How old are the homes in Middlesex Township (Butler County), PA?

Name: Age of homes in Middlesex Township (Butler County), PA, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

55.9% (±12.0 points) of the homes in Middlesex Township (Butler County), PA were built before 1980 (2020–2024 American Community Survey).

12.5% were built before 1940.

20.0% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 55.9% (±12.0 points)
Built before 1940: 12.5%
Built 2010 or later: 20.0%

When the homes in Middlesex Township (Butler County) were built

Housing units by year structure built, 2020–2024
Year built	Middlesex Township (Butler County)	Butler County	Pennsylvania	United States
2020 or later	6.1% (±3.6 points)	2.4%	1.0%	2.0%
2010 to 2019	13.9% (±4.5 points)	9.6%	5.1%	9.4%
2000 to 2009	9.8% (±5.3 points)	13.2%	8.1%	13.6%
1990 to 1999	11.5% (±4.6 points)	14.3%	8.9%	12.4%
1980 to 1989	2.9% (±2.2 points)	10.3%	9.6%	12.9%
1970 to 1979	6.9% (±3.1 points)	11.9%	12.4%	14.2%
1960 to 1969	18.3% (±6.0 points)	8.6%	9.9%	9.9%
1950 to 1959	11.7% (±4.1 points)	9.4%	13.0%	9.5%
1940 to 1949	6.5% (±4.3 points)	4.8%	7.0%	4.4%
1939 or earlier	12.5% (±7.9 points)	15.5%	25.0%	11.7%

In Middlesex Township (Butler County), the share of homes built before 1980 is not measurably different from Butler County (50.2%).

It is not measurably different from Pennsylvania (67.3%).

It is not measurably different from the national figure (49.7%).

In Butler County, Middlesex Township (Butler County) ranks 30 of 57 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 1751 of 2,558.

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 (49.0%) and the share built before 1980 (55.9%).

Homes built before 1980 in places near Middlesex Township (Butler County)

Nearest places with a published estimate, compared with Middlesex Township (Butler County)
Place	Distance	Homes built before 1980	Compared with this place
Middlesex Township (Butler County)	—	55.9% (±12.0 points)	—
Bakerstown	3.7 mi	25.9% (±10.1 points)	Lower
Valencia	3.8 mi	28.0% (±12.9 points)	Lower
Adams Township (Butler County)	4.2 mi	19.5% (±4.9 points)	Lower
Mars	4.6 mi	83.8% (±15.4 points)	Higher
Richland Township (Allegheny County)	4.7 mi	46.5% (±9.1 points)	Not measurably different
Clinton Township (Butler County)	5.1 mi	51.2% (±10.0 points)	Not measurably different
Nixon	5.5 mi	68.0% (±21.6 points)	Not measurably different
Penn Township (Butler County)	5.6 mi	63.6% (±11.8 points)	Not measurably different

Nearby places with a measurably lower figure: Bakerstown, PA (25.9%), Valencia, PA (28.0%), Adams Township (Butler County), PA (19.5%).

Nearby places with a measurably higher figure: Mars, PA (83.8%).

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

Homes built before 1980 across Butler County, place by place

Rank	Place	Homes built before 1980
24	Prospect	60.3% (±13.6 points)
25	Mercer Township	58.5% (±12.9 points)
26 (tie)	Slippery Rock	57.1% (±13.3 points)
26 (tie)	Brady Township (Butler County)	57.1% (±14.1 points)
28	Center Township (Butler County)	56.7% (±9.7 points)
29	Donegal Township (Butler County)	56.5% (±11.8 points)
30	Middlesex Township (Butler County)	55.9% (±12.0 points)
31	Slippery Rock Township (Butler County)	53.2% (±14.0 points)
32	West Liberty	53.0% (±15.3 points)
33	Saxonburg	52.4% (±10.7 points)
34	Oakland Township (Butler County)	51.7% (±9.7 points)
35	Clinton Township (Butler County)	51.2% (±10.0 points)
36	Clay Township (Butler County)	50.9% (±11.3 points)

Showing 13 of 57 places in Butler 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 Middlesex Township (Butler County)

How old are most homes in Middlesex Township (Butler County)?

55.9% of homes in Middlesex Township (Butler County), PA were built before 1980 (2020–2024 American Community Survey).

Do homes in Middlesex Township (Butler 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 49.0% and 55.9% of homes in Middlesex Township (Butler County) were built before then.

Does a contractor need lead certification to work on older homes in Middlesex Township (Butler 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 — Middlesex township, Butler County, Pennsylvania

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 Middlesex township, Butler County, Pennsylvania (county subdivision:49056, in state:42 county:019).

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.