Environmentally Friendly

Norwest parent developer Mulpha and the University of NSW Built Environment School have released the results of a two-year research study aimed at understanding how the Norwest precinct handles heat and assessing ways to mitigate its impact through smart building, infrastructure and landscape design.

The target of the project is to lower the local Urban Heat Island Effect (UHIE) by two degrees, which will deliver significant cost savings and health benefits to the businesses, residents and visitors to Norwest.

Urban Heat islands form as vegetation is replaced by asphalt and concrete for roads, buildings, and other structures necessary to accommodate growing populations. These surfaces absorb and re-radiate the sun’s heat, causing surface temperatures and overall ambient temperatures to rise.

Mulpha has adopted an urban heat response to minimise heat build-up in its Norwest developments, including its zero-carbon development Norwest Quarter.&nbsp;

Head of Developments, Tim Spencer said the design considerations adopted at an early-stage in any development will have a major impact on the climate variability and liveability in urban environments such as Norwest.

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“We are excited to be collaborating with some of the leading thinkers and bright young minds of UNSW to really understand the Norwest micro-climate and how we can influence it with good planning and design," he said.

“Effective collection of on-the-ground data and analysis by world leading experts is central to our vision for Norwest as a Smart City that leads the way in urban design."

“A more liveable urban environment is also a better business and living environment that can deliver energy cost savings and ensure Norwest is a place where people enjoy being and giving their best, as well as being a great place to live and work in all respects."

“Only through collaboration are we going to be able to realise a liveable precinct, so by sharing this knowledge we hope other developers and even homeowners will take steps to assist in lowering the urban heat in Norwest,” Spencer added.&nbsp;

As the Hills only zero carbon precinct, sustainability and an environmentally-friendly design has been at the forefront of Mulpha’s Norwest Quarter development.&nbsp;

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The buildings have been designed to use light coloured materials throughout for high solar reflectivity, as well as using awnings, screens and external shading structures.

To reduce heat in Norwest, there is also the plan for substantial rewilding of the land surface, with a high percentage of deep soil planting and canopy cover, tree planting in both private and public spaces, and water features established throughout the precinct.

Over 70 per cent of the project is dedicated to green, open spaces, which will only bolster the effects of the new plan, with 2,000 residents expected to call Norwest Quarter home upon completion.&nbsp;

According to the NSW and ACT Regional Climate Modelling (NARCLiM), Sydney is expected to experience an increase in average maximum and minimum temperature for all seasons in the future, reflecting the broader phenomenon of global warming.

A Norwest-specific urban cooling guide has been published this week for the benefit of all developers and design practitioners working in Norwest to understand urban overheating and introduce suitable cooling strategies. This will improve the performance of developments, create a more liveable environment and address the challenges of climate change at a local level.

This marks the culmination of two years of monitoring and analysing Norwest’s microclimate from a network of 15 environmental sensors around the Norwest precinct to determine how the precinct performs now as well as how it will develop as the climate continues to change.

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Dr Negin Nazarian, Scientia Senior Lecturer, UNSW Built Environment, said heatwaves are becoming more frequent and severe, which has serious consequences for public health, liveability and functionality of urban environments.

“Heatwaves in Australia kill more people than any other natural disaster, Nazarian said.&nbsp;

“With the increased rate of urban development, city and precinct scale climate is dramatically changed, resulting in additional warmth brought about by the urban heat island effect.

“It is paramount that we understand and closely monitor not only the climatic factors, but also the urban design characteristics that impact human health and well-being in the face of such heat events, and further promote smart city strategies to address this.”

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The buildings have been designed to use light coloured materials throughout for high solar reflectivity, as well as using awnings, screens and external shading structures.

alisonwarters@gmail.com

Mulpha and UNSW release plan to reduce urban heat in Norwest by two degrees

Aria Property Group always have a steady stream of interest from off the plan investors&nbsp;in their Brisbane apartment developments.

Investors who bought in to one of Aria&#39;s most recently completed developments, The Standard, Aria, located in the heart of the Fish Lane arts precinct, saw great success.

Those who bought pre-completion have secured resales between 10 per cent and 38 per cent more than what they paid.&nbsp;Owner-occupiers showed the greatest keenness on the resales.

The investors who decided to hold on&nbsp;to their apartments are seeing&nbsp;strong 5.48 per cent rental yields throughout the building.

Aria&#39;s latest development, Trellis, also in South Brisbane, is also expected to be a hit with investors.

