How old are the homes in Bostonia, CA?

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

50.3% (±6.8 points) of the homes in Bostonia, CA were built before 1980 (2020–2024 American Community Survey).

0.7% were built before 1940.

5.2% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 50.3% (±6.8 points)
Built before 1940: 0.7%
Built 2010 or later: 5.2%

When the homes in Bostonia were built

Housing units by year structure built, 2020–2024
Year built	Bostonia	San Diego County	California	United States
2020 or later	1.8% (±2.0 points)	1.4%	1.3%	2.0%
2010 to 2019	3.4% (±1.7 points)	6.9%	6.5%	9.4%
2000 to 2009	7.7% (±3.1 points)	12.2%	11.2%	13.6%
1990 to 1999	8.1% (±3.5 points)	11.3%	10.1%	12.4%
1980 to 1989	28.7% (±5.0 points)	18.6%	14.9%	12.9%
1970 to 1979	20.4% (±3.8 points)	21.4%	16.8%	14.2%
1960 to 1969	14.9% (±4.2 points)	11.2%	12.5%	9.9%
1950 to 1959	13.2% (±3.6 points)	9.8%	12.4%	9.5%
1940 to 1949	1.1% (±0.9 points)	3.0%	5.4%	4.4%
1939 or earlier	0.7% (±0.8 points)	4.0%	8.9%	11.7%

In Bostonia, the share of homes built before 1980 is not measurably different from San Diego County (49.4%).

It is not measurably different from California (56.0%).

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

In San Diego County, Bostonia ranks 26 of 50 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 632 of 1,076.

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 (29.9%) and the share built before 1980 (50.3%).

Homes built before 1980 in places near Bostonia

Nearest places with a published estimate, compared with Bostonia
Place	Distance	Homes built before 1980	Compared with this place
Bostonia	—	50.3% (±6.8 points)	—
Winter Gardens	1.6 mi	62.8% (±6.4 points)	Higher
El Cajon	1.6 mi	67.5% (±3.4 points)	Higher
Granite Hills	2.4 mi	79.6% (±16.7 points)	Higher
Lakeside	3.4 mi	45.7% (±6.3 points)	Not measurably different
Santee	3.6 mi	53.6% (±3.1 points)	Not measurably different
Casa de Oro-Mount Helix	4.1 mi	79.8% (±7.0 points)	Higher
Rancho San Diego	4.1 mi	25.4% (±4.2 points)	Lower
Crest	4.6 mi	61.5% (±14.3 points)	Not measurably different

Nearby places with a measurably lower figure: Rancho San Diego, CA (25.4%).

Nearby places with a measurably higher figure: Winter Gardens, CA (62.8%), El Cajon, CA (67.5%), Granite Hills, CA (79.6%).

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

Homes built before 1980 across San Diego County, place by place

Rank	Place	Homes built before 1980
20	Rainbow	58.6% (±13.7 points)
21	Poway	55.6% (±3.4 points)
22	Rancho Santa Fe	55.1% (±16.0 points)
23	Lake San Marcos	54.0% (±9.8 points)
24	Santee	53.6% (±3.1 points)
25	San Diego	52.5% (±0.7 points)
26	Bostonia	50.3% (±6.8 points)
27	Encinitas	50.0% (±3.0 points)
28	Fallbrook	48.9% (±5.4 points)
29	Escondido	46.8% (±2.4 points)
30	Lakeside	45.7% (±6.3 points)
31	Harbison Canyon	45.5% (±10.2 points)
32	Ramona	44.4% (±5.5 points)

Showing 13 of 50 places in San Diego County, ranked from highest to lowest.

Bostonia 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 Bostonia

How old are most homes in Bostonia?

50.3% of homes in Bostonia, CA were built before 1980 (2020–2024 American Community Survey).

Do homes in Bostonia 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 29.9% and 50.3% of homes in Bostonia were built before then.

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

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 — Bostonia CDP, California

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 Bostonia CDP, California (place:07624, in state:06).

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.