Massachusetts regulates all tidelands and coastal development statewide under Chapter 91 (MGL c.91) and 310 CMR 9.00, requiring state licenses for structures and fill in tidelands regardless of municipality.
MGL c.91, the Public Waterfront Act, requires a state license from MassDEP for any fill, structure, or change of use in tidelands, Great Ponds, and navigable waters. Implementing regulations at 310 CMR 9.00 establish uniform standards for water-dependent uses, public access, and historic public rights. The Massachusetts Office of Coastal Zone Management provides federal consistency review under the Coastal Zone Management Act. Local approvals do not substitute for required Chapter 91 licenses.
Unlicensed structures or fill can be ordered removed at the owner's expense, with fines up to $25,000 per day under MGL c.21A §16 and Chapter 91 enforcement.
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