FreeByte

Rebuild cost calculator

Insure the building, not the price.

Built and reviewed by Dovanic, Founder and editor, FreeByteLast reviewed: 2026-08-18
$
12%

Rebuild sum insured

$332,640

Base rebuild

$297,000

With these inputs, rebuild sum insured comes to $332,640. Base rebuild works out to $297,000.

What moves the number · Rebuild sum insured

Input−10%Now+10%
Floor area (sq ft)$299,376$332,640$365,904
Rebuild cost per sq ft$299,376$332,640$365,904
Contingency$329,076$332,640$336,204

Solve for an input

Whatmakesequal

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Save this set of inputs, change something, then save again to compare the outcomes side by side.

Insure the building, not the price.

A worked example

Starting figures

Floor area (sq ft)
1,800
Rebuild cost per sq ft
$165
Contingency
12%

What it returns

Rebuild sum insured
$332,640
Base rebuild
$297,000

How to read the results

With the defaults above, rebuild sum insured works out at $332,640.

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