The replacement cost is not the same as the property's market value. The market value reflects what a buyer would pay for the property, while the replacement cost is focused on construction costs to rebuild the property. A common method for calculating the replacement cost is the cost approach. This approach adds the estimated value of the land to the current cost of constructing a replacement for the improvements, then subtracts depreciation. Obtaining current costs often requires consulting with builders, contractors, and cost estimators who can provide up-to-date information on building codes, market conditions, and construction materials​​.

There are tools and services available that can simplify this process. You can use a simple calculator for free at BuildingJournal.com. There are also services that can do a more accurate estimate, like e2Value.

An accurate replacement cost is vital for insurance purposes, especially considering factors like inflation and construction cost increases. If a property's replacement cost is based on outdated pricing, the owner may find their insurance coverage insufficient in the event of damage or loss. Therefore, it's recommended to regularly review and update this cost to reflect current market conditions​​.