How old are the homes in Delavan, WI?

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

64.7% (±9.4 points) of the homes in Delavan, WI were built before 1980 (2020–2024 American Community Survey).

24.3% were built before 1940.

4.7% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 64.7% (±9.4 points)
Built before 1940: 24.3%
Built 2010 or later: 4.7%

When the homes in Delavan were built

Housing units by year structure built, 2020–2024
Year built	Delavan	Walworth County	Wisconsin	United States
2020 or later	0.0% (±0.5 points)	1.2%	1.4%	2.0%
2010 to 2019	4.7% (±2.5 points)	6.5%	7.1%	9.4%
2000 to 2009	11.1% (±4.4 points)	15.0%	12.5%	13.6%
1990 to 1999	13.7% (±3.7 points)	15.3%	12.5%	12.4%
1980 to 1989	5.8% (±2.4 points)	8.2%	9.5%	12.9%
1970 to 1979	12.3% (±4.4 points)	13.8%	14.2%	14.2%
1960 to 1969	11.5% (±4.6 points)	9.7%	9.4%	9.9%
1950 to 1959	10.6% (±3.8 points)	9.2%	10.3%	9.5%
1940 to 1949	6.0% (±3.3 points)	5.6%	5.3%	4.4%
1939 or earlier	24.3% (±4.8 points)	15.5%	17.8%	11.7%

In Delavan, the share of homes built before 1980 is higher than in Walworth County (53.8%).

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

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

In Walworth County, Delavan ranks 3 of 28 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 448 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 (52.4%) and the share built before 1980 (64.7%).

Homes built before 1980 in places near Delavan

Nearest places with a published estimate, compared with Delavan
Place	Distance	Homes built before 1980	Compared with this place
Delavan	—	64.7% (±9.4 points)	—
Delavan Lake	2.2 mi	49.8% (±9.7 points)	Lower
Town of Delavan	3.3 mi	56.4% (±8.3 points)	Not measurably different
Town of Walworth	4.3 mi	52.2% (±10.7 points)	Not measurably different
Town of Darien	4.7 mi	56.5% (±13.4 points)	Not measurably different
Darien	4.8 mi	54.2% (±17.8 points)	Not measurably different
Elkhorn	5.5 mi	41.8% (±7.6 points)	Lower
Williams Bay	5.6 mi	47.5% (±10.1 points)	Lower
Town of Sugar Creek	6.1 mi	62.1% (±14.5 points)	Not measurably different

Nearby places with a measurably lower figure: Delavan Lake, WI (49.8%), Elkhorn, WI (41.8%), Williams Bay, WI (47.5%).

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

Homes built before 1980 across Walworth County, place by place

Rank	Place	Homes built before 1980
1	Town of Sharon (Walworth County)	71.6% (±14.2 points)
2	Sharon	64.9% (±10.0 points)
3	Delavan	64.7% (±9.4 points)
4	Town of Sugar Creek	62.1% (±14.5 points)
5	Town of Linn	60.7% (±6.6 points)
6	Town of Lyons	60.1% (±14.8 points)
7	Town of Whitewater	59.6% (±10.8 points)
8	Bloomfield	59.3% (±15.7 points)
9	Fontana-on-Geneva Lake	58.3% (±8.2 points)

Showing 9 of 28 places in Walworth 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 Delavan

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 Delavan, 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 Delavan beside you.

Create a landlord account · See what landlords get

Looking for a place to rent?

Browse homes for rent near Delavan, save the ones you like and apply online.

Browse rentals · Create a renter account

Questions about Delavan

How old are most homes in Delavan?

64.7% of homes in Delavan, WI were built before 1980 (2020–2024 American Community Survey).

Do homes in Delavan 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 52.4% and 64.7% of homes in Delavan were built before then.

Does a contractor need lead certification to work on older homes in Delavan?

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 — Delavan 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 Delavan city, Wisconsin (place:19450, 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_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.