Sell Your Commercial Property In Cumberland County, ME

Who rents in Cumberland County

Renters head 39,903 of the 132,168 occupied households in Cumberland County, a 30.2% share in the 2020-2024 ACS. Owners outnumber them, holding 92,265 households across the county.

Portland holds the largest renter pool, with 17,520 renter households, 43.9% of the Cumberland County total, and 53.1% of its own households are renter-occupied. Portland also holds 52.0% of the county's units in 5+ unit buildings.

South Portland counts 5,089 renter households at a 41.9% renter share. Westbrook counts 3,546 renter households at a 38.8% share, the smallest renter base among the three Cumberland County cities in this comparison.

Together, Portland, South Portland and Westbrook hold 26,155 renter households, about two-thirds of the Cumberland County total. Smaller towns such as Falmouth, Scarborough and Cape Elizabeth add renter households too, though this profile focuses the comparison table on the three cities with their own market pages.

Rents, growth and affordability

Cumberland County's median gross rent climbed 40.5%, from $1,131 to $1,589, between the 2015-2019 and 2020-2024 ACS surveys. Household income rose faster still, up 30.9% to $95,677.

Population grew 5.7% to 308,827 residents, adding 16,520 people. Renter households rose only 7.7%, adding 2,837 households, a slower pace than the rent increase.

Supply responded. Units in 5+ unit buildings in Cumberland County grew 23.7%, an increase of 4,392 units. That new stock still leaves rental vacancy at 2.9% in the 2020-2024 ACS, a tight market for buyers to underwrite.

Rent burden is heavy. In the 2020-2024 ACS, 49.9% of Cumberland County renters paid 30% or more of income on gross rent. HUD's FY2027 two-bedroom Fair Market Rent across the county's 28 towns runs $1,941 to $2,353, at least $352 above the county's median gross rent.

City-by-city comparison

Portland carries the most apartment stock among Cumberland County's cities, with 32.7% of its housing units in 5+ unit buildings. South Portland follows at 26.0% and Westbrook at 21.1%.

South Portland posts the highest rent of the three at $1,812, well above the Cumberland County median. Westbrook runs the lowest rent, $1,392, and the smallest apartment share.

Vacancy sits tighter in South Portland and Westbrook than in Portland. A Portland building near the city's 3.6% vacancy rate can draw a different buyer than a Westbrook property in a 2.5% market.

Property taxes and assessment in Cumberland County

Cumberland County municipalities assess commercial property at just value under Maine's property tax code, 36 M.R.S. Section 701-A, which recognizes only legally permissible present land-use alternatives.

Each town sets its own mill rate and runs its own assessment. Portland, South Portland and Westbrook each value and bill separately, so your total tax depends on the specific municipality where the parcel sits. Check with the local assessor's office for the current rate before you price a sale.

Commercial buyers in Cumberland County also watch the assessment cycle itself. A sale that sets a new market value can feed into the next year's assessed value under the just-value standard, so sellers should expect buyers to model the tax line forward rather than lock it to the current bill.

What this means if you sell in Cumberland County

When you sell commercial property in Cumberland County, ME, you sell into a renter base that holds 30.2% of households and a rental vacancy rate of just 2.9%. That tight vacancy is the headline for buyers weighing rent growth against lease-up risk.

Taxes come next. Maine's real estate transfer tax runs $2.20 per $500 of value, split evenly between grantor and grantee, under 36 M.R.S. Section 4641-A, with an added $3.80 per $500 on value over $1,000,000. Buyers also underwrite the municipality's own mill rate, not your current bill, since each Cumberland County town reassesses independently.

Rent growth still favors sellers here. A 40.5% five-year gain in median gross rent, against a 2.9% vacancy rate, gives Cumberland County owners a stronger negotiating position than many slower-growing counties nearby.

As a multifamily buyer in Cumberland County, we review 5+ unit buildings from Portland to Westbrook as they stand today. Send a current rent roll, a T-12 and the latest tax bill, and we will price the building on those numbers.