How old are the homes in Martinsville, NJ?

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

61.9% (±6.9 points) of the homes in Martinsville, NJ were built before 1980 (2020–2024 American Community Survey).

4.0% were built before 1940.

2.9% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 61.9% (±6.9 points)
Built before 1940: 4.0%
Built 2010 or later: 2.9%

When the homes in Martinsville were built

Housing units by year structure built, 2020–2024
Year built	Martinsville	Somerset County	New Jersey	United States
2020 or later	0.0% (±1.1 points)	1.3%	1.1%	2.0%
2010 to 2019	2.9% (±1.2 points)	6.1%	6.2%	9.4%
2000 to 2009	6.5% (±2.1 points)	9.7%	9.2%	13.6%
1990 to 1999	21.3% (±3.4 points)	16.8%	8.9%	12.4%
1980 to 1989	7.5% (±2.5 points)	19.7%	11.8%	12.9%
1970 to 1979	12.8% (±3.1 points)	9.3%	12.3%	14.2%
1960 to 1969	28.8% (±4.3 points)	12.9%	12.8%	9.9%
1950 to 1959	12.2% (±3.6 points)	10.3%	13.8%	9.5%
1940 to 1949	4.1% (±1.8 points)	4.5%	6.5%	4.4%
1939 or earlier	4.0% (±1.9 points)	9.3%	17.4%	11.7%

In Martinsville, the share of homes built before 1980 is higher than in Somerset County (46.3%).

It is not measurably different from New Jersey (62.8%).

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

In Somerset County, Martinsville ranks 6 of 24 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 122 of 252.

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 (49.1%) and the share built before 1980 (61.9%).

Homes built before 1980 in places near Martinsville

Nearest places with a published estimate, compared with Martinsville
Place	Distance	Homes built before 1980	Compared with this place
Martinsville	—	61.9% (±6.9 points)	—
Green Knoll	2.0 mi	51.1% (±8.2 points)	Lower
Somerville Borough	2.8 mi	76.1% (±7.7 points)	Higher
Finderne	2.9 mi	56.6% (±13.1 points)	Not measurably different
Bound Brook Borough	3.2 mi	71.8% (±9.1 points)	Not measurably different
Bridgewater Center	3.7 mi	72.4% (±9.9 points)	Not measurably different
Warren Township	3.7 mi	40.2% (±5.5 points)	Lower
Liberty Corner	4.1 mi	48.0% (±16.7 points)	Not measurably different
South Bound Brook Borough	4.2 mi	77.4% (±14.2 points)	Not measurably different

Nearby places with a measurably lower figure: Green Knoll, NJ (51.1%), Warren Township, NJ (40.2%).

Nearby places with a measurably higher figure: Somerville Borough, NJ (76.1%).

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

Homes built before 1980 across Somerset County, place by place

Rank	Place	Homes built before 1980
1	Bedminster	75.0% (±15.8 points)
2	Bridgewater Center	72.4% (±9.9 points)
3	Kingston	68.7% (±30.6 points)
4	East Franklin	62.1% (±13.0 points)
5	Basking Ridge	62.0% (±9.7 points)
6	Martinsville	61.9% (±6.9 points)
7	Middlebush	57.1% (±25.8 points)
8	Finderne	56.6% (±13.1 points)
9	Green Knoll	51.1% (±8.2 points)
10	Somerset	49.4% (±6.2 points)
11	Liberty Corner	48.0% (±16.7 points)
12	Lyons	32.8% (±9.2 points)

Showing 12 of 24 places in Somerset County, ranked from highest to lowest.

Martinsville is a census-designated place: an unincorporated community the Census Bureau draws for statistics, with no municipal government of its own.

It lies inside Bridgewater Township, whose figures include it.

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 Martinsville

How old are most homes in Martinsville?

61.9% of homes in Martinsville, NJ were built before 1980 (2020–2024 American Community Survey).

Do homes in Martinsville 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 49.1% and 61.9% of homes in Martinsville were built before then.

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

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 — Martinsville CDP, New Jersey

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 Martinsville CDP, New Jersey (place:44430, in state:34).

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.