# 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, USGS groundwater maps, EPA radon zones, EIA electricity rates, and IRS Section 25C tax credits).

## Primary Calculators & Tools (All 10 Live)
- [All 2026 Home System Calculators Hub](https://uscostindex.com/calculators): Complete directory of 10 interactive cost estimators and 50-state multi-trade labor rates.
- [HVAC Replacement Cost Calculator](https://uscostindex.com/hvac-replacement-cost-calculator): Interactive Manual J BTU/tonnage tool for central air conditioner, heat pump, and furnace installation costs.
- [Heat Pump & Mini-Split Cost Calculator](https://uscostindex.com/heat-pump-cost-calculator): Cold-climate Hyper-Heat vs standard inverter heat pumps, multi-zone mini-splits, and $2,000 IRA Section 25C tax credit.
- [Water Heater Replacement Cost Calculator](https://uscostindex.com/water-heater-replacement-cost-calculator): Tankless GPM & USGS groundwater ΔT sizing, 50-gallon tanks, and hybrid heat pump water heaters.
- [Roof Replacement Cost Calculator](https://uscostindex.com/roof-replacement-cost-calculator): Trigonometric roof pitch multipliers, hip/valley waste factors, Architectural Shingles, and 24-Gauge Standing Seam Metal.
- [Window Replacement Cost Calculator](https://uscostindex.com/window-replacement-cost-calculator): 1 to 30 windows with volume discounts, Vinyl vs Fiberglass vs Wood-Clad frames, Low-E Argon, and Pocket vs Full-Frame.
- [Radon Mitigation System Cost Calculator](https://uscostindex.com/radon-mitigation-cost-calculator): State EPA Radon Zone pCi/L data, Active Sub-Slab Depressurization (ASD), crawlspace 12-mil vapor barriers, and 24/7 fan power cost.
- [Septic Tank & Leach Field Cost Calculator](https://uscostindex.com/septic-tank-cost-calculator): 150 GPD/bedroom code sizing (1,000–2,000 gal), Conventional Gravity, Chamber, Aerobic ATU, and Engineered Sand Mound systems.
- [Siding Replacement Cost Calculator](https://uscostindex.com/siding-replacement-cost-calculator): Exterior wall square footage, .046" Vinyl, Insulated Vinyl, James Hardie ColorPlus Fiber Cement, and LP SmartSide.
- [Seamless Gutter & Leaf Guard Cost Calculator](https://uscostindex.com/gutter-replacement-cost-calculator): 5-inch and 6-inch .032" K-style seamless aluminum, Galvalume steel, copper, and 316 stainless steel micro-mesh leaf guards.
- [Foundation Crack & Piering Repair Cost Calculator](https://uscostindex.com/foundation-repair-cost-calculator): Hydraulic steel push piers, torque-driven helical piles, carbon fiber bowed-wall straps, and PE engineer reports.

## 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, SOC 47-2031 Carpenters/Glaziers).
- U.S. Energy Information Administration (EIA): Electric Power Monthly state-by-state residential retail electricity rates.
- U.S. Geological Survey (USGS) & Environmental Protection Agency (EPA): Shallow groundwater temperature maps and State Radon Zone screening databases.
- U.S. Department of Energy (DOE) & IRS: Building America climate zones 1–7, 2026 A2L Refrigerant Mandate, and Section 25C Energy Efficient Home Improvement Credit guidelines (Form 5695).