The&nbsp;12-story building with 110 apartments is Aria&#39;s most sustainable yet, with&nbsp;60 percent of the building covered in greenery of some variety. It will feature&nbsp;trellises within which improve biodiversity, as well as solar technology and even Tesla batteries and charging stations.

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There&#39;s&nbsp;over 1,000 sqm of recreational amenity space, including the Temple of Wellness on the ground floor and the Residents&rsquo; Rooftop Club on level 13. That features magnesium baths and an infinity pool with views across Brisbane. Amenity is also high on the priority list for tenants.

Apartments in Trellis start from $739,000 for a two-bedroom, two-bathroom apartment. Three-bedroom apartments are priced from $1,084,000 to $1,224,000.

Completion is forecast for mid-2023.

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The Brisbane&nbsp;apartment market has continued to show strength over 2021, after a resilient 2020 in the wake of the pandemic.

Research from property data firm CoreLogic showed Brisbane&nbsp;apartment&nbsp;values rose 0.6&nbsp;per cent over September, triple&nbsp;the&nbsp;growth of apartments in Melbourne.

At the end of 2020, the median apartment value in Brisbane was at a yearly high of $390,000. Now it&#39;s $430,000.

Unit rental prices have also seen steady growth in 2021, up&nbsp;3.5 per cent over the past 12 months.

This&nbsp;growth trend is expected to continue, backed in large part by billions of dollars in investment from both private and public sectors as part of the pipeline for the 2032 Olympics.

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Aria Property Group have pushed the envelope not only on sustainability but value at their newest tower, Trellis in South Brisbane

Joel Robinson

Why investors snap up apartments in Aria Property Group's Brisbane apartment developments

Aria Property Group continue to improve sustainability across their South East Queensland residential apartment developments.

Their newest tower,&nbsp;Trellis, in South Brisbane, is their most sustainable to date.

Unabashedly green, as an homage to it&#39;s name, Aria&nbsp;have implemented environmentally forward practices across all aspects of the development, from the site itself, of which 60&nbsp;percent is covered in greenery of some variety, as well as the trellises within which improve biodiversity, to solar technology&nbsp;and Tesla batteries.

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All 110 two and three-bedroom apartments in the 12-storey building&nbsp;feature&nbsp;cross flow ventilated corridors, operable architectural screen doors,&nbsp;double-glazed glass and more. Residents will experience significantly cooler apartments compared to competitor projects, reducing reliance on air-conditioning and facilitating cost savings

With the growing scale of landscaping and greenery on Trellis, Aria is incorporating 60,000L of rainwater tanks to capture as much rainwater as possible to irrigate planting. This will assist in reducing Body Corporate water costs and recycle rainwater typically wasted in most buildings.

This is in line with Aria&#39;s proven track record in more than just sustainability,&nbsp;recognised as the Best High Density Developer in Australia from 2017 - 2019 with&nbsp;Oxley + Stirling Residences, The Melbourne Residences and Botanica Residences.

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ARIA say Trellis is one&nbsp;of their most liveable apartments to date. Designed by Rothelowman, they feature&nbsp;three metre high ceilings, Miele appliances, operable glazing and high-end contemporary finishes.

Reminiscent of an urban retreat, Trellis reflects a new style of resort living with&nbsp;1,119 sqm&nbsp;of recreational amenity across the Temple of Wellness on the ground floor and the Residents&rsquo; Rooftop Club on level 13. That features magnesium baths and an infinity pool with views across Brisbane.

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The development also offer a podcast/boardroom, serving as a multi-use space for working at home. There&#39;s also a&nbsp;Residents&rsquo; Wine Cellar.

Apartments in Trellis start from $739,000 for an apartment with two bedrooms and two bathrooms. Three-bedroom apartments are priced from $1,084,000 to&nbsp;$1,224,000.

