Electrical
Generator Installation: Cost, Permits & Timeline
Installing a permanently mounted standby generator with an automatic transfer switch, concrete or composite pad, and a natural gas or propane fuel supply.
Verified August 2026
Typical cost
$12,400
$6,500 – $22,000
per standby generator installed
$6,500 – $22,000
Permit
Required
$150 – $600
Timeline
2-3 days of work
2-3 days of work, 3-8 weeks including permitting and gas service
Do you need a permit for generator installation?
Yes
Generator Installation is permitted and inspected work in nearly every jurisdiction. Typical fees run $150 to $600, and a licensed contractor generally has to pull the permit.
What drives the cost
- Generator size in kW (whole-home versus essential circuits)
- Automatic transfer switch type and amperage
- Fuel: natural gas tap versus buried propane tank
- Distance from the panel and trenching
- Pad, anchoring and wind-load requirements
Permit, inspections and documents
| Permit status | required |
|---|---|
| Typical permit fee | $150 – $600 |
| Licensed contractor required | Usually yes |
| Owner-builder allowed | Rarely |
| Inspections | Slab / pad inspection, Electrical rough, Gas line pressure test, Final inspection |
| Timeline | 2-3 days of work, 3-8 weeks including permitting and gas service |
| DIY difficulty | 5/5 difficulty |
Documents typically required
- • Building, electrical and gas permit applications
- • Site plan showing generator location and setbacks
- • Equipment specification and transfer switch details
- • Wind-load anchoring detail for the pad
Generator Installation cost by city
Local labor and material pricing applied to the national baseline.
| City | Typical range | vs national |
|---|---|---|
| Miami | $7,700 – $26,000 | +18% |
| Tampa | $6,800 – $22,900 | +4% |
| Orlando | $6,600 – $22,400 | +2% |
| Fort Lauderdale | $7,400 – $25,100 | +14% |
| Jacksonville | $6,200 – $21,100 | -4% |
| West Palm Beach | $7,300 – $24,600 | +12% |
| St. Petersburg | $6,700 – $22,700 | +3% |
| Fort Myers | $7,100 – $24,000 | +9% |
| Cape Coral | $7,000 – $23,500 | +7% |
| Sarasota | $7,000 – $23,800 | +8% |
| Naples | $8,100 – $27,300 | +24% |
| Port St. Lucie | $6,600 – $22,400 | +2% |
Frequently asked questions
Do I need a permit for a whole-house generator?
Yes. Standby generator installations in Florida generally require building, electrical and gas or fuel permits, plus setback review for the equipment location and a wind-rated anchoring detail.
What size generator do I need?
Essential-circuit coverage typically needs 10-14 kW, while whole-home coverage for a Florida house with central AC usually needs 20-26 kW. Sizing depends on your AC tonnage, water heater type and well pump if present.
Sources
Sources & verification
Last verified August 2026. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing — they are not quotes. Permit rules change; confirm with the building department before starting work.