Ultimate NZ Guide to House Insurance (2025): Compare & Find the Best and Cheapest Cover

Based on the latest Q2 2025 data from Quashed.co.nz, the average cost of NZ house insurance in 2025 is $3,055 a year or $255 a month. This has increased almost 50% since 2022. 

Depending on where in the country you live, the average price of house insurance can be very different. 

Wellington is the most expensive region in New Zealand for house insurance at an average cost of double that of Auckland. Overall, house insurance premiums continue to soar. 

View the average quote for your house insurance with Market Scan for FREE.

To get the best deal, you first need to know what you're buying. Let's cut through the jargon.

What Does a Standard House Policy Actually Cover?

Your house insurance policy is typically split into three main parts:

The Dwelling: This is the main event. It covers the physical structure of your home, including the foundations, roof, walls, and fixtures like the kitchen and bathroom. It also usually covers outbuildings like garages, sheds, and fences, plus fixed carpets and driveways.

Contents Insurance (Optional but Recommended): This is a separate policy that covers your belongings—everything from your couch and TV to your clothes and cutlery. You can almost always get a discount by bundling this with your house insurance.

Liability Protection: This is a crucial but often overlooked benefit. It covers you if you are held legally liable for accidentally damaging someone else's property or injuring someone. For example, if a fire at your house spreads to your neighbour's property. Cover is typically for $1 million or more.

Sum Insured cover

How it works: You and your insurer agree on a maximum dollar amount they will pay out if your house is destroyed. This is your ‘Sum Insured’. This figure must be enough to cover everything from demolition and council fees to the final coat of paint on a complete rebuild. Any costs outside of this will be out of your pocket. 

Your responsibility: The responsibility for calculating an accurate rebuild cost falls entirely on you. If you set your sum insured at $800,000, but a post-disaster surge in building costs means the actual rebuild is $1,000,000, you are personally responsible for the $200,000 shortfall.

How to calculate your Sum Insured: 

1. Use an online calculator (most common): Most insurers provide a version of the Cordell Sum Sure Calculator. This is a great starting point. It uses data about your home's size, age, and construction materials to estimate a rebuild cost. We recommend adding a 10-15% buffer to the calculator’s estimate. 

2. Get a professional valuation (most accurate): You can hire a quantity surveyor or registered valuer to prepare a detailed replacement cost estimate. This might cost a few hundred dollars but provides ultimate peace of mind, especially for architecturally designed or non-standard homes.

Under-insuring by even 20% could leave you $100,000+ out of pocket in a worst-case scenario.

Area Replacement cover

Area replacement cover was common before the Christchurch earthquakes. It promised to rebuild your home to a similar size and standard, regardless of the cost. These policies are rare now due to the financial risk for insurers. But some insurers still do offer this type of cover or a variation of this. 

How it works: Instead of specifying a dollar amount, your policy insures your home based on its size (in square metres). If your 200m² home is destroyed, the insurer agrees to pay the actual, reasonable cost to rebuild it to the same size and standard, whatever that cost may be at the time.

The insurer’s responsibility: With this cover, the insurer—not you—carries the risk of inflation and post-disaster price spikes. If building costs jump 30% after a major flood, your cover automatically accounts for this. You are not capped by a fixed dollar amount.

Here’s a comparison table of the popular insurers in NZ and the type of cover they offer 

Our Recommendation:

For the ultimate peace of mind, Area Replacement cover is the superior product, as it removes the dangerous guesswork of predicting future building costs.

However, Sum Insured cover is a perfectly adequate and more affordable option for the majority of Kiwis, provided you do your homework. If you choose Sum Insured, you should:

• Use an online calculator like the Cordell Sum Sure Calculator.

• Add a significant buffer (we recommend at least 15-20%) to protect against inflation.

• Review the figure regularly, once a year is ideal. 

The cheapest policy can become the most expensive mistake if it leaves you hundreds of thousands of dollars short when you need it most. Understand which type of cover you have, and if it's Sum Insured, make sure that number is sufficient.

These two levers that have the biggest impact on your premium:

1. Sum Insured 

2. Excess 

Here’s an example using a property on Auckland’s North Shore: 

A higher excess will lower your premium:

Increasing excess from $500 to $2,500 = save 19%

Savings = $590 a year

A lower sum insured will lower your premium:

Lowering the sum insured from $1,250,000 to $1,000,000 = save you 14%

Savings = $325 a year

Find your house insurance savings with Quashed’s Market Scan for FREE.

What is Natural Hazards Cover (NHCover)?

Natural Hazards Cover, or NHCover, is New Zealand’s government-backed insurance scheme for natural disasters. Think of it as a nationwide safety net that provides a base layer of protection for every homeowner with a standard insurance policy. 🏡

It provides cover for your house and land against damage from specific events like earthquakes, tsunamis, landslides, and volcanic eruptions. It is split into two parts:

For your House 🏠: It provides up to $300,000 (+GST) of cover for damage from an earthquake, landslide, tsunami, or volcanic eruption. Your private insurer then covers any repair costs above this amount, up to your total policy limit.

For your Land 🌳: It provides cover for your residential land against the same events, plus storm and flood damage. This is a key benefit, as private insurers don't typically cover your land.

The best part is, you don’t need to do anything to sign up. NHCover is an automatic and built-in part of your house insurance. Your insurer calculates the required government levy, includes it in your premium, and handles everything on your behalf.

