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.

Model reviewed 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	Deep pages
Roof Replacement	$10,000 – $33,800	required	Cost·Permit
AC Replacement	$5,400 – $16,100	required	Cost·Permit
Fence Installation	$2,500 – $11,300	usually required	Cost·Permit
Water Heater Replacement	$1,200 – $5,600	required	Cost·Permit
Pool Installation	$39,600 – $119,700	required	Cost·Permit
Window Replacement	$7,900 – $35,800	required	Cost·Permit
Electrical Panel Replacement	$2,000 – $7,100	required	Cost·Permit
Generator Installation	$6,700 – $22,800	required	Cost·Permit
Solar Panel Installation	$15,700 – $50,200	required	Cost·Permit
Kitchen Remodel	$18,400 – $94,200	conditional	Cost·Permit
Bathroom Remodel	$9,200 – $43,000	conditional	Cost·Permit
Driveway Replacement	$4,300 – $19,500	usually required	Cost·Permit
Paver Patio & Walkway	$3,600 – $16,300	conditional	Cost·Permit
Deck Construction	$5,700 – $29,000	required	Cost·Permit
Shed Installation	$1,800 – $12,200	conditional	Cost·Permit
Whole-House Repipe	$4,600 – $16,500	required	Cost·Permit
EV Charger Installation	$800 – $4,300	required	Cost·Permit
Hurricane Shutter Installation	$3,400 – $18,900	required	Cost·Permit
Pool Enclosure / Screen Cage	$9,400 – $43,900	required	Cost·Permit
Septic System Replacement	$7,800 – $29,300	required	Cost·Permit
Impact Window Installation	$9,500 – $44,500	required	Cost·Permit
Exterior Door Replacement	$900 – $6,800	usually required	Cost·Permit
Garage Door Replacement	$1,500 – $7,800	required	Cost·Permit
Siding Installation	$8,300 – $39,400	usually required	Cost·Permit
Stucco Repair	$900 – $16,300	conditional	Cost·Permit
Soffit & Fascia Replacement	$1,900 – $11,400	conditional	Cost·Permit
Gutter Installation	$900 – $6,600	rarely required	Cost·Permit
Roof Repair	$400 – $5,000	conditional	Cost·Permit
Flat Roof Replacement	$6,300 – $29,400	required	Cost·Permit
Attic Insulation	$1,200 – $7,700	rarely required	Cost·Permit
Ductwork Replacement	$2,600 – $12,500	required	Cost·Permit
Mini Split Installation	$2,500 – $13,000	required	Cost·Permit
Flooring Installation	$2,500 – $20,300	rarely required	Cost·Permit
Tile Installation	$1,800 – $16,200	rarely required	Cost·Permit
Interior Painting	$1,500 – $9,600	rarely required	Cost·Permit
Exterior Painting	$2,800 – $15,200	rarely required	Cost·Permit
Drywall Repair	$400 – $4,500	rarely required	Cost·Permit
Kitchen Cabinet Refacing	$4,600 – $20,300	rarely required	Cost·Permit
Countertop Replacement	$2,200 – $12,300	rarely required	Cost·Permit
Tub to Shower Conversion	$3,600 – $16,400	usually required	Cost·Permit
Sod Installation	$900 – $7,100	rarely required	Cost·Permit
Irrigation System Installation	$2,200 – $10,200	conditional	Cost·Permit
Tree Removal	$500 – $5,600	conditional	Cost·Permit
Outdoor Kitchen	$6,200 – $46,300	usually required	Cost·Permit
Seawall Repair	$8,400 – $99,600	required	Cost·Permit
Dock Construction	$9,400 – $89,100	required	Cost·Permit
Well Installation	$5,700 – $26,000	required	Cost·Permit
Mold Remediation	$1,500 – $15,300	conditional	Cost·Permit
Water Softener Installation	$1,200 – $6,700	usually required	Cost·Permit
Home Addition	$47,300 – $294,000	required	Cost·Permit
Heat Pump Replacement	$6,700 – $22,800	required	Cost·Permit
Furnace Replacement	$3,300 – $11,900	required	Cost·Permit
Foundation Repair	$2,900 – $32,900	usually required	Cost·Permit
Basement Waterproofing	$3,100 – $18,400	conditional	Cost·Permit
Drain Field Replacement	$6,200 – $25,800	required	Cost·Permit
Toilet Installation	$300 – $1,100	rarely required	Cost·Permit
Hot Tub Installation	$5,700 – $22,600	usually required	Cost·Permit

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

Model vintage August 2026. The links above are the issuing agencies' own pages — we publish them so you can confirm the current rule yourself, not as evidence that each fact on this page was re-checked with them today. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing, not quotes. Permit rules change; confirm with the building department before starting work.