New England division · Northeast
Maine
Maine authorized an average of 6,564 new housing units a year in 2021–2025, the second-largest total of the 6 New England states. Permits rose 16% between 2024 and 2025, the second-largest increase among the 50 states and DC. Relative to population, the rate was 4.7 units per 1,000 residents a year in 2021–2025, the highest rate of the 6 New England states.
Single-family2–4 units5+ units
Buildings with five or more units accounted for 21% of the units authorized in 2021–2025, the lowest share among the 6 New England states.
Houses or apartments
The closest match in building mix among the 50 other states is Idaho (21% in five-plus buildings). That share has risen sharply since 2004–2006, when it stood at 6.2%. Duplexes to fourplexes are unusually common here: 5.2% of units, against 3.5% nationally. Units in five-plus buildings peaked in 2025 (1,874), single-family houses in 2004 (8,053).
Boom, bust and since
Maine authorized the most units in 2005 (8,969); 2025 reached 78% of that. Its peak year is shared by 19 other states, among them Hawaii, Rhode Island, West Virginia. Annual permits fell from 8,969 during the mid-2000s boom to 2,744 in 2011, a drop of 69%. The nearest bust profile among the states was Pennsylvania's (70%). The 2021–2025 pace of 6,564 units a year is 21% below the 2004–2006 pace. Permits rose 8 years in a row up to 2022.
Metro areas
In 2021–2025, 64% of the units authorized in Maine fell in counties belonging to one of its 3 metro areas; the other 36% came from smaller towns and rural counties. Portland, ME leads with 3,402 units a year.
Average units authorized per year, 2021–2025.
Busiest permit offices
Across Maine, 355 permit offices authorized new housing in 2021–2025. The busiest was Portland, with 1,704 units or 5.2% of the total, followed by Scarborough town with 1,145. Among the three largest, Portland put 89% of its units in five-plus buildings, Scarborough town 67%.
Share of the units authorized in Maine, 2021–2025.
Reported and estimated
Permit offices in Maine reported 69% of the 2021–2025 units directly; the Census Bureau estimated 31% for offices that missed months (US: 8.2%; closest state: Alaska, 28%).
Similar in size
| State | 2004–2025 | 2025 units | Per 1,000 a year | 5+ share |
|---|---|---|---|---|
| Hawaii | 3,708 | 2.7 | 34% | |
| New Hampshire | 5,030 | 3.5 | 28% | |
| Maine | 6,979 | 4.7 | 21% | |
| Montana | 5,258 | 5.1 | 40% | |
| Rhode Island | 1,738 | 1.4 | 23% |
Rates and shares: 2021–2025.
Every yearly figure behind the chart, split by building size: yearly-units.csv. Counting rules.