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Replacement Cost Calculator

Estimate what it would cost to rebuild a property, which is the figure a dwelling limit should be set against - not the market value.

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Free · No sign-up · Runs in your browser

The most consequential number on a homeowner policy is the dwelling limit, and the most common mistake is setting it against what the property would sell for. Market value includes land and location; rebuild cost includes neither. In an expensive area the sale price can be double the rebuild cost, and in a cheap one it can be well below it.

This calculator estimates rebuild cost from living area and local construction cost, adds demolition and debris removal, and applies an allowance for construction cost inflation between now and a claim.

Your numbers

Results update as you type. Nothing is sent anywhere.

1.0 is standard construction; raise it for custom finishes.

Result

Estimated rebuild cost

$474,650

Structure cost
$388,500
Extras
$25,000
Demolition and debris
$18,000
Inflation allowance
$43,150
Effective cost per square foot
$226.02
Suggested contents limit (50%)
$237,325
Suggested loss of use (20%)
$94,930

This is an estimate based on the values you entered. Actual premiums, coverage, eligibility and pricing vary by provider and by individual circumstances.

Replacement cost is what it would take to rebuild, which is unrelated to the market value or the purchase price of the property.

The suggested personal property and loss-of-use figures use the 50% and 20% proportions that many homeowner policies apply by default. Check your own declarations page for the percentages your policy uses.

Get a local contractor estimate or a carrier replacement-cost estimator before relying on this number for a coverage decision.

How to use the replacement cost calculator

  1. Enter the living area in square feet - the heated, finished space, excluding land.
  2. Enter the local rebuild cost per square foot. A local builder or your carrier can give a current figure.
  3. Set a quality factor above 1 for custom finishes, bespoke joinery or non-standard construction.
  4. Add extras, demolition cost and an inflation allowance, then compare the result against your dwelling limit.

What people use this for

  • Checking whether an existing dwelling limit is anywhere near current rebuild cost.
  • Setting the limit on a new policy before the first renewal.
  • Understanding why a limit rose at renewal without any change to the property.
  • Estimating the effect of a renovation on the coverage needed.

Worked examples

Every figure below is produced by running this calculator against the example inputs, so the numbers always match the tool.

A standard suburban home

2,100 square feet at $185 per square foot, standard finishes, $25,000 of extras, $18,000 demolition and a 10% inflation allowance.

Estimated rebuild cost
$474,650
Structure cost
$388,500
Suggested contents limit (50%)
$237,325

A custom-built home

The same size at $185 per square foot but with a 1.4 quality factor for custom construction.

Estimated rebuild cost
$684,090
Effective cost per square foot
$325.76

Why rebuild cost keeps rising

Construction costs move with materials, labour availability and local demand, and after a widespread event - a hurricane, a wildfire - they spike in exactly the area where everyone is claiming at once. That is called demand surge, and it is the reason a limit set three years ago is frequently short today.

It is also why carriers apply an inflation guard endorsement that raises the limit automatically each year. That endorsement is usually the explanation when a premium rises with no other change.

What a rebuild actually includes

Not just the structure. Demolition and debris removal come first, and on a total loss they are a significant cost. Current building codes then apply to the rebuild even if the original construction predated them, which can add substantially - some policies include an ordinance-or-law endorsement for exactly this, and many do not.

Landscaping, driveways, retaining walls and detached structures usually fall under other coverages rather than the dwelling limit. Check which is which on your own policy before assuming the dwelling limit covers them.

Methodology and assumptions

What this calculator does, and what it deliberately does not do.

  • Structure cost is living area multiplied by cost per square foot and by the quality factor. Extras and demolition are added, then the inflation allowance is applied to the total.
  • The suggested contents and loss-of-use figures use the 50% and 20% proportions most homeowner forms apply by default.
  • This is an estimate. A carrier replacement-cost estimator or a local contractor quote should be used before setting a limit.
  • All figures are estimates produced from the values you enter. This site has no rate feed and no carrier data, so it cannot quote or price a policy.
  • Nothing you type is transmitted or stored - the calculation runs entirely inside your browser.

This calculator provides an estimate based on the information you enter. Actual insurance premiums, coverage, eligibility and pricing vary by provider and individual circumstances.

This website is not an insurance company, an insurance agency or a licensed broker. It does not sell insurance, does not provide insurance quotes, and is not authorised to give advice about which policy you should buy.

No result produced here is an offer of insurance or a guarantee of coverage. Only a licensed insurer or agent, working from your verified details, can quote or bind a policy.

Frequently asked questions

Why is rebuild cost different from what I paid?

The purchase price includes the land and the location premium. Insurance covers the structure only, so the two figures are unrelated.

Where do I find the cost per square foot for my area?

A local builder will give you a current figure, and most carriers use a replacement-cost estimator that will produce one for your property. Regional construction cost indices also publish them.

What is extended replacement cost?

An endorsement that pays a stated percentage above the dwelling limit - often 25% or 50% - if rebuild costs exceed it. It is the practical protection against demand surge.

Should I insure for market value?

No. Insuring above rebuild cost pays for coverage the policy will never use, and insuring at market value in a low-cost area can leave you badly short.

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