Simply, if you have house insurance, you have NHCover.

Comparing the market can save you over $1,000. In 2025, the average saving found on Quashed.co.nz is $579.

Example 1: Auckland, 3 Bedroom & 2 Bathroom, $1M sum insured, $1,000 excess

Cheapest Quote (AMP Insurance): $2,285

Highest Quote (Tower): $2,970 

Price Difference Gap/Savings: $685

Example 2: Blenheim, 4 Bedrooms & 2 Bathroom, $800,000 sum insured, $1,000 excess

Cheapest Quote (State): $2,395

Highest Quote (Tower): $3,770 

Price Difference Gap/Savings: $1,375

To shop and compare your quotes, use Quashed’s Market Scan for FREE.

1. Now for the good part. Here are strategies to cut the cost without reducing cover.

   1. Increase Your Excess: The 'excess' is the amount you pay towards a claim before the insurer pays the rest. Most policies default to around $400-$500. By increasing this to $1,000 or even $2,000 (if you can comfortably afford it), they'll reward you with a significantly lower premium typically between 5-15%. 

   2. Pay Annually: If you can, pay your premium in one go for the year. Monthly payment plans often come with fees that add up.

   3. Strengthen Your Home: Inform your insurer if you have security measures like monitored alarms or fire sprinklers. For older homes, letting them know you've updated the wiring or plumbing can sometimes result in a lower premium as it reduces risk.

   4. Review Optional Benefits: Some premium policies include add-ons you may not need, like extensive cover for retaining walls or glass art. Read your policy document and see if a more standard (and cheaper) policy still meets your needs.

   5. Maintain a Good Claims History: A no-claims bonus isn't just for car insurance. While less common, some insurers reward customers who haven't made a claim in several years. Think twice before claiming for minor damage.

   6. Shop Around (The Golden Rule): The price for identical cover on your home can vary by over $1,000 between insurers. Never accept your renewal offer without comparing it. Use a tool like Market Scan to see what you could be saving right now.

Switching your home insurance is much easier than you think. You can switch at any time. 

1. Compare the market with a tool like Market Scan to find a cheaper, better policy. 

2. Purchase your new policy online. It usually takes about five minutes.

3. Cancel your old policy. Simply call or email your old insurer to cancel. They will refund you for any unused portion of the premium you had already paid.

1. Select The Right Cover: Understand the difference between a Sum Insured or Area Replacement cover and choose one that best suits your needs. 

2. Nail Your Sum Insured: This is the single most important figure. Under-insure and you risk financial disaster. We recommend using an online calculator at the minimum. Consider adding 10-15% to allow for inflation if your policy doesn’t. 

3. Raise Your Excess: Increasing your excess from $1,000 to $2,500 can slash your annual premium by hundreds of dollars. It's the fastest way to save.

4. Pay Annually: Most insurers charge extra fees for paying monthly. Paying in one lump sum can save you 10% or more.

5. Never Auto-Renew Without Shopping Around: Your renewal price is almost never the best price. Use our Market Scan Tool below to compare your renewal offer against the other options in the market in under 3 minutes.

Your Next Step: Take Control of Your House Insurance

House insurance can feel like a complex and expensive purchase, but you now understand the difference between cover types, you know how to set your Sum Insured, and you have a clear checklist for cutting costs while keeping cover.

The single biggest mistake a homeowner can make is to just rollover and accept their renewal offer. The power is in your hands, but only if you take a few minutes to compare your options.

Don't wait. Use our free, smart Market Scan Tool right now to see how your current policy stacks up against the market. Get the right cover at the best price and enjoy the peace of mind that comes with knowing your biggest asset is properly protected.

Frequently Asked Questions (FAQ)

1. Why is my house policy so much higher than last year, even with no claims?

   • Increasing cost of repairs, increasing use of technology, spikes in theft & risk and more climate events related claims has increased the cost for insurers which they then pass on in price hikes. Profit margins also factor into the price of premiums. 

2. Is the cheapest house insurance policy always the worst?

   • Not at all. "Cheapest" doesn't mean "worst," just as "most expensive" doesn't always mean "best." The price difference often comes down to an insurer's business model, their current appetite for risk in your specific area, and their operational efficiency. The key is to compare the policy wording on key benefits—like temporary accommodation limits or cover for retaining walls—alongside the price to ensure the cheapest option still meets your needs.

3. How can I compare policies fairly if the fine print is so different?

   • This is the hardest part of comparing manually. To compare "apples with apples," you need to look beyond the headline price and Sum Insured. Our Market Scan tool is designed to simplify this, laying out these key policy benefits side-by-side with the price.

4. Are there any hidden fees or penalties for switching my insurer mid-year?

   • No, there are no penalties. You are free to switch your insurance provider at any point during your policy term. When you cancel your old policy, your previous insurer will refund you for the unused portion of your premium (pro-rata). The process is designed to be simple and fee-free to encourage competition in the market.

5. What is the key difference between Sum Insured and Area Replacement cover? 

   • With Sum Insured cover, you are insured up to a fixed dollar limit that you select. This is the maximum amount your insurer will pay out if your house is totally destroyed. With Area Replacement, you're covered for the actual cost to rebuild your home to its original size, whatever that price may be.