Completion is slated for mid-2023

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Unabashedly green, as homage to it's name, Aria have implemented environmentally forward practices across all aspects of the development

jordan_55689

Aria Property launch South Brisbane apartments Trellis, their most sustainable development to date

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A prototype energy-efficient home, dubbed the ‘house with no bills’, is set to go under the hammer tomorrow, on Saturday.
The 199-square-metre, three-bedroom home, is located at 12 Monterey Drive, and was built as part of a study into sustainable living which was undertaken by real estate group MIRVAC.
<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/2020/2/24/HWNB%202.jpg" alt=""> 
Mirvac General Manager of Residential Victoria, Elysa Anderson, said the complex will be used to shape future projects.
“Designed to look, feel and operate the same way as a typical home, the House with No Bills experiment aimed to help address the increasing pressures of housing affordability and reduce environmental impact with market-based solutions,” she said.
The Cheltenham property was home to the Zimmerman family of four until December 2019.
An Evergen solar and battery system featuring CSIRO-developed intelligent energy management, along with a smart home automation system with environmental sensors controlling internal temperatures, are among the various eco-friendly innovations included to reduce the house’s reliance on grid electricity.
Smart meters and monitoring systems helped the Zimmerman family keep track of where and how their energy was being used, assisting the HWNB in achieving a 75 per cent energy cost saving (approximately $2,000) in 12 months, with the potential to operate with net zero energy bills.
<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/2020/2/24/HWNB%203.jpg" alt="">
Built in March 2018, the modern two-storey house has an open-plan kitchen, living and dining area, two bathrooms and a powder room, and an outdoor entertaining area.
Tiles downstairs are efficient for thermal protection, while upstairs bedrooms are carpeted. There is a single car garage, plus space to park in the driveway.
MIRVAC’s Baden Lucas will auction the house, which is being marketed with expectations from $775,000 to $850,000.
Cheltenham’s median house price is $1.267 million.
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house with no bills prototype in Cheltenham listed for sale

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New research by RMIT urban experts on low-carbon housing in Horsham has found that households could be better off by $1,000 per year and boost their health and living conditions.
The study led by RMIT’s Centre for Urban Research (CUR) reported that low-carbon houses in comparison with ‘standard’ residences in the north-west Victorian town, provided better financial relief. 
Lead author Dr Trivess Moore from CUR said that although low-carbon housing is considered best international practice, it is still perceived as expensive as most housing standards studies only rely cost-benefit analysis (CBA) to assess their value.
Horsham Catalyst Research and Evaluation, conducted by CUR and funded by the Victorian Department of Health and Human Services (DHHS), illustrates how such analysis fails to take into account flow-on financial benefits such as reduced energy bills and lower mobility costs, overlooking the effects on householders' health and quality of life. 
“Our study clearly shows that the housing sector’s over-reliance on CBA may be ignoring some important health benefits of different housing arrangements, particularly for low-income tenants,” he said.
“Households living in the Catalyst houses reported they had extra spending money for Christmas presents, personal debt or holidays, due to low utility bills, with one household reported permanently removing itself from all Centrelink payments due to the amount they saved.
“These savings strongly contributed to reduced stress and better mental health for tenants.”
The project conducted a multi-year evaluation of four new two-bedroom, single-storey, low-carbon designed public housing units with a National House Energy Rating Scheme rating of 8.9 stars (Catalyst houses) in addition to seven one-and two-bedroom Control dwellings.
The Catalyst houses were found to perform substantially better overall compared to the Control DHHS dwellings on key measures such as power and water consumption, environmental performance and thermal comfort in a region known for its climate extremes.
View the <a href="https://cur.org.au/cms/wp-content/uploads/2016/08/horsham-final-11.pdf" target="_blank">full report</a> online.
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jonathanchancellor-7SQnKwU6yx

