# HL-Q056: Borrower journey We own land and have chosen a builder for our home. How does a mortgage for a build work when the builder needs to be paid in stages? Borrower: Household financing a staged home build [Study](https://nzbrands.ai/research/banking/home-lending/) · Collected 11 October 2026 ## chatgpt Answer ID: c5ac59a6-14e8-482e-ba58-a356616e5fa1 In New Zealand, because you already own the land and have chosen a builder, you would typically look at a construction loan (also called a build mortgage). The key difference from buying an existing house is that the bank releases the money in stages as your home is built, rather than lending the full amount at settlement. The good news is that you generally don't need to pay the builder out of your own pocket and then wait to be reimbursed. Your bank can pay the builder directly from your approved construction loan, subject to its lending conditions and the required paperwork. ## 1. How a build mortgage works Step 1 — Get your construction loan approved The bank assesses your income, expenses, existing land ownership, deposit or equity, building contract, plans and total project cost. It approves a maximum amount for the build. Step 2 — The builder starts work Your building contract sets out payment milestones, such as foundations, framing, roofing and interior work. The bank checks that the payment arrangements fit its lending approval. Step 3 — The bank releases funds in stages When a milestone is reached, the builder issues a progress payment claim. You submit it to the bank with any required invoices, inspection reports or other evidence. The bank releases the approved amount, often directly to the builder or their nominated account. Step 4 — The build is completed The final payment is made once the contract's completion requirements and the bank's conditions are satisfied. Your lending then continues as a normal home loan, although the bank may already have converted it to its standard repayment arrangements. The exact process varies by lender and building contract. In particular, some banks require a valuation or inspection before releasing certain payments. ## 2. A worked example: how the money flows Imagine your land is already paid off and your build contract is $600,000. Your bank approves a $500,000 construction loan, and you fund the remaining $100,000 from your own savings or equity, subject to the bank's requirements. Here's an illustrative payment schedule: | Build stage | Builder's payment | Cumulative loan drawn\* | | --- | --- | --- | | Deposit / initial payment | $30,000 | $30,000 | | Foundations complete | $70,000 | $100,000 | | Framing and roof | $120,000 | $220,000 | | Exterior enclosed | $120,000 | $340,000 | | Interior fit-out | $160,000 | $500,000 | | Completion and final payment | $100,000 | $600,000 total build cost | \*Illustration only. This assumes the first $500,000 of payments are funded by the loan and the final $100,000 by you. Actual drawdowns depend on the contract, your contribution and your bank's rules. Because you own the land, its value may count as equity towards the project. That can reduce how much additional cash you need to contribute, although the bank will assess the land value, any existing mortgage and the overall project costs. ## 3. What happens to your mortgage repayments during the build? This is one of the most useful features of a construction loan. Many New Zealand banks allow you to draw the loan progressively and pay interest only on the amount you've actually borrowed. Principal repayments generally begin once the build is complete, depending on your loan terms. BNZ describes this approach in its [guide to building a house](https://www.bnz.co.nz/personal-banking/home-loans/building-house). [Construction loans - Buying land and building a house](https://www.bnz.co.nz/personal-banking/home-loans/building-house)[How to borrow to build a brand-new home](https://www.bnz.co.nz/personal-banking/life-moments/borrowing-to-build) For example, if your approved loan is $500,000 but you've only drawn $100,000 so far, interest is generally charged on that $100,000, not the full $500,000. Here's how the interest might grow as the build progresses, using an illustrative interest rate of 6% per year: Amount drawn down ## $100,000 $0 $250k $500k $0 $250k $500k $0 $250k $500k Illustrative annual interest rate ### 6.0% 4% 6% 9% 4% 6% 9% 4% 6% 9% Estimated interest per month # $500 Estimated interest per year # $6,000 Approximate interest only, assuming the balance and rate remain unchanged. Excludes fees and other costs. One important consideration: if you're also renting while the house is being built, you may have to pay rent and construction-loan interest at the same time. It's worth budgeting for that overlap. ## 4. What you need to organise before the build starts In New Zealand, I would focus on these five things before signing off on the financing. - Get the construction loan approved before committing to payment dates. Give the bank your building contract, plans, specifications, consent information and cost breakdown. Ask whether approval covers the entire project, including site works and contingencies. - Check the payment schedule