What kinds of homes are in Castro Valley, CA?

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

Castro Valley, CA has 22,957 (±700) homes (2020–2024 American Community Survey).

That is about 1,363 homes per square mile of land.

73.3% are detached single-family houses.

5.3% are in buildings of two to four units.

12.1% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 22,957 (±700)
Detached houses: 73.3%
2–4 unit buildings: 5.3%
5+ unit buildings: 12.1%

Homes in Castro Valley by building size

Housing units by units in structure, 2020–2024
Building type	Castro Valley	Alameda County	California	United States
Single-family, detached	73.3% (±2.2 points)	51.0%	57.0%	61.3%
Single-family, attached (townhouse, rowhouse)	7.6% (±1.4 points)	8.8%	7.4%	6.2%
2 units	1.4% (±0.5 points)	3.6%	2.4%	3.4%
3 or 4 units	3.9% (±1.2 points)	6.5%	5.4%	4.3%
5 to 9 units	1.1% (±0.5 points)	5.2%	5.7%	4.5%
10 to 19 units	3.8% (±1.1 points)	4.9%	4.9%	4.3%
20 or more units	7.2% (±1.3 points)	18.7%	13.6%	10.3%
Mobile home	1.5% (±0.6 points)	1.3%	3.5%	5.6%
Boat, RV, van, etc.	0.3% (±0.4 points)	0.1%	0.1%	0.1%

In Castro Valley, the share of homes in buildings of five or more units is lower than in Alameda County (28.8%).

It is also lower than in California (24.2%).

It is lower than the national figure (19.1%).

Homes in buildings of 5 or more units in places near Castro Valley

Nearest places with a published estimate, compared with Castro Valley
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Castro Valley	—	12.1% (±1.8 points)	—
Fairview	2.3 mi	3.6% (±2.3 points)	Lower
Cherryland	3.0 mi	22.1% (±4.6 points)	Higher
Ashland	3.1 mi	41.7% (±5.6 points)	Higher
San Lorenzo	4.6 mi	11.2% (±2.2 points)	Not measurably different
Norris Canyon	4.8 mi	0.0% (±18.2 points)	Not measurably different
San Leandro	5.5 mi	24.2% (±2.0 points)	Higher
Hayward	6.1 mi	27.3% (±1.6 points)	Higher
Union City	7.7 mi	18.0% (±1.9 points)	Higher

Nearby places with a measurably lower figure: Fairview, CA (3.6%).

Nearby places with a measurably higher figure: Cherryland, CA (22.1%), Ashland, CA (41.7%), San Leandro, CA (24.2%).

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

Homes in buildings of 5 or more units across Alameda County, place by place

Rank	Place	Homes in buildings of 5 or more units
10	San Leandro	24.2% (±2.0 points)
11	Cherryland	22.1% (±4.6 points)
12	Pleasanton	20.6% (±2.2 points)
13	Union City	18.0% (±1.9 points)
14	Livermore	14.3% (±2.0 points)
15	Newark	13.6% (±2.0 points)
16	Castro Valley	12.1% (±1.8 points)
17	San Lorenzo	11.2% (±2.2 points)
18	Fairview	3.6% (±2.3 points)
19	Piedmont	1.3% (±1.9 points)

Showing 10 of 19 places in Alameda County, ranked from highest to lowest.

Castro Valley 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 Castro Valley

How many homes are in Castro Valley?

Castro Valley, CA has an estimated 22,957 (±700) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Castro Valley houses or apartments?

73.3% are detached houses and 7.6% attached houses, while 17.4% are in buildings of two or more units.

How many two-family and small multifamily homes are in Castro Valley?

5.3% of homes in Castro Valley are in buildings of two to four units, the small rental buildings that are often owner-occupied.

Sources

Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — Castro Valley 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 Castro Valley CDP, California (place:11964, 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_0001E, DP04_0001M, DP04_0007PE, DP04_0007PM, DP04_0008PE, DP04_0008PM, DP04_0009PE, DP04_0009PM, DP04_0010PE, DP04_0010PM, DP04_0011PE, DP04_0011PM, DP04_0012PE, DP04_0012PM, DP04_0013PE, DP04_0013PM, DP04_0014PE, DP04_0014PM, DP04_0015PE, DP04_0015PM

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.