How old are the homes in Southwest Harbor, ME?

Name: Age of homes in Southwest Harbor, ME, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

44.4% (±9.1 points) of the homes in Southwest Harbor, ME were built before 1980 (2020–2024 American Community Survey).

19.0% were built before 1940.

5.1% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 44.4% (±9.1 points)
Built before 1940: 19.0%
Built 2010 or later: 5.1%

When the homes in Southwest Harbor were built

Housing units by year structure built, 2020–2024
Year built	Southwest Harbor	Hancock County	Maine	United States
2020 or later	2.0% (±2.0 points)	1.2%	1.4%	2.0%
2010 to 2019	3.1% (±2.4 points)	8.7%	7.1%	9.4%
2000 to 2009	8.9% (±4.6 points)	15.6%	12.4%	13.6%
1990 to 1999	14.9% (±4.6 points)	12.5%	10.7%	12.4%
1980 to 1989	26.6% (±7.0 points)	14.5%	14.0%	12.9%
1970 to 1979	10.6% (±4.1 points)	11.5%	13.2%	14.2%
1960 to 1969	6.3% (±3.7 points)	5.5%	7.2%	9.9%
1950 to 1959	5.3% (±3.0 points)	5.1%	6.8%	9.5%
1940 to 1949	3.2% (±2.4 points)	3.3%	4.4%	4.4%
1939 or earlier	19.0% (±6.2 points)	22.1%	22.9%	11.7%

In Southwest Harbor, the share of homes built before 1980 is not measurably different from Hancock County (47.5%).

It is also lower than in Maine (54.5%).

It is not measurably different from the national figure (49.7%).

In Hancock County, Southwest Harbor ranks 22 of 37 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 318 of 482.

Rankings use the estimates alone; where margins of error overlap, neighboring ranks may not truly differ.

Why the age of a home matters: lead-based paint

Federal law treats housing built before 1978 as likely to contain lead-based paint.

Before a lease or sale of most pre-1978 housing, the landlord or seller must disclose any known lead-based paint and hazards and give the tenant or buyer the EPA pamphlet (42 U.S.C. § 4852d; 40 CFR part 745, subpart F; 24 CFR part 35, subpart A).

A contractor paid to renovate, repair or paint a pre-1978 home must be a certified firm, use a certified renovator and follow lead-safe work practices under the Renovation, Repair and Painting Rule (40 CFR part 745, subpart E) whenever the job disturbs more than 6 square feet of painted surface in a room or more than 20 square feet outside; window replacement and demolition always count (40 CFR 745.83).

Certification comes from EPA, or from the state where EPA has authorized the state to run the program.

The Census Bureau groups construction by decade, so the share built before 1978 lies between the share built before 1970 (33.8%) and the share built before 1980 (44.4%).

Homes built before 1980 in places near Southwest Harbor

Nearest places with a published estimate, compared with Southwest Harbor
Place	Distance	Homes built before 1980	Compared with this place
Southwest Harbor	—	44.4% (±9.1 points)	—
Cranberry Isles	4.3 mi	71.4% (±11.7 points)	Higher
Mount Desert	5.3 mi	58.6% (±9.7 points)	Higher
Tremont	7.2 mi	38.6% (±7.4 points)	Not measurably different
Frenchboro	8.1 mi	57.7% (±40.5 points)	Not measurably different
Bar Harbor (community)	9.9 mi	57.4% (±15.1 points)	Not measurably different
Bar Harbor	10.0 mi	40.6% (±9.8 points)	Not measurably different
Winter Harbor	11 mi	65.3% (±15.3 points)	Higher
Swans Island	11 mi	55.6% (±11.6 points)	Not measurably different

Nearby places with a measurably higher figure: Cranberry Isles, ME (71.4%), Mount Desert, ME (58.6%), Winter Harbor, ME (65.3%).

Distance is measured in a straight line between the Census Bureau’s internal points for each place.

Homes built before 1980 across Hancock County, place by place

Rank	Place	Homes built before 1980
16	Sullivan	48.4% (±10.2 points)
17 (tie)	Amherst	47.5% (±12.6 points)
17 (tie)	Brooksville	47.5% (±9.5 points)
19	Eastbrook	47.0% (±10.2 points)
20	Dedham	46.5% (±8.0 points)
21	Sedgwick	45.3% (±10.6 points)
22	Southwest Harbor	44.4% (±9.1 points)
23	Lamoine	44.1% (±9.5 points)
24	Great Pond	42.9% (±36.3 points)
25	Osborn	41.5% (±22.0 points)
26	Surry	41.4% (±7.7 points)
27	Aurora	41.2% (±29.8 points)
28	Franklin	40.7% (±9.0 points)

Showing 13 of 37 places in Hancock County, ranked from highest to lowest.

Survey years: 2020–2024 (American Community Survey 5-year estimates).

Margins of error are at the 90% confidence level.

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Questions about Southwest Harbor

How old are most homes in Southwest Harbor?

44.4% of homes in Southwest Harbor, ME were built before 1980 (2020–2024 American Community Survey).

Do homes in Southwest Harbor need a lead paint disclosure?

A home built before 1978 does, before it is rented or sold, unless an exemption applies (42 U.S.C. § 4852d); between 33.8% and 44.4% of homes in Southwest Harbor were built before then.

Does a contractor need lead certification to work on older homes in Southwest Harbor?

Yes, when the job disturbs more than 6 square feet of paint in a room or 20 square feet outside, or replaces a window: the firm must be certified and a certified renovator must direct the work under the Renovation, Repair and Painting Rule (40 CFR part 745, subpart E).

Sources

Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — Southwest Harbor town, Hancock County, Maine

To check these figures in the Census Bureau’s own API, request the variables below from the 2024 ACS 5-year data profile (acs/acs5/profile) for Southwest Harbor town, Hancock County, Maine (county subdivision:72865, in state:23 county:009).

Each estimate (E or PE) has a margin of error beside it (M or PM).

The API needs a free key.

Request a Census API key.

DP04_0017PE, DP04_0017PM, DP04_0018PE, DP04_0018PM, DP04_0019PE, DP04_0019PM, DP04_0020PE, DP04_0020PM, DP04_0021PE, DP04_0021PM, DP04_0022PE, DP04_0022PM, DP04_0023PE, DP04_0023PM, DP04_0024PE, DP04_0024PM, DP04_0025PE, DP04_0025PM, DP04_0026PE, DP04_0026PM

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Figures are published by the US Census Bureau, HUD, the Bureau of Labor Statistics and the FBI; Seayora reproduces them and does not adjust them, except where a sentence says it compares dollar figures after inflation. They describe the whole place, not any one building or street, and are not an appraisal, a rent determination, a tax bill, a safety rating or legal advice.