The deposit for building a house is usually three different numbers, not one.
At Tailored Homes, one of the most common finance questions we hear is: how much deposit do I actually need to build? The confusion is understandable. Buyers often use one phrase to describe three separate cash requirements: the deposit on the land, the deposit or first payment under the build contract, and the total equity a lender wants across the whole project.
Those numbers overlap, but they are not the same thing. Over 16 years and 100+ homes across Canterbury, we have seen the misunderstanding show up everywhere from compact freehold townhouses in Wigram to larger standalone homes in Prebbleton and Halswell. We are builders, not mortgage brokers, so this guide is educational rather than personal financial advice. But mapping the cashflow properly before you apply usually makes the lender conversation far easier. It matters even in a lower-rate environment: the Reserve Bank of New Zealand (RBNZ) Official Cash Rate is 2.25% as of 18 February 2026, yet banks still test deposit, debt, and servicing separately.
- Land deposit: the amount due under the section sale and purchase agreement.
- Build deposit: the amount due under your building contract before or at the start of construction.
- Total project equity: the savings, KiwiSaver withdrawal, gifted funds, or existing land equity that supports the whole build from a lender’s point of view.
The key point is this: you do not usually add all three together as separate buckets. The land deposit and build deposit normally count toward your total project equity. The real question is what cash is due when, what the bank will fund, and what you must cover yourself.
Use this five-step method to calculate your real upfront cash.
- Separate the land deposit, the build deposit, and the lender’s total equity requirement.
- Read the land agreement so you know the deposit amount, the due date, and the settlement date.
- Read the build contract so you know the initial payment, progress-payment schedule, and excluded items.
- Add all non-deposit costs such as legal fees, valuations, consent costs, site investigations, and contingency.
- Check the full picture against lender policy, your income, and the build type you are choosing.
If you are still weighing the bigger question of building a house in NZ, this is one of the most important planning steps. Two homes with similar end values can require very different cash positions once timing and build structure are taken into account.
Start with the land deposit, because land usually creates the first hard cash deadline.
The land side is often the simplest part to identify. Under a normal section purchase, the sale and purchase agreement states the deposit amount and when it must be paid. Settled.govt.nz notes that property deposits are usually around 10% of the purchase price, although the exact percentage is negotiable and depends on the deal.
For example, a 10% deposit on a $350,000 section is $35,000. That payment is not your full land cost. It is the first instalment toward settlement. If the section settles later, the balance is paid on settlement day, typically with your loan plus your equity contribution.
What changes the land deposit calculation?
If you already own the land, the equity in that section can often count toward the project. If you are buying off-plan or buying a house and land package, the timing can look different again. In some projects the land settles first and the build starts later. In others, especially turnkey-style developer stock, you may sign one agreement and pay a single purchase deposit rather than managing a separate section settlement and construction facility yourself.
This is where build type matters. A smaller freehold townhouse in Wigram can have a very different cashflow profile from a standalone family home in Prebbleton on a 353m² or 500m² section. Larger land components generally mean larger deposit numbers, even before the build contract is considered.
Treat the build deposit as a contract question, not as shorthand for the whole finance position.
The build deposit is the amount your builder requires under the construction contract before substantial building work begins. That could be a small signing deposit, a preliminary payment for plans, engineering, or consent work, or a first stage claim once documentation is complete. It is often much smaller than the total equity a lender wants to see.
The Ministry of Business, Innovation and Employment (MBIE), through Building Performance guidance on residential building contracts, says residential building work costing $30,000 or more including GST must have a written contract. That contract should spell out the payment schedule, the amount of each payment, and when each payment falls due. If the contract is vague, default payment provisions can apply under the Construction Contracts Act, including monthly progress payments.
Why the build deposit varies so much
A true custom design-and-build usually has more front-end work than a completed developer product. You may have design, geotechnical, structural, consent, and specification decisions before the main build stages even begin. By contrast, if you buy a turnkey townhouse or completed new build from a developer, there may be no separate build deposit from your point of view because you are purchasing the finished product under one sale agreement.
