Most whole home generator installations are completed in one day — typically 6 to 8 hours for a standard installation. However, the full timeline from quote to running generator is usually 1 to 3 weeks, broken down as follows:
- Day 1: Free in-home estimate and load calculation
- Days 2–5: Permit application submitted to your municipality
- Days 5–14: Permit approval (varies by city — Denver and Centennial are typically faster than some suburban jurisdictions)
- Installation day: Generator placement, transfer switch installation, wiring, gas line connection, and testing — completed in a single visit
If your home requires a panel upgrade or a new gas line, add 1–2 additional days of work. The Electricians handles the permit process entirely — you don’t need to make a single call to the city. We schedule installation as soon as permits are approved and confirm the day before with a 2-hour arrival window.
