Know Your Property Value Instantly
Thinking about refinancing your home loan? Before comparing interest rates or talking to a new lender, there’s one number worth understanding: your home’s current market value.
Your property value can help you work out how much equity you have and your approximate loan-to-value ratio (LVR). It can also be relevant when a lender assesses your home as security for a mortgage.
But there’s an important distinction between an online property estimate, a council rating valuation, a real estate appraisal and a registered valuation.
So, if you’re asking “How much is my home worth for refinancing?”, here’s what you need to know as a New Zealand homeowner.
Your home’s market value is one part of your overall mortgage position.
The simplest way to calculate home equity is:
Home equity = current market value of your property − amount owing on your home loan
For example, if your home is worth $800,000 and you owe $500,000 on your mortgage:
$800,000 − $500,000 = $300,000 equity
As you repay your mortgage, the amount you owe generally reduces. If the market value of your property also changes, your equity position can change as well.
ASB describes home equity as the difference between the market value of a property and the amount still owing against it. It also notes that an estimated property value may be useful as an initial guide, but may not be suitable for lending purposes. ASB’s guide to home equity explains the calculation in more detail.
LVR, or loan-to-value ratio, compares the amount you owe with the value of the property securing the loan.
The calculation is:
LVR = loan amount ÷ property value × 100
For example:
So, in this example, the mortgage represents 62.5% of the property’s estimated value.
BNZ similarly defines LVR as the amount of a loan compared with the value of the property.
Your LVR isn’t the only factor a lender considers. Your income, expenses, existing debts, repayment ability and the lender’s own criteria can also affect a lending decision.
The Reserve Bank of New Zealand uses LVR restrictions as one of its macroprudential tools.
As of the Reserve Bank’s August 2026 review, the current settings allow banks to have:
These are limits on the banks’ new lending rather than a rule saying every borrower must have exactly a particular deposit or equity level. Individual banks still apply their own lending criteria.
The Reserve Bank also states that loans refinanced from another lender are exempt from its LVR restrictions, although the bank providing the new loan still assesses the application under its own lending policies.
This distinction is important: Reserve Bank LVR restrictions and a lender’s own lending requirements are not the same thing.
Yes.
Imagine you originally bought your home for $700,000 and your mortgage was $560,000.
If your current mortgage balance has fallen to $500,000, your equity depends on what the property is worth now.
If its current market value is estimated at $800,000:
$800,000 − $500,000 = $300,000 equity
If the property’s current market value is instead $750,000:
$750,000 − $500,000 = $250,000 equity
This is why an up-to-date indication of your property value can be useful when reviewing your mortgage position.
For another explanation of property value and valuation in NZ, see My House Worth’s guide to what’s my property value in New Zealand.
No — they shouldn’t automatically be treated as the same thing.
New Zealand councils use rating valuations to help determine property rates. LINZ explains that local councils undertake rating valuations, often using contracted valuation service providers, while full property valuations are carried out by registered valuers.
Rating valuations are also carried out at particular valuation dates. LINZ states that local authorities carry out property valuations for rating purposes at least every three years, although the timing varies between councils.
This means your property’s current market value can be different from the rating valuation shown in council records.
For example, your home may have:
So, if you’re refinancing, don’t assume your council’s Capital Value is automatically the figure your lender will use.
This is one of the most important things to understand.
An online estimate can give you a quick indication of what your property may be worth.
These tools commonly use available property information, previous transactions, comparable sales and other data.
They can be useful for getting a starting point.
However, Consumer NZ’s March 2026 investigation found that online property estimates can differ substantially from eventual sale prices and may not account for property-specific factors such as renovations, views, pools or other improvements.
That doesn’t mean online estimates have no value. It means they should be treated as an indication rather than a guaranteed sale price or formal valuation.
A real estate agent can provide an appraisal based on local market knowledge and comparable properties.
An appraisal can be useful if you’re considering selling and want an indication of a likely selling range.
A registered valuer provides a formal valuation.
LINZ states that registered valuers must be certified by the Valuers Registration Board and hold an annual practising certificate if they are actively valuing for the public.
If your lender specifically requires a registered valuation, an online estimate or agent appraisal may not be an acceptable substitute.
It can be a useful first step.
Suppose your mortgage balance is $450,000 and you’re unsure whether your home is worth $650,000, $700,000 or $750,000.
Getting an initial indication of your property’s current value can help you understand the approximate range your equity may fall within.