Property 101: Horsham study on low-carbon housing 

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A carbon-positive residential development is coming to Tasmania.
The Commons Hobart is an environmentally sustainable development of just 30 apartments.
It will produce renewable energy onsite, and will also contribute solar-generated electricity back to the grid.
Over the life cycle of the project – from removal of the site’s existing building through construction and ongoing occupation, then onwards to its eventual demolition far into the future – the project will avoid generating, or will capture and offset, more carbon than it produces.
The project, created by ethical developer Small Giants Developments, is located on Bathurst Street in Hobart’s CBD.
It will achieve, on average, a 9-star energy rating - the first such project in Australia, the developers claim. 
Small Giants Developments parent company, Small Giants, was Australia’s founding B Corp member.
The Hobart project is based on its Melbourne project The Commons Brunswick.
Designed by acclaimed Tasmanian architectural practice Core Collective, The Commons Hobart is a model for striking a balance between affordability, sustainability and liveability, where the focus is on people as well as architectural form.
Small Giants Developments general manager Clint Hare explains that every possible carbon saving was looked at in the design of the project.
“We are implementing a low impact design across the project. For example, concrete is a significant source of carbon emissions in the construction industry. To mitigate that we begin with a low-emission concrete for the base structure,” Hare says.
“That kind of thinking applies at every stage of the development. The site itself was selected for its north-facing aspect, to maximise solar gain. The solar benefit happens to be in addition to the site enjoying enviable views of Mount Wellington.”
Passive design principles will naturally moderate the indoor temperature of the apartments, along with other environmentally sustainable initiatives including on-site solar power generation, water collection and re-use, high-efficiency appliances and heat pumps, and carbon offsetting.
As well as its range of one, two and three-bedroom dwellings, The Commons includes a variety of shared spaces that are designed to bring people together, and foster a sense of community. These facilities include a ground-floor communal garden, and a communal kitchen and food garden on the roof terrace.
Continuing the theme of carbon reduction, the building will include bicycle parking for residents but only three car parks, with these spaces allocated to a car share program for residents’ use.
The Commons Hobart features a contemporary design that celebrates raw, natural materials. Timber is used throughout, sequestering carbon. This includes double-glazed timber-framed windows, as well as recycled Tasmanian oak and floorboards; the facade features a charred wood exterior. Similarly, raw brass is used for the tapware and door handles throughout.
One bedroom apartments at The Commons Hobart are priced at $350,000 - $389,000, while two bedroom apartments are $495,000 to $630,000, and three-bedrooms apartments are available for between $635,000 to $825,000. 
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jrobinson-rf4aSBido9

Carbon positive residential development coming to Hobart

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GUEST OBSERVATION
Nothing uses more resources or produces more waste than the buildings we live and work in. Our built environment is responsible for half of all global energy use and half of all greenhouse gas emissions. Buildings consume one-sixth of all freshwater, one-quarter of world wood harvests and four-tenths of all other raw materials. The construction and later demolition of buildings produces 40% of all waste.
The sustainability of our buildings is coming under scrutiny, and “green” rating tools are the key method for measuring this. Deakin University’s School of Architecture and Built Environment recently reviewed these certification schemes. Focus group discussions were held in Sydney and Melbourne with representatives in the field of sustainability – including government, green consultancies and rating tool providers.
Two main concerns emerged from our review:
<ol>
<li>
Sustainability ratings tools are not audited. Most ratings tools are predictive, while those few that take measurements use paid third parties. Government plays no active part.
</li>
<li>
The sustainability parameters measured only loosely intersect with the building occupants’ sustainability concerns. Considerations such as access to transport and amenities are not included.
</li>
</ol>
<img src="https://images.theconversation.com/files/207055/original/file-20180220-116343-j14zhh.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" alt="">
Focus group sessions run by Deakin University helped identify problems with current sustainability ratings. Author provided
That’s the backdrop to the sustainability targets now being adopted across Australia. Australia has the highest rate of population growth of any developed country. The population now is 24.8 million. It is expected to reach between 30.9 and 42.5 million people by 2056.
More buildings will be needed for these people to live and work in. And we will have to find ways to ensure these buildings are more sustainable if the targets now being adopted are to be achieved.
Over 80% of local governments have zero-emissions targets. Sydney and Canberra have committed to zero-carbon emissions by 2050. Melbourne has pledged to be carbon-neutral by 2020.
So how do green ratings work?
Each green rating tool works by identifying a range of sustainability parameters – such as water and energy use, waste production, etc. The list of things to be measured runs into the dozens. Tools differ on the parameters measured, method of measurement, weightings given and the thresholds that determine a given sustainability rating.
There are over 600 such rating tools worldwide. Each competes in the marketplace by looking to reconcile the credibility of its ratings with the disinclination of developers to submit to an assessment that will rate them poorly. Rating tools found in Australia include Green Star, NABERS, NatHERS, Circles of Sustainability, EnviroDevelopment, Living Community Challenge and One Planet Communities.
So, it is easy enough to find landmark developments labelled with green accreditations. It is harder to quantify what these actually mean.
Ratings must be independently audited
Government practice, historically, has been to assure building quality through permits. Planning permits ensure a development conforms with city schemes. Building permits assess structural load-bearing capacity, health and fire safety.
All this is done off the plan. Site inspections take place to verify that the building is built to plan. But once a certificate of occupancy is issued, the government steps aside.
The sustainability agenda promoted by government has been grafted onto this regime. Energy efficiency was introduced into the residential building code in 2005, and then into the commercial building code in 2006. At first, this was limited to new buildings, but then broadened to include refurbishment of existing structures.
Again, sustainability credentials are assessed off the plan and certification issued once the building is up and running. Thereafter, government walks away.
We know of only one longitudinal energy performance study carried out on domestic residences in Australia. It is an as-yet-unpublished project conducted by a retiree from the CSIRO, working with Indigenous communities in Far North Queensland.
The findings corroborate a recent study by Gertrud Hatvani-Kovacs and colleagues from the University of South Australia. This study found that so-called “energy-inefficient” houses, following traditional design, managed under certain conditions to outperform 6- and 8-star buildings.
Sustainability tools must measure what matters
Energy usage is but the tip of the iceberg. Genuine sustainability is about delivering our children into a future in which they have all that we have today.
Home owners, on average, turn their property around every eight years. They are less concerned with energy efficiency than with real estate prices. And these prices depend on the appeal of the property, which involves access to transport, schools, parks and amenities, and freedom from crime.
Commercial property owners, too, are concerned about infrastructure, and they care about creating work environments that retain valued employees.
These are all core sustainability issues, yet do not come up in the rating systems we use.
<img src="https://counter.theconversation.com/content/91655/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1">If government is serious about creating sustainable cities, it needs to let go of its limited, narrow criteria and embrace these larger concerns of “liveability”. It must embody these broader criteria in the rating systems it uses to endorse developments. And it needs an auditing and enforcement regime in place to make it happen.
Igor Martek, Lecturer In Construction, Deakin University
M. Reza Hosseini, Lecturer in Construction, Deakin University
This article was originally published on <a href="http://theconversation.com" target="_blank">The Conversation</a>. Read the <a href="https://theconversation.com/greenwashing-the-property-market-why-green-star-ratings-dont-guarantee-more-sustainable-buildings-91655" target="_blank">original article</a>.
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j.ballantyne1990-6AQqhLzZaK

