What kinds of homes are in Marietta-Alderwood, WA?

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

Marietta-Alderwood, WA has 1,670 (±237) homes (2020–2024 American Community Survey).

That is about 287 homes per square mile of land.

46.9% are detached single-family houses.

8.0% are in buildings of two to four units.

29.9% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 1,670 (±237)
Detached houses: 46.9%
2–4 unit buildings: 8.0%
5+ unit buildings: 29.9%

Homes in Marietta-Alderwood by building size

Housing units by units in structure, 2020–2024
Building type	Marietta-Alderwood	Whatcom County	Washington	United States
Single-family, detached	46.9% (±8.9 points)	62.8%	61.9%	61.3%
Single-family, attached (townhouse, rowhouse)	6.0% (±5.4 points)	3.5%	4.4%	6.2%
2 units	4.2% (±4.3 points)	2.6%	2.3%	3.4%
3 or 4 units	3.8% (±2.5 points)	4.4%	3.5%	4.3%
5 to 9 units	4.7% (±3.3 points)	4.1%	4.3%	4.5%
10 to 19 units	16.0% (±7.6 points)	5.8%	4.9%	4.3%
20 or more units	9.2% (±5.5 points)	10.2%	13.0%	10.3%
Mobile home	8.0% (±6.1 points)	6.3%	5.5%	5.6%
Boat, RV, van, etc.	1.2% (±1.9 points)	0.2%	0.3%	0.1%

In Marietta-Alderwood, the share of homes in buildings of five or more units is not measurably different from Whatcom County (20.1%).

It is not measurably different from Washington (22.2%).

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

Homes in buildings of 5 or more units in places near Marietta-Alderwood

Nearest places with a published estimate, compared with Marietta-Alderwood
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Marietta-Alderwood	—	29.9% (±9.9 points)	—
Bellingham	4.6 mi	38.7% (±1.9 points)	Not measurably different
Ferndale	4.8 mi	17.1% (±6.4 points)	Lower
Geneva	7.5 mi	1.1% (±5.7 points)	Lower
Sudden Valley	11 mi	2.7% (±2.9 points)	Lower
Lynden	12 mi	12.9% (±3.6 points)	Lower
Everson	13 mi	5.2% (±8.0 points)	Lower
Birch Bay	13 mi	7.8% (±4.1 points)	Lower
Nooksack	14 mi	0.0% (±10.6 points)	Lower

Nearby places with a measurably lower figure: Ferndale, WA (17.1%), Geneva, WA (1.1%), Sudden Valley, WA (2.7%).

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 Whatcom County, place by place

Rank	Place	Homes in buildings of 5 or more units
1	Bellingham	38.7% (±1.9 points)
2	Marietta-Alderwood	29.9% (±9.9 points)
3	Ferndale	17.1% (±6.4 points)
4	Lynden	12.9% (±3.6 points)
5	Blaine	9.1% (±4.1 points)
6	Birch Bay	7.8% (±4.1 points)
7	Sumas	7.2% (±4.3 points)
8	Peaceful Valley	5.7% (±8.1 points)

Showing 8 of 13 places in Whatcom County, ranked from highest to lowest.

Marietta-Alderwood 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 Marietta-Alderwood

How many homes are in Marietta-Alderwood?

Marietta-Alderwood, WA has an estimated 1,670 (±237) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Marietta-Alderwood houses or apartments?

46.9% are detached houses and 6.0% attached houses, while 37.9% are in buildings of two or more units.

How many two-family and small multifamily homes are in Marietta-Alderwood?

8.0% of homes in Marietta-Alderwood 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 — Marietta-Alderwood CDP, Washington

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 Marietta-Alderwood CDP, Washington (place:43491, in state:53).

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.