Home Sum Insured

Getting to know your total sum insured

This information is a guide only and is not intended to replace your policy documents.

When you have replacement home insurance, such as an Echelon or Essence policy, choosing the right total sum insured is really important; but it can be tricky to get it right. We’re here to help you understand how to calculate your total sum insured and reduce the risk of you being underinsured.

Keeping it up to date

It is your responsibility to set the total sum insured (including the components that make up the total sum insured) when you apply for insurance and whenever you renew your policy. It’s important you review your sums insured and keep them up to date throughout the policy period and when you renew. You can review and update your sums insured at any time by contacting us.

Estimate it with Cordell Sum Sure

You need to ensure your total sum insured is up-to-date and reflects the increasing costs of rebuilding, repairing, or replacing your home. The Cordell Sum Sure calculator is a good place to start. It’ll provide you with an estimated cost to rebuild your home inclusive of allowances for professional fees, demolition and removal of debris. You should also add an allowance for future inflation to cover any increased building and repair costs over the course of your insurance and the rebuild period.

Your use of the calculator is subject to terms and conditions, which you can find when you open the calculator. The estimated rebuild cost is a guide only and is not intended to replace a professional valuation or quantity surveyor estimate. Not all prepopulated information provided by the calculator will necessarily be accurate for your home and it is your responsibility to correct any inaccurate information. You must decide whether the estimate is appropriate or if you should amend it based on your knowledge of your home and property.

What is a total sum insured exactly?

When you take out your replacement home insurance policy, such as an Echelon or Essence policy, we’ll ask you for the total sum insured, which is made up of the home sum insured and any sums insured for special features. It is the maximum amount (with any applicable excesses deducted) that is payable for the rebuild of your home in the event of a total loss – for example, if your house burnt down, was destroyed in an earthquake or suffered significant damage from flooding.

The Echelon policy includes specified sub-limits for retaining walls and recreational features within the home sum insured. You will need to arrange additional cover if the specified sub-limits are not enough to replace those features. If you have an Essence policy, there is no cover for retaining walls and recreational features unless we’ve agreed to cover them – please contact us if you need cover for these.

It’s important to check your sums insured each year. They need to take into account rising building costs, inflation and any changes you’ve made to your home.

What total sum insured is:

  • the estimated total amount it would cost to rebuild your home on its current site, including any recreational features such as swimming pools and tennis courts, retaining walls and special features, such as jetties.
  • an amount you need to choose and keep up-to-date. You can use the Cordell Sum Sure calculator to help estimate your sum insured or you can arrange for an insurance valuation.

What total sum insured isn't:

  • the rateable value set by the council
  • the purchase price
  • the market value
  • the land value
  • automatically inclusive of special features (like jetties and cable cars) and, depending on your policy wording, may not automatically include retaining walls or recreational features unless you add extra cover to your policy.

Why is it important to get it right?

Your total sum insured should cover the full cost of rebuilding your home to its equivalent size and quality, including the cost of demolition, consents and other fees. These costs can change over time, so it’s important you regularly review and keep your total sum insured up-to-date. If you set it too low and you need to repair or rebuild your home, you may:

  • have to rebuild to a smaller size or lower quality; or
  • have to pay for some of the repairs or rebuilding yourself.

Working out your sum insured

When working out your replacement value sum insured, you’ll need to consider a range of things about your current home and the cost to rebuild it. These include:

  • demolition costs
  • council fees and consents
  • professional fees
  • labour costs
  • floor area of your home
  • land slope
  • construction materials
  • quality of the materials and finish
  • fixtures and fittings (e.g. oven, heat pump, toilets and baths)
  • fixed floor coverings (e.g. carpet)
  • number of levels in the home
  • design – (e.g. villa, bungalow, contemporary, one-off architectural)
  • outbuildings such as granny flats, detached garages or carports,
  • driveways, decks, paths and fences
  • utilities or services to your house (e.g. power and telephone lines, data cables, waste water pipes)
  • rising building costs (i.e. inflation).

Remember to include any recreational features (such as swimming pools and tennis courts), retaining walls or special features (such as a bridge or cable car) that would increase the cost to rebuild your home. You will need to add extra cover for recreational features or retaining walls if the cost to rebuild them is more than the policy limit or your policy does not automatically cover these items. If you have special features, remember to tell us what they are and what they would cost to rebuild as they are not automatically covered. Make sure you check your Policy Wording for everything you need to include in your sum insured.

What do I need to do?

Are you new to Lantern? Been with us for couple of years? Built or bought a new house? Don’t know where to begin? Take a look below to see where you fit in.

New to Lantern

Thanks for choosing us. To get a quote you’ll need to calculate your Sum Insured.

You can use the Cordell Sum Sure calculator or contact an expert.

You will need to:

  1. Work out your Sum Insured
  2. Call us to get a quote on 0800 800 800

Already with Lantern

We appreciate the trust you put in us to insure some of your most treasured possessions.

