Flood Zones in the Western Connecticut Planning Region

A real October 2025 change, already written into Greenwich's own code

Public Act No. 25-33, effective October 1, 2025, removed Connecticut municipalities' prior option to exempt ordinary single-family home construction from Coastal Site Plan Review (CSPR) within the state's Coastal Area Management boundary, and separately expanded DEEP's mandatory referral role to cover coastal site plans that fall within a Special Flood Hazard Area. This isn't abstract for this region: Greenwich's own Planning & Zoning Commission approved a zoning amendment on August 4, 2026 specifically removing the town's prior single-family-residence exemption from its coastal site plan review process -- a direct, dated, local implementation of the new state requirement. A buyer planning new single-family construction on a shoreline parcel in Greenwich, Stamford, Darien, Norwalk, or Westport should expect this review step even where an older town practice or an agent's outdated understanding suggests it wouldn't apply.

Greenwich's own dedicated Flood & Erosion Control Board

Greenwich runs a standing Flood & Erosion Control Board, a body distinct from the town's Zoning Board of Appeals or Planning and Zoning Commission, administratively supported by the town's Department of Public Works Engineering Division. This is a genuinely town-specific governance structure, not a generic land-use board wearing a flood-related label -- a shoreline project in Greenwich touching flood or erosion control specifically may route through this board in addition to (not instead of) ordinary zoning and coastal site plan review. This region's other coastal towns were not confirmed in this research pass to run an equivalent dedicated flood board; Stamford's Environmental Protection Board is the closest analog found, handling flood information and resources more broadly rather than as a flood-and-erosion-specific body.

Real, quantified flood-insurance cost differences among this region's own coastal towns

FEMA's Community Rating System (CRS) gives every flood-insurance policyholder in a participating town an automatic discount, in 5% increments, based on that town's floodplain management practices -- and this region's 5 Long Island Sound towns are not uniform. Stamford has historically carried a CRS Class 7 rating, worth a 15% discount to its policyholders (per a Connecticut DEEP newsletter). Westport carries a CRS Class 8 rating: a 10% discount inside the Special Flood Hazard Area and 5% outside it. Norwalk, by contrast, currently sits at CRS Class 10 -- meaning it earns no CRS discount at all. This is a real, dollar-relevant fact for a buyer comparing an otherwise similar flood-zone property in Norwalk against one in neighboring Stamford or Westport: the ongoing insurance cost is not the same, independent of the home itself. Greenwich's and Darien's current individual CRS class were not confirmed in this research pass -- confirm directly with FEMA's CRS resources or the town before assuming either town's status.

Fairfield County as a whole carries a substantial historical flood-loss record: 12,619 NFIP flood insurance claims since 1978, totaling roughly $280.2 million in payouts, concentrated along the county's Long Island Sound shoreline -- a useful piece of market context (insurance cost, and lender flood-insurance requirements, reflect this real claims history, not just a property's current flood-zone label).

A real regional effort to fix this, confirmed inactive since 2019

The Western Connecticut Council of Governments (WestCOG) ran its own Regional CRS Program specifically to help member towns not yet active in CRS reduce flood-insurance costs, targeting Greenwich, Darien, Norwalk, and Danbury by name -- the 4 municipalities WestCOG identified as both inactive in CRS and carrying the region's highest total flood-insurance premiums. The program aimed for over 600 shared CRS credits region-wide (every 500 credits earned is worth roughly a 5% premium discount), with individual towns able to layer on their own additional activities for more. WestCOG's own site marks this program explicitly as not active as of April 1, 2019.

Norwalk's current CRS Class 10 / 0%-discount status, confirmed independently above, is a genuinely useful data point here: whatever the WestCOG-led regional effort achieved between roughly 2016 and 2019, it does not appear to have converted into an ongoing CRS discount for Norwalk today. For a buyer evaluating a flood-zone parcel in Greenwich or Darien specifically -- the other 2 towns the program targeted -- confirm each town's current CRS status directly rather than assuming either town's participation, or lack of it, based on this now-inactive regional program alone.