How old are the homes in Summit, AZ?

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

30.9% (±12.2 points) of the homes in Summit, AZ were built before 1980 (2020–2024 American Community Survey).

0.0% were built before 1940.

1.2% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 30.9% (±12.2 points)
Built before 1940: 0.0%
Built 2010 or later: 1.2%

When the homes in Summit were built

Housing units by year structure built, 2020–2024
Year built	Summit	Pima County	Arizona	United States
2020 or later	1.2% (±1.8 points)	1.9%	2.8%	2.0%
2010 to 2019	0.0% (±2.9 points)	8.1%	11.6%	9.4%
2000 to 2009	20.5% (±9.2 points)	18.1%	22.4%	13.6%
1990 to 1999	30.1% (±10.1 points)	16.0%	17.4%	12.4%
1980 to 1989	17.3% (±6.4 points)	16.5%	16.5%	12.9%
1970 to 1979	23.7% (±10.0 points)	18.7%	15.2%	14.2%
1960 to 1969	6.5% (±5.5 points)	8.0%	6.3%	9.9%
1950 to 1959	0.7% (±1.3 points)	7.8%	4.9%	9.5%
1940 to 1949	0.0% (±2.9 points)	2.9%	1.5%	4.4%
1939 or earlier	0.0% (±2.9 points)	2.0%	1.4%	11.7%

In Summit, the share of homes built before 1980 is not measurably different from Pima County (39.4%).

It is not measurably different from Arizona (29.3%).

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

In Pima County, Summit ranks 12 of 24 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 96 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 (7.2%) and the share built before 1980 (30.9%).

Homes built before 1980 in places near Summit

Nearest places with a published estimate, compared with Summit
Place	Distance	Homes built before 1980	Compared with this place
Summit	—	30.9% (±12.2 points)	—
Tucson	7.8 mi	52.4% (±1.2 points)	Higher
Drexel Heights	8.2 mi	33.8% (±3.9 points)	Not measurably different
Sahuarita	9.0 mi	4.2% (±1.6 points)	Lower
South Tucson	9.3 mi	66.8% (±12.6 points)	Higher
Valencia West	11 mi	10.5% (±3.8 points)	Lower
Corona de Tucson	13 mi	6.0% (±4.3 points)	Lower
Tucson Estates	13 mi	32.1% (±5.5 points)	Not measurably different
Vail	15 mi	1.6% (±1.9 points)	Lower

Nearby places with a measurably lower figure: Sahuarita, AZ (4.2%), Valencia West, AZ (10.5%), Corona de Tucson, AZ (6.0%).

Nearby places with a measurably higher figure: Tucson, AZ (52.4%), South Tucson, AZ (66.8%).

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
6	Green Valley	40.8% (±3.3 points)
7	Sells	39.0% (±15.0 points)
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)

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

Summit 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 Summit

How old are most homes in Summit?

30.9% of homes in Summit, AZ were built before 1980 (2020–2024 American Community Survey).

Do homes in Summit 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 7.2% and 30.9% of homes in Summit were built before then.

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

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 — Summit 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 Summit CDP, Arizona (place:70240, 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.