Building Over Buying: Brisbane Investors’ 2026 Choice

If you own an investment property in Brisbane, it is crucial to recognise that the property investment landscape has experienced considerable transformations. The 2026 Federal Budget, presented on 12 May, has introduced significant changes that will influence your investment strategy from that date forward.

To summarise, acquiring an established investment property after this date will mean that you will lose negative gearing benefits starting from 1 July 2027. Conversely, if you choose to build new properties, you will retain this advantage. This shift results from government policies designed to boost the supply of new housing. Authorities are actively promoting new builds, which come with tax benefits, while established properties will no longer benefit from these incentives.

For investors who have traditionally focused on purchasing and holding established properties, this represents a significant strategic pivot. If you are currently assessing your next investment move, the focus on constructing new properties is now more relevant than ever.

Explore the Significant Changes in Property Investment Regulations

Prior to 12 May 2026, the principle of negative gearing applied equally to both new and established properties. If your rental income fell short of covering expenses—which encompassed mortgage interest, rates, insurance, and maintenance costs—you could offset those losses against your total income, thereby reducing your tax liability. This mechanism was well understood by most investors and played a pivotal role in shaping their investment strategies.

Starting from 1 July 2027, this offset will exclusively apply to new builds. If you purchase an established property after 12 May 2026, your rental losses will only offset against other property income. you will not be able to reduce your taxable income from salaries or other investments. The attractive tax benefits that previously made negatively geared properties appealing to high-income earners will be eliminated for existing stock.

In contrast, new builds will maintain the full advantages of negative gearing. Investors in new builds will have the option to choose between a 50 percent capital gains tax (CGT) discount or opting for cost base indexation upon sale, depending on which option best suits their financial situation.

For high-income individuals considering their next investment, the post-tax financial ramifications of new builds compared to established properties have undergone significant changes. If you have not yet consulted your accountant regarding these modifications, it is advisable to prioritise that discussion.

Clarifying What Constitutes a New Build

This is where the details become extremely important.

The government’s criteria for an eligible new build are very clear: the property must contribute to increasing the housing supply. This includes:

• A dwelling constructed on vacant land is eligible. If it involves a new construction on an empty plot, it qualifies.
• A duplex or dual occupancy resulting from a knockdown rebuild qualifies, provided you are replacing one dwelling with more than one. For instance, demolishing a single house and constructing a duplex enhances supply and meets the criteria.
• However, a knockdown rebuild that replaces one house with another single house does not qualify. 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 that portion.

The implications for Brisbane investors are clear: if you own a significant block and are contemplating your next steps, opting for a duplex or dual occupancy instead of a single dwelling is no longer merely a design choice. It now influences whether your build qualifies as a new build under the current regulations.

Exploring the Benefits of High-Value Investments Over $1 Million

The individuals most affected by these changes are high-income earners—those who previously capitalised on negative gearing by offsetting losses against income taxed at 47 cents to the dollar.

These are precisely the investors that Iconic aims to attract for construction projects.

A duplex or dual occupancy project with Iconic typically begins at $1 million for construction alone. This amount does not represent a standard project home price; it reflects a custom, architect-designed build featuring two fully independent dwellings tailored for the block and constructed for longevity.

At this price point, the tax implications become substantial. The rental income generated from two dwellings is considerable, enhancing the negative gearing advantage on a high-value build. The CGT position for a quality new build held over the medium to long term, particularly in a Brisbane market facing genuine supply constraints, looks promising.

This is not financial advice. Always consult your accountant for personalised guidance based on your individual circumstances. The overall case for a high-quality duplex or dual occupancy build in Brisbane has rarely been more compelling.

Understanding the Timeline and Its Critical Importance

This aspect often surprises investors.

The duration from your initial discussions with a builder to receiving the keys for a duplex or dual occupancy build typically spans at least 18 months. Design and approvals can take between 4 to 6 months, followed by construction, which generally lasts 10 to 14 months.

The new regulations will come into effect on 1 July 2027, which is only 13 months away.

Investors aiming to have a completed, tenanted new build prior to the regulatory changes may have already missed this window. The right perspective is this: those who wish to be strategically positioned under the new rules—with a qualifying new build underway or contracted—must make decisions promptly, rather than delaying for 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 must be completed in a sequential manner.

If you are serious about this opportunity, now is the time to discuss your plans. This is not about creating urgency; it’s about adhering to genuine timelines.

Identifying Suitable Investment Blocks in Brisbane

Not every block is appropriate for a duplex or dual occupancy build, and some locations are not conducive to investments of this nature. 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 significantly cheaper to build on compared to a steep one. Site costs for a sloping block can add between $50,000 to $150,000 or more to your overall project. Ensure to factor these expenses into your land purchase budget.

Location and demand: Areas such as the Redlands—including Cleveland, Thornlands, Victoria Point, and Capalaba—exhibit strong and consistent rental demand for well-designed dual occupancy and duplex properties. Investors must keep in mind that council rates in the Redlands are notably higher than those in the 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 areas within the Brisbane City Council, 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 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, while 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 →

Mastering the Construction Process for Investment Properties

The process of constructing a duplex or dual occupancy for investment purposes is not dramatically different from building 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 knowledgeable about construction finance, and your borrowing structure must reflect the understanding 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 result in 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 particularly important for investors compared to owner-occupiers. An independent architect or designer may create beautiful plans without considering 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 yield success, but understanding the differences is crucial:

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 allow.

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 discussions are essential 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 →

Clarifying Common Questions

Does a knockdown rebuild qualify for negative gearing under the new regulations?

Only if it increases the number of dwellings. For example, demolishing a single house and constructing 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 prior to 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 key 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 happen now. Your accountant can assess whether the tax implications make sense for your specific income and investment structure. Your builder can evaluate whether your block is suitable and if your budget is realistic for a qualifying new build. Each conversation is brief but informative.

Ready to Explore Your Investment Build Options?

If you are a Brisbane investor weighing your options following the budget changes and desire an honest conversation about what is feasible—including block viability, construction costs, timelines, and qualifying criteria—reach out to the team at Iconic Homes.

We construct across Brisbane, including Cleveland and the Redlands. We will inquire about your budget early on, provide a candid 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 →