A custom build is usually funded through a construction loan rather than a standard home loan paid out in one lump sum. The lender normally approves the land purchase and the proposed build, then releases money in progressive drawdowns as work is completed. You pay interest on the amount drawn, not the full approved loan from day one. Before buying a section, you need a realistic budget for the land, house, site works, professional fees, council charges, finance costs, and a sensible contingency. A mortgage broker, your designer, and your custom home builder in Queenstown should be involved early. We can explain the build cost and contract side, but we do not provide financial advice.
What is a construction loan in New Zealand?
A construction loan, sometimes called a building loan or construction mortgage, is set up for a house that does not exist yet. The bank cannot treat the proposed home in the same way as a finished property, so it looks at the whole project:
- Your income, debts, deposit, and credit history
- The value and condition of the section
- The plans, specifications, consent position, and build contract
- The expected value of the finished home
- The total amount required, including fees and a contingency
- The builder’s experience and the way the contract is structured
A normal mortgage often settles against an existing home. A construction facility is drawn in stages. The bank or its valuer wants to see that the money is being used for the project and that the value of the work supports the lending as the house takes shape.
The exact lending policy belongs to the lender. Interest rates, loan to value requirements, serviceability tests, valuation rules, and acceptable contract types change. Talk to a registered mortgage adviser or your bank before making a financial commitment.
How progressive drawdowns work
A progressive drawdown mortgage releases funds as agreed stages are reached. The stage names differ between lenders, but the pattern is usually similar.
| Build stage | What may happen | What the lender may ask for |
|---|---|---|
| Land settlement | The section purchase settles, if the loan includes land | Sale and purchase agreement, valuation, lending approval |
| Preliminaries and foundations | Site preparation, excavation, drainage, reinforcing, and concrete work begin | Builder claim, inspection, invoices, or progress evidence |
| Framing and enclosed shell | Framing, roof, windows, and external doors are installed | Progress claim, inspection, updated valuation if required |
| Services and internal work | Plumbing, electrical, linings, insulation, joinery, and heating progress | Claim and evidence that the project remains on budget |
| Practical completion | Finishes are completed and the house is ready for final checks | Final claim, code compliance information, valuation, or insurance evidence |
The bank generally pays the builder, or reimburses costs, according to its own process. Do not assume that a builder’s claim date and the bank’s drawdown date are the same. Ask the lender how much notice it needs, whether it pays suppliers directly, and what happens if a claim is queried.
Progress payments matter to us on site. A delay in funding can hold up subcontractors, deliveries, and the next stage of work. Put the lender’s drawdown process beside the construction programme before work starts. Our Queenstown build timeline explains the wider sequence and why a few days here and there can have a real effect on a project.
Line up the bank’s drawdown process with the build programme before the first claim goes in, not after it.
Do you pay interest during construction?
Yes. In most cases, you pay interest on the funds that have been drawn. Early in the build, that may be only the amount used for the land or initial works. As more of the loan is drawn, the interest cost rises.
Some lenders offer an interest only period during construction or for a short period after completion. That can help with cash flow, but it does not make the interest disappear. The loan still needs to be serviced, and the arrangement may change when the house is finished. Ask for a written explanation of:
- The interest rate during each stage
- Whether the facility is interest only or principal and interest
- When repayments change
- Any establishment, valuation, drawdown, or line fees
- Whether unused approved funds attract a charge
- How variations affect the approved limit
We recommend keeping a separate allowance for interest and rent. A family may be paying rent while also paying interest on a partly drawn facility. If the build takes longer than expected, that overlap lasts longer too.
How much deposit do you need to build a house in NZ?
There is no single deposit figure for every construction loan. The required contribution depends on the lender, your income, the value of the land, the cost of the work, and the finished value. A lender may count usable equity in another property as part of your contribution, subject to its assessment.
