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Replacement Cost Calculator

Enter area, cost per square foot and a quality multiplier to estimate replacement cost.

How it is calculated

The tool applies base cost = area × cost per sq ft and replacement cost = base cost × multiplier, and also shows the adjusted rate cost per sq ft × multiplier. Area is in square feet (not square metres), cost per square foot is a currency amount and the multiplier is a plain factor: 1.0 leaves the base unchanged, 1.2 adds 20% for a higher finish level or a costlier region, and a value below 1 lowers the cost. If you leave the multiplier empty, 1 is used. Area, cost per square foot and multiplier must all be above zero, otherwise there is no result. The tool does not add land, demolition, permits or fees, and it does not subtract depreciation.

Worked example

A house has 2,000 sq ft of floor area, local rebuilding costs are 150 per sq ft and the finishes justify a multiplier of 1.2. Step 1: base cost = 2,000 × 150 = $300,000.00. Step 2: replacement cost = 300,000 × 1.2 = $360,000.00. Step 3: the adjusted rate is 150 × 1.2 = $180.00 per sq ft. If you leave the multiplier empty, the total falls back to the base cost of $300,000.00.

Try this example →

Common mistakes

  • Entering square metres in the area field. The tool expects square feet, and 1 square metre is about 10.76 sq ft, so 185 m² is roughly 2,000 sq ft.
  • Using the market price per square foot instead of the construction cost. Market prices include the land and the location, which replacement cost does not.
  • Entering a multiplier as a percentage, such as 120 for +20%. The factor should be 1.2, and 120 would multiply the cost by 120.
  • Counting only the living area. Garages, basements and porches often have a different cost per square foot, so calculate them separately and add the totals.
  • Expecting the result to be a policy limit. The tool gives a rebuild estimate only, with no demolition, permits or code-upgrade costs added.

Sources

About this calculator

Replacement cost is what it would cost to rebuild a structure from scratch at today's construction prices — distinct from market value, which also reflects land price and depreciation. This calculator estimates it by multiplying a building's floor area in square feet by a base construction cost per square foot, then applying a quality or regional multiplier to account for finish level, local labor rates and material costs that vary significantly by location.

This figure is the backbone of homeowners and commercial property insurance: insurers use replacement cost, not market value, to set dwelling coverage limits, since a policy needs to cover the cost of rebuilding after a total loss regardless of what the land or the pre-loss home would have sold for. Real estate appraisers, insurance adjusters and property owners reviewing their coverage all use replacement-cost estimates like this one to check whether their current policy limit would actually be enough to rebuild.

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Comments (1)

  • Editorial team

    The tool works in square feet. If your builder's quote is per square metre, divide it by 10.764 to get a per-square-foot rate: 1,600 per m² is about 148.6 per sq ft. That figure should come from recent rebuilding quotes for similar construction, not from what homes sell for per area. Then compare the total with the dwelling limit on your current policy. Where did you get your cost-per-area figure from, and was it a quote or an estimate?

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