Replacement Cost Calculator Formula
Understand the math behind the replacement cost calculator. Each variable explained with a worked example.
Formulas Used
Total Replacement Cost
total_replacement_cost = building_cost + site_improvementsBuilding Cost Only
building_only_cost = building_costSite Improvements Cost
site_cost = site_improvementsVariables
| Variable | Description | Default |
|---|---|---|
building_sqft | Building Square Footage(sq ft) | 2200 |
cost_per_sqft | Construction Cost Per Sq Ft(USD) | 175 |
site_improvements | Site Improvements(USD) | 25000 |
building_cost | Derived value= building_sqft * cost_per_sqft | calculated |
How It Works
Replacement Cost Estimation
Replacement cost is the expense of constructing a functionally equivalent building using current materials and methods.
Formula
Replacement Cost = (Building Sq Ft x Cost Per Sq Ft) + Site Improvements
Included Costs
Worked Example
Rebuilding a 2,200 sq ft home at $175/sq ft with $25,000 in site improvements.
- 01Building cost: 2,200 x $175 = $385,000
- 02Site improvements: $25,000
- 03Total replacement cost: $385,000 + $25,000 = $410,000
Frequently Asked Questions
What is the difference between replacement cost and reproduction cost?
Replacement cost uses modern materials and methods to build a functionally equivalent structure. Reproduction cost replicates the exact original building, which is often more expensive for historic properties.
How do I find local construction costs?
Check with local builders, the RS Means construction cost database, or your county building department. Costs vary widely by region, ranging from $100 to $400+ per square foot.
Does replacement cost include land?
No. Replacement cost covers only the structure and site improvements. Land value is added separately when using the cost approach to determine total property value.
Ready to run the numbers?
Open Replacement Cost Calculator