Buying Off-The-Plan in NZ: The Timeline, Turnkey Mortgages, Sunset Clauses, and Hidden Risks
A quick heads-up before we dive in: This article is strictly for general informational purposes and does not constitute financial, legal, or tax advice. Every situation is entirely unique, and bank lending policies change frequently. Before making any decisions about your property journey, it is highly recommended that you seek independent advice from a qualified financial adviser.
Buying a house that doesn't exist yet feels like a leap of faith.
You look at glossy 3D renders, walk through a perfectly styled showroom, and sign a contract for a patch of dirt. In return, you get exemptions from strict Reserve Bank LVR rules (meaning you often only need a 10% deposit) and the promise of a warm, low-maintenance, brand-new home.
Most off-the-plan purchases in New Zealand are sold as "Turnkey" packages. The name literally means you don't do anything until you put the key in the door and turn it.
Unlike a "progress payment" build where you slowly pay the builder as different stages are completed, a turnkey contract requires a single deposit upfront. You pay absolutely nothing else—and you don't even start paying your mortgage—until the house is 100% finished and ready to live in.
But depending on what you buy, that wait could be three months, or it could be two years. To navigate the build safely, you need to understand the exact timeline of events, how bank valuations actually work, and when you can finally lock in your interest rates.
The Off-The-Plan Journey, Step-by-Step
The turnkey process follows a strict sequence of events. Whether your build takes a few months or a couple of years, this is the exact path you will follow from signing the contract to getting the keys.
The Turnkey Timeline
The exact process from signing the contract to the maintenance period.
We secure your initial bank pre-approval. You find an off-the-plan property you love and sign the Sale and Purchase Agreement (SPA), ensuring your solicitor reviews it thoroughly before it goes unconditional.
The bank usually requires a Registered Valuation based on the builder's plans. If you are using KiwiSaver for your deposit, your solicitor must initiate the withdrawal paperwork now. This confirms the property is worth what you are paying for it. Once the finance is approved, and your solicitor agrees, you pay your deposit (usually 10%) as per your solicitor's instructions.
If your build is likely to settle in the next 12 months, order your valuation at this stage. We have seen firsthand what happens when this goes wrong. A client came to us late in the process having purchased a turnkey home for $1,070,000. Just a month before settling, the valuation came back at $820,000!
The bank would only lend against the $820,000 value, ignoring the agreed purchase price. At this stage, they were legally locked in, liable for the full $1.07M, and it got very messy. A valuation received earlier, or a cleverly worded solicitor's registered valuation clause, would have saved this client a lot of stress and worry.
Had this happened before the client went unconditional, there may also have been the option to renegotiate the price based on a lower registered valuation than expected, or back out of the contract completely, depending on the specifics of the contract.
The developer builds the house. This could take three months, or it could take two years. Bank pre-approvals initially only last 60 to 90 days, but once we get to the stage where we're only waiting on council code of compliance, this can usually be extended out to 12 months. If the build is expected to take more than 12 months, we will work with you on how best to manage the process.
If the build faces massive delays and hits the "Sunset Date" written in your contract, usually 2-3 years from signing the contract, a legal trigger occurs. Depending on your contract, you may now have the legal right to cancel the agreement, get your 10% deposit back in full, and walk away.
As the house nears completion, the same valuer will revisit the now finished home. Unlike the first valuation, as it has not been more than 12 months since the original valuation, they are not deciding what the house is worth again. They are simply issuing a "Completion Certificate" to confirm the builder actually built what was on the original plans, thereby confirming that the original valuation was correct.
The local council issues the Code Compliance Certificate (CCC), proving the house is legally safe to live in. This is the critical moment: most banks will not let you officially lock in your fixed interest rate until the CCC or certificate of practical completion is issued, which means there is some risk when taking on a turnkey property that rates may have gone up before you settle. You must also arrange House Insurance now. The bank will not settle the loan without proof the property is insured.
