FEMA flood zone rules in Wellesley, MA — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
Norfolk County has significant flood risk from the Neponset River, Weymouth Back River, and coastal areas. FEMA Flood Insurance Rate Maps (FIRMs) apply. Development in Special Flood Hazard Areas requires elevation certificates and flood zone compliance under Massachusetts and NFIP rules.
Norfolk County includes areas of significant flood risk, particularly along the Neponset River corridor (Quincy, Milton, Canton, Norwood), Weymouth Back River (Weymouth, Braintree), Fore River estuary, and coastal communities. FEMA designates flood zones on Flood Insurance Rate Maps (FIRMs) available at msc.fema.gov. Properties in FEMA-designated Special Flood Hazard Areas (SFHAs — Zone A or AE) are required to carry flood insurance if they have a federally backed mortgage. Development in SFHAs requires compliance with local floodplain management bylaws under the National Flood Insurance Program (NFIP). Massachusetts requires municipalities participating in the NFIP to adopt floodplain management regulations (typically in local zoning bylaws, Chapter 131 Wetlands Protection Act, and 310 CMR 10.00). Norfolk County itself does not administer NFIP compliance; each municipality administers its own floodplain bylaw through the local Conservation Commission and building department.
Building in floodplain without permit or below required base flood elevation: potential NFIP compliance violations, loss of community NFIP participation, fines under local bylaws.
Wellesley, MA
Wellesley allows garage conversions to ADUs under Wellesley Zoning Bylaw §5.13 (as amended April 15, 2025 by Article 40.1) consistent with Section 8 of the M...
Wellesley, MA
Wellesley regulates ADUs under Section 5.13 of the Wellesley Zoning Bylaw. At the April 2025 Annual Town Meeting, Wellesley adopted Article 40.1 to amend its...
Wellesley, MA
Wellesley's Building Department exempts one-story sheds/accessory buildings of 100 square feet or less from a building permit, but they must still comply wit...
Side-by-side rule comparisons with other cities in Norfolk County.
See how other cities in Norfolk County handle flood zones.
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