For example:
| Estimated property value | Mortgage balance | Approx. equity | Approx. LVR |
| $650,000 | $450,000 | $200,000 | 69.2% |
| $700,000 | $450,000 | $250,000 | 64.3% |
| $750,000 | $450,000 | $300,000 | 60.0% |
These figures are examples only. An estimate is not a guarantee of market value, and a lender may use a different valuation when assessing your application.
Your home’s value isn’t determined by its number of bedrooms alone.
Several factors can influence what buyers may be prepared to pay.
The suburb, street and surrounding area can influence demand.
Access to transport, shops, schools, employment areas, recreation and other amenities can also affect buyer interest.
Recent sales of similar homes can provide useful evidence of market activity.
The most useful comparisons are usually properties with similar characteristics, location, land size, floor area and condition.
The size of the section and the size and layout of the home can affect its appeal and value.
Maintenance, presentation and the overall condition of the property can influence what buyers may be prepared to pay.
A renovated kitchen, additional bathroom, improved outdoor area or other upgrades may affect the property’s appeal.
However, the amount spent on a renovation does not automatically translate into the same increase in market value.
Supply, buyer demand, interest rates and broader economic conditions can influence property prices.
This is why a property estimate from several years ago shouldn’t automatically be treated as an indication of today’s value.
If refinancing is on your radar, it helps to have a few basic figures ready.
Check your latest home loan statement so you know approximately how much you still owe.
Use recent comparable sales and a reputable property estimate as a starting point.
You can also request a free house appraisal from My House Worth to get an initial indication of your property’s value.
Subtract your mortgage balance from the estimated property value.
Divide your mortgage balance by your estimated property value and multiply by 100.
Ask the lender whether it will accept an existing valuation, automated valuation or appraisal, or whether a registered valuation is required.
This last point is particularly important.
For example, BNZ says a new house valuation may be required as part of refinancing and notes that valuation costs can form part of the refinancing process.
Potentially, but having equity doesn’t automatically mean you’ll be able to borrow a particular amount.
Banks consider both the security provided by your property and your ability to service additional borrowing.
BNZ says the amount available for a home-loan top-up can depend on factors including how much has already been repaid, the home’s value, the LVR and whether the borrower can afford the additional repayments.
ASB similarly notes that having equity doesn’t remove other lending requirements, including the ability to service the lending.
So, if your home has increased in value, that’s useful information — but it isn’t by itself an approval for additional borrowing.
You don’t have to wait until you’re ready to sell.
Homeowners may want to check their property’s estimated value when:
If you’re specifically researching valuation costs and the valuation process, you can also read My House Worth’s NZ house valuation guide.
Let’s put everything together.
Suppose:
Estimated home value: $900,000
Mortgage balance: $540,000
Your approximate equity would be:
$900,000 − $540,000 = $360,000
Your approximate LVR would be:
$540,000 ÷ $900,000 × 100 = 60%
That gives you a useful starting picture of your mortgage position.
But remember: the $900,000 figure is an estimate in this example. A lender may require a different form of valuation before making a lending decision.
Before approaching a lender, consider these five steps:
1. Check your current mortgage balance.
Know exactly how much you owe.
2. Get an indication of your current property value.
Look at recent comparable sales and use an online estimate or appraisal as a starting point.
3. Calculate your approximate equity and LVR.
This gives you a clearer picture of your current position.
4. Check the potential costs of switching.
Refinancing can involve costs such as legal fees, early repayment charges, cash-reward clawbacks or valuation fees, depending on your circumstances. BNZ specifically highlights these potential costs when considering a refinance.
5. Ask the new lender what valuation it requires.
Don’t pay for a formal valuation without first checking whether the lender actually requires one and what type it will accept.
If you’re considering refinancing, selling or simply want to understand your property’s current market position, an up-to-date property estimate can be a useful starting point.
My House Worth provides a free house appraisal in New Zealand to help homeowners get an indication of their property’s value.
It isn’t a replacement for a registered valuation where one is required, but it can give you a starting point for understanding your home’s potential market value.
Want to know what your home could be worth? Get your free property appraisal with My House Worth.
Your home’s current value can help you understand your equity and approximate LVR when you’re reviewing your mortgage or considering refinancing.
But it’s important to use the right type of valuation for the decision you’re making.
An online estimate can be a useful starting point. A real estate appraisal can provide another perspective on market value. A registered valuation may be required when a lender needs a formal valuation.
The key is to understand the difference between them and check with your lender before relying on a particular figure.
If you’re considering refinancing, start with three numbers:
your mortgage balance, your estimated current home value and your approximate equity.
From there, you can have a much more informed conversation with your lender about your options.