Building a New Home in NZ — Finance Options Explained

Building your own home is an exciting milestone. But before you break ground, you need to understand how to finance the project. Unlike buying an existing house, new-build finance works differently — and getting it right can save you thousands.

This guide walks you through the key finance options for building a new home in New Zealand. We'll explain how each works, what to watch for, and how to choose the right approach for your situation.

This is general information only and does not constitute financial advice. Always do your own research before making financial decisions.

How building finance differs from a standard home loan

When you buy an existing home, you get the full loan amount upfront. With a build, you draw down funds in stages as construction progresses. This is called a construction loan or progress payment loan.

Key differences include:

  • You pay interest only on the amount drawn down so far — not the full loan amount.
  • Funds are released in stages (called "progress payments") after inspections confirm work is complete.
  • Lenders typically require a higher deposit (often 20% or more).
  • You'll need a fixed-price building contract and council-approved plans before approval.

Step 1: Understand the build stages and progress payments

Most lenders release funds in these standard stages:

Stage Typical % of total cost What's covered
Land purchase 25–35% Buying the section (if not already owned)
Foundation/slab 10–15% Earthworks, concrete slab or piles
Framing 15–20% Timber or steel framing, roof trusses
Lock-up stage 15–20% Roof, windows, doors, cladding
Fitting out 10–15% Plumbing, electrical, insulation, plasterboard
Completion 10–15% Final finishes, landscaping, Code Compliance Certificate

Your lender will send a valuer or quantity surveyor to inspect each stage before releasing the next payment. This protects both you and the bank.

Step 2: Choose your finance option

Option 1: Standard construction loan (progress payment loan)

This is the most common option. The lender approves a total loan amount, then releases funds in stages as described above. You only pay interest on the amount drawn down.

Pros:

  • Lower interest payments during construction
  • Built-in checks at each stage
  • Works with most major banks (ANZ, ASB, BNZ, Westpac, Kiwibank)

Cons:

  • Requires a detailed building contract and plans upfront
  • Can be slower if inspections are delayed
  • Some lenders charge a construction loan fee (typically $200–$500)

Option 2: Turnkey finance

A turnkey build means you buy a completed home from a developer or builder. You sign a single contract for the finished house, and the builder arranges all construction financing. You only need a standard home loan at settlement.

Pros:

  • Simpler — no progress payments to manage
  • You know the final price upfront
  • Often easier to qualify for a standard mortgage

Cons:

  • Usually more expensive (builder includes their financing costs)
  • Less control over design and materials
  • You may need to pay a deposit before construction starts

Option 3: Owner-builder finance

If you plan to manage the build yourself (without a main contractor), you'll need an owner-builder loan. This is harder to get because lenders see it as higher risk.

Pros:

  • Potential cost savings if you have trade skills
  • Full control over every decision

Cons:

  • Requires a larger deposit (often 30–40%)
  • Stricter lending criteria — fewer banks offer it
  • You need a detailed project plan and budget
  • Higher interest rates may apply

Option 4: HomeStart grant and KiwiSaver withdrawal

If you're a first-home buyer, you may be able to use your KiwiSaver savings and the Government's First Home Grant (formerly HomeStart) to help with your deposit.

Key points:

  • You can withdraw most of your KiwiSaver balance (except $1,000) for your deposit.
  • The First Home Grant can give you up to $10,000 per person (or $20,000 for a couple) for a new build.
  • You must meet income and house price caps — check with Kāinga Ora.
  • These funds are typically used for the land purchase or initial deposit.

Step 3: Check your eligibility and deposit requirements

Most lenders require a deposit of at least 20% of the total project cost (land + build). Some may accept 15% if you have strong income or a low loan-to-value ratio (LVR).

LVR rules from the Reserve Bank mean banks can only lend a limited amount above 80% LVR. For new builds, the rules are more relaxed — you may be able to borrow up to 95% in some cases.

To qualify, you'll typically need:

  • A fixed-price building contract from a licensed builder
  • Council-approved plans and specifications
  • A signed quote from a quantity surveyor (for cost verification)
  • Proof of your deposit funds (e.g., KiwiSaver statements, savings accounts)
  • A pre-approval letter from your lender

Step 4: Compare lenders and fees

Not all banks offer the same construction loan features. Here's what to compare:

Feature What to look for
Interest rate type Floating during construction, then fixed after completion
Construction loan fee Usually $200–$500, but some lenders waive it
Progress payment frequency Most do 5–6 stages; some allow more flexibility
Valuation fees May be charged per stage (around $200–$400 each)
Early repayment penalties Check if you can pay off extra without fees
Redraw facility Useful if you overpay during construction

Major banks like ANZ, ASB, BNZ, Westpac, and Kiwibank all offer construction loans. Non-bank lenders (like Resimac or Squirrel) may have more flexible criteria but higher rates.

Step 5: Get pre-approval and start the build

Once you've chosen a lender, apply for pre-approval. This gives you a conditional commitment based on your income, deposit, and the building contract.

After pre-approval:

  1. Finalise your building contract and council consents.
  2. Provide all documents to your lender for full approval.
  3. Arrange a solicitor to review the contract and loan documents.
  4. Sign the loan agreement and start construction.

During the build, stay in close contact with your builder and lender. Any delays or cost overruns can affect your finance — so have a contingency fund (typically 10–15% of the build cost) set aside.

Tips for a smooth build finance process

  • Get a quantity surveyor's report — This helps the lender verify costs and speeds up approvals.
  • Keep your credit file clean — Avoid new credit applications during the build process.
  • Use a fixed-price contract — This reduces the risk of cost blowouts.
  • Plan for interest-only payments — During construction, you'll pay interest on drawn funds, not the full loan.
  • Consider a mortgage broker — They can compare multiple lenders and help with the paperwork.

Final verdict: Which option is right for you?

For most people building a new home, a standard construction loan from a major bank is the best option. It's straightforward, widely available, and gives you control over payments.

If you want simplicity and don't mind paying a premium, turnkey finance is a good alternative — especially if you're a first-home buyer.

Owner-builder finance is best left to experienced DIY builders with strong financial reserves. And always check if you're eligible for the First Home Grant — it can make a big difference to your deposit.

Compare at least three lenders before committing. Use a mortgage broker if you're unsure where to start.