If you are a property investor in Brisbane, you are likely aware that the landscape of investment has shifted significantly. The 2026 Federal Budget, announced on 12 May, has introduced changes that will alter the way you approach property investment from that date onwards.
In summary, purchasing an established investment property after this date means you will lose the benefits of negative gearing starting from 1 July 2027. if you opt to build new, you will retain this advantage. This is not a loophole; rather, it is the outcome of a policy aimed at increasing the supply of new housing. The government is encouraging new builds, which come with tax benefits, while established properties will no longer enjoy these perks.
For those investors who have consistently purchased and held established properties, this marks a significant shift in strategy. If you are currently evaluating your next investment move, the focus on building new properties is now more pertinent than ever.
Understanding the Key Changes in Property Investment Rules
Prior to 12 May 2026, negative gearing operated uniformly for both new and established properties. If your rental income fell short of your expenses — including mortgage interest, rates, insurance, and maintenance — you could offset that loss against your overall income, thereby lowering your tax liability. This mechanism was well understood by most investors and influenced their investment strategies.
Starting from 1 July 2027, this offset will only apply to new builds. If you purchase an established property post-12 May 2026, your rental losses can only be offset against other property income. This means you cannot reduce your taxable income from salary or other investments. The tax benefits that made negatively geared properties attractive to higher-income earners will be eliminated for existing stock.
New builds will retain the full benefits of negative gearing. investors in new builds have the option to choose between a 50 per cent capital gains tax (CGT) discount or cost base indexation upon sale, depending on which is more beneficial for their circumstances.
For high-income individuals contemplating their next investment, the post-tax financial considerations for new builds versus established properties have shifted dramatically. If your accountant has not yet discussed this with you, be sure to initiate that conversation.
Defining What Qualifies as a New Build
This is where the details become crucial.
The government's criteria for an eligible new build are quite specific: the property must contribute to increasing housing supply. This includes:
- A dwelling constructed on vacant land is eligible. If it's a new construction on an empty block, it qualifies.
- A duplex or dual occupancy resulting from a knockdown rebuild qualifies, provided that you are replacing one dwelling with more than one. For instance, knocking down a single house and constructing a duplex increases supply and meets the criteria.
- However, a knockdown rebuild that replaces one house with another single house does not qualify. The government documentation explicitly states that a one-for-one replacement of free-standing houses is NOT an eligible new build for negative gearing purposes.
- A newly constructed apartment purchased off the plan qualifies as a new build.
- A granny flat added to an existing property does NOT qualify for negative gearing on the granny flat portion.
The implication for Brisbane investors is clear: if you own a substantial block and are considering your next steps, opting for a duplex or dual occupancy instead of a single dwelling is no longer just a design preference. It now determines whether your build qualifies as a new build under the current regulations.
Why High-Value Investments Over $1M Are Particularly Attractive Now
The individuals most impacted by these changes are high-income earners — those who previously benefited most from negative gearing by offsetting losses against income taxed at 47 cents to the dollar.
These are precisely the investors that Iconic targets for construction.
A duplex or dual occupancy project with Iconic typically starts at $1M for the construction alone. This is not a standard project home price; it reflects a custom, architect-designed build featuring two fully independent dwellings tailored for the block and built to last.
At this price point, the tax implications become significant. The rental income generated from two dwellings is robust, making the negative gearing advantage on a high-value build considerable. the CGT position for a quality new build held over the medium to long term, particularly in a Brisbane market experiencing genuine supply constraints, is promising.
This is not financial advice. Consult your accountant for tailored advice based on your specific situation. the overall argument for a high-quality duplex or dual occupancy build in Brisbane has rarely been stronger.
Understanding the Timeline and Its Importance
This is the aspect that often surprises investors.
The time from your first discussion with a builder to receiving keys for a duplex or dual occupancy build is at least 18 months. Design and approvals alone can take between 4 to 6 months, followed by construction which typically lasts 10 to 14 months.
The new regulations will come into effect on 1 July 2027, which is only 13 months away.
Investors aiming for a completed, tenanted new build before the regulations change have likely already missed this window. The right perspective is this: those wanting to be strategically positioned under the new rules — with a qualifying new build underway or contracted — must make decisions now, not in six months.
You need to identify or already own the land. Your financing needs to be arranged. A feasibility assessment of what can be built must be conducted. Each of these steps requires time, and they must be completed sequentially.
If you are serious about this opportunity, the time to discuss your plans is now. This is not about creating urgency; it’s about adhering to real timelines.
Identifying Ideal Investment Blocks in Brisbane
Not every block is suitable for a duplex or dual occupancy build, and some locations are not conducive to investments at this magnitude. Here are key factors to consider.
Size and zoning: Under the Brisbane City Plan 2014, a minimum of 600 square metres is generally required for dual occupancy. The Redlands have similar requirements under the Redland City Plan. Zoning is also crucial — some zones permit dual occupancy, while others do not. Conducting a feasibility assessment before purchasing land is essential.
Slope: A flat or gently sloping block is far cheaper to build on than a steep one. Site costs for a sloping block can add between $50,000 to $150,000 or more to your overall project. Factor these costs into your land purchase budget.
Location and demand: Areas such as the Redlands — including Cleveland, Thornlands, Victoria Point, and Capalaba — demonstrate strong and consistent rental demand for well-designed dual occupancy and duplex properties. investors must consider that council rates in the Redlands are significantly higher than those in Brisbane City Council. This discrepancy can accumulate on a dual occupancy or duplex and must be included in your financial calculations before acquiring a block.
