What kinds of homes are in San Marino, CA?

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

San Marino, CA has 4,439 (±437) homes (2020–2024 American Community Survey).

That is about 1,179 homes per square mile of land.

98.6% are detached single-family houses.

0.9% are in buildings of two to four units.

0.0% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 4,439 (±437)
Detached houses: 98.6%
2–4 unit buildings: 0.9%
5+ unit buildings: 0.0%

Homes in San Marino by building size

Housing units by units in structure, 2020–2024
Building type	San Marino	Los Angeles County	California	United States
Single-family, detached	98.6% (±1.0 points)	47.3%	57.0%	61.3%
Single-family, attached (townhouse, rowhouse)	0.5% (±0.5 points)	6.6%	7.4%	6.2%
2 units	0.0% (±1.0 points)	2.6%	2.4%	3.4%
3 or 4 units	0.9% (±0.9 points)	5.9%	5.4%	4.3%
5 to 9 units	0.0% (±1.0 points)	7.8%	5.7%	4.5%
10 to 19 units	0.0% (±1.0 points)	7.6%	4.9%	4.3%
20 or more units	0.0% (±1.0 points)	20.5%	13.6%	10.3%
Mobile home	0.0% (±1.0 points)	1.6%	3.5%	5.6%
Boat, RV, van, etc.	0.0% (±1.0 points)	0.1%	0.1%	0.1%

In San Marino, the share of homes in buildings of five or more units is lower than in Los Angeles County (35.9%).

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 San Marino

Nearest places with a published estimate, compared with San Marino
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
San Marino	—	0.0% (±1.7 points)	—
San Pasqual	1.3 mi	28.4% (±7.2 points)	Higher
East San Gabriel	1.9 mi	23.9% (±3.5 points)	Higher
San Gabriel	2.1 mi	25.6% (±2.7 points)	Higher
East Pasadena	2.2 mi	8.7% (±5.7 points)	Higher
South Pasadena	2.7 mi	33.6% (±3.8 points)	Higher
Pasadena	3.0 mi	44.2% (±1.7 points)	Higher
Alhambra	3.0 mi	33.9% (±2.1 points)	Higher
Temple City	3.4 mi	8.7% (±1.9 points)	Higher

Nearby places with a measurably higher figure: San Pasqual, CA (28.4%), East San Gabriel, CA (23.9%), San Gabriel, CA (25.6%).

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 Los Angeles County, place by place

Rank	Place	Homes in buildings of 5 or more units
125	South Monrovia Island	1.4% (±4.2 points)
126	La Habra Heights	1.2% (±2.3 points)
127	South San Jose Hills	0.8% (±1.2 points)
128	Rolling Hills	0.5% (±8.9 points)
129	Acton	0.4% (±2.2 points)
130 (tie)	Hidden Hills	0.0% (±9.7 points)
130 (tie)	San Marino	0.0% (±1.7 points)
130 (tie)	Agua Dulce	0.0% (±6.2 points)
130 (tie)	Desert View Highlands	0.0% (±8.3 points)
130 (tie)	Elizabeth Lake	0.0% (±9.4 points)
130 (tie)	Hasley Canyon	0.0% (±18.2 points)
130 (tie)	Lake Los Angeles	0.0% (±1.9 points)
130 (tie)	Leona Valley	0.0% (±10.0 points)

Showing 13 of 140 places in Los Angeles County, ranked from highest to lowest.

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 San Marino

How many homes are in San Marino?

San Marino, CA has an estimated 4,439 (±437) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in San Marino houses or apartments?

98.6% are detached houses and 0.5% attached houses, while 0.9% are in buildings of two or more units.

How many two-family and small multifamily homes are in San Marino?

0.9% of homes in San Marino 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 — San Marino city, 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 San Marino city, California (place:68224, 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.