It’s a good idea to review your Sum Insured at least every year due to the changing cost of construction, or if you’ve made any changes or additions to your property since you last reviewed your Sum Insured .

You will need to:

  1. Work out your Sum Insured
  2. Let us know the new Sum Insured. You can do this at any time, but especially at renewal or when you make changes to your home.

I’ve just bought or built a house.

Congratulations. It’s no easy feat building or buying a house.

It’s important not to rely on the market value or purchase price to work out your Sum Insured as the cost to rebuild can often be very different than the cost to purchase a home.  If you have recently built a house, you could use the build cost, but remember to add the cost of demolition, consider all parts of your home that are covered by the policy and inflation that may have occurred since that build price was agreed.

You will need to:

  1. Work out your Sum Insured
  2. Let us know the Sum Insured so we can add it to your policy.

Calculating your Sum Insured

Use the Cordell Sum Sure calculator

The Cordell Sum Sure calculator helps you to estimate your Sum Insured. It saves you a lot of leg work by pre-populating your property information, which you can then check and update to provide a more accurate estimate. The calculator draws on publicly available data from around New Zealand about many aspects of home construction and reconstruction and is updated regularly.

The calculator includes professional fees, demolition and removal of debris and will account for price difference in some of these services throughout New Zealand. While every care is taken to provide a reliable result, the estimated rebuilding cost produced by the calculator is intended as a guide only. It also doesn’t take into consideration rising building costs over the period of your insurance policy. If you want to include an allowance for this in your Sum Insured, you’ll need to add it to the estimate produced by the calculator.

The calculator also doesn’t include GST in its estimate because your Lantern policy doesn’t require GST in the Sum Insured. GST is payable in addition to the total sum insured for Lantern home policies.

If you have any Special Features (such as a bridge, cable car or jetty) you will need to add this on top of the estimate the calculator produces as well.

Call a professional

If you want more peace of mind that your Sum Insured is accurate, it might be useful to get a professional to assess your property. If you live in a home greater than 500sqm, or higher value than $2 million, or an architecturally designed home, this is strongly recommended.

Construction Cost Consultants are registered professionals who can provide residential valuations at a competitive price for Lantern customers. Contact them below:

Alternatively try other registered professionals, such as:

More information on using the calculator

  • If your address can’t be found and it includes a unit number (e.g. 23a) try different variations (e.g. 1/23, 23/1). If your address still can’t be found, Cordell Sum Sure calculator may not have details of the property, it may be a new subdivision or the calculator is not suitable for the property at that address.
  • Don’t worry if the photograph doesn’t match your house. The photograph might be different (e.g. your house is brand new, or there is an old photo, a boundary photo or street front photo) but the property details are based on the address not the photo.
  • The calculator assumes an average floor area for any garages, sheds or pool houses, so if you have a particularly large detached building you might want to select a Sum Insured higher than the estimate the calculator provides.
  • If you’re in the Canterbury area and your property has been identified as having a CERA technical category rating (foundation requirements), then an allowance will have been made for this. This is indicative only and you should seek specific engineering advice for a reliable estimate of any costs.
  • The calculator uses typical building costs for standard finishes to provide an estimate.  If your home has significant special features and fittings,  was built to a superior standard, is very large or has a high value, consider using other options to establish a better estimate of the rebuilding cost, such as a registered property valuer or quantity surveyor, or select a Sum Insured higher than the estimate the calculator provides.
  • Factors such as the slope (steepness) of your land, the style and quality of construction are important to get right when using the calculator.  Seek advice if you are unsure what to enter in the calculator
  • This calculator has been customised for Lantern so it is important that you use the calculator provided by your insurer.

More about shared ownership

  • Owners of cross-leased properties need to consider how to cover shared assets such as driveways, fences and retaining walls . Check your property's Title documents for reference to a 'plan of flats' (or similar) that sets out the various areas the cross lease applies to, and if you're still unsure, talk to your legal advisor.
  • Body corporates should consider all the units in their multi-dwelling property as well as any common property.

Please remember

This calculator provides an estimate Sum Insured for your home but the final decision is yours, so if you think your amount is not correct you can change it. This is general information and is not a recommendation, opinion or guidance.  If you would like a recommendation please contact a registered valuer or quantity surveyor.  This calculator information does not provide any advice or opinion on the extent or adequacy of the cover provided by Sum Insured insurance. This information is not personalised financial advice and does not take into account your particular situation. You must make your own decision on the Sum Insured that is appropriate for your circumstances.

The Cordell Sum Sure calculator is an independent tool. Lantern doesn’t have access to the information you enter, or access to the estimate that it produces, so if you’d like to adjust your home’s Sum Insured, or add additional cover for retaining walls, Recreational Features like swimming pools and tennis courts or Special Features like bridges, you’ll need to contact us. It’s your responsibility to ensure that your Sum Insured is adequate.