> and<a href="https://archpaper.com/2017/10/five-years-sandy-nyc-update-flood-resilience-zoning/" target="_blank"> New York</a> after <a href="https://theconversation.com/frankenstorm-sandy-wreaks-havoc-on-nyc-floods-cities-10420" target="_blank">Sandy</a> are <a href="https://www.nisconsortium.org/nisc-activities/neworleansfloodresexp/" target="_blank">investing heavily in this direction</a> and promoting <a href="http://www.rebuildbydesign.org/" target="_blank">international design competitions</a> and community participation to mould a more resilient future. Queensland, what are we waiting for?

Cecilia Bischeri, Lecturer in Architecture, Griffith University
This article is republished from <a href="http://theconversation.com" target="_blank">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/townsville-floods-show-cities-that-dont-adapt-to-risks-face-disaster-112607" target="_blank">original article</a>.
Main photo: Flooded suburbs of Brisbane 
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Townsville floods show cities that don’t adapt to risks face disaster

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Brisbane suburbs affected by the 2011 flood are outperforming the rest of the city, new research shows.
RiskWise Property Research said that of the 20 suburbs affected by floods, 19 (or 95%) have outperformed the rest of the city in terms of housing prices.
The location of these suburbs continues to make them attractive to buyers, says RiskWise CEO Doron Peleg.
“After the 2011 floods the perception among property buyers was these areas would be looked at negatively and prices would fall, or at least deliver very poor capital growth” Peleg said.
“But our research has shown the reality is completely different and the demand for them has eclipsed the negative perception.
“This is because these high-flood areas are truly well located on the river which is in high demand.
“Also, statistically floods like those in 2011 are a once-in-a-50-year event and that makes these homes a risk people are willing to accept.”
<img src="https://res.cloudinary.com/dz9xllyip/image/fetch/c_scale,w_580,q_auto:good/https://s3-ap-southeast-2.amazonaws.com/po.images/2018/5/5/Brisbane%20Flood%20Prone%20Area%20v2.0.jpg" alt="">
Peleg said many of these areas are subject to rezoning which makes them attractive to developers.
He said when considering buying property in a flood area purchasers should do a risk assessment of the suburb, the type of property they want to buy as well as what the risk for the specific property was.
“Also, that's why we have insurance companies. And while they have revised their product offerings and premiums, which no doubt will be quite high, it is still possible to get insurance.”
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Suburbs most affected by Brisbane floods outperforming rest of city

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GUEST OBSERVER
It’s March 2018. A massive storm has hit Sydney’s northern beaches. Luckily no one is hurt, but the floodwaters take days to drain away and the economic impact is serious.
Reporters will tell the story over and over again: how much damage this torrential rain did. But where have we heard that before? Well, the list includes: both Queensland and New South Wales this year, Sydney in 2016, Gold Coast in 2015, Bundaberg in 2013, Queensland in 2012 and Brisbane in 2011.
We are starting to understand we will be hit by ever-increasing storms and floods. The risk is especially high in years when La Nina makes her appearance.
We also know good urban design can reduce the impacts.
Measures to soften the blow
Sydney’s Green Grid is planned to increase the resilience of the city and its residents against flooding and other climate impacts. The grid is designed to connect hydrological and ecological systems or, better, to reconnect these systems to boost their capacity to deal with sudden and severe impacts.
Spaces need to be created in the city for storing water during and directly after a flood. This will stop water from drowning people, flooding houses or destroying public property. These storages can take the form of water squares, temporary storage on ovals or parking areas, basins or gardens on rooftops, and swales along roads.
These measures are well known to be effective and together form an urban sponge system. All we need to do is to create more of these places to increase the capacity to take up water, then release it when safe to do so.
In every city certain areas play a crucial role in increasing, or not decreasing, water-storage capacity. These areas are on the edge of the waterscape and the cityscape. Increasing water storage here prevents bigger problems elsewhere.
What this means for Marrickville
If these places become built-up and can no longer effectively store floodwaters, the impact downstream is disastrous. Carrington Road in Sydney’s Marrickville is a prime example. This inner-city area flooded in 2012, leaving cars floating, houses flooded and people’s belongings lost or ruined.
The analysis and the facts are clear, even neatly mapped out by the New South Wales state government. No misunderstanding there. The safest option is not to build up this area.
<img src="https://images.theconversation.com/files/192763/original/file-20171101-13406-1i4u642.png?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" alt="">
The flood-prone zone in Marrickville. NSW government, 2015
However, if Sydney wants to become a global city, we need to get used to urban environments with higher densities – these have all kinds of advantages. Immediate benefits include better public transport, higher level of amenities and proximity to a dynamic economic environment which generates jobs for the local population. Higher density also prevents occupation of green spaces outside the city and unnecessarily long commuting times for people housed even further away from the city.
This means no densification of existing neighbourhoods is a poor option. However, a proposal to build 20 buildings with 2,600 units in the flood-prone zone in Marrickville has raised eyebrows.
The local council is opposing the “monstrous” scale of the development. The state Labor opposition has joined the battle against this “mega-apartment project”.
But much of the opposition is not for the right reasons. The Inner West Council’s Carrington Road area planning proposal seems to prioritise density over flood risk. When the Cooks River overflows again, as it will, the floods will be even more severe.
Planning should be aiming to create a symbiotic situation, in which a higher-density development and flood mitigation are complementary. The challenge is to marry two seemingly contrasting ambitions: to increase density and yet not increase the vulnerability to floods.
Well-structured density makes all the difference
To achieve this, the first consideration would be to see the area as a flood reservoir where water can temporarily be stored. If this reservoir is then also used to clean rain runoff and grey water from the apartment buildings, it would function as a green space, water treatment and flood remediation space all at once.
What if one large natural wetland could be created, which could capture the water from the Cook River during a flood, but could also clean the rain and grey water from the buildings? The new buildings would not have to suffer from hazards such as flooding because the site design has anticipated the risk.
As an example, imagine a Borneo-Sporenburg type of setting in which the water space surrounds the built-up area. Even with mostly low-rise housing, the development could still reach a high density of around 150 dwellings per hectare.
Applied to Carrington Road, this would imply around 1,200 dwellings can be built in a low-rise setting. Adding two internal superblocks to this development would create another 500 units and only one high-rise building (instead of 20) would then be needed to make it to 2,600 dwellings in the whole development.
The new neighbourhood could form a very sustainable, almost circular system in which waste water, waste heat and waste materials could all be reused for the apartments and dwellings, and in the wetland reservoir. This way the wetland becomes an attractive green space for residents to use. It’s then a green space that not only accommodates the eventual flood, but also regulates the temperature of the urban environment, creating cooler places in summer.
<img src="https://counter.theconversation.com/content/86608/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1">An interesting milieu could emerge here. If the buildings were built on stilts and lifted above the reservoir, wildlife, ecology and water could exist undisturbed under and around the buildings. The result would be a flexible infill development that preserves green and public space, and which is ready for extreme weather or climate conditions.
Rob Roggema, Professor of Sustainable Urban Environments, University of Technology Sydney
This article was originally published on <a href="https://theconversation.com" target="_blank">The Conversation</a>. Read the <a href="https://theconversation.com/higher-density-in-a-flood-zone-heres-a-way-to-do-it-and-reduce-the-risks-86608" target="_blank">original article</a>.
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How to reduce the risks higher density in a flood zone: Rob Roggema

