How many homes in Alum Rock, CA are overcrowded?

Name: Crowding and facilities in Alum Rock, CA, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

18.0% (±5.5 points) of occupied homes in Alum Rock, CA have more than one occupant per room (2020–2024 American Community Survey).

6.2% have more than 1.5.

0.3% lack complete plumbing.

0.6% lack a complete kitchen.

Figures last updated on November 12, 2026.

More than 1 per room: 18.0% (±5.5 points)
Lacking plumbing: 0.3%
Lacking a kitchen: 0.6%

Crowding and facilities in Alum Rock

Share of occupied homes, estimate (90% margin of error)
	Alum Rock	Santa Clara County	California	United States
More than 1 person per room	18.0% (±5.5 points)	7.5% (±0.3 points)	8.2% (±0.1 points)	3.4%
More than 1.5 people per room	6.2% (±3.7 points)	3.0% (±0.2 points)	3.2% (±0.1 points)	1.2%
Lacking complete plumbing	0.3% (±0.4 points)	0.4% (±0.1 points)	0.4% (±0.1 points)	0.4%
Lacking a complete kitchen	0.6% (±0.6 points)	0.9% (±0.1 points)	1.2% (±0.1 points)	0.8%

A room is any whole room other than a bathroom, hall or porch; more than one person per room is the Census Bureau’s usual measure of crowding.

Complete plumbing means hot and cold running water and a bath or shower; a complete kitchen means a sink with a faucet, a stove or range and a refrigerator.

In Alum Rock, the share of crowded homes is higher than in Santa Clara County (7.5%).

It is also higher than in California (8.2%).

It is higher than the national figure (3.4%).

Crowded homes in places near Alum Rock

Nearest places with a published estimate, compared with Alum Rock
Place	Distance	Crowded homes	Compared with this place
Alum Rock	—	18.0% (±5.5 points)	—
East Foothills	1.1 mi	7.9% (±3.7 points)	Lower
San Jose	5.1 mi	8.9% (±0.4 points)	Lower
Milpitas	5.7 mi	9.1% (±1.6 points)	Lower
Burbank (community)	6.8 mi	10.6% (±6.5 points)	Not measurably different
Santa Clara	7.9 mi	7.4% (±1.0 points)	Lower
Campbell	9.4 mi	5.3% (±1.6 points)	Lower
Cambrian Park	9.7 mi	2.0% (±4.0 points)	Lower
Fremont	11 mi	8.6% (±0.8 points)	Lower

Nearby places with a measurably lower figure: East Foothills, CA (7.9%), San Jose, CA (8.9%), Milpitas, CA (9.1%).

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

Alum Rock 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 Alum Rock

How many homes in Alum Rock are overcrowded?

18.0% of occupied homes in Alum Rock, CA have more than one person per room (2020–2024 American Community Survey).

How many homes in Alum Rock lack plumbing or a kitchen?

0.3% lack complete plumbing facilities and 0.6% lack complete kitchen facilities.

Sources

Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — Alum Rock 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 Alum Rock CDP, California (place:01458, 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_0078PE, DP04_0078PM, DP04_0079PE, DP04_0079PM, DP04_0073PE, DP04_0073PM, DP04_0074PE, DP04_0074PM

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.