Across 41 permits filed since 2025-01-25, the median is $26,864; half of projects fall between $17,000 and $38,000. 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 Norwalk, CT actually reported when they pulled permits.
Recent filings
- REMOVE AND REPLACE SIDING ON THE ENTIRE HOUSE, 19.2 SF VINYL SIDING, BOARD AND BATTERN SHINGLE 8" IN COLONIAL WHITE ON THE FRONT AND THE BACK TRIPLE 5" IN COLONIAL W, INSTALL CERTAIN WRAP HOUSE 1/2" SHIPLAPPED POLYSTYRENE INSULATION, STACity of Norwalk · 2026-07-08$20,000
- REMOVE EXISTING SIDING, INSTALL INSULATION ON ENTIRE HOUSE TAPE SEAMS ON INSULATION, INSTALL ALL VINYL ACCESSORIES, INSTALL NEW VINYL SIDING.City of Norwalk · 2026-07-06$15,000
- REMOVE EXISTING SIDING TO WOOD/INSTALL NEW D4 VINYL SIDING 345 SFCity of Norwalk · 2026-07-02$16,103
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 siding permits in Norwalk, CT came in between $17,000 and $38,000. We exclude permits under $1,000, jobs filed as whole-house construction, and counties whose building departments don't reliably report valuations.