Since a home will probably be the biggest asset we own, we’ll need to protect it in case something unexpected happens. With most house insurance, it’s up to us to set our ‘sum insured’ – the capped amount the insurer would pay if our home were destroyed.
Instead of insurance that would fully replace our home no matter what the cost (which some insurers still offer), these days most insurers require that we set our own level of insurance at a capped amount. Our ‘sum insured’ is the highest amount that our insurer will pay if our house is damaged beyond repair.
We need to set that sum ourselves, by figuring out how much would be needed to replace our home.
If we set our sum insured too low, we could end up not receiving enough to rebuild our home after a disaster and having to pay the difference. If we set our sum insured too high, we may be paying for insurance we don’t need.
The sum insured should be set at the amount it would take to completely rebuild your home – including the costs of demolishing and removing what’s left of your old house, if necessary.
So you cannot base our estimate on:
Remember that the sum insured is the cost to rebuild, and it will change each year due to inflation and availability of materials and labour. And if you renovate, you’ll need to adjust the estimate once again.
You also need to consider other features on the property, such as the driveway, retaining walls or pools, as these are covered by your house insurance policy too.
Your sum insured has to be accurate and kept accurate, and it’s up to you to make sure it is.
To help, some insurers have come up with free online calculators such as the one at need2know.org.nz from IAG. These have been adapted for New Zealand conditions and can give an estimate of what the cost to rebuild might be.
It makes sense to review these costs annually and adjust your sum insured if necessary.
Online home insurance calculators can estimate your sum insured each year and when you make changes to your home. However, they generally won’t be able to take into account:
Calculators do not allow for things that may go along with rebuilding, such as removal costs or building consents you may have during the rebuild.
If your home is unique in its design, construction or location, the extra cost it would take to rebuild may not come up in the calculator. If your sum insured does not cover all your potential costs, you could end up paying for them yourself.
Finally, a home insurance calculator can suggest a higher amount each year for your sum insured, but it will be up to you to increase the figure each year with your insurer.
Getting professional help to provide an estimate of what it could cost to rebuild our home, for example from a quantity surveyor, can give us an accurate figure for our sum insured. They will charge a fee for this service, so discuss this with them in advance.
The New Zealand Institute of Quantity Surveyors has listings of firms around the country that can help.
The Insurance Council of New Zealand has more information as well.
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