Thinking of building your own home in New Zealand?

Last reviewed: 25 September 2026

Financing a build works differently from buying an existing house. Most lenders want a fixed-price build contract. The money is paid in stages, not one lump. And the deposit is often based on the land, not the whole project. New builds are also exempt from the Reserve Bank’s loan-to-value (LVR) limits, which is why some people can build with a smaller deposit than they’d need for an existing home.

Below I’ve set out how construction loans in NZ generally work, what lenders look at, and the contract points I’d want sorted before you sign. It’s general information, and every lender has its own policy. If you’d like to talk through your own project, book a free chat with me.

How construction loans work in NZ: the short version

• Fixed-price contract: most banks and non-bank lenders want one before they’ll approve build lending.
• Two common structures: turn-key, where you pay the balance when the home is finished. Or progress-payment, where you buy the land and pay the builder in stages.
• Deposit: lenders often look for around 20% of the land price. On some projects that works out to roughly 10% of the total cost.
• During the build: progress-payment loans are usually interest-only until the home is finished.

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Step 1: Finding a section and a builder

Finding land is often the hardest part, especially somewhere like Auckland. The bigger building companies take up a lot of the available sections and sell them as house-and-land packages. You can still buy bare land if you’d rather use your own builder.

Check any builder out properly before you commit. Social media horror stories only tell you so much. Look for reviews from sources you trust and talk to people who have built with them recently. You’ll be dealing with this builder for months, so you want one who is good at the work and good at keeping you informed.

Step 2: Designing a home that fits your budget

Most people start with a picture of their ideal home and then have to squeeze it into a budget. I usually suggest splitting the wish list into what you need now and what can be added later. Put the money into the structure and into things that are hard to change down the track, like layout, insulation and window placement. After all, you can upgrade the benchtop in five years. Moving a wall is a different story.

The larger building companies tend to have pre-designed plans with detailed specifications, which make it easier to see what your money gets you. Smaller builders can be just as competitive on price. They often give you more flexibility and a more personal service, which can suit a custom design.

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Step 3: Getting the build contract right

Once the land and design are sorted, the next jobs are reviewing the build contract and arranging finance. Most lenders want a fixed-price contract. It gives them certainty on cost, and it usually comes with a completion guarantee.

A fixed-price contract lists the materials and products that will be used. Read it carefully and make your changes before you sign, because changes get harder and dearer later. Many contracts include prime cost (PC) sums. These are allowances for items like foundations, kitchens and electrical fittings. Check they’re realistic. In my experience a PC sum set too low is one of the most common reasons a build goes over budget.

Things worth negotiating before you sign

• More free variations. Contracts often allow only a couple of changes at no cost. You can ask for more before you sign the build agreement.
• A start and finish date. This gives you some protection from long delays, particularly on house-and-land packages.
• A sunset clause on turn-key builds. This sets a firm deadline, so the build can’t drag on indefinitely or the price creep up before settlement.

None of these are big asks, but they can save you a lot of time, money and stress. Have your lawyer review the contract before you sign.

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Turn-key vs progress payments: which structure suits you?

Turn-key build

You pay a deposit upfront and the balance when the home is finished and ready to move into. It’s simpler, because you make no payments during the build. The trade-off is that the builder is funding construction, so the overall price can be higher.

If you’re a first-home buyer with a small deposit, it’s also worth knowing about the Kāinga Ora First Home Loan. It’s offered through participating lenders and underwritten by Kāinga Ora, and eligible buyers can get in with a 5% deposit. Income caps and lender criteria apply. Kāinga Ora says some participating lenders may let you use a First Home Loan to build a new home, so it’s a question to ask the lender before you commit to a particular build structure.

Progress-payment build

You buy the land first, then pay the builder in stages as the work is done. This is the more common structure. The loan is usually interest-only during the build. Because you’re funding the build yourself, the price usually carries less of the builder’s finance cost, so it can work out cheaper. You also often have more room to make changes. The catch is that you’re carrying the land and the loan while the house goes up, so your cash flow has to cope with that.

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How much deposit do you need to build a house in NZ?

Many lenders look for a minimum 20% deposit on the land. Say the land costs $350,000 and the build costs $350,000. You’d typically need about $70,000 upfront. That’s 20% of the land price, but only 10% of the $700,000 total.

