ADUs & Tiny Homes in Maine
100% MUBEC Compliant, fully plumbed, and engineered for deep winter thermal retention. Whether you are looking to build a high-yield rental property on your lot, or seeking a permanent, superior alternative to a traditional "tiny home on wheels", we provide a turn-key solution.
The "Done-For-You" Concierge Process
We do not just drop a box on your lawn. We manage the entire lifecycle.
Zoning & LD 2003 Checks
Municipal Approvals
Foundation & Utilities
Delivered & Hooked Up
Transparent ADU Project Pricing
No hidden backend costs. Know exactly what to expect.
Pricing examples shown here reflect representative layouts and finishes. Your ADU is custom designed for your property constraints and project goals.
ADU 240 (Studio)
ADU 400 (1 Bed)
*Total Estimated Cost includes municipal permitting, standard foundation preparation, and core utility trenching. This is an average based on typical Maine properties.
Model Your Rental Payback
Compare long-term rental income, seasonal rental assumptions, and projected payback before you request an assessment.
Featured ADU Planning Guides
Cost Guide
ADU Cost in Maine (2026): Full Breakdown
A practical Maine ADU cost breakdown covering unit price, permitting, site prep, and utility work - anchored on Place's ADU 240 and ADU 400 models so you can build a realistic total-installed budget before requesting bids.
Permitting Guide
ADU Permit Process in Maine: Step-by-Step
A practical step-by-step ADU permitting guide for Maine homeowners: who reviews what, the documents you need, typical phase durations, and how LD 2003 changed the process.
ROI Guide
Maine ADU ROI: Long-Term Rental vs Short-Term Rental
Honest payback math for a Place 400 sqft ADU in Maine, comparing Portland long-term rental to Old Orchard Beach short-term rental, with the regulatory and operating-effort tradeoffs that move the numbers.
Frequently Asked Questions About ADUs in Maine
What is an ADU in Maine?
An ADU (Accessory Dwelling Unit) is a self-contained living space on the same lot as a primary residence. In Maine, ADUs include fully plumbed kitchens, bathrooms, and sleeping areas. They can be used as rental properties, in-law suites, or independent living quarters.
How much does it cost to build an ADU in Maine?
Place Buildings ADUs start at $79,900 for the fully finished price of a 240 SQFT studio ADU. The total estimated installed cost - including permitting, foundation, and utility connections - typically ranges from $90,000 to $135,000 depending on the model and property conditions.
What is LD 2003 and how does it affect ADU construction in Maine?
LD 2003 is a Maine law passed in 2022 that mandates all municipalities allow at least one Accessory Dwelling Unit (ADU) on single-family lots. This effectively removed restrictive zoning barriers, making it significantly easier for Maine homeowners to add an ADU to their property.
Can I rent out an ADU in Maine?
Yes, ADUs are commonly used for rental housing in Maine, subject to local rules and any short-term rental restrictions. Rental income varies by town, property, unit design, and management model, so use current local comps before relying on a projected monthly or seasonal rent.
What does MUBEC compliant mean for an ADU?
MUBEC (Maine Uniform Building and Energy Code) compliance means the ADU meets all of Maine's strict structural, energy efficiency, and safety requirements for residential dwellings. All Place Buildings ADUs are engineered to full MUBEC standards - this is non-negotiable for any legally compliant unit.
How long does it take to install an ADU in Maine?
Our ADU installation timeline is typically 4-8 weeks from permitting approval to move-in ready. Place Buildings handles the entire process including municipal permitting, foundation preparation, utility trenching, and final hook-up.