How old are the homes in the Town of Lima (Rock County), WI?

Name: Age of homes in the Town of Lima (Rock County), WI, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

67.3% (±15.8 points) of the homes in the Town of Lima (Rock County), WI were built before 1980 (2020–2024 American Community Survey).

36.6% were built before 1940.

3.8% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 67.3% (±15.8 points)
Built before 1940: 36.6%
Built 2010 or later: 3.8%

When the homes in the Town of Lima (Rock County) were built

Housing units by year structure built, 2020–2024
Year built	Town of Lima (Rock County)	Rock County	Wisconsin	United States
2020 or later	0.6% (±0.7 points)	1.2%	1.4%	2.0%
2010 to 2019	3.2% (±3.2 points)	4.3%	7.1%	9.4%
2000 to 2009	4.5% (±2.5 points)	10.8%	12.5%	13.6%
1990 to 1999	12.5% (±6.3 points)	10.8%	12.5%	12.4%
1980 to 1989	11.9% (±5.8 points)	8.0%	9.5%	12.9%
1970 to 1979	11.9% (±4.8 points)	14.4%	14.2%	14.2%
1960 to 1969	9.1% (±4.6 points)	13.4%	9.4%	9.9%
1950 to 1959	5.2% (±3.5 points)	10.7%	10.3%	9.5%
1940 to 1949	4.5% (±4.8 points)	7.2%	5.3%	4.4%
1939 or earlier	36.6% (±13.0 points)	19.2%	17.8%	11.7%

In the Town of Lima (Rock County), the share of homes built before 1980 is not measurably different from Rock County (64.9%).

It is not measurably different from Wisconsin (57.0%).

It is higher than the national figure (49.7%).

In Rock County, the Town of Lima (Rock County) ranks 13 of 28 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 343 of 1,848.

Rankings use the estimates alone; where margins of error overlap, neighboring ranks may not truly differ.

Why the age of a home matters: lead-based paint

Federal law treats housing built before 1978 as likely to contain lead-based paint.

Before a lease or sale of most pre-1978 housing, the landlord or seller must disclose any known lead-based paint and hazards and give the tenant or buyer the EPA pamphlet (42 U.S.C. § 4852d; 40 CFR part 745, subpart F; 24 CFR part 35, subpart A).

A contractor paid to renovate, repair or paint a pre-1978 home must be a certified firm, use a certified renovator and follow lead-safe work practices under the Renovation, Repair and Painting Rule (40 CFR part 745, subpart E) whenever the job disturbs more than 6 square feet of painted surface in a room or more than 20 square feet outside; window replacement and demolition always count (40 CFR 745.83).

Certification comes from EPA, or from the state where EPA has authorized the state to run the program.

The Census Bureau groups construction by decade, so the share built before 1978 lies between the share built before 1970 (55.4%) and the share built before 1980 (67.3%).

Homes built before 1980 in places near the Town of Lima (Rock County)

Nearest places with a published estimate, compared with the Town of Lima (Rock County)
Place	Distance	Homes built before 1980	Compared with this place
Town of Lima (Rock County)	—	67.3% (±15.8 points)	—
Milton	5.3 mi	56.9% (±10.4 points)	Not measurably different
Town of Johnstown (Rock County)	5.6 mi	79.1% (±12.7 points)	Not measurably different
Town of Whitewater	5.7 mi	59.6% (±10.8 points)	Not measurably different
Whitewater	6.0 mi	49.3% (±6.5 points)	Lower
Town of Milton (Rock County)	6.3 mi	52.7% (±15.7 points)	Not measurably different
Town of Koshkonong	6.6 mi	52.9% (±10.2 points)	Not measurably different
Lake Koshkonong	6.6 mi	64.0% (±13.7 points)	Not measurably different
Town of Harmony (Rock County)	7.8 mi	46.0% (±11.1 points)	Lower

Nearby places with a measurably lower figure: Whitewater, WI (49.3%), Town of Harmony (Rock County), WI (46.0%).

Distance is measured in a straight line between the Census Bureau’s internal points for each place.

Homes built before 1980 across Rock County, place by place

Rank	Place	Homes built before 1980
7	Beloit	77.8% (±5.1 points)
8	Orfordville	71.3% (±19.0 points)
9	Town of Newark	70.8% (±11.3 points)
10	Town of Clinton (Rock County)	70.5% (±20.6 points)
11	Town of Plymouth (Rock County)	69.5% (±11.8 points)
12	Town of Beloit	68.4% (±8.9 points)
13	Town of Lima (Rock County)	67.3% (±15.8 points)
14	Town of Rock (Rock County)	66.7% (±19.1 points)
15	Town of Bradford	66.6% (±15.5 points)
16 (tie)	Clinton	63.3% (±11.5 points)
16 (tie)	Edgerton	63.3% (±13.6 points)
18	Janesville	62.7% (±3.3 points)
19	Town of Magnolia	61.5% (±18.4 points)

Showing 13 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.

What you can do on Seayora in Town of Lima (Rock County)

One account for renting, owning, managing and fixing homes, with these figures beside you.

Do repairs, renovations or maintenance?

Get found by owners and renters near Town of Lima (Rock County), and send estimates and invoices from your phone.

Join as a pro · Find a pro

Own or manage a rental?

List it, sign the lease and collect rent online, with the figures for Town of Lima (Rock County) beside you.

Create a landlord account · See what landlords get

Looking for a place to rent?

Browse homes for rent near Town of Lima (Rock County), save the ones you like and apply online.

Browse rentals · Create a renter account

Questions about Town of Lima (Rock County)

How old are most homes in the Town of Lima (Rock County)?

67.3% of homes in the Town of Lima (Rock County), WI were built before 1980 (2020–2024 American Community Survey).

Do homes in the Town of Lima (Rock County) need a lead paint disclosure?

A home built before 1978 does, before it is rented or sold, unless an exemption applies (42 U.S.C. § 4852d); between 55.4% and 67.3% of homes in the Town of Lima (Rock County) were built before then.

Does a contractor need lead certification to work on older homes in the Town of Lima (Rock County)?

Yes, when the job disturbs more than 6 square feet of paint in a room or 20 square feet outside, or replaces a window: the firm must be certified and a certified renovator must direct the work under the Renovation, Repair and Painting Rule (40 CFR part 745, subpart E).

Sources

Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — Lima town, Rock County, 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 Lima town, Rock County, Wisconsin (county subdivision:44125, in state:55 county:105).

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_0017PE, DP04_0017PM, DP04_0018PE, DP04_0018PM, DP04_0019PE, DP04_0019PM, DP04_0020PE, DP04_0020PM, DP04_0021PE, DP04_0021PM, DP04_0022PE, DP04_0022PM, DP04_0023PE, DP04_0023PM, DP04_0024PE, DP04_0024PM, DP04_0025PE, DP04_0025PM, DP04_0026PE, DP04_0026PM

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.