For early planning, use the full project cost rather than assuming the section deposit is the only cash required. A Queenstown custom home can commonly sit around $6,500 to $9,500 or more per square metre (including professional fees, building consent and standard site works), depending on the site, design, specification, access, and finish. A 220 square metre home at those rates gives a build allowance of roughly $1.43 million to $2.09 million before some project specific costs are added.
When the land, development contributions, finance costs, landscaping, furnishing and contingency are added to the build cost, total project budgets can reach $1.5 million to $2.5 million or more depending on house size, specification and section price.
Those figures are not a quote. They are a reason to test the numbers early. Read our custom home cost guide for Queenstown and ask for a site based feasibility check before you commit to a section or a house size.
Our blunt view: if the land only works on the best case build budget, the land does not work.
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Can you get a mortgage to buy land and build a house?
Yes, a lender may structure a land and build loan, but approval depends on the whole proposal. Some buyers purchase the section first and arrange construction finance later. Others apply for the land and house as one project. The second route can make the total plan clearer, provided the plans, costing, contract, and lending approval are ready.
Buying land first can create a gap between the section loan and the construction loan. You may begin paying interest while the design is still being developed, resource consent is being considered, or the building consent is being prepared. If you already own a home, bridging finance may be discussed, but it carries its own risks and costs. A broker can compare structures and explain the lender’s conditions.
Do not sign an unconditional land contract on the assumption that construction finance will be easy later. Make the finance conditions, due diligence, and builder feasibility review part of the decision. A section with a steep drive, difficult ground, service restrictions, or strict covenants may be financeable, but not at the budget you first imagined.
What documents will the bank want?
The list varies, but a lender will commonly want enough evidence to understand both the people and the project. That can include:
- Identification, income, tax, debt, and deposit information
- The section sale and purchase agreement
- A title, LIM, and relevant property information
- Architectural drawings and a specification
- Building consent information, when available
- A fixed price building contract from an acceptable builder
- A payment schedule and construction programme
- A valuation based on the completed home
- Details of insurance and guarantees, where relevant
- Evidence of the contingency and how cost increases will be handled
This is one reason we encourage clients to speak to a broker before their design is too far advanced. If the lending limit is lower than expected, changing the house at concept stage is far less painful than cutting it after consent, engineering, and detailed pricing have been completed.
Why a fixed price contract helps
A fixed price contract gives the lender a clearer picture of the amount required. It also gives the client a clearer boundary around the main construction cost. It is not a promise that every cost in a building project is fixed. Site conditions, client variations, council requirements, provisional sums, and work outside the contract still need to be understood. Our guide to fixed price vs cost plus contracts covers how each contract type allocates risk.
Before signing, check:
- Exactly what work and products are included
- The allowances for kitchen, bathroom, flooring, heating, lighting, and appliances
- Any provisional sums and prime cost items
- Site works, retaining, rock excavation, and service connections
- Landscaping, fencing, driveways, and external stairs
- Council fees, development contributions, and utility charges
- The process for approving variations
- The timing and amount of progress claims
- The insurance and dispute provisions
A low headline price with large allowances is not the same as a well priced build. We would rather identify an awkward site item before the contract than discover it when the excavator is already on the driveway.
How does Ferguson Builders help you get finance ready?
Our 8-step process is built to settle the expensive questions early. Step 4, comprehensive costing and timeline planning, is where we test the design against current pricing, lead times, trade availability, and site conditions. For finance, that matters because your broker and lender are working from a costed scope and a realistic programme, not a hopeful square metre rate.
Step 7 gives you visual progress updates through photos and walkthrough videos tied to milestones. That helps if you are keeping track of the build and the lending from outside Queenstown.
If you want the lowest headline price, we are probably not the right fit. If you want straight answers on cost, programme, and contract before you commit, you will likely feel at home with us.
QLDC charges and the cost people forget
Queenstown Lakes District Council development contributions can apply when development creates demand for council infrastructure. The amount and timing depend on the project and the council’s current policy. They are separate from the builder’s price unless the contract specifically says otherwise.
