Whole-house generator installation costs range from $8,500 to $18,000 depending on your home's electrical panel configuration and natural gas line requirements, with the final price determined by site-specific factors like distance from your meter, existing gas infrastructure, and permit fees in your jurisdiction.
The primary cost drivers in generator installation break down into several distinct categories. The generator unit itself—typically a 16kW to 22kW Generac model for most residential applications—accounts for roughly 30–40% of the total project cost. The transfer switch, which automatically routes power from the generator to your home's electrical panel during an outage, adds another $1,200–$2,500 depending on amperage requirements. If your home uses natural gas for heating or appliances, gas line installation or extension can range from $1,500–$4,000, particularly if the generator sits 50+ feet from your meter or requires trenching under landscaping.
Electrical work represents a substantial portion of the budget. Licensed electricians must install a dedicated circuit from your main panel to the generator, ensure proper grounding, and verify compliance with local electrical codes. This typically runs $2,000–$3,500. Permit fees vary by municipality but generally fall between $300–$800. Some jurisdictions also require inspections at rough-in and final completion stages, which can add $200–$400 in inspection fees.
Installation labor typically accounts for 2–3 days of work. A concrete pad must be poured if your generator sits on soil, adding $400–$800. The technician must also run both electrical conduit and gas lines, connect the transfer switch to your main panel, perform load testing, and ensure the automatic transfer mechanism functions correctly during a simulated outage.
At Blackmon Plumbing, we've completed over 200 generator installations across our service area in the past 19 years. Our approach eliminates the uncertainty many homeowners face: we provide flat-rate, upfront pricing approved before work begins—no hourly surprises or hidden fees. As an authorized Generac dealer with an MPL-38162 license, our team is prepared with installation expertise including transfer switches, electrical panels, and gas fittings. This means we don't chase parts or leave jobs incomplete while waiting for materials. We bring everything needed to complete your installation in one mobilization.
The investment in a whole-house generator protects your home's value, ensures continuous operation of critical systems like heating and refrigeration during outages, and provides peace of mind. Many homeowners recoup a portion of this cost through insurance discounts—some insurers offer 5–10% reductions for homes with backup power systems.
Blackmon Plumbing offers comprehensive whole-house generator installation with transparent pricing and Generac-authorized expertise for homeowners seeking reliable backup power solutions.