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Weymouth, MA Environmental Rules: Flood Zones (2026)

Heavy Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

FEMA flood zone rules in Weymouth, MA, also called floodplain regulations or special flood hazard area (SFHA) rules, determine flood insurance requirements and elevation standards for new construction.

Key Facts

Local Ordinance: Weymouth Wetlands Protection Ordinance Ch. 7-301
State Law: MGL c. 131 §40 (Wetlands Protection Act)
NFIP Participant: Yes
Wetland Buffer: 100 feet. Notice of Intent required
Flood Maps: FEMA FIRM: msc.fema.gov

FEMA Flood Zone Lookup

FEMA assigns every parcel in the U.S. a flood-hazard designation on its Flood Insurance Rate Maps (FIRMs). Zones starting with A or V are high-risk Special Flood Hazard Areas where federally backed mortgages require NFIP flood insurance. Zone X indicates moderate-to-minimal risk, where insurance is optional but often recommended. Your specific zone determines insurance cost, build elevation, and permit requirements in Weymouth, MA.

Zone	What it means	NFIP required?
A	High-risk flood area; 1% annual chance flood, no detailed analysis.	Yes
AE	High-risk; same as A but with established Base Flood Elevations.	Yes
AH	High-risk shallow flooding (1-3 ft), usually ponding.	Yes
AO	High-risk shallow flooding (1-3 ft) with sheet flow on sloping terrain.	Yes
V	High-risk coastal zone subject to wave action (no BFE).	Yes
VE	High-risk coastal zone with wave action and established BFEs.	Yes
X (shaded)	Moderate risk; between the 1% and 0.2% annual chance flood.	Recommended
X	Minimal risk; outside the 0.2% annual chance floodplain.	No

Look up Weymouth, MA on the FEMA flood map

FEMA maps update periodically; verify zone before buying flood insurance or building.

Summary

Weymouth is a coastal community with significant FEMA-designated flood zones along the Fore River, Back River, and coastal areas. The Weymouth Conservation Commission enforces wetlands protections under MGL c. 131 §40 and the Weymouth Wetlands Protection Ordinance (Ch. 7-301).

Section 40. No person shall remove, fill, dredge or alter any bank, riverfront area, fresh water wetland, coastal wetland, beach, dune, flat, marsh, meadow or swamp bordering on the ocean or on any estuary, creek, river, stream, pond, or lake, or any land under said waters or any land subject to tidal action, coastal storm flowage, or flooding, other than in the course of maintaining, repairing or replacing, but not substantially changing or enlarging, an existing and lawfully located structure or facility used in the service of the public and used to provide electric, gas, sewer, water, telep

Source: FEMA Flood Map Service CenterView official code

Full Breakdown

Weymouth has extensive coastal and riverine flood risk areas. The Weymouth Wetlands Protection Ordinance (Chapter 7-301) supplements state Wetlands Protection Act (MGL c. 131 §40) protections. Development within 100 feet of wetlands requires a Notice of Intent with the Conservation Commission. Weymouth participates in NFIP, enabling federally backed flood insurance. New construction in FEMA AE zones must be elevated to Base Flood Elevation (BFE) and may require an elevation certificate. Flood maps are available at msc.fema.gov.

Violations & Fines

Development in flood zones without proper permits can result in Conservation Commission stop orders, restoration requirements, and NFIP non-compliance.

Frequently Asked Questions

Is my property in a flood zone in Weymouth?

Do I need flood insurance in Weymouth?

Local Ordinance: Weymouth Wetlands Protection Ordinance Ch. 7-301. State Law: MGL c. 131 §40 (Wetlands Protection Act). NFIP Participant: Yes. Wetland Buffer: 100 feet. Notice of Intent required.

Sources & Official References

[1]FEMA Flood Map Service Center

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