The bank transfers the remaining 90% of the funds, your 10% deposit is released, and you get the keys. Your mortgage payments officially begin. Welcome to your new home!
After you move in, the New Zealand Building Act guarantees a 12-month defect repair period. You will create a "snag list" of issues (such as sticky doors, peeling paint, or faulty seals) for the developer to fix at their own expense.
The Valuation Rule: The 12-Month Window
One of the biggest sources of anxiety for off-the-plan buyers is the valuation process. Many buyers worry that if the property market drops during the build, the bank will re-value the house lower and refuse to lend them the money.
In a standard turnkey scenario, the bank relies on the Upfront Valuation completed from the builder's plans.
When the house is finally finished, the bank sends the valuer back out. As long as it has been less than 12 months since the original valuation, the valuer is not conducting a new market valuation to see what the house is worth today. They are simply issuing a "Completion Certificate" to verify that the developer built the exact house you promised to buy. If they built it to spec, the original valuation stands.
The Danger Zone: Delays and Valuation Shortfalls
The major financial risk occurs when the build is delayed significantly.
Because Registered Valuations generally expire after 12 months, a build that takes 18 months will force the bank to order a completely fresh market valuation right before settlement.
If the property market has dropped during that 18-month wait, the valuer might decide the house is now worth significantly less than the contract price you signed. The bank will only lend against this new, lower value, leaving you with a Valuation Shortfall. In this scenario, you are legally obligated to find that missing cash out of your own pocket to settle the house, or risk being sued by the developer for breach of contract.
This is why having an experienced mortgage adviser and solicitor is vital—we work together and track your valuation expiry dates and work with you to manage the risks if a build starts to drag on.
Using KiwiSaver for Your 10% Deposit
If you are a first-home buyer relying on KiwiSaver to fund your initial turnkey deposit, timing is everything.
You cannot simply log into your provider's app and transfer your KiwiSaver balance to the developer. The withdrawal must be legally facilitated by your solicitor, and it typically takes your KiwiSaver provider 10 to 15 working days to process the paperwork and release the funds.
This must be initiated before your contract goes unconditional. You need to ensure the cash is sitting ready in your solicitor’s Trust Account when the deposit is legally due, otherwise you risk breaching your contract right at the starting line.
The Last-Minute Hurdle: House Insurance
You have the CCC, you have agreed on a fixed interest rate with us, and you are ready for settlement day. But the bank holds the money back. Why? You forgot the insurance.
A bank will absolutely refuse to transfer settlement funds unless you provide a Certificate of Currency proving the house is fully insured. While the house was being built, the developer carried the construction insurance. But the moment the keys change hands, the liability becomes yours. You must arrange a standard house insurance policy to take effect on the exact day of settlement.
The Sunset Clause: Your Legal Shield
When you buy a house that hasn't been built yet, you need a guarantee that you won't be trapped waiting forever. This is what a Sunset Clause is for.
It is a specific date written into your contract (usually 2 to 3 years in the future). If the house is not finished and the title hasn't been issued by that date, the contract "sets with the sun." Depending on how the contract is written, you may have the legal right to cancel the agreement, take your 10% deposit out, and walk away.
Your solicitor will review this clause carefully before you go unconditional. Crucially, some contracts give the developer the right to cancel via the sunset clause too. If the market is booming, an unscrupulous developer could intentionally delay the build, cancel your contract, refund your deposit, and sell the finished house to someone else for a higher price. Your solicitor will ensure you are protected against this.
The Next 12-Month Snag List
Moving into a brand-new house doesn't mean it will be flawless. Over the first year, as the house settles and experiences different seasons, things can shift. Doors might start sticking, paint might crack, or a window seal might leak.
Under the New Zealand Building Act, new builds come with a mandatory 12-month defect repair period. During this time, the builder is legally obligated to fix any defects or "snags" at their own expense. We highly recommend keeping an ongoing snag list as you live in the property, submitting it to the developer before your 12-month window closes. (Note: This is separate from the 10-year implied warranties that cover major structural issues).
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