How old are the homes in Helena Valley Southeast, MT?

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

28.5% (±7.2 points) of the homes in Helena Valley Southeast, MT were built before 1980 (2020–2024 American Community Survey).

1.3% were built before 1940.

13.3% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 28.5% (±7.2 points)
Built before 1940: 1.3%
Built 2010 or later: 13.3%

When the homes in Helena Valley Southeast were built

Housing units by year structure built, 2020–2024
Year built	Helena Valley Southeast	Lewis and Clark County	Montana	United States
2020 or later	6.1% (±3.3 points)	3.2%	2.3%	2.0%
2010 to 2019	7.2% (±3.6 points)	13.1%	11.7%	9.4%
2000 to 2009	14.2% (±4.7 points)	12.9%	14.0%	13.6%
1990 to 1999	22.6% (±6.6 points)	12.2%	12.3%	12.4%
1980 to 1989	21.4% (±6.3 points)	11.1%	10.7%	12.9%
1970 to 1979	26.0% (±6.9 points)	18.4%	16.0%	14.2%
1960 to 1969	0.6% (±0.7 points)	6.4%	7.4%	9.9%
1950 to 1959	0.6% (±0.9 points)	6.1%	8.3%	9.5%
1940 to 1949	0.0% (±0.8 points)	3.4%	4.5%	4.4%
1939 or earlier	1.3% (±1.3 points)	13.1%	12.8%	11.7%

In Helena Valley Southeast, the share of homes built before 1980 is lower than in Lewis and Clark County (47.4%).

It is also lower than in Montana (49.0%).

It is lower than the national figure (49.7%).

In Lewis and Clark County, Helena Valley Southeast ranks 5 of 7 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 150 of 167.

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 (2.5%) and the share built before 1980 (28.5%).

Homes built before 1980 in places near Helena Valley Southeast

Nearest places with a published estimate, compared with Helena Valley Southeast
Place	Distance	Homes built before 1980	Compared with this place
Helena Valley Southeast	—	28.5% (±7.2 points)	—
East Helena	2.8 mi	67.9% (±20.3 points)	Higher
Helena	6.0 mi	58.4% (±4.0 points)	Higher
Helena Valley Northeast	6.1 mi	25.1% (±10.3 points)	Not measurably different
Montana City	7.0 mi	22.7% (±7.2 points)	Not measurably different
Helena Valley West Central	7.9 mi	43.0% (±7.3 points)	Higher
Helena West Side	10 mi	55.3% (±22.3 points)	Higher
Helena Valley Northwest	10 mi	19.3% (±9.9 points)	Not measurably different
Clancy	13 mi	28.0% (±12.1 points)	Not measurably different

Nearby places with a measurably higher figure: East Helena, MT (67.9%), Helena, MT (58.4%), Helena Valley West Central, MT (43.0%).

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

Homes built before 1980 across Lewis and Clark County, place by place

Rank	Place	Homes built before 1980
1	East Helena	67.9% (±20.3 points)
2	Helena	58.4% (±4.0 points)
3	Helena West Side	55.3% (±22.3 points)
4	Helena Valley West Central	43.0% (±7.3 points)
5	Helena Valley Southeast	28.5% (±7.2 points)
6	Helena Valley Northeast	25.1% (±10.3 points)
7	Helena Valley Northwest	19.3% (±9.9 points)

Helena Valley Southeast is a census-designated place: an unincorporated community the Census Bureau draws for statistics, with no municipal government of its own.

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 Helena Valley Southeast

How old are most homes in Helena Valley Southeast?

28.5% of homes in Helena Valley Southeast, MT were built before 1980 (2020–2024 American Community Survey).

Do homes in Helena Valley Southeast 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 2.5% and 28.5% of homes in Helena Valley Southeast were built before then.

Does a contractor need lead certification to work on older homes in Helena Valley Southeast?

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 — Helena Valley Southeast CDP, Montana

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 Helena Valley Southeast CDP, Montana (place:35634, in state:30).

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.