Buying Off the Plan in Australia: Risks, Benefits & What to Check

14 March 2026|6 min read

A comprehensive guide to buying off-the-plan property in Australia. Covers stamp duty savings, sunset clause risks, developer insolvency, valuation gaps, and cooling off periods by state.

Stamp duty savings on off-the-plan purchases

One of the most significant financial advantages of buying off the plan is the potential stamp duty saving available in most states. When you purchase a property before construction is complete, several states allow you to pay stamp duty on the land value (or the value of work completed at contract date) rather than the full completed purchase price. In NSW, the off-the-plan concession means duty is calculated on the land component only if construction has not yet commenced. On a $750,000 apartment where the land value is $300,000, you would pay approximately $8,990 in duty instead of $29,000 — a saving of $20,010. Victoria offers a similar concession, and Queensland provides relief through its home concession for owner-occupiers. The savings are most substantial for high-rise apartment developments where the building component represents 50% to 70% of the total price. However, the rules vary by state and can change in budget announcements, so always confirm the concession applies to your specific purchase. Note that this concession is available to both owner-occupiers and investors in most states, making it one of the few stamp duty benefits available to property investors.

Sunset clause risks: how developers can walk away

A sunset clause in an off-the-plan contract sets a deadline by which the developer must complete the project and settle. If construction is not finished by the sunset date, either party can rescind (cancel) the contract. Originally designed to protect buyers, sunset clauses have been exploited by some developers to cancel contracts when property values have risen significantly since the original sale — allowing them to resell at higher prices. For example, if you contracted to buy an apartment for $600,000 in 2023 and the market has risen to $750,000 by the sunset date in 2026, a developer has a $150,000 incentive to deliberately delay and trigger the sunset clause. Several states have responded with legislative protections. In NSW and Victoria, developers now need buyer consent or a Supreme Court order to invoke a sunset clause, preventing opportunistic cancellations. In Queensland, protections are less comprehensive. When buying off the plan, negotiate the longest possible sunset period (3 to 5 years is common), ensure the contract requires the developer to obtain your consent before rescinding under the sunset clause, and check your state's consumer protection laws with a property solicitor before signing.

Developer insolvency: what happens if the builder goes bust

Developer insolvency is one of the most serious risks of buying off the plan, and it has become more prevalent in 2024-2026 as construction costs have surged and profit margins have compressed. If a developer enters administration or liquidation during construction, your project may be delayed by months or years, the quality of the finished product may suffer if a new builder takes over with a reduced budget, or in the worst case, the project may be abandoned entirely. Your deposit is at risk depending on how it was held. In most states, deposits must be held in a trust account or with a deposit guarantee — meaning your money should be recoverable even if the developer fails. However, this is not always the case, and recovering funds from an insolvent entity can take years. To mitigate this risk, research the developer's track record by checking completed projects, ASIC company records, and any history of litigation. Look for established developers with multiple completed projects rather than single-project entities. Ensure your deposit is held in a statutory trust account by the developer's solicitor — not in the developer's own operating account. Consider deposit bond insurance as an alternative to cash deposits.

Valuation shortfall risk: when the bank values it lower

Valuation shortfall is the risk that when your off-the-plan property is completed and you apply for final loan approval, the bank's valuer assesses the property at less than your contract price. This creates an immediate problem: if you contracted to buy at $700,000 with an 80% loan ($560,000) and a $140,000 deposit, but the bank values the property at $650,000, the maximum loan at 80% LVR is $520,000 — leaving a $40,000 gap you need to fill from savings, additional borrowing, or LMI. Valuation shortfalls are common in off-the-plan purchases because the contract is signed 1 to 3 years before settlement, and market conditions can change significantly in that period. Oversupply in apartment markets (common in inner-city Melbourne and Brisbane CBD) can depress valuations, as can rising interest rates that reduce buyer demand. To protect yourself, avoid paying above market value at the time of contract by researching comparable recent sales, be cautious of developments with hundreds of apartments launching simultaneously (oversupply risk), maintain additional savings beyond your deposit as a buffer, and consider obtaining an independent valuation before signing if possible.

Contract review essentials: what your solicitor should check

Never sign an off-the-plan contract without having it reviewed by an experienced property solicitor or conveyancer — the complexity and risks far exceed those of a standard property purchase. Key items your solicitor should check include: the sunset clause terms and whether the developer can rescind without your consent, the deposit structure (trust account vs guarantee), the finish schedule and specifications (exactly what materials, fixtures, and finishes are included), provisions for variations (can the developer change the floor plan, size, or finishes without your approval?), the defects liability period (typically 6 to 12 months after completion), the dispute resolution process, any developer contributions to strata or body corporate that expire after the first year (which can cause strata levy spikes), title registration details and any easements or covenants, and the developer's obligations around common areas and facilities. Your solicitor should also explain your cooling off rights and any conditions under which you can terminate the contract if circumstances change. Budget $1,500 to $3,000 for a thorough contract review — this is money well spent given the amounts at stake.

Cooling off periods by state: your right to change your mind

Most Australian states provide a statutory cooling off period for off-the-plan purchases, during which you can withdraw from the contract with limited financial penalty. In NSW, the cooling off period is 10 business days from exchange, and if you withdraw, you forfeit 0.25% of the purchase price. Victoria provides a 3 business day cooling off period with a penalty of up to $100 or 0.2% of the purchase price. Queensland offers 5 business days with a 0.25% forfeiture. South Australia provides 2 business days with no penalty, and Western Australia has no statutory cooling off period for private sales but provides cooling off for some off-the-plan contracts. ACT provides 5 business days. Importantly, cooling off rights can be waived in some states (such as NSW, where a Section 66W certificate issued by your solicitor waives the cooling off period) and are automatically excluded for properties purchased at auction. Off-the-plan developers sometimes request buyers to waive cooling off rights — be very cautious about agreeing to this, as it removes an important consumer protection. If you need more time to consider the purchase, negotiate an extended cooling off period as part of the contract terms rather than waiving it entirely.