Why 'green star' ratings don't guarantee more sustainable buildings

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Ian Moore, the former Clean Energy Finance Corporation board member, has sold his eco-friendly home, Coorabell Dreaming, in the Byron Bay hinterland.
The home sold for $3.76 million through McGrath Byron Bay agent Ruth Gotterson to a Brisbane buyer.
Designed by local architect Sam Zaher, <a href="https://www.realestate.com.au/sold/property-house-nsw-coorabell-127791986" target="_blank">the three-bedroom house</a> sits 100 metres above sea level with views over the Myocum Valley to the ocean.
Coorabell Dreaming is completely off the grid, relying on a 45 solar panel system, a battery bank and a back-up generator too.
The double glazed home has multi-layered insulation to further minimise energy consumption.
It also comes with a 14,000 tree rainforest plantation.
There are two 45,000 litre water tanks.
Moore, who considers himself an “economic green” and his wife, Di, spend most of their time in their Sydney home.
Initially had it with a price guide of $4.2 million last year, with no price guidance more recently from McGrath selling agent Ruth Gotterson.
Moore also served as the Head of Corporate Finance at Bankers Trust Investment Bank and has been an Independent Non-Executive Director of Challenger Listed Investments.
This article first appeared in The Daily Telegraph. 
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Eco-friendly Byron Bay hinterland home sells for $3.76 million

