Financing a Home Renovation: Your Options Explained

Home renovations are one of the most common reasons New Zealand homeowners look to access additional finance. Whether it is updating a tired bathroom, adding a bedroom, or undertaking a significant structural project, the costs can quickly exceed what most people have in savings. At Chaperone, we work with many borrowers who are navigating the renovation finance question, and this article outlines the main options available so you can approach the decision with a clear picture of what is available.

Using Your Existing Home Equity

For homeowners who have built up equity in their property, the most commonly used approach to renovation financing is a mortgage top-up. A top-up involves increasing your existing home loan to access a portion of the equity you have built up, with the new funds used for the renovation. For example, if your home is worth $900,000 and your mortgage balance is $500,000, you have $400,000 in equity. Most lenders will allow you to borrow up to 80% of the property's value, which in this case would mean access to up to $220,000 in additional funds, less any applicable low-equity margin. The advantage of a top-up is that it uses your home loan rate rather than personal loan rates, making it a cost-effective way to fund significant renovation work.

Construction Loans for Major Renovations

For large-scale renovations - particularly those involving structural changes, additions, or significant alterations that require building consent - a construction loan may be more appropriate than a standard top-up. Construction loans are structured differently from standard mortgages. Rather than releasing the full amount upfront, funds are drawn down progressively as the work reaches agreed milestones and inspections are completed. This protects both the borrower and the lender, ensuring funds are tied to actual progress. The lender will typically want to see detailed plans, a fixed-price contract with a licensed builder, and evidence of all required consents before approving a construction facility. Interest is usually charged only on the portion drawn down at any given time, which can reduce costs during the build phase.

Personal Loans for Smaller Projects

For renovations at the lower end of the cost scale - repainting, flooring, minor bathroom updates, or new appliances - a personal loan or using available credit facilities may be more practical than restructuring a mortgage. Personal loans are faster to arrange and do not require a property valuation, but they come with significantly higher interest rates than home loan rates and shorter repayment terms, which means the monthly repayments can be substantial relative to the amount borrowed. If you have a revolving credit or redraw facility attached to your mortgage, using available funds from these is generally a lower-cost alternative to a personal loan for smaller renovation budgets.

The Role of a Registered Valuation

When financing a renovation through a mortgage top-up, your lender will usually require a registered valuation of the property either before the work begins or upon completion - sometimes both. For significant renovations that are expected to add meaningful value to the property, a post-renovation valuation may support a higher borrowing level. It is worth understanding that lenders assess properties conservatively, and not every dollar spent on a renovation will translate directly to an increase in assessed value. A mortgage adviser can help you understand whether a renovation loan is feasible given your current equity position and the estimated cost of the project.

Getting Consents and Using Licensed Tradespeople

This is worth mentioning in the context of financing because lenders funding construction work will typically require evidence that the work has been properly consented and carried out by licensed building practitioners. Renovation work completed without proper consents can create problems not just at the time of borrowing, but also at the point of future sale and when obtaining property insurance. Lenders can and do decline to fund work that does not meet these standards, and unpermitted work discovered during a valuation can complicate an existing loan application.

Planning Your Renovation Budget Realistically

Renovation costs in New Zealand have risen significantly in recent years, and it is common for projects to exceed their initial estimates. Building in a contingency of 15 to 20% over your primary budget is a widely accepted practice in the industry. Understanding the full likely cost before you commit to a financing structure helps avoid the frustrating situation of running out of funds mid-project. At Chaperone, we can connect you with mortgage advisers who will help you think through the right financing structure for the scale and nature of your renovation, so you can approach the project with confidence in your funding.