New Builds vs Existing Homes: Mortgage Differences

The decision between buying a new build and an existing property is often framed as a lifestyle choice, but it also has real implications for how you can borrow. New builds and existing homes are treated differently by lenders and by the Reserve Bank of New Zealand's lending rules, and those differences can affect how much deposit you need, what schemes you can access, and how the loan is drawn down. It is worth understanding both sides of the picture before you start your property search.

LVR Rules and Deposit Requirements

The RBNZ's loan-to-value ratio (LVR) restrictions set limits on how much lenders can lend at high LVRs. For existing homes, owner-occupiers typically need at least a 20 percent deposit to avoid being counted against a lender's LVR limit. However, new builds have historically been treated more favourably under LVR rules, with exemptions that allow borrowers to access lending with a smaller deposit. This exemption reflects a policy goal of encouraging new housing supply. The specific thresholds and exemptions can change as the RBNZ adjusts its settings, so it is worth confirming current rules at the time of your purchase.

First Home Schemes and New Builds

Several government-backed first home schemes in New Zealand apply more generously to new builds. The First Home Loan scheme, which allows eligible first-home buyers to borrow with as little as a 5 percent deposit under a government guarantee, has historically offered higher property price caps for new builds compared to existing homes. The First Home Grant, which provides eligible KiwiSaver members with a grant toward a first home purchase, has also typically offered a higher grant amount for new builds. These thresholds and eligibility criteria change periodically, so checking the current settings with a mortgage adviser or directly with Kainga Ora is important.

Loan Structure Differences

For existing homes, the purchase price is agreed and settled in a single transaction. Lending is straightforward: the loan is drawn down at settlement, and repayments begin immediately. New builds, particularly those under construction, operate differently. If you are buying a property that is not yet complete, the loan may be drawn down in stages as construction progresses. This is known as a progress payment structure. Alternatively, a turn-key new build involves a single settlement at completion, which is more similar to buying an existing property. The type of new build contract you enter determines which lending structure applies.

Valuation and Risk Considerations

Lenders approach valuations differently for new builds. For an off-the-plan purchase, the lender will typically obtain a valuation based on the contract price and projected completion value, which carries more uncertainty than valuing an existing, completed property. If market conditions shift during the construction period, the completed property may be valued below the contracted price, which can affect the final lending amount. Borrowers buying off the plan should be aware of this risk and build appropriate financial buffers into their planning.

Warranties and Building Standards

New builds in New Zealand must comply with the Building Code and come with a Residential Guarantee, which provides some protection against defects. This can offer lenders and buyers additional comfort. Existing homes, by contrast, vary widely in condition, and a lender may require a building inspection report before confirming lending. Any issues identified in an inspection can affect a lender's willingness to lend or the loan amount they are prepared to offer.

At Chaperone, we help borrowers understand the full lending picture before they commit to either type of property. Whether you are drawn to the certainty of an existing home or the potential advantages of a new build, a mortgage adviser can help you navigate the specific rules, schemes, and structures that apply to your situation.