How does house insurance work in New Zealand?
General information, not advice on your situation. Buying through Tower's online quote is direct, without advice. QuoteHub is a Tower partner and Smiths Insurance & KiwiSaver may receive a commission from Tower.
House insurance, also called home insurance, pays to repair or rebuild a house you own after an insured event such as fire, a burst pipe or a storm, up to the sum insured you choose. No law requires it in New Zealand (Tower), but banks require customers with a mortgage to keep adequate cover (ICNZ). A policy that includes fire cover also brings in natural hazards cover from the Natural Hazards Commission (NHC, formerly EQC), the first layer of cover if a natural disaster damages your home (NHC).
The short version: set the sum insured to what a rebuild would cost, understand that NHC and your insurer share a natural disaster claim, and know that gradual damage such as a slow leak is usually excluded. The rest of this page covers each in turn, with the checks to run before you accept a quote.
What house insurance covers and what it leaves out
A house policy covers the building and what is permanently attached to it. ICNZ says a house can be insured against sudden, unforeseen and accidental damage from all perils, or only against defined perils such as fire, theft, flood, storm or earthquake (ICNZ). Tower's House Standard wording, for example, names fixtures that are plumbed or wired in, fitted carpets, decks, garages, carports and sheds. It pays for sudden and accidental loss or damage, and it covers your liability if an accident at the house damages someone else's property (Tower wording). Other insurers' wordings differ.
The word "sudden" catches people out. ICNZ says the courts read it as abrupt or instantaneous, meaning minutes or hours rather than days or weeks. Gradual damage, such as rusting roofing iron, rotten weatherboards or a leaking shower, is excluded (ICNZ). Most owner-occupier policies add a small hidden-damage benefit, and ICNZ gives $2,000 to $10,000 as an example range (ICNZ). Tower's Standard, Plus and Premium levels give $1,000, $2,000 and $3,000 for hidden gradual water damage (Tower).
The table shows how a house policy normally responds to common events, so you can see where the gaps are before you need to claim.
| What happens | Does a house policy normally respond? |
|---|---|
| A tree falls on the roof | Yes, because the damage is sudden (ICNZ) |
| A pipe inside a wall leaks for weeks | Usually not, apart from a small hidden-damage benefit (ICNZ) |
| An earthquake or landslide damages the house | Yes, with NHC cover first and your insurer above its cap (NHC) |
| Furniture, clothes and electronics are lost | No, these need contents insurance (Tower) |
| The house is rented out to tenants | Not under an owner-occupier policy, so a rental needs landlord insurance (Tower) |
Limits depend on the policy and the level you choose. Tower's Standard, Plus and Premium levels pay up to $15,000, $25,000 and $30,000 for temporary accommodation after an insured event (Tower). Its wording also limits cover once a house has been unoccupied for more than 90 consecutive days, and its minor-alteration benefit excludes renovation work that needs a building consent (Tower wording). Tower sells separate contract works cover for that work (Tower).
Sum insured: the number that sets your cover
Your sum insured is the most your insurer will pay if the house is severely damaged or destroyed, and you choose it. It should cover demolition, consents and a rebuild, so it is not the market value, purchase price or rateable value (ICNZ).
Set it too low and ICNZ says you may have to rebuild to a lesser size or quality, or pay part of the cost yourself. Set it too high and you pay for cover that goes unused, because insurers do not pay more than the actual cost of rebuilding (ICNZ). ICNZ says about half of New Zealanders do not realise the figure should be a rebuild cost (ICNZ). It lists four ways to estimate the figure: a quantity surveyor, a registered valuer's insurance valuation, a licensed builder's estimate or your insurer's online calculator. It recommends using more than one and reviewing the figure each year (ICNZ). Our guide to working out your house sum insured sets out the steps.
The inputs matter more than most people expect. Tower says a rebuild figure depends on floor area, land slope and access, construction materials, the quality of the finish, fixtures and fittings, and the number of levels. So a sloping section with a long driveway and a high-spec kitchen costs more to rebuild than a flat one with a basic finish, even at the same floor area. Tower also says it adjusts the sum insured before each renewal, using either the Cordell Sum Sure calculator or the building components of the consumer price index, and that you still need to review the figure yourself every year (Tower). Check the renewal letter rather than assuming the number kept up. This is a rebuild figure, not the land: Tower says sum insured includes demolition, debris removal, professional fees and council fees, and excludes the market value of the property, what you paid and what the land is worth (Tower).
