HIA Urges National Approval for Prefab Backyard Homes: Unlocking Thousands of New Houses

HIA Calls for National Unified Approval: How Prefabricated Granny Flats Can Unlock Thousands of New Homes

News Focus: HIA Urges States to Standardise Prefabricated Granny Flat Approvals

On March 12, 2026, the Housing Industry Association (HIA) issued a significant call, urging state and territory governments to standardise the approval process for prefabricated granny flats. HIA pointed out that the current disparate and cumbersome approval procedures across states are hindering the rapid growth of Australia's housing supply, especially amidst the severe current housing crisis. HIA believes that simplifying and standardising the approval process could effectively unlock thousands of additional homes, injecting much-needed vitality into the market. This announcement was officially released by the HIA and widely reported by major media outlets.

Impact Chain Analysis: From Approval Unification to Housing Supply

If adopted by federal and state governments, HIA's call will have a profound impact on Australia's housing and construction sectors. The chain of impact is clear:

1. Improved Approval Efficiency, Reduced Time Costs: Currently, approval requirements for granny flats vary across states, leading to developers and homeowners facing different regulations and waiting times in different regions. For instance, New South Wales (NSW) introduced "Exempt and Complying Development" policies in 2009, allowing eligible granny flats to be approved within 20 working days, significantly accelerating the construction process. However, other states like Victoria or Queensland may face longer approval cycles and more complex planning restrictions. HIA's recommendation aims to extend NSW's successful experience nationwide, meaning approval times across the country could be drastically cut from months, or even over a year, to just weeks.

2. Optimised Construction Costs: Reduced approval times directly lower upfront project costs and holding costs. Developers and homeowners avoid lengthy interest payments on loans, design modification fees, and potential inflation costs incurred during waiting periods. Furthermore, standardised approval processes will reduce uncertainty, allowing builders to plan resources and labour more efficiently, thereby lowering overall construction costs. For prefabricated homes, the inherent efficiency of factory production already offers cost advantages, and simplified approvals will further amplify this benefit, making the overall delivery cost of prefabricated granny flats more competitive.

3. Increased Housing Supply, Eased Housing Pressure: HIA estimates that simplifying approvals could unlock thousands of additional homes. These granny flats are typically built on existing residential land, requiring no additional land development, making them an effective way to quickly increase housing supply. In major cities like Sydney, where the median house price exceeds AUD 1.4 million and rents continue to soar, housing affordability has become a severe social issue. Granny flats not only provide additional living space for families (e.g., for elderly parents or adult children) but can also serve as a source of rental income, offering financial support to homeowners while increasing rental market supply.

4. Driving the Prefabricated Construction Industry: Prefabricated homes, with their advantages of factory production, controllable quality, and fast construction, will gain greater scope for development under simplified approval processes. Once approval processes are standardised and efficient, the "fast delivery" advantage of prefabricated homes will be maximised, becoming a key solution to the housing crisis. Companies like EASOVA, specialising in prefabricated granny flats, will be able to respond more quickly to market demand, providing more high-quality, cost-effective housing options.

Historical Comparison: The Potential of National Unification from NSW's 2009 Policy

Australia is not without successful precedents in housing approvals. In 2009, the New South Wales government introduced the State Environmental Planning Policy (Affordable Rental Housing) 2009, allowing granny flats meeting specific criteria to be built as "exempt development" or "complying development" projects. This policy significantly streamlined the approval process, reducing what could have been months of approval time to 20 working days, or even less. Since then, the number of granny flat constructions in NSW has surged, becoming a crucial component in alleviating housing pressure.

However, other states have not fully followed suit. For example, Queensland and Victoria still have numerous cumbersome aspects regarding granny flat size restrictions, usage limitations (such as whether they can be rented to non-family members), and approval processes. This "multi-system" situation not only increases operational complexity for builders but also limits the potential of granny flats nationwide.

HIA's call is based on NSW's successful experience, aiming to extend this efficient, simplified model across the country, hoping to replicate NSW's achievements in increasing housing supply nationwide.