The reason this can work is the Reserve Bank’s construction exemption. Two types of lending are exempt from the LVR restrictions: building a new home, and buying a new home from the developer within six months of completion. This lending doesn’t count towards the banks’ low-deposit limits. It doesn’t cover extensions to an existing home. The exemption doesn’t oblige a bank to lend, though. Banks still apply their own criteria and can set their own maximum LVR on construction loans. That’s why some lenders will accept a 10% deposit on the total project. Others won’t, and your income still has to support the full loan.

For a first look at the numbers, use the mortgage calculator or my how much can I borrow guide. If your deposit is on the smaller side, my low deposit home loans page explains the options.

Construction loan discounts and cashbacks

Some banks run offers on new-build lending, such as rate discounts on construction loans or cashback towards upfront costs. They change often and come with conditions, so I don’t list them here where they’d go out of date. I’ll check what’s on offer when we look at your project. The cheapest-looking offer isn’t always the best fit for how your build is set up.

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Managing your own build (self-managed or owner-builder)

Some people buy land and run the project themselves, hiring each trade directly instead of using a main contractor. You get more control and possibly some savings. It’s also a lot more complicated, and things can go wrong quickly.

When you build through a main contractor, you can usually get a builder’s completion guarantee, which covers you if the job goes off track. Manage it yourself and you generally don’t have that protection, so overruns come out of your pocket. That’s why banks are often wary of self-managed builds that don’t have a fixed-price contract or a detailed project plan. It’s harder, but it isn’t impossible.

If you plan to project-manage your own build, have these ready:

• a full budget backed by quotes from qualified trades
• a timeline and build schedule showing the main milestones
• evidence that your main contractors (builder, electrician, plumber and so on) are licensed and insured.

I can help you put the application together so a lender sees a well-planned, lower-risk project. For non-standard or self-managed builds, that presentation often makes the difference.

If you’re building more than one home, such as a small development or subdivision, that’s development finance rather than a standard construction loan. You can check where your project sits with my development finance pre-qualification tool. If you’re building to rent, my property investment loans page covers how lenders look at investors.

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Why the right construction finance matters

Construction lending has its own rules, and not every bank staffer or broker does much of it. The wrong structure can cost you. It can mean extra fees, drawdowns that don’t line up with the builder’s invoices, or cash-flow pressure halfway through the build.

I work with a panel of banks and non-bank lenders, so I can match your build to the right lender. That applies whether it’s your first home, a turn-key package or an investment build. You can see everything I can help with here. If you’re a first-home buyer, start with my first home buyers guide.

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Frequently asked questions

Can I get a construction loan with a 10% deposit in NZ?

Sometimes, yes. Lending to build a new home is exempt from the Reserve Bank’s LVR restrictions, so some lenders will accept a deposit of around 10% of the total project. Many still want about 20% of the land price. Whether you qualify depends on the lender, the contract and your income.

Do I pay interest while my house is being built?

With a progress-payment build, yes. You usually pay interest-only on the amount drawn down so far, and the loan grows as each stage is paid. With a turn-key build you usually pay a deposit upfront and settle the balance when the home is finished, so there’s typically no loan to service during construction.

Do banks need a fixed-price build contract?

Most banks and non-bank lenders do, because it gives them certainty on cost and usually includes a completion guarantee. Self-managed builds without one are harder to finance, but it can still be possible with a detailed budget, quotes and a build schedule.

Is turn-key or progress payment cheaper?

Progress payments often work out cheaper, because the builder isn’t funding construction and pricing that cost in. Turn-key is simpler and involves no payments during the build. Which suits you depends on your cash flow, your deposit and the contract itself.

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Ready to talk about your build?

Building a new home takes planning, but with the right finance structure behind it the process is a lot less stressful. Maybe you have land in mind or a contract to review. Or perhaps you’re just starting to price things up. Either way, book a free chat with me or get in touch here.

Sources

• Reserve Bank of New Zealand, Loan-to-value ratio restrictions
• Kāinga Ora, First Home Loan

This article is general information only and is not personalised financial advice. It does not take account of your objectives, financial situation or needs. Lender policies, Reserve Bank settings, government schemes and offers change regularly. All lending is subject to each lender’s own criteria and approval. Details of our services and fees are set out in our Disclosure Statement.