Across 151 permits filed since 2025-04-30, the median is $15,000; half of projects fall between $7,614 and $25,000. 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
- Remove existing shingles and replace with 24 square new architectural asphalt shingles following code and manufacturer’s recommendations. Install Ice and water shield as required by code and 4” polymer membrane tape on deck seams as necessGroton · 2026-10-30$20,699
- REMOVE AND REBUILD 16X12 PRESSURE TREATED DECK.Town of Waterford · 2026-10-29$21,000
- REMOVE EXISTING DECK AND CONSTRUCT TWO NEW DECKSTown of Waterford · 2026-10-29$40,000
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 $25,000. 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
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