What kinds of homes are in Lake San Marcos, CA?

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

Lake San Marcos, CA has 2,117 (±251) homes (2020–2024 American Community Survey).

That is about 1,240 homes per square mile of land.

59.7% are detached single-family houses.

5.5% are in buildings of two to four units.

14.1% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 2,117 (±251)
Detached houses: 59.7%
2–4 unit buildings: 5.5%
5+ unit buildings: 14.1%

Homes in Lake San Marcos by building size

Housing units by units in structure, 2020–2024
Building type	Lake San Marcos	San Diego County	California	United States
Single-family, detached	59.7% (±7.2 points)	50.0%	57.0%	61.3%
Single-family, attached (townhouse, rowhouse)	20.7% (±5.9 points)	10.0%	7.4%	6.2%
2 units	4.0% (±3.1 points)	1.9%	2.4%	3.4%
3 or 4 units	1.5% (±1.4 points)	5.0%	5.4%	4.3%
5 to 9 units	4.1% (±2.8 points)	7.2%	5.7%	4.5%
10 to 19 units	2.8% (±2.5 points)	6.1%	4.9%	4.3%
20 or more units	7.2% (±2.8 points)	16.2%	13.6%	10.3%
Mobile home	0.0% (±2.0 points)	3.3%	3.5%	5.6%
Boat, RV, van, etc.	0.0% (±2.0 points)	0.1%	0.1%	0.1%

In Lake San Marcos, the share of homes in buildings of five or more units is lower than in San Diego County (29.5%).

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 Lake San Marcos

Nearest places with a published estimate, compared with Lake San Marcos
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Lake San Marcos	—	14.1% (±4.7 points)	—
San Marcos	2.3 mi	23.0% (±2.0 points)	Higher
Harmony Grove	4.4 mi	7.5% (±12.8 points)	Not measurably different
Carlsbad	4.4 mi	22.9% (±2.1 points)	Higher
Vista	5.0 mi	30.6% (±2.6 points)	Higher
Encinitas	5.9 mi	13.9% (±2.0 points)	Not measurably different
Rancho Santa Fe	6.7 mi	0.0% (±6.1 points)	Lower
Escondido	7.8 mi	28.0% (±2.2 points)	Higher
Hidden Meadows	8.7 mi	9.2% (±6.9 points)	Not measurably different

Nearby places with a measurably lower figure: Rancho Santa Fe, CA (0.0%).

Nearby places with a measurably higher figure: San Marcos, CA (23.0%), Carlsbad, CA (22.9%), Vista, CA (30.6%).

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 San Diego County, place by place

Rank	Place	Homes in buildings of 5 or more units
20	Rancho San Diego	20.4% (±3.8 points)
21	La Presa	17.1% (±2.6 points)
22	Spring Valley	16.7% (±3.5 points)
23	Santee	16.5% (±2.1 points)
24	Ramona	16.2% (±4.4 points)
25	Alpine	14.4% (±5.1 points)
26	Lake San Marcos	14.1% (±4.7 points)
27	Encinitas	13.9% (±2.0 points)
28	Bonita	13.8% (±6.4 points)
29	Poway	13.4% (±2.1 points)
30	Casa de Oro-Mount Helix	12.3% (±3.2 points)
31	Bonsall	10.3% (±5.9 points)
32	Hidden Meadows	9.2% (±6.9 points)

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

Lake San Marcos 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 Lake San Marcos

How many homes are in Lake San Marcos?

Lake San Marcos, CA has an estimated 2,117 (±251) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Lake San Marcos houses or apartments?

59.7% are detached houses and 20.7% attached houses, while 19.6% are in buildings of two or more units.

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

5.5% of homes in Lake San Marcos 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 — Lake San Marcos 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 Lake San Marcos CDP, California (place:39724, 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.