# US Cost Index - Independent US Building & Repair Cost Indices

> Accurate, engineering-grade residential replacement and installation cost calculators across all 50 US States, calibrated against official US government datasets (BLS labor rates, DOE climate zones, EIA electricity rates, and IRS Section 25C tax credits).

## Primary Calculators & Tools
- [HVAC Replacement Cost Calculator](https://uscostindex.com/hvac-replacement-cost-calculator): Interactive tool for calculating central air conditioner, heat pump, and furnace installation costs by square footage and climate zone.
- [Heat Pump Cost & Tax Credit Estimator](https://uscostindex.com/heat-pump-cost-calculator): Sizing and IRA Section 25C federal rebate calculator ($2,000 maximum credit).
- [Water Heater Replacement Cost Calculator](https://uscostindex.com/water-heater-replacement-cost-calculator): Tank vs tankless gas and hybrid heat pump water heater installation costs.
- [Roof Replacement Cost Calculator](https://uscostindex.com/roof-replacement-cost-calculator): Architectural shingle, metal, and tile roofing costs per square foot and roofing square.

## Data Methodology & Public Standards
- Bureau of Labor Statistics (BLS): Occupational Employment and Wage Statistics (SOC 49-9021 HVAC, SOC 47-2152 Plumbers, SOC 47-2181 Roofers).
- U.S. Energy Information Administration (EIA): Electric Power Monthly state-by-state commercial and residential retail electricity rates.
- U.S. Department of Energy (DOE): Building America climate zones 1 through 7 and SEER2/HSPF2 regional efficiency standards.
- Internal Revenue Service (IRS): Section 25C Energy Efficient Home Improvement Credit guidelines (Form 5695).