Generator Installation Cost
What does whole-home Generac or Kohler generator installation cost in the DMV? Real prices for 14kW–24kW systems.
Whole-home standby generator installations in Maryland, DC, and Northern Virginia typically run $9,500–$16,000 turnkey for a 14kW–18kW Generac or Kohler system with automatic transfer switch and pad. Larger 22kW–24kW systems for bigger homes fall in the $12,000–$22,000 range. Pricing includes generator, ATS, pad, permits, gas hookup coordination, and commissioning.
Key details
- 14kW–18kW turnkey: $9,500–$16,000
- 22kW–24kW turnkey: $12,000–$22,000
- Larger commercial/estate units: quoted
- Includes ATS, pad, permits, commissioning
- Gas line coordination included
- Annual maintenance plans available
What sizes the generator
A load calculation weighs your HVAC compressor, well pump, kitchen loads, EV charger, and critical circuits. Most 3,000 sq ft homes are well served by 18-22kW; larger estates or homes with dual HVAC and a pool need 24kW+.
What's included in a turnkey quote
Generator unit, automatic transfer switch, concrete or composite pad, propane or natural gas coordination (line sizing, connection to existing service), permits and inspection, commissioning, and homeowner walkthrough.
Ongoing costs to plan for
Annual maintenance runs $250-450 for a check-up, oil change, and battery test. Propane fuel costs during an extended outage can add up — most homeowners run 3-8 gallons per hour depending on load and generator size.
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