How old are the homes in the Town of Sempronius, NY?

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

66.4% (±12.8 points) of the homes in the Town of Sempronius, NY were built before 1980 (2020–2024 American Community Survey).

24.8% were built before 1940.

3.4% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 66.4% (±12.8 points)
Built before 1940: 24.8%
Built 2010 or later: 3.4%

When the homes in the Town of Sempronius were built

Housing units by year structure built, 2020–2024
Year built	Town of Sempronius	Cayuga County	New York	United States
2020 or later	1.7% (±2.5 points)	0.7%	0.8%	2.0%
2010 to 2019	1.7% (±1.5 points)	3.9%	5.3%	9.4%
2000 to 2009	10.3% (±4.3 points)	6.4%	6.4%	13.6%
1990 to 1999	9.3% (±5.4 points)	8.7%	5.9%	12.4%
1980 to 1989	10.5% (±4.8 points)	8.9%	7.7%	12.9%
1970 to 1979	28.0% (±8.5 points)	10.4%	9.8%	14.2%
1960 to 1969	6.3% (±4.2 points)	8.8%	12.1%	9.9%
1950 to 1959	4.4% (±4.2 points)	9.7%	14.1%	9.5%
1940 to 1949	2.9% (±3.6 points)	6.0%	7.6%	4.4%
1939 or earlier	24.8% (±6.6 points)	36.6%	30.3%	11.7%

In the Town of Sempronius, the share of homes built before 1980 is not measurably different from Cayuga County (71.5%).

It is not measurably different from New York (73.9%).

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

In Cayuga County, the Town of Sempronius ranks 7 of 24 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 364 of 1,006.

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 (38.4%) and the share built before 1980 (66.4%).

Homes built before 1980 in places near the Town of Sempronius

Nearest places with a published estimate, compared with the Town of Sempronius
Place	Distance	Homes built before 1980	Compared with this place
Town of Sempronius	—	66.4% (±12.8 points)	—
Town of Moravia	4.4 mi	71.6% (±10.4 points)	Not measurably different
Town of Scott	4.6 mi	62.1% (±15.8 points)	Not measurably different
Village of Moravia	5.3 mi	84.7% (±13.1 points)	Not measurably different
Town of Summerhill	6.1 mi	60.2% (±16.2 points)	Not measurably different
Town of Spafford	6.4 mi	67.4% (±11.3 points)	Not measurably different
Town of Niles	6.6 mi	65.9% (±11.6 points)	Not measurably different
Town of Locke	7.6 mi	48.9% (±9.1 points)	Lower
Town of Homer	9.7 mi	74.1% (±10.9 points)	Not measurably different

Nearby places with a measurably lower figure: Town of Locke, NY (48.9%).

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

Homes built before 1980 across Cayuga County, place by place

Rank	Place	Homes built before 1980
1	Auburn	87.4% (±6.0 points)
2	Town of Fleming	79.3% (±11.1 points)
3	Town of Moravia	71.6% (±10.4 points)
4	Town of Mentz	68.7% (±10.4 points)
5	Town of Owasco	67.9% (±11.8 points)
6	Town of Ledyard	66.8% (±8.3 points)
7 (tie)	Town of Sempronius	66.4% (±12.8 points)
7 (tie)	Town of Sterling	66.4% (±10.3 points)
9	Town of Niles	65.9% (±11.6 points)
10 (tie)	Town of Throop	65.8% (±9.6 points)
10 (tie)	Town of Venice	65.8% (±10.9 points)
12	Town of Scipio	63.0% (±11.0 points)
13	Town of Aurelius	61.9% (±9.3 points)

Showing 13 of 24 places in Cayuga County, ranked from highest to lowest.

A New York town includes the villages and hamlets inside it, so the figures for the Town of Sempronius include them.

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 Town of Sempronius

How old are most homes in the Town of Sempronius?

66.4% of homes in the Town of Sempronius, NY were built before 1980 (2020–2024 American Community Survey).

Do homes in the Town of Sempronius 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 38.4% and 66.4% of homes in the Town of Sempronius were built before then.

Does a contractor need lead certification to work on older homes in the Town of Sempronius?

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 — Sempronius town, Cayuga County, New York

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 Sempronius town, Cayuga County, New York (county subdivision:66278, in state:36 county:011).

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.