How old are the homes in Tucson Mountains, AZ?

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

23.7% (±4.5 points) of the homes in Tucson Mountains, AZ were built before 1980 (2020–2024 American Community Survey).

0.9% were built before 1940.

3.6% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 23.7% (±4.5 points)
Built before 1940: 0.9%
Built 2010 or later: 3.6%

When the homes in Tucson Mountains were built

Housing units by year structure built, 2020–2024
Year built	Tucson Mountains	Pima County	Arizona	United States
2020 or later	0.8% (±0.7 points)	1.9%	2.8%	2.0%
2010 to 2019	2.8% (±1.6 points)	8.1%	11.6%	9.4%
2000 to 2009	23.4% (±3.9 points)	18.1%	22.4%	13.6%
1990 to 1999	22.5% (±4.5 points)	16.0%	17.4%	12.4%
1980 to 1989	26.7% (±6.0 points)	16.5%	16.5%	12.9%
1970 to 1979	16.2% (±3.9 points)	18.7%	15.2%	14.2%
1960 to 1969	2.5% (±1.1 points)	8.0%	6.3%	9.9%
1950 to 1959	3.8% (±1.5 points)	7.8%	4.9%	9.5%
1940 to 1949	0.3% (±0.4 points)	2.9%	1.5%	4.4%
1939 or earlier	0.9% (±1.0 points)	2.0%	1.4%	11.7%

In Tucson Mountains, the share of homes built before 1980 is lower than in Pima County (39.4%).

It is also lower than in Arizona (29.3%).

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

In Pima County, Tucson Mountains ranks 14 of 24 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 131 of 213.

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 (7.5%) and the share built before 1980 (23.7%).

Homes built before 1980 in places near Tucson Mountains

Nearest places with a published estimate, compared with Tucson Mountains
Place	Distance	Homes built before 1980	Compared with this place
Tucson Mountains	—	23.7% (±4.5 points)	—
Flowing Wells	4.0 mi	51.2% (±7.6 points)	Higher
Casas Adobes	5.6 mi	35.3% (±2.0 points)	Higher
Tucson Estates	7.7 mi	32.1% (±5.5 points)	Higher
South Tucson	8.7 mi	66.8% (±12.6 points)	Higher
Drexel Heights	9.6 mi	33.8% (±3.9 points)	Higher
Valencia West	10 mi	10.5% (±3.8 points)	Lower
Picture Rocks	11 mi	16.8% (±6.7 points)	Not measurably different
Oro Valley	11 mi	10.8% (±1.7 points)	Lower

Nearby places with a measurably lower figure: Valencia West, AZ (10.5%), Oro Valley, AZ (10.8%).

Nearby places with a measurably higher figure: Flowing Wells, AZ (51.2%), Casas Adobes, AZ (35.3%), Tucson Estates, AZ (32.1%).

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

Homes built before 1980 across Pima County, place by place

Rank	Place	Homes built before 1980
8	Casas Adobes	35.3% (±2.0 points)
9	Catalina Foothills	35.1% (±2.3 points)
10	Drexel Heights	33.8% (±3.9 points)
11	Tucson Estates	32.1% (±5.5 points)
12	Summit	30.9% (±12.2 points)
13	Three Points	29.4% (±10.8 points)
14	Tucson Mountains	23.7% (±4.5 points)
15	Avra Valley	19.0% (±8.3 points)
16	Catalina	17.8% (±4.7 points)
17	Picture Rocks	16.8% (±6.7 points)
18	Oro Valley	10.8% (±1.7 points)
19	Valencia West	10.5% (±3.8 points)
20	Rincon Valley	6.1% (±4.5 points)

Showing 13 of 24 places in Pima County, ranked from highest to lowest.

Tucson Mountains 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 Tucson Mountains

How old are most homes in Tucson Mountains?

23.7% of homes in Tucson Mountains, AZ were built before 1980 (2020–2024 American Community Survey).

Do homes in Tucson Mountains 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 7.5% and 23.7% of homes in Tucson Mountains were built before then.

Does a contractor need lead certification to work on older homes in Tucson Mountains?

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 — Tucson Mountains CDP, Arizona

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 Tucson Mountains CDP, Arizona (place:77179, in state:04).

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.