What kinds of homes are in Chelmsford, MA?

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

Chelmsford, MA has 13,942 (±454) homes (2020–2024 American Community Survey).

That is about 623 homes per square mile of land.

66.7% are detached single-family houses.

4.3% are in buildings of two to four units.

19.0% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 13,942 (±454)
Detached houses: 66.7%
2–4 unit buildings: 4.3%
5+ unit buildings: 19.0%

Homes in Chelmsford by building size

Housing units by units in structure, 2020–2024
Building type	Chelmsford	Middlesex County	Massachusetts	United States
Single-family, detached	66.7% (±2.8 points)	46.5%	51.1%	61.3%
Single-family, attached (townhouse, rowhouse)	8.0% (±1.5 points)	6.9%	5.9%	6.2%
2 units	2.7% (±1.1 points)	12.2%	9.3%	3.4%
3 or 4 units	1.6% (±0.7 points)	8.5%	10.7%	4.3%
5 to 9 units	2.6% (±1.9 points)	4.7%	5.7%	4.5%
10 to 19 units	6.2% (±1.4 points)	5.1%	4.2%	4.3%
20 or more units	10.2% (±2.0 points)	15.7%	12.3%	10.3%
Mobile home	1.9% (±0.6 points)	0.4%	0.8%	5.6%
Boat, RV, van, etc.	0.1% (±0.2 points)	0.1%	0.0%	0.1%

In Chelmsford, the share of homes in buildings of five or more units is lower than in Middlesex County (25.5%).

It is also lower than in Massachusetts (22.2%).

It is not measurably different from the national figure (19.1%).

Homes in buildings of 5 or more units in places near Chelmsford

Nearest places with a published estimate, compared with Chelmsford
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Chelmsford	—	19.0% (±3.1 points)	—
Westford	3.7 mi	10.4% (±2.0 points)	Lower
Lowell	3.8 mi	35.4% (±2.3 points)	Higher
Carlisle	4.2 mi	4.2% (±3.1 points)	Lower
Tyngsborough	5.7 mi	9.8% (±4.0 points)	Lower
Billerica	6.1 mi	16.3% (±2.8 points)	Not measurably different
Dracut	6.7 mi	19.9% (±3.8 points)	Not measurably different
Littleton Common	6.8 mi	6.3% (±7.8 points)	Lower
Tewksbury	7.3 mi	14.5% (±2.7 points)	Lower

Nearby places with a measurably lower figure: Westford, MA (10.4%), Carlisle, MA (4.2%), Tyngsborough, MA (9.8%).

Nearby places with a measurably higher figure: Lowell, MA (35.4%).

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 Middlesex County, place by place

Rank	Place	Homes in buildings of 5 or more units
16	Acton	23.6% (±4.0 points)
17	Burlington	22.5% (±3.5 points)
18	Everett	21.8% (±3.0 points)
19	Hudson	21.6% (±4.2 points)
20	Wakefield	20.3% (±2.8 points)
21	Dracut	19.9% (±3.8 points)
22	Chelmsford	19.0% (±3.1 points)
23	Reading	18.7% (±3.1 points)
24	Concord	18.4% (±3.5 points)
25	North Reading	17.5% (±4.5 points)
26	Ayer	17.4% (±6.0 points)
27 (tie)	Newton	16.9% (±1.6 points)
27 (tie)	Bedford	16.9% (±4.1 points)

Showing 13 of 54 places in Middlesex 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 Chelmsford

How many homes are in Chelmsford?

Chelmsford, MA has an estimated 13,942 (±454) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Chelmsford houses or apartments?

66.7% are detached houses and 8.0% attached houses, while 23.3% are in buildings of two or more units.

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

4.3% of homes in Chelmsford 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 — Chelmsford town, Middlesex County, Massachusetts

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 Chelmsford town, Middlesex County, Massachusetts (county subdivision:13135, in state:25 county:017).

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.