St. Johns County
Home permits and project costs in St. Augustine, FL
Historic district properties face additional design review that can add weeks to exterior projects.
Verified August 2026
Local cost index
+0%
vs national average
Permit fee index
+0%
vs national baseline
Population
14,329
Homeownership
55%
Do you need a permit in St. Augustine?
For most structural work, yes
St. Augustine enforces florida building code, 8th edition (2023) through St. Johns County. Roofing, electrical, plumbing, structural, pools and most exterior additions require a permit and inspection. Cosmetic work — paint, flooring, cabinet swaps — generally does not.
Project costs in St. Augustine
National baselines adjusted by the local labor and materials index.
| Project | Typical cost | Permit |
|---|---|---|
| Roof Replacement | $9,500 – $32,000 | required |
| AC Replacement | $5,200 – $15,500 | required |
| Fence Installation | $2,400 – $11,000 | usually required |
| Water Heater Replacement | $1,200 – $5,400 | required |
| Pool Installation | $38,000 – $115,000 | required |
| Window Replacement | $7,500 – $34,000 | required |
| Electrical Panel Replacement | $1,900 – $6,800 | required |
| Generator Installation | $6,500 – $22,000 | required |
| Solar Panel Installation | $15,000 – $48,000 | required |
| Kitchen Remodel | $18,000 – $92,000 | conditional |
| Bathroom Remodel | $9,000 – $42,000 | conditional |
| Driveway Replacement | $4,200 – $19,000 | usually required |
| Paver Patio & Walkway | $3,500 – $16,000 | conditional |
| Deck Construction | $5,500 – $28,000 | required |
| Shed Installation | $1,800 – $12,000 | conditional |
| Whole-House Repipe | $4,500 – $16,000 | required |
| EV Charger Installation | $800 – $4,200 | required |
| Hurricane Shutter Installation | $3,200 – $18,000 | required |
| Pool Enclosure / Screen Cage | $9,000 – $42,000 | required |
| Septic System Replacement | $7,500 – $28,000 | required |
| Impact Window Installation | $9,000 – $42,000 | required |
| Exterior Door Replacement | $900 – $6,500 | usually required |
| Garage Door Replacement | $1,400 – $7,500 | required |
| Siding Installation | $8,000 – $38,000 | usually required |
| Stucco Repair | $900 – $16,000 | conditional |
| Soffit & Fascia Replacement | $1,800 – $11,000 | conditional |
| Gutter Installation | $900 – $6,500 | rarely required |
| Roof Repair | $400 – $4,800 | conditional |
| Flat Roof Replacement | $6,000 – $28,000 | required |
| Attic Insulation | $1,200 – $7,500 | rarely required |
| Ductwork Replacement | $2,500 – $12,000 | required |
| Mini Split Installation | $2,400 – $12,500 | required |
| Flooring Installation | $2,500 – $20,000 | rarely required |
| Tile Installation | $1,800 – $16,000 | rarely required |
| Interior Painting | $1,500 – $9,500 | rarely required |
| Exterior Painting | $2,800 – $15,000 | rarely required |
| Drywall Repair | $400 – $4,500 | rarely required |
| Kitchen Cabinet Refacing | $4,500 – $20,000 | rarely required |
| Countertop Replacement | $2,200 – $12,000 | rarely required |
| Tub to Shower Conversion | $3,500 – $16,000 | usually required |
| Sod Installation | $900 – $7,000 | rarely required |
| Irrigation System Installation | $2,200 – $10,000 | conditional |
| Tree Removal | $500 – $5,500 | conditional |
| Outdoor Kitchen | $6,000 – $45,000 | usually required |
| Seawall Repair | $8,000 – $95,000 | required |
| Dock Construction | $9,000 – $85,000 | required |
| Well Installation | $5,500 – $25,000 | required |
| Mold Remediation | $1,500 – $15,000 | conditional |
| Water Softener Installation | $1,200 – $6,500 | usually required |
| Home Addition | $45,000 – $280,000 | required |
St. Augustine permitting basics
| Jurisdiction | St. Augustine, St. Johns County |
|---|---|
| Building department | Official site |
| Permit portal | Apply online |
| Owner-builder permits | Owner-builder exemption available on an owner-occupied home under FS 489.103(7) |
| Contractor verification | Verify any license with Florida Building Commission before signing |
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.