Ask your designer, planner, and council what may apply to your proposal. Allow for development contributions, building consent fees, resource consent costs where required, inspections, service connections, and other authority charges. Confirm when each payment is due. A charge that lands before a consent is issued or before a connection is made can affect your cash flow and your progressive drawdown plan.
How to avoid holding cost blowouts
Holding costs are the expenses that continue while the project is being designed, consented, built, and completed. In Queenstown, this can include rent, interest on land, rates, insurance, storage, temporary accommodation, and travel if you are living elsewhere.
We control what we can by getting the early decisions in the right order:
- Confirm the section, title, access, services, and site constraints.
- Get a realistic concept and cost check before detailed design.
- Ask the lender and broker what documents are needed for approval.
- Set a realistic consent and construction programme.
- Price the actual specification, not a vague square metre promise.
- Keep a contingency that is not spent on upgrades at the start.
- Order long lead items at the right point in the programme.
- Decide variations quickly and fund them before they hold up work.
The finance problem that causes the most stress is not a sudden bank refusal. It is a project that starts with no allowance for the difficult parts. A rock excavation, imported retaining system, delayed joinery decision, or late client change can consume the cash that was meant to cover rent and interest.
Your contingency is there for the difficult parts of the build, not for upgrades at the start.
When should you engage a mortgage broker?
Engage a broker before you buy the land, or at least before the land contract becomes unconditional. This is especially important if you are self employed, have more than one income source, own another property, are carrying a construction loan already, or need to combine savings and equity.
The broker can explain borrowing capacity and lender requirements. Your builder can test the site and build cost. Your designer can develop a home that fits the section and the brief. These are different jobs, but they need to agree before you commit.
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Construction loan compared with other paths
| Option | Finance and cost question | What to check |
|---|---|---|
| Land and custom build | Can the lender approve the total project and progressive drawdowns? | Site cost, contract, programme, contingency |
| House and land package | Which items are included in the advertised package? | Titles, upgrades, site works, specification, settlement timing |
| Pre-built (panelised) home | Is the construction method accepted by the section covenant and lender? | Panel delivery, foundations, services, consent, warranty, site access |
| Buy an existing home | Does the property need work after purchase? | Immediate repairs, valuation, insurance, renovation finance |
Read our guides to house and land package costs in Queenstown and pre-built home costs before deciding that one route is automatically cheaper.
Frequently asked questions
How does a construction loan work in New Zealand?
The lender approves a total facility based on you, the land, the build cost, and the expected finished value. Funds are then released in stages as the work progresses. You generally pay interest on the amount drawn. The lender’s conditions and process are specific to that bank, so obtain the details in writing.
What deposit do I need to build a house in NZ?
There is no universal deposit. Your required contribution depends on the lender’s policy, your equity, income, debts, the land value, and the total project. Build a budget around the full cost, not only the deposit required to secure the section.
Do construction loans have progressive drawdowns?
Most construction facilities use progressive drawdowns. The lender releases money at agreed stages, often after a claim or inspection. Ask how much notice is needed and whether the lender pays the builder directly.
Do you pay interest during construction?
Usually, yes. Interest normally applies to the amount already drawn. The balance rises as more funds are released. An interest only period may help cash flow for a time, but it remains a cost and does not remove the loan principal.
Can I get a mortgage to buy land and build a house?
A lender may approve a combined land and build facility, subject to its assessment. The project will need a credible budget, plans, contract, valuation, and evidence that you can service the loan. Get advice before signing the land contract.
What happens if the build costs more than the loan?
You may need to fund the difference, reduce the scope, or seek further approval from the lender. This is why the contract, allowances, site assessment, and contingency need to be checked before work begins. Do not assume the bank will increase the facility after an overrun.
Our view
Finance should be sorted before the excavator arrives, not while it is waiting on the driveway. Get a broker involved early, understand the full Queenstown site cost, and use a fixed price contract with clear allowances. Most importantly, do not buy land until you know what it is likely to cost to build there.
If you have a section or are assessing one, get in touch through our contact page. We can talk through the site, likely construction approach, programme, and the information you will need before taking the next step.