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GUEST OBSERVATION
Covering roofs and walls of buildings with vegetation is a good way of reducing greenhouse gas emissions. And these green roofs and walls make cities look nicer. Toronto’s central business district adopted a policy of establishing green roofs on around half of all city buildings in 2009. Research shows this could reduce maximum city temperatures by up to 5℃.
We spent the past 12 months analysing the case for more greenery on Australian city buildings, drawing on international comparisons. We’ve shown that a mandatory policy, coupled with incentives to encourage new and retrofitted green roofs and walls, will provide environmental, social and business benefits.
These include improved air quality, energy conservation and reductions in stormwater run-off from buildings, which would decrease flash flooding. Green roofs and walls also become new habitats for biodiversity and can be pleasant spaces for social interaction in dense urban areas.
We found numerous studies confirming that greenery on inner-city buildings reduces the urban heat island effect, which is when city centres are hotter than surrounding suburban and outer-urban areas.
<img src="https://images.theconversation.com/files/223984/original/file-20180620-137746-jb859j.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" alt="">
Green roofs are great social spaces. Author provided, Author provided
What other countries are doing
We examined international case studies of cities embracing green roofs and walls to review policy frameworks which could be suitable for Australia. A range of measures and policies exist and vary depending on building types (buildings need specific features to host vegetation) and the degree to which policies can be enforced.
Singapore is leading in this area. It markets itself as a “garden city” to attract investment, visitors and commerce. Green roofs and walls are a vital and visual manifestation of this policy.
<img src="https://images.theconversation.com/files/223985/original/file-20180620-137720-o4cmgn.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=237&amp;fit=clip" alt="">
Green walls are aesthetically pleasing. Author provided
Greenery is ingrained in Singapore’s development sector and is boosted by incentives, grants, awards, certification schemes and government-led development. Through this voluntary-heavy (yet supported) effort, Singapore increased its number of green roofs and spaces nine-fold between 2006 and 2016.
Rotterdam’s efforts weren’t as extensive as Singapore’s, but the city more than doubled its green roof area from 2012-2017 through incentives, grants, tax benefits and demonstration projects.
London increased its total green-roof area more than four-fold from 2005-2016. This was partially achieved through a biodiversity action plan.
And Toronto has the second-largest area of green roofs of the four cities we studied. This has been delivered through a mandatory policy, introduced in 2009, that requires all new developments with roofs of 2,000m² or more to install green roofs.
The case in Australia
We modelled what could be delivered in the City of Sydney and the City of Melbourne based on the measures taken in Singapore (which is voluntary-heavy), London (voluntary-light), Rotterdam (voluntary-medium) and Toronto (mandatory).
We combined this with data on actual green building projects in 2017 in Sydney and Melbourne to show the potential increase of projects in each city based on the four policies.
In the Sydney local government area, 123 green roof and wall projects were under way in 2016. The below table uses this base to estimate what the numbers of such projects would be for three time periods, based on the policies in the four scenarios modelled.
<iframe src="https://datawrapper.dwcdn.net/7ff2z/3/" frameborder="0" scrolling="no" width="100%" height="357"></iframe>
In the Melbourne local government area, 28 green roof and wall projects were under way in 2016. The table below shows how these could increase based on policies of the four case studies modelled.
<iframe src="https://datawrapper.dwcdn.net/s2Efy/1/" frameborder="0" scrolling="no" width="100%" height="357"></iframe>
How Australia can get on board
Sydney and Melbourne have green roof and green wall policies aligned with their 2030 and 2040 sustainability targets, launched in 2012 and 2015 respectively. Sydney has the Green Roofs and Walls Policy Implementation Plan, while Melbourne has the Growing Green Guide 2014.
These policies appear most aligned with the voluntary-light approach adopted in London. Sydney had a 23% increase in green roofs since its policy launch, although this was from a very low starting point. Melbourne also reports an increase in green roofs and walls, though the amount of uptake isn’t publicly available.
There are, of course, barriers to greening up buildings. These include costs as well as lack of experience in the industry, especially in terms of construction and management. Professional capacity for green roofs is still in a developing phase and further training and skill development are needed.
<img src="https://images.theconversation.com/files/224163/original/file-20180621-137750-i347f7.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" alt="">
Green wall adds vegetation to an aged care home in Sydney.
Around 87% of the building stock Australia will have in 2050 is already here, and a large proportion of existing buildings could be retrofitted. We recommend a voluntary approach using a mix of initiatives for building owners, such as tax benefits and credits in green building tools.
Focusing on new buildings is likely to lead to more modest growth rates in the short to medium term, relative to alternative approaches such as retrofitting. The annual growth rate of new stock is around 1-3%, which means that policies focusing on new stock will have a substantial impact over the long term.
However, in the short to medium term, a retrofit policy would have greater impact given the numbers of existing buildings suitable for this.
<img src="https://counter.theconversation.com/content/97088/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1">Local government areas can also promote the evidence showing the lift in property values in areas with more green infrastructure – in some instances up to 15%. This should encourage voluntary uptake.
Sara Wilkinson, Associate Professor, School of the Built Environment, University of Technology Sydney
Paul J Brown, Senior Lecturer – Creative Intelligence | Faculty of Transdisciplinary Innovation &amp; Senior Lecturer – Accounting | UTS Business School, University of Technology Sydney
Sumita Ghosh, Senior Lecturer, School of the Built Environment, University of Technology Sydney
This article was originally published on <a href="http://theconversation.com" target="_blank">The Conversation</a>. Read the <a href="https://theconversation.com/australian-cities-are-lagging-behind-in-greening-up-their-buildings-97088" target="_blank">original article</a>.
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