Kent County

Home permits and project costs in Dover, DE

Dover sits in Kent County, Delaware. Deep frost lines, snow load and a very old housing stock mean permits frequently touch structural, electrical and energy-code upgrades at once. Work outside city limits is permitted by the county building department rather than the city.

Model reviewed August 2026

Local cost index

+2%

vs national average

Permit fee index

-10%

vs national baseline

Population

39,403

Homeownership

Do you need a permit in Dover?

For most structural work, yes

Dover enforces local adoption of the irc by county and municipality through Kent 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 Dover

National baselines adjusted by the local labor and materials index.

Project	Typical cost	Permit	Deep pages
Roof Replacement	$9,900 – $33,300	required	Cost·Permit
AC Replacement	$5,400 – $16,000	required	Cost·Permit
Fence Installation	$2,500 – $11,400	usually required	Cost·Permit
Water Heater Replacement	$1,200 – $5,600	required	Cost·Permit
Pool Installation	$39,400 – $119,100	required	Cost·Permit
Window Replacement	$7,800 – $35,300	required	Cost·Permit
Electrical Panel Replacement	$2,000 – $7,000	required	Cost·Permit
Generator Installation	$6,700 – $22,700	required	Cost·Permit
Solar Panel Installation	$15,500 – $49,700	required	Cost·Permit
Kitchen Remodel	$18,500 – $94,700	conditional	Cost·Permit
Bathroom Remodel	$9,300 – $43,200	conditional	Cost·Permit
Driveway Replacement	$4,300 – $19,600	usually required	Cost·Permit
Paver Patio & Walkway	$3,600 – $16,500	conditional	Cost·Permit
Deck Construction	$5,700 – $29,000	required	Cost·Permit
Shed Installation	$1,900 – $12,300	conditional	Cost·Permit
Whole-House Repipe	$4,700 – $16,500	required	Cost·Permit
EV Charger Installation	$800 – $4,300	required	Cost·Permit
Hurricane Shutter Installation	$3,300 – $18,700	required	Cost·Permit
Pool Enclosure / Screen Cage	$9,300 – $43,600	required	Cost·Permit
Septic System Replacement	$7,800 – $29,000	required	Cost·Permit
Impact Window Installation	$9,400 – $43,700	required	Cost·Permit
Exterior Door Replacement	$900 – $6,700	usually required	Cost·Permit
Garage Door Replacement	$1,500 – $7,800	required	Cost·Permit
Siding Installation	$8,300 – $39,300	usually required	Cost·Permit
Stucco Repair	$900 – $16,500	conditional	Cost·Permit
Soffit & Fascia Replacement	$1,900 – $11,400	conditional	Cost·Permit
Gutter Installation	$900 – $6,700	rarely required	Cost·Permit
Roof Repair	$400 – $5,000	conditional	Cost·Permit
Flat Roof Replacement	$6,200 – $29,100	required	Cost·Permit
Attic Insulation	$1,200 – $7,700	rarely required	Cost·Permit
Ductwork Replacement	$2,600 – $12,400	required	Cost·Permit
Mini Split Installation	$2,500 – $12,900	required	Cost·Permit
Flooring Installation	$2,600 – $20,500	rarely required	Cost·Permit
Tile Installation	$1,800 – $16,400	rarely required	Cost·Permit
Interior Painting	$1,500 – $9,800	rarely required	Cost·Permit
Exterior Painting	$2,900 – $15,400	rarely required	Cost·Permit
Drywall Repair	$400 – $4,600	rarely required	Cost·Permit
Kitchen Cabinet Refacing	$4,600 – $20,500	rarely required	Cost·Permit
Countertop Replacement	$2,300 – $12,300	rarely required	Cost·Permit
Tub to Shower Conversion	$3,600 – $16,500	usually required	Cost·Permit
Sod Installation	$900 – $7,200	rarely required	Cost·Permit
Irrigation System Installation	$2,300 – $10,300	conditional	Cost·Permit
Tree Removal	$500 – $5,700	conditional	Cost·Permit
Outdoor Kitchen	$6,200 – $46,400	usually required	Cost·Permit
Seawall Repair	$8,300 – $98,600	required	Cost·Permit
Dock Construction	$9,300 – $88,200	required	Cost·Permit
Well Installation	$5,700 – $25,900	required	Cost·Permit
Mold Remediation	$1,500 – $15,500	conditional	Cost·Permit
Water Softener Installation	$1,200 – $6,700	usually required	Cost·Permit
Home Addition	$46,700 – $290,600	required	Cost·Permit
Heat Pump Replacement	$6,700 – $22,700	required	Cost·Permit
Furnace Replacement	$3,300 – $11,900	required	Cost·Permit
Foundation Repair	$2,900 – $33,000	usually required	Cost·Permit
Basement Waterproofing	$3,100 – $18,500	conditional	Cost·Permit
Drain Field Replacement	$6,200 – $25,900	required	Cost·Permit
Toilet Installation	$300 – $1,100	rarely required	Cost·Permit
Hot Tub Installation	$5,700 – $22,700	usually required	Cost·Permit

Dover permitting basics

Jurisdiction	Dover, Kent County
Building department	Confirm with the city or county
Permit portal	No verified online portal on file
Owner-builder permits	Owner-builder permits generally allowed
Contractor verification	Verify any license with Delaware Division of Small Business before signing

Sources

Sources & verification

Delaware Division of Small Business

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.