Data Support and Market Trends

• Housing Shortage: The National Housing Finance and Investment Corporation (NHFIC) predicts Australia's housing shortage will reach 106,000 dwellings by 2027. HIA believes granny flats are a crucial means to bridge this gap.
• Granny Flat Market Potential: According to ABS data, Australia has over 5 million detached houses, a significant portion of which have the potential for granny flat construction. If even a small fraction of these are converted into granny flats, hundreds of thousands of new homes could be created.
• Rising Construction Costs: In recent years, due construction costs have steadily increased due to the pandemic and supply chain disruptions. For example, according to the CoreLogic Cordell Construction Cost Index, national residential construction costs rose by 10.4% in 2021 and another 11.9% in 2022. Streamlining approval processes helps reduce indirect costs, partially offsetting the pressure from rising material and labour costs.
• Tight Rental Market: Sydney's vacancy rate has long been below 1%, with median rents rising by approximately 20% over the past year, reaching over AUD 700 per week. Granny flats, as additional rental supply, will help alleviate rental pressure.

Future Outlook: 2-3 Possible Scenarios and Their Impact

1. Best-Case Scenario: Rapid National Unified Approval Implementation. If the federal government and states reach an agreement to swiftly implement national unified, simplified approval standards for granny flats, we will see an explosive growth in granny flat construction. It is expected that the number of new granny flats nationwide will double within the next 2-3 years, reaching tens of thousands. This will significantly alleviate housing shortages and rental pressure in major cities and propel the prefabricated construction industry to become a primary driver of housing supply. For homeowners, the barrier and risk of building a granny flat will be greatly reduced, and the return on investment period shortened.
2. Moderate Scenario: Gradual Adoption by Some States, but Slow Progress. Some states may adopt HIA's recommendations cautiously or gradually due to local planning, political considerations, etc. In this case, granny flat growth will show regional disparities, with areas like NSW, which already have mature policies, continuing to lead, while other states slowly catch up. Market supply improvements will be incremental and unable to fully resolve the housing crisis in the short term. Prefabricated home companies will still need to adapt to specific requirements in different states, but the overall market environment will gradually improve.
3. Worst-Case Scenario: States Maintain Status Quo, Unified Approval Stalled. If HIA's call fails to receive an effective response, and states continue to operate independently, the potential of granny flats will remain constrained by existing cumbersome approval systems. Housing supply shortages will continue to worsen, construction costs will remain high due to uncertainty, and rental market pressure will be difficult to alleviate. In this scenario, while the advantages of prefabricated homes will still exist, their market expansion rate will be significantly limited, and homeowners' willingness to invest in granny flats will decrease due to approval risks.

What This Means for Homeowners and Investors?

HIA's call foreshadows a potential golden opportunity. For Australian homeowners with sufficient backyard space, building a granny flat can not only provide additional living space for the family but also generate substantial passive income through rent, effectively hedging against rising living costs and mortgage pressure. In Sydney, a two-bedroom granny flat can fetch weekly rents of AUD 500-650, amounting to an annual rental income of AUD 26,000 to AUD 33,000, offering a very attractive return on investment.

For investors, granny flats offer a low-risk, high-return investment option, especially in the current market environment of high interest rates and squeezed returns on traditional property investments. Simplified approvals will further lower investment barriers and increase project certainty.

EASOVA's Advantage: Seizing Opportunities Amidst Change

As a leading prefabricated granny flat company in Australia, EASOVA understands the importance of the approval process for project success. We are committed to providing efficient, transparent solutions to adapt to market changes.

• 90% Factory Prefabrication: EASOVA's granny flats are 90% built in the factory, meaning faster construction, less impact from weather, and strict quality control, significantly reducing on-site construction time.
• Fixed Price: We offer transparent fixed-price contracts, ensuring clients know the total cost before the project begins, avoiding common budget overruns in traditional construction, especially during periods of fluctuating material and labour costs. This provides clients with great cost certainty.
• 3-Month Fast Delivery: Combining efficient factory production with simplified on-site installation, EASOVA commits to delivery within 3 months (from site preparation to home completion), significantly faster than the 6-12 months for traditional construction. If national approval processes are simplified, this advantage will be even more pronounced.
• No Weather Delays: Factory-based production avoids construction delays caused by adverse weather conditions like rain or extreme heat, ensuring projects are completed on schedule.
• Cost Certainty: From design to delivery, EASOVA's standardised processes provide clients with unparalleled cost and time certainty, allowing you to plan your investment with greater peace of mind.

HIA's call is an important step towards a more efficient and sustainable future for Australia's housing market. EASOVA is ready to leverage the advantages of prefabricated construction and join you in seizing this historic opportunity to build better homes.