How old are the homes in Mason, OH?

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

21.8% (±3.5 points) of the homes in Mason, OH were built before 1980 (2020–2024 American Community Survey).

1.7% were built before 1940.

16.6% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 21.8% (±3.5 points)
Built before 1940: 1.7%
Built 2010 or later: 16.6%

When the homes in Mason were built

Housing units by year structure built, 2020–2024
Year built	Mason	Warren County	Ohio	United States
2020 or later	1.1% (±0.7 points)	3.2%	1.1%	2.0%
2010 to 2019	15.5% (±2.6 points)	13.8%	5.6%	9.4%
2000 to 2009	23.1% (±3.4 points)	22.2%	9.7%	13.6%
1990 to 1999	28.8% (±3.9 points)	20.1%	11.1%	12.4%
1980 to 1989	9.8% (±2.0 points)	9.4%	9.1%	12.9%
1970 to 1979	10.5% (±2.2 points)	10.3%	14.0%	14.2%
1960 to 1969	4.6% (±2.1 points)	7.2%	11.7%	9.9%
1950 to 1959	4.2% (±1.3 points)	6.6%	13.1%	9.5%
1940 to 1949	0.8% (±0.6 points)	1.6%	5.6%	4.4%
1939 or earlier	1.7% (±0.8 points)	5.6%	19.0%	11.7%

In Mason, the share of homes built before 1980 is lower than in Warren County (31.3%).

It is also lower than in Ohio (63.4%).

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

In Warren County, Mason ranks 25 of 29 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 2329 of 2,382.

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 (11.3%) and the share built before 1980 (21.8%).

Homes built before 1980 in places near Mason

Nearest places with a published estimate, compared with Mason
Place	Distance	Homes built before 1980	Compared with this place
Mason	—	21.8% (±3.5 points)	—
Deerfield Township (Warren County)	2.4 mi	15.8% (±2.4 points)	Lower
Kings Mills	2.8 mi	30.9% (±23.1 points)	Not measurably different
Landen	3.2 mi	29.4% (±6.8 points)	Not measurably different
Four Bridges	3.7 mi	5.5% (±5.7 points)	Lower
South Lebanon	4.1 mi	32.1% (±12.3 points)	Not measurably different
Wetherington	4.3 mi	0.0% (±12.7 points)	Lower
Loveland Park	4.8 mi	46.6% (±15.1 points)	Higher
Union Township (Warren County)	5.1 mi	38.6% (±10.4 points)	Higher

Nearby places with a measurably lower figure: Deerfield Township (Warren County), OH (15.8%), Four Bridges, OH (5.5%), Wetherington, OH (0.0%).

Nearby places with a measurably higher figure: Loveland Park, OH (46.6%), Union Township (Warren County), OH (38.6%).

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

Homes built before 1980 across Warren County, place by place

Rank	Place	Homes built before 1980
18 (tie)	Turtlecreek Township	32.1% (±6.3 points)
20	Kings Mills	30.9% (±23.1 points)
21	Landen	29.4% (±6.8 points)
22	Clear Creek Township (Warren County)	25.8% (±3.7 points)
23	Springboro	24.7% (±4.2 points)
24	Five Points	22.3% (±11.9 points)
25	Mason	21.8% (±3.5 points)
26	Corwin	19.8% (±8.3 points)
27	Deerfield Township (Warren County)	15.8% (±2.4 points)
28	Hamilton Township (Warren County)	15.0% (±3.5 points)
29	Maineville	10.9% (±5.1 points)

Showing 11 of 29 places in Warren 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 Mason

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 Mason, 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 Mason beside you.

Create a landlord account · See what landlords get

Looking for a place to rent?

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

Browse rentals · Create a renter account

Questions about Mason

How old are most homes in Mason?

21.8% of homes in Mason, OH were built before 1980 (2020–2024 American Community Survey).

Do homes in Mason 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 11.3% and 21.8% of homes in Mason were built before then.

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

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 — Mason city, Ohio

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 Mason city, Ohio (place:48188, in state:39).

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.