against the bank's drawdown process. If the builder requires a deposit or an early payment, confirm that the bank will release funds at that point. Some banks have restrictions on deposits or advance payments. - Allow for cost overruns. A fixed-price contract can still have exclusions, provisional sums and variations. Keep a contingency fund for unexpected costs, upgrades and work not covered by the contract. [How to borrow to build a brand-new home](https://www.bnz.co.nz/personal-banking/life-moments/borrowing-to-build)[Applying for a loan to build](https://www.bnz.co.nz/personal-banking/life-moments/applying-for-a-build-loan) - Arrange the required insurance. Ask the bank and builder who is responsible for contract works insurance and when cover must begin. - Have your lawyer review the contract and loan documents. Your building contract should clearly set out progress payments, deadlines, variations and what happens if there are delays. For residential building work of $30,000 or more including GST, a written contract and prescribed consumer information requirements apply. [Contracts for your building project](https://www.building.govt.nz/projects-and-consents/why-contracts-are-valuable/contracts-for-your-building-project)[Implied contract terms](https://www.building.govt.nz/projects-and-consents/why-contracts-are-valuable/implied-contract-terms) You can read the official [Building Performance guide to building contracts](https://www.building.govt.nz/projects-and-consents/why-contracts-are-valuable/contracts-for-your-building-project) for more detail. ## 5. The key question: how much equity do you have in your land? Since you already own the section, this is likely to be a major part of how your bank structures the loan. For example, if your land is worth $400,000 and your proposed build costs $600,000, the total project value and total project cost will be assessed together. The bank will consider your existing land equity, your income, the expected completed property value and any debt secured against the land. The land's value is not automatically equivalent to cash available to pay the builder. One detail would help me explain how this would work for your circumstances: have you paid off the land completely, or is there already a mortgage on it? That makes a significant difference to how the bank might structure your construction loan and how much additional borrowing you may need. --- ## gemini Answer ID: 784d8885-7822-4018-bff4-a3a7505bd62f Because you already own the land and have contracted a builder directly, your financing will use a **progress payment construction loan** (sometimes called a construction facility) rather than a standard home loan. Because banks in New Zealand do not hand over the entire mortgage as a lump sum upfront for a custom build, funds are released incrementally as your builder reaches specific milestones. --- ### 1. The Setup & Pre-Approval Requirements Before your bank approves the loan facility and allows the first payment, they will require a strict package of documents: * **The Land:** Since you already own the land, the bank will take security (a mortgage) over it. If you have a separate land loan, it will usually be integrated or managed alongside the construction facility. * **Fixed-Price Building Contract:** Banks strongly prefer fixed-price contracts outlining a clear **progress payment schedule** (tied to specific stages like foundations, framing, roof, cladding/GIB, and final completion). * **Council-Approved Plans & Specifications:** The bank needs to see that consent is sorted or ready. * **"As If Complete" Valuation:** A registered valuer will assess your plans, specifications, and build contract to appraise what the property will be worth once finished. The bank lends against this future value. --- ### 2. How the Progress Payments Work As construction moves forward, the process for paying your builder follows a strict sequence: 1. **Milestone Reached:** Your builder completes a designated phase of construction (e.g., the foundations are poured or the roof goes on). 2. **Invoice & Verification:** The builder issues an invoice for that stage. The bank will typically require a progress valuation or inspection (carried out by their own assessor) to verify that the work has actually been completed before releasing money. 3. **Drawdown:** The bank releases the approved funds directly to your builder. --- ### 3. How Interest and Repayments Work During the Build Managing your cash flow during a progressive build differs significantly from a standard mortgage: * **Interest-Only on Drawn Funds:** While the house is being built, most banks set the construction loan portion to a **floating interest-only rate**. Crucially, you only pay interest on the *exact amount of money that has been drawn down so far*, not the total loan limit. * **Increasing Repayments:** As each stage is completed and more money is paid to the builder, your drawn loan balance increases—meaning your monthly interest payment will step up gradually as the build progresses. * **Double-Coping (Rent + Interest):** If you are renting or paying off a separate land loan while building, you will need to budget for these holding