Building Over Buying: Brisbane Investors’ 2026 Preference

If you are an investment property owner in Brisbane, you are likely aware that the property investment landscape has undergone substantial changes. The 2026 Federal Budget, revealed on 12 May, has introduced significant alterations that will reshape how you approach property investments from that date forward.

To summarize, acquiring an established investment property after this date will mean that you will forfeit the negative gearing benefits starting from 1 July 2027. Conversely, if you choose to construct new properties, you will retain this advantage. This change is not a loophole; it is a direct result of a governmental policy aimed at boosting the supply of new housing. The government is actively promoting new builds, which come with tax benefits, while established properties will lose these perks.

For investors who have traditionally focused on purchasing and holding established properties, this represents a major shift in strategy. If you are currently contemplating your next investment decision, the emphasis on constructing new properties is now more relevant than ever.

Explore the Essential Changes in Property Investment Regulations

Before 12 May 2026, the mechanism of negative gearing applied uniformly to both new and established properties. If your rental income fell short of your expenses — which include mortgage interest, rates, insurance, and maintenance costs — you could offset those losses against your overall income, thereby minimizing your tax liability. Most investors understood this mechanism and it significantly influenced their investment strategies.

However, starting from 1 July 2027, this offset will only be applicable to new builds. If you purchase an established property after 12 May 2026, your rental losses will only be offset against other property income. This means that you will no longer be able to reduce your taxable income 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 retain the full advantages of negative gearing. Investors in new builds can choose between a 50 percent capital gains tax (CGT) discount or opting for cost base indexation upon sale, depending on what best suits their financial circumstances.

For high-income individuals considering their next investment, the post-tax financial implications of new builds versus established properties have shifted dramatically. If you have not yet spoken to your accountant about these changes, make it a priority to initiate that conversation.

Clarifying What Constitutes a New Build

This is where the details become critically important.

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

• A dwelling constructed on vacant land is eligible. If it is a new construction on an empty block, it qualifies.
• A duplex or dual occupancy resulting from a knockdown rebuild qualifies, as long as you are replacing one dwelling with more than one. For example, knocking down a single house and building 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 implications for Brisbane investors are unmistakable: if you own a sizeable 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.

Examining Why High-Value Investments Over $1 Million Are Especially Appealing Now

The individuals most affected by these changes are high-income earners — those who previously enjoyed the benefits of 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 $1 million for construction alone. This is not a standard project home price; it reflects a custom, architect-designed build featuring two fully independent dwellings that are 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 facing genuine supply constraints, is promising.

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

Recognizing the Timeline and Its Critical Importance

This is the aspect that often surprises investors.

The time from your initial discussion with a builder to receiving the keys for a duplex or dual occupancy build is typically at least 18 months. Design and approvals alone 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 before the regulations change have likely already missed this window. The right perspective is this: those who want 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 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, the time to discuss your plans is now. This is not about creating urgency; it’s about adhering to genuine timelines.

Discovering 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 of 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 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 — show 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 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 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 Build 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 organized 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 minimize 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 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 →

Understanding the Comparison Between Dual Occupancy and Duplex for Investment Success

Both options can achieve 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 are essential discussions to have with your builder and accountant before finalizing designs.

For an in-depth analysis of dual occupancy options in Brisbane and the Redlands, visit our dual occupancy page →

Frequently Asked Questions 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 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.

Ready to Discuss Your Investment Build?

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