For investors focusing on Brisbane City Council areas, medium-density suburbs like Wynnum, Manly, Carindale, Bulimba, Cannon Hill, Camp Hill, Morningside, and Coorparoo are currently where the action is. These locations offer strong rental demand, good access to amenities, and zoning that generally supports dual occupancy and duplex development.
Existing dwelling: If you are purchasing a block with an existing house, be sure to account for demolition costs, which start around $25,000 depending on the size and whether asbestos is present. A knockdown rebuild that transitions from one dwelling to two qualifies as a new build under the 2026 budget regulations, whereas a one-for-one replacement does not.
For a thorough breakdown of the costs associated with building in Brisbane, refer to our 2026 custom home cost guide →
Navigating the Build Process for Investment Properties
The process of building a duplex or dual occupancy for investment purposes is not dramatically different from constructing a custom home; however, there are several key considerations to keep in mind.
Financing differs. A construction loan for an investment build releases funds in stages as construction progresses rather than as a lump sum. Your broker should be well-versed in construction finance, and your borrowing structure must reflect that you won’t have rental income during the construction phase. Ensure your financing is organised before proceeding with any other steps — it influences every subsequent decision. For a detailed order of operations, refer to our Brisbane new build guide →
Design impacts yield. A duplex or dual occupancy designed solely to minimise construction costs may lead to two dwellings that feel subpar, which tenants will notice. Thoughtful design leads to better tenants, lower vacancy rates, and increased long-term capital value. Investing in design choices that make a property feel like a quality standalone dwelling is worthwhile.
Fixed-price contracts are essential. For an investment build, a fixed-price contract is crucial. It is what your lender will demand and what safeguards your budget. Variable cost contracts on investment properties can lead to budget overruns at critical moments. Ensure your builder provides a genuine fixed-price contract and clarify what is included — and what is excluded — prior to signing.
Engage a builder with in-house design capabilities. This is especially important for investors compared to owner-occupiers. An independent architect or designer may create beautiful plans without consideration of costs, leading to surprises when presented to a builder. A builder with an in-house design team ensures that cost considerations remain central to every design decision, preserving the integrity of your investment model. For more insights on this, read our section on designer selection in the Brisbane build guide →
Comparing Dual Occupancy and Duplex for Investment Success
Both options can be successful, but understanding the difference is important:
A duplex consists of two dwellings connected side by side or stacked, sharing a common wall. Generally, this is more efficient to build on a standard block. Subdivision into two separate titles is possible after construction.
A dual occupancy features two dwellings on one title, either attached or detached. A typical layout includes a house at the front and a second home at the rear. This arrangement can also be subdivided later if the block size and zoning permit.
For investors, key considerations include: what does your block permit, how does the local rental market respond, and what is the best strategy — maintaining both dwellings on one title or subdividing for potential separate sale or financing flexibility later? These are vital discussions to have with your builder and accountant before finalising designs.
For an in-depth analysis of dual occupancy options in Brisbane and the Redlands, visit our dual occupancy page →
Have a Question?
Common Queries Addressed
Does a knockdown rebuild qualify for negative gearing under the new regulations?
Only if it increases the number of dwellings. For example, knocking down a single house and building a duplex qualifies, whereas replacing one house with another single house does not. The government’s policy specifically targets new supply rather than replacement supply.
Can I negatively gear a new build duplex purchased from a developer?
Only the first buyer from the builder qualifies, as long as the property has not been occupied for more than 12 months before the first sale. If you are purchasing a completed new build from a developer who constructed it as a development project, ensure you review the occupancy history carefully.
Must I have the build completed before 1 July 2027 to qualify?
No. The critical factor is that the property is a new build — not its completion date. What matters is that you do not purchase an established property after 12 May 2026. A new build that is contracted and under construction after this date still qualifies.
What is the minimum block size for a duplex in Brisbane?
Typically, 600 square metres is required under the Brisbane City Plan 2014, but zoning and overlays also come into play. Some zones do not permit dual occupancy regardless of block size. A feasibility assessment of your specific block prior to purchase is critical.
How long does it take to build a duplex or dual occupancy?
From the initial consultation to handover, you should budget for a minimum of 18 months. Design and approvals usually take 4 to 6 months, followed by construction which lasts 10 to 14 months. Complications from site conditions or council assessments can extend this timeline.
Should I consult with my accountant or builder first?
Both discussions are valuable and should occur now. Your accountant can evaluate whether the tax implications make sense for your particular income and investment structure. Your builder can assess whether your block is suitable and your budget realistic for a qualifying new build. Each conversation is brief but informative.
Interested in Discussing Your Investment Build?
If you are a Brisbane investor contemplating your options following the budget changes and want an honest discussion about what is feasible — including block viability, construction costs, timelines, and qualifying criteria — reach out to the team at Iconic Homes.
We build across Brisbane, including Cleveland and the Redlands. We will inquire about your budget early on, provide an honest assessment of what it can achieve, and outline a realistic process from start to handover.
No pressure, no jargon; just a straightforward conversation. Call us at 0402 017 072 or schedule a free consultation →
Original Article First Published At: Why Brisbane Investors Are Building Instead of Buying in 2026
