Maine Setback Rules Law: Statewide Building Setbacks & Zoning Rules (2026)

Key Facts

Statute: 38 M.R.S. §§ 435-449-A
Great pond setback: 100 feet minimum
Stream setback: 75 feet minimum
Agency: Maine DEP
Daily penalty: Up to $25,000

Full Breakdown

The Mandatory Shoreland Zoning Act, 38 M.R.S. §§ 435-449-A, requires every Maine municipality to adopt a shoreland zoning ordinance regulating land within 250 feet of great ponds, rivers, and tidal waters and within 75 feet of certain streams. Principal structures must be set back at least 100 feet (horizontal) from the normal high-water line of great ponds and rivers flowing to great ponds, and at least 75 feet from other water bodies and coastal wetlands. The Department of Environmental Protection issues state guidelines and may impose its own ordinance if a town fails to comply. These setbacks apply statewide regardless of local zoning.

Violations & Penalties

Civil penalties of $100 to $25,000 per day under 38 M.R.S. § 349, plus mandatory restoration of vegetation and removal of non-conforming structures.

Frequently Asked Questions

How far from a Maine lake must a new house be built?

Principal structures must sit at least 100 feet horizontally from the normal high-water line of any great pond under the state Shoreland Zoning Act, regardless of which town the lot is in.

Can a Maine town allow shorter setbacks than state shoreland rules?

No. Towns may impose stricter setbacks but cannot reduce them below state minimums. DEP can override and impose its own ordinance if local standards fall short.

Maine Shoreland Zoning Setback Requirements Statewide