Cost guide · Electrical
How much does backup generator installation cost in 2026?
Typical range
$7,500 – $15,000
whole-house standby (18-22kW)
Whole-house standby generator installation runs $7,500–$15,000 in 2026 for a typical 18-22kW residential system (Generac, Kohler, Cummins). Smaller partial-coverage systems (8-12kW) run $5,000–$8,500. Portable generator + transfer-switch setups run $1,500–$4,000.
Why the range is wide
Full whole-house generator install: generator unit ($3,500–$8,500) + transfer switch ($600–$1,500) + concrete pad ($300–$700) + propane tank or natural gas hookup ($500–$2,500) + electrical labor ($1,500–$3,500) + permit + utility/gas coordination. Total: $7,500–$15,000+.
Factors that affect price
Capacity
8-12kW (essentials): $5,000–$8,500. 18-22kW (whole house, modest): $7,500–$12,000. 24-32kW (whole house, generous): $10,500–$18,000.
Fuel type
Natural gas (utility hookup): no fuel tank needed. Propane (above-ground tank): +$1,500–$3,500. Buried propane tank: +$3,500–$7,500. Diesel: rare residential, requires above-ground tank.
Transfer switch
Manual transfer switch: $300–$700. Automatic (whole-house): $800–$2,000. Smart transfer with load shedding: $1,200–$3,500.
Distance from panel
Within 25 ft of panel: standard. 25-100 ft (typical): +$500–$1,500 for wire + conduit. 100+ ft: +$1,500–$3,500.
Concrete pad / mounting
Pre-cast composite pad (smaller units): $300–$500. Custom concrete pad: $500–$1,200. Above-grade install where ground is uneven: +$300–$800.
Permits + inspections
Electrical permit + gas permit: $300–$800 combined. Inspections required for both. Some HOAs add review fees or noise restrictions.
Regional variation
Hurricane-prone markets (Gulf Coast, Florida, North Carolina coast) have highest residential generator adoption. Power-grid-unstable markets (Texas after 2021 freeze, California with PSPS shutoffs) drive accelerating adoption. Northeast ice-storm markets are steady demand. Western mountain markets (forest fires, isolated grids) are growing.
Backup generator installation — frequently asked
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