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<div id="lightbox0">GUEST OBSERVER</div>
As Hurricane Harvey made landfall north of Corpus Christi, this Category 4 hurricane left devastation in its wake.
CoreLogic estimates that the total residential insured and uninsured flood loss for Hurricane Harvey is between $25 billion and $37 billion.
In the days before making landfall, the hurricane rapidly intensified, transforming itself from a small tropical storm of little concern, to now, what we consider to be one of the most devastating hurricanes to hit the United States.
Yet, the real characteristic that sets Hurricane Harvey apart from other hurricanes is the unprecedented flooding that resulted, with record setting rainfall reaching upwards of 50 inches in a single location.
Subsequently, the enormous geographic breadth of the flood area is beyond comparison to any recent hurricane or flood event in the U.S. CoreLogic analysis estimates that 70 percent of the flood damage from Hurricane Harvey is uninsured, highlighting an insurance gap that leaves many of those impacted uninsured.  
<a href="https://www.propertyobserver.com.au/images/2017/09/15/Screen%20Shot%202017-09-15%20at%209.01.22%20AM.png" target="_blank">Click to enlarge</a>
<img src="https://www.urban.com.au/images/2017/09/15/Screen%20Shot%202017-09-15%20at%209.01.22%20AM.png" alt="">
Naturally occurring catastrophic events can be tipping-point events, where a failure in one area can quickly cascade into interconnected failures.
We cannot control the timing of low-probability catastrophes (and the rare occurrence of more than one event in a short period, such as Hurricane Irma on the heels of Hurricane Harvey, making landfall in the continental United States) of this severity but can improve our ability to respond, and subsequently rebuild.
Having a comprehensive and granular understanding of risk powered by data and analytics is critical to that. We look to do this through improvements gained largely though the maintenance of better insurance exposure data sets, and the introduction and acceptance of catastrophe risk loss models that can simulate the occurrence of large catastrophic events.
In 1992 when Hurricane Andrew made landfall, it took months for the government and insurance industry to accurately quantify the losses from this event and this delay increased the losses in both financial and human terms. However, in the wake of Hurricane Katrina, the loss severity was rapidly assessed, quickly putting into motion large scale government and private restoration efforts.
In short, as bad as the effects were from Hurricane Katrina, they could have been significantly worse.
The widespread flooding from Hurricane Harvey, caused by storm surge and inland flooding, highlights the challenge of flood risk to properties in the United States.
Since we cannot influence the timing and severity of natural catastrophes, we need to focus on resilience – our collective ability to rebuild and restart businesses and lives.
Insurance is an important part of our resilience because insurance provides the funds necessary to restore the damage to capital from these events. Hurricane risk modeling became accepted after Hurricane Andrew highlighted weaknesses in our ability to respond to large urban catastrophes, and this adoption has led to faster restoration of lives and livelihoods after hurricanes.
Flood risk modeling is a much more complex data and analytic challenge than hurricane risk modeling, but the greater availability of location data sets and grid computing in 2017 have improved our ability to respond to flood disasters.
If we characterize the last phase of risk resilience improvement as the era of catastrophe modeling data and analytics, the next era will be known as the era of big data and grid-computing analytics. And one where we began to actively manage flood risk in the United States.
CoreLogic's Tom Larsen can be contacted <a href="https://www.corelogic.com/default.aspx" target="_blank">here</a>.
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