costs alongside your growing monthly interest payments until the Code Compliance Certificate (CCC) is issued. --- ### 4. Converting to a Standard Mortgage Once the builder finishes the final stage, a final inspection and a final valuation are completed to secure your Code Compliance Certificate (CCC). At that point: * The construction loan officially stops drawing down. * The facility converts into a **standard home loan**. * You can break up your total debt into fixed-rate tranches and standard **principal-and-interest** repayments begin. --- ### 💡 Key Watch-Outs for New Zealand Builders * **Provisional Cost (PC) and Prime Cost Sums:** Ensure you understand what is fixed and what is estimated. If a contract uses PC sums for items like earthworks or kitchens and actual costs exceed estimates, **banks will not automatically increase your loan**; you must cover the shortfall out of pocket. Keeping a cash contingency buffer (typically 5% to 10% of the build cost) is essential. * **KiwiSaver / First Home Grants:** If you plan to use KiwiSaver withdrawals for the build, coordinate the timing tightly with your solicitor and lender, as rules dictate *when* those funds can be accessed during a progressive build schedule. Are you working with a mortgage broker yet to lock in your lender's specific construction policy, or are you still putting the final build contract together? --- ## ai-mode Answer ID: 30ca67bc-9a91-4ec7-8c09-d38cebb480cc When you already own the land and are building with a fixed-price or standard master-builder contract, New Zealand banks handle financing through a **construction loan** with **progressive drawdowns** (progress payments). Because you own the land outright (or have significant equity in it), the land can often act as part of your equity/security for the build. * * * How Progress Payments Work with Your Mortgage * * **Approved Facility vs. Drawn Balance:** The bank approves a total loan facility for the entire cost of the build contract, but they don't hand you the cash upfront. Instead, the money is released in stages as the construction milestones are met. * **Typical Build Stages:** Payments usually align with major milestones outlined in your build contract: * Deposit (e.g., 5% to 10%) * Base / Foundation (slab poured or piles down) * Framing / Plate high * Lock-up / Roof on (windows and external doors in, weather-tight) * Fixing / Interior linings (gib, trim) * Practical Completion / Final handover Understanding Progress Payments During ConstructionBuilding Your Dream Home: Construction Loans & Progress * **The Drawdown Process:** When a milestone is reached, the builder issues an invoice. You (or your mortgage broker/solicitor) submit this invoice to your bank. The bank will often arrange a valuer or an independent inspector to briefly verify that the stage is actually complete, and then the bank pays the funds **directly to the builder**. * * * * How Interest and Repayments Work During the Build * * **Interest-Only on Drawn Funds:** While construction is underway, you generally only pay **interest-only**. Crucially, you only pay interest on the money that has actually been _drawn down_ so far, not the full loan amount. * **The "Snowballing" Repayment:** As each stage is completed and more money is paid to the builder, your drawn balance increases—meaning your monthly interest payment goes up a bit with every new stage. [Home Loan Factory] * **Floating vs. Fixed Rates:** Most New Zealand banks require the construction loan to sit on a **floating (variable) interest rate** while the build is happening because you are drawing down funds incrementally. Some banks allow you to fix portions of it at specific milestones, or you can convert the whole loan to a standard table/fixed mortgage once the final [code compliance certificate](https://buildingguide.co.nz/blog/code-compliance-certificate-nz) (CCC) is issued and the build is complete. * **Principal Repayments:** You typically do not start paying off the principal (the actual debt reduction) until the build is finished and the final loan drawdown occurs. [Westpac] * * * * Key Requirements Banks Will Ask For * * **Contract Works Insurance (Builder’s Risk):** Before the bank releases the very first dollar for construction, they will legally require proof that you have a current [Contract Works Insurance](https://www.vero.co.nz/policies/business/property-and-assets/contract-works-insurance.html) policy protecting the build site against damage, theft, or weather events. * **The Build Contract & Consents:** The bank’s lending team or valuer will closely review your fixed-price contract and building consent to ensure the valuation of the finished home stacks up against what it costs to build. * **A Buffer for Variations:** Banks rarely fund cost overruns or spontaneous "variations" mid-build automatically. It is vital to have a financial buffer or savings set aside for any changes you make during construction. * * * * If you'd like, let me know: * Are you planning to use **cash/savings** for any of the early stages or a deposit? * **Which bank** or lender are you currently talking to? I can share more details on what specific documentation they will need next.