Generator Permit Requirements in St. Johns County, FL
St. Johns County Building Services issues all residential permits (building, electrical, mechanical, plumbing, roof, pool) for unincorporated county land outside the City of St. Augustine and City of St. Augustine Beach. Codes in force: Florida Building Code 8th Edition (2023) residential and building, NEC 2020, ASCE 7-22 wind design. County is in the wind-borne debris region (not HVHZ, which is only Miami-Dade and Broward). Impact-rated windows and doors or approved storm shutters required for residential openings. Septic permits handled by Florida Department of Health in St. Johns County at (904) 506-6081. Driveways on county roads go through St. Johns County Road and Bridge; driveways on US-1 or I-95 require FDOT approval. Historic district overlays may apply in some areas. Licensed FL CILB contractors required for most trades; owner-builder allowed under F.S. 489.103(7) for homesteaded primary residence with personal supervision affidavit.
By Joey, Founder · Last verified April 20, 2026 · How we research →
When you don’t need a Generator permit in St. Johns County
A portable generator used with extension cords does not require a permit. Hardwired transfer switches do require permits.
When you need a Generator permit in St. Johns County
A standby generator (natural gas or LP, with automatic transfer switch) requires electrical and mechanical permits. Florida-licensed electrician and gas contractor are required. The unit must be elevated above base flood elevation in the Special Flood Hazard Area and meet manufacturer setbacks from windows and openings.
Generator Permit Costs: St. Johns County vs. Nearby
St. Johns County runs higher than average for Florida. Expect $200 – $450 versus the state average of $158 – $848.
| City | Estimated Fee |
|---|---|
| St. Johns County | $200 – $450 |
| Jacksonville | $75 – $1,500 |
| Miami | $75 – $1,500 |
| Tampa | $75 – $1,500 |
Fees shown are estimates based on local building code data. Actual fees may vary based on project scope and valuation. See all St. Johns County permit costs →
Zoning & HOA Considerations
Standby generators are subject to setback requirements, typically 5 feet from any building opening (NFPA 37) and 3+ feet from property lines. Some jurisdictions require site plan review showing generator placement. Noise ordinances (typically 55-65 dBA daytime, 45-55 dBA nighttime) may affect placement.
If you live in an HOA community: hOAs often restrict generator placement, enclosures, and visibility. Some prohibit generators outright or require sound enclosures. Generators near pools, patios, or bedroom windows face the most scrutiny. Check CC&Rs before purchasing, a $6,000 generator that violates HOA rules is a major problem.
Estimated Project Timeline in St. Johns County
Here's a typical timeline for a generator project in St. Johns County, FL:
Timeline is based on St. Johns County's typical about 2 weeks permit processing time. Actual timelines vary by project complexity, completeness of application, and current department workload.
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Frequently Asked Questions
Estimated permit fees for Generator projects in St. Johns County, FL range from $200 – $450. Fees vary based on project scope and valuation.
It depends on the specifics of your project. Some smaller Generator projects may be exempt from permit requirements, while larger ones typically require a permit. Use our free lookup tool to check your specific situation.
Working without a required permit in St. Johns County can result in fines, stop-work orders, being required to remove completed work, and complications when selling your home. It's always best to check first.
Typical approval time for Generator permits in St. Johns County is about 2 weeks. More complex projects may take longer if plan review is required.
If you live in an HOA community, you may need architectural review approval in addition to a building permit. HOA rules and city building codes are separate, you may need to satisfy both. Review your CC&Rs and submit to your HOA's architectural review committee before starting work.
Learn More About Generator Permits
Read our complete guide covering permit requirements, costs, common exemptions, and the application process.
Read Generator Guide →