This is one reason we encourage buyers to read a fixed-price contract very carefully. In our own work, clear inclusions and clear stage payments remove a lot of confusion before finance goes to the bank. If you are comparing a townhouse with a bespoke home, our guide on how to choose a custom home builder in Christchurch is a good companion read.
Your lender mainly looks at total project equity, and this is where most buyers underestimate the cash needed.
Total project equity is the big-picture number. It is the gap between the total project cost and the amount the bank is prepared to lend, plus any costs the bank will not fund. That equity can come from cash savings, KiwiSaver where eligible, gifted funds, or land you already own.
Imagine the full project cost is $800,000:
- Land: $320,000
- Build contract: $450,000
- Extra fees and setup costs: $30,000
If a lender wants 20% equity, the rough equity target is $160,000. If your land deposit is $32,000 and your build deposit is $15,000, those payments may count toward that $160,000, but they do not replace the need to have enough total equity to complete the project and cover excluded costs.
As of 2026, the RBNZ LVR rules allow banks to do only a limited share of low-deposit lending. For owner-occupiers, no more than 25% of new lending can sit above 80% loan-to-value ratio. For investors, no more than 10% can sit above 70% LVR. The same RBNZ guidance also says construction loans and newly built homes bought from a developer within six months of completion are exempt from those LVR restrictions. That exemption can help, but it does not force a bank to lend at a low deposit. Banks still apply their own credit policy.
Low-deposit buyers also need to understand that deposit is not the only hurdle. The RBNZ debt-to-income restrictions remain in place, and banks still run their own affordability tests. Eligible buyers may be able to use a Kāinga Ora First Home Loan with a 5% deposit, which is why our guide to how 5% deposit home loans work on new builds is worth reading. But a 5% deposit does not automatically mean a build will be approved.
Deposit expectations vary by lender and build type, even when the end value looks similar.
The reason many online articles blur this topic is that they mix together very different transaction types. In practice, the cash you need changes a lot depending on whether you are buying turnkey, doing house and land, or building fully custom on your own section.
Turnkey or off-the-plan townhouse
This is often the cleanest structure for buyers. You usually sign one purchase agreement, pay one deposit, and settle the balance on completion. The developer carries the build process and progress-payment management. That can make cashflow simpler, which is one reason turnkey townhouses appeal to first-home buyers. In our own pipeline, Four Seasons Estate in Wigram illustrates this difference well: a smaller freehold townhouse at 41 Deal Street is a very different finance conversation from funding a larger standalone build stage by stage.
House and land package
This usually sits in the middle. The land purchase and the build contract are connected, but not identical. You may settle the land first, then move onto a construction facility with progress payments. A practical example is the difference between a more compact Prebbleton home on a 301m² section and a larger four-bedroom home on a 500m² section. Even within the same suburb, deposit size, valuation approach, and contingency needs can change because the land and site costs change.
Custom build on your own section
This offers the most control, but it also tends to produce the most moving parts. Site-specific engineering, retaining, drainage, floor-area changes, and higher-spec design features can all affect the cash required before and during construction. We see this in projects where buyers want larger footprints, more complex rooflines, cathedral ceilings, or extensive landscaping. If you want the freedom of a bespoke design, make sure your finance plan allows for the fact that custom projects are often less plug-and-play than turnkey stock.
Budget beyond the deposit, because first-home buyers often miss the smaller items that still need real cash.
This is the part that catches people out. A buyer might have enough for the stated deposit, then discover the lender wants some costs paid separately or the contract excludes items they assumed were included. All building work in New Zealand must meet the New Zealand Building Code, and that compliance process creates real design, consent, and inspection costs.
- Legal and conveyancing costs: for the land purchase, the build contract, and the loan documents.
- Valuation and lender setup costs: some lenders want registered valuations or updated as-complete values.
- Council consent costs: in Christchurch, the Christchurch City Council 2025/2026 fee schedule shows a residential building-consent deposit of $6,500 for work valued over $500,000, with actual total costs finalised later.
- Development contributions: for some new builds or intensified developments, Christchurch City Council development contributions can apply. As of the 2025 policy, the district-wide charge is $3,483.16 including GST per household unit equivalent before any applicable catchment charges, although existing-demand credits can reduce this and like-for-like replacement may mean no contribution is required.
