ME · State directory
Maine ADU rules
Official accessory dwelling unit regulations for 12 jurisdictions in Maine, plus statewide law.
Not sure which city yet?
We have read the ordinances for 12 Maine cities and lined them up side by side: detached vs internal, size limits, owner occupancy, and approval process.
Statewide ADU law
Maine has state-level ADU legislation that applies across local jurisdictions. Local rules below may add requirements on top of state law.
Cities
Auburn3 sources · verified August 2026Augusta4 sources · verified August 2026Bangor5 sources · verified August 2026Bar Harbor5 sources · verified August 2026Biddeford3 sources · verified August 2026Brunswick6 sources · verified August 2026Lewiston4 sources · verified August 2026Portland6 sources · verified August 2026Saco4 sources · verified August 2026Sanford5 sources · verified August 2026Scarborough5 sources · verified August 2026South Portland5 sources · verified August 2026
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