The basis of settlement matters too. ICNZ describes three kinds of cover: a fixed sum insured, which is the most common; total replacement, which rebuilds up to the floor area you insured; and indemnity, which pays what the house was worth just before the loss. Some older homes that have not been modernised may qualify only for indemnity cover (ICNZ).
How Natural Hazards Commission cover fits in
Natural hazards cover comes automatically with a home policy that includes fire cover. NHC pays for earthquake, landslide, volcanic, hydrothermal and tsunami damage and fire caused by them, and for storm and flood damage to land only, so storm and flood damage to the house itself depends on your own policy. You claim through your insurer, which manages the NHC part and pays anything above NHC's cap (NHC). In Tower's wording, the most it pays is the difference between your NHC cover and your sum insured, less any excess, the part of a claim you pay yourself (Tower wording).
The table shows NHC's main figures.
| NHC cover | Figure or rule |
|---|---|
| Building cap, for each natural hazard event | Generally $300,000 plus GST (NHC) |
| Levy, maximum for a year | $480 plus GST, included in your premium (NHC) |
| Excess on a building claim | $500 per insured home, for damage first occurring from 1 July 2024 (NHC) |
| Land | Limited cover for some land under and around the home, which you cannot top up through your insurer (NHC) |
| Not covered | Temporary accommodation, driveway surfacing, paving, trees, gardens, fences and swimming pools (NHC) |
| Contents | Not covered since 1 July 2019 (ICNZ) |
The next table shows who pays first in the most common natural hazard events.
| Event | NHC | Your insurer |
|---|---|---|
| Earthquake, landslide, volcanic or hydrothermal activity, tsunami | Pays first for the house, up to its cap (NHC) | Manages the claim and pays above the cap, up to your sum insured (NHC) |
| Fire caused by one of those events | Covered as part of NHC cover (NHC) | Pays above the cap, up to your sum insured (NHC) |
| Storm or flood | Land only, not the house (NHC) | The house is covered only if your policy includes storm and flood (NHC) |
Two things catch people out. ICNZ says insurers charge a separate natural disaster excess for items NHC does not cover, such as driveways and pools (ICNZ), and Tower's wording adds $5,000 for damage to a driveway, path, fence or pool (Tower wording). A section 72 notice on a property's title, which records consented building work on land prone to hazards such as flooding or slips, can lead NHC to decline a claim, and your insurer may then decline it too (ICNZ). Natural hazards and flood cover on a NZ home goes through the layers.
What shapes a house insurance quote, and how to compare them
A quote starts with what you tell the insurer. ICNZ lists what insurers ask for (ICNZ):
- the address and when the house was built
- what it is built of, its floor area and your rebuild estimate
- special features such as a pool, and any heritage listing
- whether it is attached to another house or part of a multi-unit complex
- any existing damage, who lives there and what it is used for
- whether it will ever be unoccupied for 60 days or more in a row
A typical premium has three parts, according to ICNZ: the company premium for expected claims and running costs, a natural disaster premium for reinsurance, and government levies and GST (ICNZ). Tower itemises a risk-based premium within a house premium (Tower), based on its assessment of earthquake, flood, landslide and sea surge risk at the address (Tower). Premiums depend on the address, so this guide quotes none, and how much house insurance costs in NZ explains each driver.
A higher voluntary excess can lower the premium but raises what you pay at claim time (ICNZ). How to pay less for house insurance covers the other levers and what you cannot change. ICNZ also says not to buy on price alone and to compare policies with the same sort of cover (ICNZ). Quotes that look similar can differ a lot underneath. Line them up on:
- the sum insured and the basis of settlement
- the excess, including extra excesses for driveways, fences and pools
- sub-limits, and what must be listed to be covered, which in Tower's wording includes pools, solar power systems and garden retaining walls above its included amount (Tower wording)
- stand-down periods on a new policy, which in Tower's wording are 72 hours for events such as storm, flood and landslide, plus conditions on rental use and unoccupied periods (Tower wording)
Other insurers sell house cover too, and the same checks work on their wordings.
House insurance guides and related cover
- Getting the numbers right: how to work out your house sum insured and how much house insurance costs in NZ.
- Lowering the premium: how to pay less for house insurance in NZ sets out which changes cut the price and which cut your cover.
