Maine's Legislature is advancing regulatory reforms to scale modular home manufacturing, positioning the state's factory-built housing sector as a potential model for closing a structural deficit of up to 84,000 units by 2030.
Background
Maine needs between 76,400 and 84,300 additional homes by 2030, according to a 2023 report by HR&A Advisors for the Maine State Housing Authority. That figure combines an existing shortfall of roughly 38,500 units with 37,900 to 45,800 more units required to accommodate population shifts, shrinking household sizes, and pent-up demand.
Demand pressure is compounding the supply gap. Over the past four years, nearly 63,000 new residents moved to Maine in the wake of the COVID pandemic, according to the latest U.S. Census. State economist Amanda Rector has warned that Maine's prime working-age population is expected to drop 5% by 2032, meaning the state must rely on in-migrating workers to sustain its aging workforce - further intensifying housing demand.
Affordability has deteriorated sharply. Between 2021 and 2025, Maine's median home sale price rose nearly 37%, compared with just 19% nationally. In 2024, the state's median income stood at $73,275, while the income needed to afford the median-priced home was $120,938.
Details
A Maine legislative working group report released in December 2025 identified modular and industrialized construction as a key lever for increasing output. Rising construction costs have driven up prices and limited availability of starter and middle-market homes, prompting the Legislature to pass a resolution establishing the Housing Production Innovation Working Group. The group was charged with exploring how the state could better harness industrialized building systems to lower costs and accelerate housing delivery.
Realizing the full potential of modular and closed-wall panel construction requires greater economies of scale - scale currently constrained in Maine by varied local regulations, code interpretations, builder processes, and consumer preferences.
Those constraints are visible on the factory floor. KBS Builders in South Paris - Maine's largest modular plant - employs approximately 120 workers and produces 300 homes per year, running at roughly half capacity; a second nearby plant sits idle, used only for storage. The bottleneck is not labor: KBS President Thatcher Butcher has cited quirks in state law, noting that Maine is the only Northeastern state - and one of very few nationally - that requires a specific license for the installation and sale of modular homes.
According to U.S. Census Bureau data, modular construction accounts for just 3% of new home construction in the United States, compared with 15% to 80% in Europe and Japan. A typical modular accessory dwelling unit in Maine often sells for under $300,000, depending on size, location, and customization - meaningfully below the state's median home sale price of $395,000 recorded in February 2026, according to the Maine Association of Realtors.
On the workforce side, skilled labor remained the construction industry's most persistent challenge in 2025, with retirements outpacing new entrants and training programs expanding only slowly. One recommendation from the January 2025 "Roadmap for the Future of Housing Production in Maine" is to provide long-term, dedicated funding for apprenticeship and pre-apprenticeship programs in the trades. The modular factory model offers a partial structural response: centralized, climate-controlled production environments can accommodate workers with a wider range of physical capabilities and require less site-specific credentialing than traditional field trades.
Supply-chain pressures are adding to the cost burden. Governor Janet Mills has blamed federal tariff policy for increasing construction costs, citing data showing softwood lumber prices were nearly 6% higher at the end of August 2025 than a year earlier. Material prices again tested contractor margins in 2025, with volatility in steel, copper, and electrical components - compounded by lingering tariff effects and transportation bottlenecks - making accurate cost forecasting difficult.
Outlook
Maine's existing Manufactured Housing Act already covers HUD-code and modular homes, and the working group has recommended enacting a broader Industrialized Construction Act to cover all closed-wall building systems and provide a consistent regulatory environment.1Maine Housing Report: Trends for 2025 Uncovered Recommended strategies include:
- Streamlining state and local development approval processes
- Incentivizing municipalities to contribute toward housing production goals
- Strengthening the private sector's capacity to deliver more homes by growing the construction workforce
Industry observers note that if Maine successfully aligns its licensing framework, permitting timelines, and factory capacity, the resulting production model - combining regional manufacturing with trade-workforce development - could offer a replicable framework for other supply-constrained states facing similar demographic and affordability pressures.
Related coverage: Modular Housing Market Set to Reach $200.6 Billion by 2033 | Workforce Analytics Aid Modular Construction Amid Labor Shortages
