What kinds of homes are in Janesville, WI?

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

Janesville, WI has 29,330 (±557) homes (2020–2024 American Community Survey).

That is about 847 homes per square mile of land.

67.8% are detached single-family houses.

8.0% are in buildings of two to four units.

15.5% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 29,330 (±557)
Detached houses: 67.8%
2–4 unit buildings: 8.0%
5+ unit buildings: 15.5%

Homes in Janesville by building size

Housing units by units in structure, 2020–2024
Building type	Janesville	Rock County	Wisconsin	United States
Single-family, detached	67.8% (±1.9 points)	74.4%	66.2%	61.3%
Single-family, attached (townhouse, rowhouse)	6.6% (±1.1 points)	4.5%	4.3%	6.2%
2 units	5.3% (±1.1 points)	4.4%	5.9%	3.4%
3 or 4 units	2.7% (±0.7 points)	2.4%	3.5%	4.3%
5 to 9 units	7.0% (±1.3 points)	3.8%	4.9%	4.5%
10 to 19 units	2.0% (±0.7 points)	2.4%	3.7%	4.3%
20 or more units	6.5% (±0.9 points)	5.4%	8.4%	10.3%
Mobile home	2.1% (±0.6 points)	2.6%	3.1%	5.6%
Boat, RV, van, etc.	0.0% (±0.1 points)	0.0%	0.0%	0.1%

In Janesville, the share of homes in buildings of five or more units is higher than in Rock County (11.6%).

It is not measurably different from Wisconsin (17.0%).

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

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

Nearest places with a published estimate, compared with Janesville
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Janesville	—	15.5% (±1.7 points)	—
Town of Harmony (Rock County)	4.1 mi	0.0% (±3.6 points)	Lower
Town of Janesville	4.3 mi	0.0% (±2.4 points)	Lower
Town of La Prairie	5.2 mi	0.3% (±8.8 points)	Lower
Town of Rock (Rock County)	5.3 mi	0.0% (±2.9 points)	Lower
Milton	7.2 mi	12.6% (±5.1 points)	Not measurably different
Town of Fulton	8.2 mi	0.0% (±1.7 points)	Lower
Town of Milton (Rock County)	8.9 mi	1.4% (±3.2 points)	Lower
Town of Center (Rock County)	9.0 mi	0.0% (±8.0 points)	Lower

Nearby places with a measurably lower figure: Town of Harmony (Rock County), WI (0.0%), Town of Janesville, WI (0.0%), Town of La Prairie, WI (0.3%).

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 Rock County, place by place

Rank	Place	Homes in buildings of 5 or more units
1	Orfordville	21.3% (±18.1 points)
2	Edgerton	21.0% (±7.7 points)
3	Evansville	16.9% (±7.5 points)
4	Janesville	15.5% (±1.7 points)
5	Beloit	13.9% (±2.1 points)
6	Clinton	13.3% (±5.7 points)
7	Milton	12.6% (±5.1 points)
8	Town of Beloit	3.7% (±1.9 points)
9	Town of Turtle	3.4% (±3.9 points)
10	Footville	2.8% (±7.5 points)

Showing 10 of 28 places in Rock 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 Janesville

How many homes are in Janesville?

Janesville, WI has an estimated 29,330 (±557) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Janesville houses or apartments?

67.8% are detached houses and 6.6% attached houses, while 23.5% are in buildings of two or more units.

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

8.0% of homes in Janesville 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 — Janesville city, Wisconsin

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 Janesville city, Wisconsin (place:37825, in state:55).

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.