Knox County

Home permits and project costs in Knoxville, TN

Knoxville sits in Knox County, Tennessee. Long cooling seasons and sustained humidity push HVAC sizing, attic ventilation and moisture detailing to the front of most exterior projects. Work outside city limits is permitted by the county building department rather than the city.

Model reviewed August 2026

Local cost index

-8%

vs national average

Permit fee index

-12%

vs national baseline

Population

192,648

Homeownership

Do you need a permit in Knoxville?

For most structural work, yes

Knoxville enforces tennessee residential code, based on the irc through Knox 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 Knoxville

National baselines adjusted by the local labor and materials index.

Project	Typical cost	Permit	Deep pages
Roof Replacement	$8,900 – $30,100	required	Cost·Permit
AC Replacement	$4,900 – $14,600	required	Cost·Permit
Fence Installation	$2,200 – $10,300	usually required	Cost·Permit
Water Heater Replacement	$1,100 – $5,000	required	Cost·Permit
Pool Installation	$35,400 – $107,200	required	Cost·Permit
Window Replacement	$7,100 – $32,200	required	Cost·Permit
Electrical Panel Replacement	$1,800 – $6,300	required	Cost·Permit
Generator Installation	$6,000 – $20,500	required	Cost·Permit
Solar Panel Installation	$14,300 – $45,700	required	Cost·Permit
Kitchen Remodel	$16,900 – $86,400	conditional	Cost·Permit
Bathroom Remodel	$8,400 – $39,300	conditional	Cost·Permit
Driveway Replacement	$3,900 – $17,700	usually required	Cost·Permit
Paver Patio & Walkway	$3,300 – $14,900	conditional	Cost·Permit
Deck Construction	$5,100 – $26,100	required	Cost·Permit
Shed Installation	$1,700 – $11,100	conditional	Cost·Permit
Whole-House Repipe	$4,100 – $14,800	required	Cost·Permit
EV Charger Installation	$700 – $3,900	required	Cost·Permit
Hurricane Shutter Installation	$3,000 – $16,800	required	Cost·Permit
Pool Enclosure / Screen Cage	$8,400 – $39,200	required	Cost·Permit
Septic System Replacement	$7,000 – $26,200	required	Cost·Permit
Impact Window Installation	$8,500 – $39,900	required	Cost·Permit
Exterior Door Replacement	$800 – $6,100	usually required	Cost·Permit
Garage Door Replacement	$1,300 – $7,000	required	Cost·Permit
Siding Installation	$7,500 – $35,500	usually required	Cost·Permit
Stucco Repair	$800 – $14,900	conditional	Cost·Permit
Soffit & Fascia Replacement	$1,700 – $10,300	conditional	Cost·Permit
Gutter Installation	$800 – $6,000	rarely required	Cost·Permit
Roof Repair	$400 – $4,400	conditional	Cost·Permit
Flat Roof Replacement	$5,600 – $26,200	required	Cost·Permit
Attic Insulation	$1,100 – $7,100	rarely required	Cost·Permit
Ductwork Replacement	$2,400 – $11,300	required	Cost·Permit
Mini Split Installation	$2,300 – $11,800	required	Cost·Permit
Flooring Installation	$2,300 – $18,700	rarely required	Cost·Permit
Tile Installation	$1,700 – $14,800	rarely required	Cost·Permit
Interior Painting	$1,400 – $8,700	rarely required	Cost·Permit
Exterior Painting	$2,600 – $13,700	rarely required	Cost·Permit
Drywall Repair	$300 – $4,100	rarely required	Cost·Permit
Kitchen Cabinet Refacing	$4,200 – $18,500	rarely required	Cost·Permit
Countertop Replacement	$2,100 – $11,300	rarely required	Cost·Permit
Tub to Shower Conversion	$3,200 – $14,800	usually required	Cost·Permit
Sod Installation	$800 – $6,600	rarely required	Cost·Permit
Irrigation System Installation	$2,000 – $9,300	conditional	Cost·Permit
Tree Removal	$400 – $5,000	conditional	Cost·Permit
Outdoor Kitchen	$5,600 – $41,900	usually required	Cost·Permit
Seawall Repair	$7,500 – $88,500	required	Cost·Permit
Dock Construction	$8,400 – $79,200	required	Cost·Permit
Well Installation	$5,100 – $23,200	required	Cost·Permit
Mold Remediation	$1,400 – $13,800	conditional	Cost·Permit
Water Softener Installation	$1,100 – $6,000	usually required	Cost·Permit
Home Addition	$42,100 – $262,100	required	Cost·Permit
Heat Pump Replacement	$6,100 – $20,700	required	Cost·Permit
Furnace Replacement	$3,000 – $10,800	required	Cost·Permit
Foundation Repair	$2,600 – $29,800	usually required	Cost·Permit
Basement Waterproofing	$2,800 – $16,800	conditional	Cost·Permit
Drain Field Replacement	$5,600 – $23,200	required	Cost·Permit
Toilet Installation	$200 – $1,000	rarely required	Cost·Permit
Hot Tub Installation	$5,100 – $20,500	usually required	Cost·Permit

Knoxville permitting basics

Jurisdiction	Knoxville, Knox County
Building department	Confirm with the city or county
Permit portal	No verified online portal on file
Owner-builder permits	Homeowner permits allowed on owner-occupied property
Contractor verification	Verify any license with Tennessee State Fire Marshal's Office before signing

Sources

Sources & verification

Tennessee State Fire Marshal's Office

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.