What kinds of homes are in Waltham, MA?

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

Waltham, MA has 26,728 (±625) homes (2020–2024 American Community Survey).

That is about 2,097 homes per square mile of land.

37.0% are detached single-family houses.

22.9% are in buildings of two to four units.

31.1% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 26,728 (±625)
Detached houses: 37.0%
2–4 unit buildings: 22.9%
5+ unit buildings: 31.1%

Homes in Waltham by building size

Housing units by units in structure, 2020–2024
Building type	Waltham	Middlesex County	Massachusetts	United States
Single-family, detached	37.0% (±2.5 points)	46.5%	51.1%	61.3%
Single-family, attached (townhouse, rowhouse)	8.7% (±1.7 points)	6.9%	5.9%	6.2%
2 units	10.9% (±1.7 points)	12.2%	9.3%	3.4%
3 or 4 units	12.0% (±1.7 points)	8.5%	10.7%	4.3%
5 to 9 units	9.8% (±2.2 points)	4.7%	5.7%	4.5%
10 to 19 units	8.1% (±1.3 points)	5.1%	4.2%	4.3%
20 or more units	13.2% (±1.5 points)	15.7%	12.3%	10.3%
Mobile home	0.2% (±0.2 points)	0.4%	0.8%	5.6%
Boat, RV, van, etc.	0.0% (±0.1 points)	0.1%	0.0%	0.1%

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

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

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

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

Nearest places with a published estimate, compared with Waltham
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Waltham	—	31.1% (±3.0 points)	—
Belmont (community)	3.2 mi	10.2% (±2.0 points)	Lower
Belmont	3.2 mi	10.2% (±2.0 points)	Lower
Watertown	3.5 mi	29.9% (±3.1 points)	Not measurably different
Weston	3.7 mi	7.3% (±3.1 points)	Lower
Lexington (community)	3.9 mi	12.8% (±1.9 points)	Lower
Lexington	3.9 mi	12.8% (±1.9 points)	Lower
Newton	4.3 mi	16.9% (±1.6 points)	Lower
Lincoln	4.3 mi	10.6% (±3.8 points)	Lower

Nearby places with a measurably lower figure: Belmont (community), MA (10.2%), Belmont, MA (10.2%), Weston, MA (7.3%).

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
1	Cambridge	54.6% (±1.8 points)
2	Lowell	35.4% (±2.3 points)
3	Malden	34.7% (±2.7 points)
4	Boxborough	34.3% (±9.7 points)
5	Framingham	31.7% (±2.5 points)
6	Waltham	31.1% (±3.0 points)
7 (tie)	Somerville	29.9% (±2.0 points)
7 (tie)	Watertown	29.9% (±3.1 points)
7 (tie)	Stoneham	29.9% (±3.8 points)
10	Marlborough	28.7% (±3.4 points)
11	Natick	28.2% (±3.4 points)
12	Melrose	27.5% (±3.5 points)

Showing 12 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 Waltham

How many homes are in Waltham?

Waltham, MA has an estimated 26,728 (±625) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Waltham houses or apartments?

37.0% are detached houses and 8.7% attached houses, while 54.0% are in buildings of two or more units.

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

22.9% of homes in Waltham 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 — Waltham city, 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 Waltham city, Massachusetts (place:72600, in state:25).

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.