Maine Tiny Homes Law: Statewide Accessory Structures Rules (2026)

Key Facts

Code section: IRC Appendix Q
Maximum size: 400 square feet
Foundation type: Permanent required
THOW status: Treated as RV
Authority: 10 MRSA 9722

Full Breakdown

The Maine Uniform Building and Energy Code under 10 MRSA section 9722 incorporates IRC Appendix Q, which sets construction standards for tiny houses on permanent foundations 400 square feet or less. Loft ceiling heights, ladder access, and emergency egress requirements are explicitly modified for tiny homes. Tiny houses on wheels are regulated as recreational vehicles under 29-A MRSA section 101 and cannot serve as permanent dwellings unless local zoning expressly allows. Municipalities cannot impose building standards inconsistent with MUBEC for tiny homes on foundations.

Violations & Penalties

MUBEC violations carry fines up to $1,000 per offense. Occupying a tiny house on wheels as a permanent dwelling without zoning approval can trigger local zoning enforcement.

Frequently Asked Questions

Can I live full-time in a tiny house on wheels in Maine?

State law treats tiny homes on wheels as RVs. Permanent occupancy depends on local zoning, which usually limits RV residency to 120 days or specific RV parks.

Does MUBEC tiny home code apply in towns without zoning?

MUBEC building standards apply in towns over 4,000 population and in any town that has voluntarily adopted the code. Smaller towns may follow local rules.

Maine Tiny Home Code Recognized Statewide