- Site investigations and engineering: survey, geotechnical reports, foundation design, stormwater, drainage, or retaining requirements.
- Excluded finish items: driveways, fencing, letterboxes, window coverings, landscaping, appliance upgrades, or utility connections if they are not included in the package.
- Contingency: a buffer matters, especially on projects with complex sites or bespoke specifications.
Not every project will have every one of these costs, and some fixed-price packages include far more than others. That is exactly why a cheap-looking deposit number can be misleading. Family support can also materially change the picture, which is why some buyers find our article on the Bank of Mum and Dad useful when thinking about total project equity rather than just deposit percentage.
Progress payments mean you do not usually pay the full build price upfront, but you do need to understand the timing.
Most construction projects are paid in stages, not in one lump sum. That is normal. The important part is to know what each stage covers, what evidence the bank wants before releasing funds, and how much time each drawdown may take.
- Initial deposit or preliminary stage: contract signing, design, engineering, or consent-related work.
- Foundation stage: slab, footings, or subfloor work.
- Frame stage: wall and roof framing.
- Lock-up stage: roof, cladding, windows, and external closure.
- Interior stage: services, insulation, linings, kitchen, and fit-out.
- Completion stage: final works, inspections, and handover-related payments.
The labels vary from one contract to another, but the principle is the same. The bank usually does not hand over the whole construction loan on day one. Instead, it releases funds progressively against invoices, inspections, or valuation updates. Construction lending also commonly means interest is charged on the amount drawn rather than the full approved limit, although every lender structures this differently.
This is another reason the phrase deposit for building a house can mislead. The upfront cash you need is only part of the story. You also need a contract and a lender structure that keep the build funded at each stage without leaving you short between claims.
You can strengthen your position before applying by making the project simpler, cleaner, and lower-risk for a lender.
Banks generally like projects that are easy to understand. A cleaner application can matter almost as much as a bigger deposit.
- Build a full project budget: include land, build, consent costs, professional fees, utility connections, landscaping, and contingency.
- Document your equity clearly: savings, KiwiSaver, gifted funds, and existing land equity should all be traceable.
- Reduce unsecured debt where possible: car loans, credit cards, and personal loans can weaken servicing.
- Prefer clear fixed-price documentation: a detailed inclusions list and payment schedule reduce uncertainty.
- Match the build type to your cashflow: turnkey is often simpler; custom can be worth it, but usually needs more planning.
- Keep the design realistic for the site and suburb: this helps with valuation and reduces overcapitalisation risk.
- Ask early what is excluded: fencing, driveways, window coverings, and landscaping are common traps.
If you are a first-home buyer, it also helps to review your finance options alongside your build options rather than treating them as separate decisions. A smaller townhouse, a fixed-price house and land package, and a bespoke family home can all be the right answer for different households, but they do not ask the same thing from your balance sheet.
FAQ: the short answers to common deposit questions.
Is the deposit for building a house the same as the land deposit?
No. The land deposit is only the upfront payment on the section purchase. The full build often also involves a separate build-contract payment structure and a larger total-equity requirement from the lender.
Can I build in New Zealand with a 5% deposit?
Sometimes, yes, but only in the right circumstances. Eligible buyers may qualify for low-deposit lending or a Kāinga Ora-backed First Home Loan, yet the lender will still assess income, debts, valuation, and the structure of the build.
Do progress payments come out of my own cash or the bank loan?
Usually both can be involved. The bank commonly funds approved build stages from a construction facility, while your own cash covers the equity portion and any excluded or non-funded costs.
What extra cash should first-home buyers keep aside beyond the deposit?
Allow for legal fees, valuations, consent costs, development contributions where applicable, site investigations, excluded finish items, and a contingency buffer. The exact list depends on the land, the contract, and whether the build is turnkey, house and land, or fully custom.
Does owning land already help?
Yes, often significantly. If you already own the section, the equity in that land can strengthen your overall project position and reduce the amount of new cash a lender wants to see.
Understanding the deposit for building a house is really about understanding the whole cashflow, not just one number on a brochure. If you want a practical upfront-cost map for your build, book a chat with Tailored Homes and we can help you outline the likely land costs, build payments, and extra cash items before you meet with a lender.
