Tiny home rules in Cumberland County, ME — covering tiny houses on wheels (THOWs), park model RVs, and tiny home on foundation builds — determine where they are legal and how they get permitted.
Cumberland County has no tiny-home ordinance. State law treats site-built tiny homes under MUBEC Appendix Q (IRC), manufactured tiny homes under 30-A MRS §4358 manufactured-housing parity, and tiny homes used as ADUs under the LD 2003 mandate at 30-A MRS §4364-A. Tiny homes on wheels (THOWs) are RVs under Maine law and cannot be permanent dwellings.
Cumberland County does not regulate housing. Three state-law pathways determine whether a tiny home is legal in any Cumberland County municipality. (1) Site-built tiny homes on a permanent foundation: MUBEC incorporates IRC Appendix Q (Tiny Houses), which permits dwellings ≤400 sq ft of floor area with reduced ceiling heights, ladder access to lofts, and emergency-egress windows in lofts. Municipalities cannot reject MUBEC-compliant designs. (2) Manufactured/HUD-Code tiny homes: Under 30-A MRS §4358, every municipality shall allow manufactured housing on individual house lots wherever single-family dwellings are allowed; municipalities may impose pitched-roof, permanent-foundation, and residential-siding standards but may not prohibit based on date of manufacture or size. (3) Tiny home as ADU: Under 30-A MRS §4364-A (LD 2003), at least one ADU must be allowed in any single-family zone; a tiny home meeting MUBEC qualifies. (4) Tiny homes on wheels (RVIA-certified or unstamped trailers) are recreational vehicles under 29-A MRS Chapter 19; they may not be used as permanent dwellings on residential lots and are restricted to licensed campgrounds under 22 MRS §2491-A and DHHS rules. Shoreland Zoning Act setbacks (38 MRS §435) apply to any tiny-home structure within 250 ft of protected waters.
Use of an RV/THOW as a permanent dwelling is enforced by the municipal CEO under 30-A MRS §4452 at $100–$2,500/day. Operating an unlicensed campground violates 22 MRS §2491-A. A municipal denial of a MUBEC-compliant tiny home, a manufactured-housing tiny home in a single-family zone, or a tiny-home ADU is preempted by state law and may be challenged in Superior Court under Rule 80B.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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