About Home Replacement Cost Calculator

Our mission: Give every homeowner, insurance agent, and real estate investor access to an accurate, transparent replacement cost estimate. It's built on the same industry-standard cost data that professional appraisers use, at no charge.

Why We Built This Calculator

A 2022 CoreLogic study found that 69% of American homes with homeowners insurance are underinsured, with average coverage gaps of 20% below replacement cost. After the 2021 Marshall Fire in Colorado, the average insured home had a $150,000 coverage gap. This isn't a fringe problem. It's the default outcome when homeowners don't have a reliable way to estimate their rebuild costs.

Professional replacement cost appraisals cost $300 to $600. Insurance carrier tools are opaque. They don't show their inputs or let you adjust them. Online "calculators" are often just lead generation forms for insurance agents.

We built this calculator to close that gap: a free, transparent tool that uses Marshall & Swift and RS Means construction cost data, shows its methodology, and doesn't ask for your email address.

Our Data Sources

Our replacement cost estimates are built on three authoritative construction cost databases:

• Marshall & Swift Cost Indices. The industry-standard residential construction cost database used by insurance companies and appraisers nationwide. Base costs per square foot by construction type.
• RS Means Regional Cost Data. Annual surveys of actual labor rates and material prices by market, used to calibrate our regional location factors.
• National Association of Insurance Commissioners (NAIC). Replacement cost methodology guidelines and insurance industry standards for dwelling coverage calculations.

These are the same sources used by Verisk's 360Value and CoreLogic's RCT Express, the tools that major insurance carriers use to generate dwelling limit recommendations at underwriting. We apply this data through a straightforward formula: base cost × quality multiplier × story factor × location factor × square footage, plus garage.

Our Editorial Process

Every piece of content on this site (calculator methodology, blog articles, FAQ answers) follows a consistent process:

1. Source verification: All factual claims are cross-referenced against primary sources: NAIC guidelines, Marshall & Swift data, RS Means surveys, and NAHB research.
2. Annual review: Calculator inputs (base costs, quality multipliers, location factors) are reviewed annually against current construction cost data.
3. Accuracy caveats: We state plainly where our estimates are less reliable (unusual construction, very high-end finishes, post-disaster markets) and recommend professional appraisals in those cases.
4. No incentive conflicts: We don't sell insurance. We don't receive referral fees from carriers. Our only interest is that you get an accurate number.

Limitations of This Calculator

This calculator is accurate within 10 to 15% for standard residential construction. It is designed as a starting point for insurance coverage decisions, not a replacement for a professional appraisal in complex cases.

It does not capture: site-specific conditions (steep slopes, unusual soils, flood zone requirements), historic district requirements, custom architectural features, post-disaster surge pricing in specific markets, or the cost of temporary housing during reconstruction. For homes with replacement costs over $1 million or with unusual construction, a certified residential appraisal is worth the $300 to $600 investment.