Across 127 permits filed since 2025-03-12, the median is $15,000; half of projects fall between $7,614 and $24,650. Figures are permit valuations reported to building departments. National cost guides answer this question with averages from other markets; these numbers are what homeowners in New London County, CT actually reported when they pulled permits.
Recent filings
- Building of house CALCULATED FEES INCLUDE PLUMBING, ELECTRIC, AND HVAC SEE ZONING. PROVIDE ENERGY CONSERVATION COMPLIANCE DOCUMENTS. CLARIFY FILL REQUIREMENTS--ENGINEERING SUPERVISION MAY BE REQUIRED. PROVIDE DOOR AND WINDOW SCHEDULE, IMontville · 2026-09-10$300,000
- NEW DECK 14' X 7'Town of Waterford · 2026-09-04$18,000
- 18' x 16' deck composite decking, vinyl railingsTown of Waterford · 2026-09-04$11,500
How to read these numbers
Permit valuations are the project cost the applicant reports to the building department. They skew slightly low — nobody rounds up for the permit fee — and scope varies, so the middle-half range is the honest picture: half of all deck permits in New London County, CT came in between $7,614 and $24,650. We exclude permits under $1,000, jobs filed as whole-house construction, and counties whose building departments don't reliably report valuations.
Same project, other places
Deck in New JerseyDeck in New YorkDeck in ConnecticutDeck on Long Island