Every home addition in Florida requires building permits. There are no exceptions — not for covered patios, not for small room additions, not for Florida rooms, and definitely not for ADUs or second stories. The permitting process can feel opaque if you have never been through it, so here is a practical guide to how it works in Northeast Florida.
What Permits Does a Home Addition Require?
A typical home addition requires multiple permits under one master building permit:
- Building permit — The primary permit covering structural construction
- Electrical permit — For all new wiring, outlets, and panel work
- Plumbing permit — For any new plumbing lines, fixtures, or connections
- Mechanical permit — For HVAC installation or extension
- Engineering — Structural engineering plans signed and sealed by a Florida PE (professional engineer)
Wilson & Co pulls all required permits as part of our standard process. You do not need to visit the building department or file any paperwork yourself.
Permit Timeline by County
| Jurisdiction | Typical Review Time | Notes |
|---|---|---|
| St. Johns County | 4-8 weeks | Electronic submission, plan review by third party |
| Duval County (Jacksonville) | 3-6 weeks | Online portal available |
| Flagler County | 4-6 weeks | Smaller volume, generally responsive |
These timelines are for initial review. If revisions are required, add 1-3 weeks per revision cycle. Submitting complete, well-prepared packages minimizes revision requests — which is why we invest time in thorough plan preparation.
What the Building Department Reviews
The building department checks your plans against the Florida Building Code (FBC) for:
- Structural integrity — Can the addition withstand Florida wind loads (140+ mph in our area)?
- Setbacks — Is the addition far enough from property lines?
- Lot coverage — Does the total building footprint exceed the maximum allowed for your lot?
- Height — Does the addition comply with height restrictions?
- Flood zone — Is the addition compliant with FEMA flood requirements?
- Energy code — Does the addition meet Florida’s energy efficiency requirements?
- Accessibility — Does the addition comply with ADA requirements (if applicable)?
Inspections During Construction
Once permitted, the building department inspects work at key milestones:
- Foundation — Before pouring concrete or placing footings
- Framing — After structural framing is complete, before drywall
- Rough mechanical — Plumbing, electrical, and HVAC before walls are closed
- Insulation — Before drywall installation
- Final — Complete inspection of the finished addition
Failing an inspection means correcting the issue and re-scheduling — which adds time and cost. Wilson & Co’s inspection pass rate is consistently high because we build to code from the start, not just close enough to pass.
What Happens If You Build Without a Permit?
Building without permits in Florida creates serious problems:
- No certificate of occupancy — The addition cannot be legally occupied
- Insurance issues — Your homeowner’s insurance may not cover unpermitted work
- Resale problems — Buyers’ inspectors and appraisers will flag unpermitted additions
- Enforcement action — The county can require you to demolish unpermitted work
- Retroactive permitting — Getting permits after the fact is more expensive and may require opening finished walls for inspection
The permitting process exists to protect homeowners. Wilson & Co handles all permitting as a standard part of every project.
Start Your Addition Project
Call (904) 792-6175 for a free consultation. We handle design, engineering, permitting, and construction under one contract.
Ready to Start Your Project?
Contact Wilson & Co Design Build for a free consultation on your remodeling project.