Maine Coastal Development Law: Statewide Environmental Rules Rules (2026)

Key Facts

Shoreland zone width: 250 feet
Statute: 38 M.R.S. §§ 435-449
Stream zone: 75 feet
State backstop rule: DEP Chapter 1000

Full Breakdown

Under 38 M.R.S. sections 435-449 and DEP Chapter 1000 (Guidelines for Municipal Shoreland Zoning Ordinances), every Maine municipality must adopt and enforce shoreland zoning within 250 feet of the normal high-water line of great ponds, rivers, the ocean, and significant wetlands, and within 75 feet of certain streams. Standards address minimum lot size, setbacks (typically 75-100 feet), vegetative buffer retention, impervious surface limits, and structure expansion limits. The DEP reviews and approves all local ordinances; if a town fails to adopt compliant rules, the state imposes Chapter 1000 directly. The Natural Resources Protection Act adds permits for activities in or adjacent to protected resources.

Violations & Penalties

Unpermitted shoreland alteration can result in DEP penalties, mandatory restoration, criminal charges for willful violations, and daily fines until corrected.

Frequently Asked Questions

Can a Maine town opt out of shoreland zoning?

No. Shoreland zoning is mandatory for every municipality with qualifying waters. If a town fails to adopt compliant rules, Maine DEP applies state Chapter 1000 standards directly.

How close to the water can I build in Maine?

Most principal structures must be set back at least 75 to 100 feet from the normal high-water line, with stricter setbacks in resource protection districts and limits on tree clearing.

Maine Mandatory Shoreland Zoning and Coastal Development Law