- Natural disasters and leaks: natural hazards and flood cover shows how NHC and your insurer share earthquake and landslide claims and where storm and flood fit, and roof leaks and gradual damage explains why a slow leak is treated differently from a storm.
- One policy or two: home and contents insurance, one policy or two, the contents insurance guide and renters insurance in NZ.
- Renting a house out: landlord insurance and landlord versus house insurance for a rental.
- Tower: Tower house insurance, Standard, Plus and Premium, how to get a Tower quote online and how to make a Tower claim.
- Buying and building: first home buyer insurance, insurance on settlement day and insurance when building or renovating.
- The loan: house insurance protects the building, not the repayments if you die or cannot work, which is what mortgage protection is for.
Getting a quote from Tower online
Have the details above to hand: the address, the year the house was built, what it is built of, its floor area and your sum insured figure. QuoteHub's link opens Tower's online quote, where you can quote house cover alone or with contents and other Tower policies. Tower sets the price and issues the policy.
Questions people ask
How much does house insurance cost in NZ?
It depends on the address, the sum insured, the level of cover and the excess, so no single figure applies. ICNZ says factors that make a claim more likely tend to raise the premium (ICNZ). How much house insurance costs in NZ sets out each driver, including the levies.
Is house insurance compulsory in NZ?
No law requires it, but a mortgage lender usually does. Tower says home insurance is not a legal requirement (Tower), while ICNZ says banks require mortgage customers to keep adequate cover and advises confirming a house is insurable before you make an offer, or making the sale subject to insurance (ICNZ). Insurance on settlement day covers the timing.
How much house insurance do I need?
Enough to rebuild the house, not its market value. ICNZ says the sum insured should cover demolition, consents and the rebuild (ICNZ), and the house sum insured guide shows how to work it out.
Does house insurance cover the things inside my house?
No. Tower says house insurance covers the property itself and may cover plumbed-in fixtures such as a dishwasher, while furniture, electronics, jewellery and clothes need contents insurance (Tower). ICNZ says fitted carpets are generally in house policies but some count them as contents, so two insurers can leave a gap or double up (ICNZ). See home and contents insurance, one policy or two.
Does house insurance cover a rental property?
Not once the house becomes a dedicated rental. Tower's house wording excludes a dedicated tenanted property that you do not use personally, and says to tell it if the house becomes tenanted (Tower wording). Landlord insurance is the separate product (Tower), and landlord versus house insurance for a rental explains the gap.
Does house insurance cover roof leaks and other gradual damage?
Usually not. Roof leaks and gradual damage covers the detail. ICNZ says gradual damage is excluded, and a leak that has run for days or weeks counts as gradual even if you only just found it (ICNZ). If you disagree with a decision, complain to your insurer first, then to its free dispute resolution service if it is not resolved within two months (ICNZ).
Adviser's view
QuoteHub's read: your sum insured is usually the most a policy pays if the house is destroyed, and it is a rebuild cost rather than a market value, so getting it right matters more than any single benefit.
Get a Tower quote online
Tower’s own quote opens in a new tab. House, contents, landlord, car and boat cover can be quoted together in one go.
Tower Easy Save: save $400*
- $200 off house or landlord
- $100 off comprehensive car
- $100 off contents
*$400 is made up of individual policy discounts, each available separately. New, eligible policies only with promo code EASYSAVE. Excl. contract works. Ends 30 Jan 2027. Ts&Cs apply. Tower’s Easy Save terms, checked 6 October 2026.
QuoteHub is a Tower partner. If you buy through this link, Smiths Insurance & KiwiSaver may receive a commission from Tower. Buying online is not financial advice.
Cite this page QuoteHub NZ (2026). House Insurance NZ: How Cover and Quotes Work. www.quotehub.co.nz/house-insurance. Updated 2026-10-07.
References
- ICNZ: House and contents insurance
- ICNZ: Insurance health check
- ICNZ consumer guide: Buying a house
- ICNZ consumer guide: Sum insured
- ICNZ consumer guide: Gradual damage
- ICNZ consumer guide: Excesses
- ICNZ consumer guide: Insurance pricing
- ICNZ consumer guide: Natural disaster insurance
- ICNZ consumer guide: Disputes
- NHC Toka Tū Ake: About natural hazards cover
- Tower: House insurance
- Tower: House and contents bundle
- Tower: Understanding your house or landlord's premium
- Tower: Risk-based pricing
- Tower: Calculating your sum insured
- Tower: House Standard wording 09-24
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