Flood Zones: Ayer vs Cambridge
How do flood zones rules compare between Ayer, MA and Cambridge, MA?
Ayer and Cambridge have similar restriction levels.
Ayer, MA
Middlesex County
Ayer's Floodplain Overlay District in Article 8 of the Zoning Bylaw regulates all FEMA Zone A and AE special flood hazard areas shown on the Middlesex County FIRM panels dated June 4, 2010, with new construction and encroachments generally prohibited.
View full Ayer rules →Cambridge, MA
Middlesex County
Cambridge participates in the National Flood Insurance Program and enforces a Flood Plain Overlay District covering FEMA Special Flood Hazard Areas along the Charles River and Alewife Brook.
View full Cambridge rules →Key Facts Comparison
| Fact | Ayer | Cambridge |
|---|---|---|
| Code Section | Zoning Bylaw Article 8 (FOD) | - |
| FEMA Zones | A and AE | - |
| FIRM Effective Date | June 4, 2010 | - |
| FIRM Panels | 25017C0203E-0217E (8 panels) | - |
| Standard | 780 CMR flood-resistant | - |
| Program | - | NFIP participant |
| Main flood areas | - | Charles, Alewife |
| Elevation | - | Above BFE plus freeboard |
| Insurance | - | Required for SFHA mortgages |
| Future risk | - | Climate Vuln Assessment |
Highlighted rows indicate differences between cities.
Ayer FAQ
Is my Ayer property in a flood zone?
Check FEMA's Map Service Center for Middlesex County FIRM panels effective June 4, 2010 to see if you are in Zone A or AE.
Can I build in Ayer's floodplain?
New construction in the Floodplain Overlay District is prohibited unless it meets 780 CMR flood-resistant standards and earns a special permit.
What FIRM panels cover Ayer?
Panels 25017C0203E, 0204E, 0208E, 0209E, 0211E, 0212E, 0216E, and 0217E, all dated June 4, 2010.
Cambridge FAQ
Is my Cambridge property in a flood zone?
Check the FEMA Map Service Center and the Cambridge GIS portal using your address to see FEMA zone designation.
Do I need flood insurance?
Federally-backed mortgages in SFHAs require flood insurance; it is recommended even in moderate-risk areas.
Compare other topics
See how Ayer and Cambridge compare on other ordinance categories.
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