Harrison County

Home permits and project costs in Biloxi, MS

Biloxi sits in Harrison County, Mississippi. Hurricane wind design, wind-borne debris protection and floodplain review add product-approval and inspection steps to most exterior work. Work outside city limits is permitted by the county building department rather than the city.

Model reviewed August 2026

Local cost index

-18%

vs national average

Permit fee index

-25%

vs national baseline

Population

49,449

Homeownership

Do you need a permit in Biloxi?

For most structural work, yes

Biloxi enforces local adoption of the irc; coastal counties enforce wind requirements through Harrison 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 Biloxi

National baselines adjusted by the local labor and materials index.

Project	Typical cost	Permit	Deep pages
Roof Replacement	$7,700 – $26,000	required	Cost·Permit
AC Replacement	$4,300 – $12,900	required	Cost·Permit
Fence Installation	$2,000 – $9,100	usually required	Cost·Permit
Water Heater Replacement	$1,000 – $4,400	required	Cost·Permit
Pool Installation	$30,800 – $93,300	required	Cost·Permit
Window Replacement	$6,200 – $28,300	required	Cost·Permit
Electrical Panel Replacement	$1,500 – $5,500	required	Cost·Permit
Generator Installation	$5,300 – $17,800	required	Cost·Permit
Solar Panel Installation	$12,800 – $41,000	required	Cost·Permit
Kitchen Remodel	$15,200 – $77,600	conditional	Cost·Permit
Bathroom Remodel	$7,500 – $35,100	conditional	Cost·Permit
Driveway Replacement	$3,400 – $15,500	usually required	Cost·Permit
Paver Patio & Walkway	$2,900 – $13,200	conditional	Cost·Permit
Deck Construction	$4,500 – $22,800	required	Cost·Permit
Shed Installation	$1,500 – $9,900	conditional	Cost·Permit
Whole-House Repipe	$3,600 – $12,800	required	Cost·Permit
EV Charger Installation	$600 – $3,400	required	Cost·Permit
Hurricane Shutter Installation	$2,600 – $14,600	required	Cost·Permit
Pool Enclosure / Screen Cage	$7,300 – $33,900	required	Cost·Permit
Septic System Replacement	$6,100 – $22,700	required	Cost·Permit
Impact Window Installation	$7,500 – $34,900	required	Cost·Permit
Exterior Door Replacement	$700 – $5,300	usually required	Cost·Permit
Garage Door Replacement	$1,100 – $6,100	required	Cost·Permit
Siding Installation	$6,500 – $31,100	usually required	Cost·Permit
Stucco Repair	$700 – $13,200	conditional	Cost·Permit
Soffit & Fascia Replacement	$1,500 – $9,000	conditional	Cost·Permit
Gutter Installation	$700 – $5,400	rarely required	Cost·Permit
Roof Repair	$300 – $3,800	conditional	Cost·Permit
Flat Roof Replacement	$4,900 – $22,700	required	Cost·Permit
Attic Insulation	$1,000 – $6,500	rarely required	Cost·Permit
Ductwork Replacement	$2,100 – $10,000	required	Cost·Permit
Mini Split Installation	$2,000 – $10,400	required	Cost·Permit
Flooring Installation	$2,100 – $16,800	rarely required	Cost·Permit
Tile Installation	$1,500 – $13,100	rarely required	Cost·Permit
Interior Painting	$1,200 – $7,600	rarely required	Cost·Permit
Exterior Painting	$2,200 – $12,000	rarely required	Cost·Permit
Drywall Repair	$300 – $3,600	rarely required	Cost·Permit
Kitchen Cabinet Refacing	$3,700 – $16,500	rarely required	Cost·Permit
Countertop Replacement	$1,900 – $10,300	rarely required	Cost·Permit
Tub to Shower Conversion	$2,800 – $13,000	usually required	Cost·Permit
Sod Installation	$800 – $5,900	rarely required	Cost·Permit
Irrigation System Installation	$1,800 – $8,200	conditional	Cost·Permit
Tree Removal	$400 – $4,300	conditional	Cost·Permit
Outdoor Kitchen	$4,900 – $36,800	usually required	Cost·Permit
Seawall Repair	$6,400 – $76,300	required	Cost·Permit
Dock Construction	$7,200 – $68,300	required	Cost·Permit
Well Installation	$4,400 – $20,100	required	Cost·Permit
Mold Remediation	$1,200 – $11,900	conditional	Cost·Permit
Water Softener Installation	$1,000 – $5,300	usually required	Cost·Permit
Home Addition	$36,500 – $226,800	required	Cost·Permit
Heat Pump Replacement	$5,400 – $18,300	required	Cost·Permit
Furnace Replacement	$2,700 – $9,600	required	Cost·Permit
Foundation Repair	$2,300 – $26,300	usually required	Cost·Permit
Basement Waterproofing	$2,500 – $14,900	conditional	Cost·Permit
Drain Field Replacement	$4,900 – $20,200	required	Cost·Permit
Toilet Installation	$200 – $900	rarely required	Cost·Permit
Hot Tub Installation	$4,500 – $18,000	usually required	Cost·Permit

Biloxi permitting basics

Jurisdiction	Biloxi, Harrison County
Building department	Confirm with the city or county
Permit portal	No verified online portal on file
Owner-builder permits	Homeowner permits widely allowed
Contractor verification	Verify any license with Mississippi State Fire Marshal before signing

Sources

Sources & verification

Mississippi State Fire Marshal

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.