Building Over Buying: Brisbane Investors’ 2026 Preference

If you are an investment property owner in Brisbane, you will likely recognise that the property investment landscape has experienced considerable transformations. The 2026 Federal Budget, revealed on 12 May, has introduced significant changes that will influence your strategy regarding property investments from that date onwards.

In essence, acquiring an established investment property after this date will mean forfeiting the benefits of negative gearing beginning on 1 July 2027. Conversely, if you choose to develop new properties, you will continue to enjoy this advantage. This change is a direct result of government policy aimed at boosting the supply of new housing. The government is actively promoting new builds, which come with tax benefits, whereas established properties will no longer benefit from these incentives.

For investors who have traditionally focused on buying and holding established properties, this represents a pivotal strategic shift. If you are currently assessing your next investment opportunity, the emphasis on developing new properties has never been more critical.

Explore the Key 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 your expenses—including mortgage interest, rates, insurance, and maintenance costs—you were able to offset those losses against your overall income, thereby reducing your tax liability. This mechanism was well understood by most investors and played a crucial role in shaping their investment strategies.

From 1 July 2027, this offset will be applicable only to new constructions. If you purchase an established property after 12 May 2026, your rental losses will only offset against other property income. This means you will no longer be able to decrease your taxable income derived from salary or other investments. The attractive tax benefits that made negatively geared properties appealing to higher-income earners will be eliminated for existing stock.

In contrast, new builds will continue to offer the full benefits of negative gearing. Investors in new constructions can choose between a 50 percent capital gains tax (CGT) discount or opting for cost base indexation upon sale, depending on what aligns best with their financial situation.

For high-income individuals contemplating their next investment, the post-tax financial implications of new builds versus established properties have shifted significantly. If you have not yet consulted your accountant regarding these changes, make that discussion a priority.

Defining the Criteria for New Builds

Understanding the specifics is essential.

The government's criteria for an eligible new build are explicit: the property must contribute to increasing the housing supply. This encompasses:

• A dwelling constructed on vacant land qualifies. If it is a new build on an empty plot, it meets the criteria.
• A duplex or dual occupancy resulting from a knockdown rebuild qualifies, provided you are replacing one dwelling with more than one. For example, demolishing a single house and constructing a duplex increases supply and satisfies the requirements.
• However, a knockdown rebuild that replaces one house with another single house does not qualify. The government documentation clearly 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 implications for Brisbane investors are clear: if you own a significant block and are considering your next steps, opting for a duplex or dual occupancy instead of a single dwelling is now a crucial decision. It determines whether your build qualifies as a new build under the current regulations.

Examining the Appeal of High-Value Investments Over $1 Million

The individuals most impacted by these changes are high-income earners—those who previously leveraged 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 commences at $1 million for construction alone. This is not a standard project home price; it represents a custom, architect-designed build featuring two fully independent dwellings specifically tailored for the block and built to last.

At this price range, the tax implications become significant. 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, especially in a Brisbane market facing genuine supply constraints, is promising.

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

Recognising the Timeline and Its Critical Importance

This aspect often takes investors by surprise.

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 eager to have a completed, tenanted new build before the regulations change 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 now, rather than waiting six months.

You need to identify or already own the land. Your financing must be arranged. A feasibility assessment of what can be built is essential. Each of these steps requires time and must be completed sequentially.

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 suitable for a duplex or dual occupancy build, and some locations may not support 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 critical—some zones permit dual occupancy, while others do not. Conducting a feasibility assessment prior to purchasing land is essential.

Slope: A flat or gently sloping block is considerably 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 should note that council rates in the Redlands are significantly higher than those in the Brisbane City Council. This difference can accumulate on a dual occupancy or duplex and must be included in your financial assessments before acquiring a block.

For investors focusing on areas within the Brisbane City Council, medium-density suburbs such as Wynnum, Manly, Carindale, Bulimba, Cannon Hill, Camp Hill, Morningside, and Coorparoo are currently where the opportunities lie. These locations offer robust 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 comprehensive breakdown of the costs associated with building in Brisbane, refer to our 2026 custom home cost guide →

Navigating the Construction Process for Investment Properties

The process of constructing a duplex or dual occupancy for investment purposes is not significantly 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 lead to two dwellings that feel subpar, which tenants will notice. Thoughtful design results in 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 beneficial.

Fixed-price contracts are essential. For an investment build, a fixed-price contract is crucial. It is what your lender will require 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—before 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, resulting in 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 →

Evaluating Dual Occupancy Versus Duplex for Investment Success

Both options can yield success, but understanding the differences is essential:

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 allow, how does the local rental market respond, and what is the optimal strategy—maintaining both dwellings on one title or subdividing for potential separate sale or financing flexibility later? These discussions are vital 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 Frequently Asked 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 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 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 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?

Generally, 600 square metres is required under the Brisbane City Plan 2014, but zoning and overlays also play a role. Some zones do not allow dual occupancy regardless of block size. A feasibility assessment of your specific block prior to purchase is vital.

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 assess whether the tax implications make sense for your particular 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.

Are You Ready to Discuss Your Investment Build?

If you are a Brisbane investor contemplating your options following the budget changes and wish for 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 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 →