How old are the homes in Mastic Beach, NY?

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

74.9% (±10.9 points) of the homes in Mastic Beach, NY were built before 1980 (2020–2024 American Community Survey).

4.8% were built before 1940.

3.6% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 74.9% (±10.9 points)
Built before 1940: 4.8%
Built 2010 or later: 3.6%

When the homes in Mastic Beach were built

Housing units by year structure built, 2020–2024
Year built	Mastic Beach	Suffolk County	New York	United States
2020 or later	1.2% (±1.1 points)	0.7%	0.8%	2.0%
2010 to 2019	2.4% (±1.6 points)	3.7%	5.3%	9.4%
2000 to 2009	5.2% (±2.3 points)	8.3%	6.4%	13.6%
1990 to 1999	7.1% (±2.3 points)	8.9%	5.9%	12.4%
1980 to 1989	9.2% (±3.7 points)	10.2%	7.7%	12.9%
1970 to 1979	26.3% (±7.6 points)	17.8%	9.8%	14.2%
1960 to 1969	13.9% (±5.6 points)	19.7%	12.1%	9.9%
1950 to 1959	18.9% (±4.2 points)	17.2%	14.1%	9.5%
1940 to 1949	11.0% (±3.1 points)	4.5%	7.6%	4.4%
1939 or earlier	4.8% (±1.7 points)	9.1%	30.3%	11.7%

In Mastic Beach, the share of homes built before 1980 is not measurably different from Suffolk County (68.3%).

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

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

In Suffolk County, Mastic Beach ranks 38 of 112 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 187 of 414.

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 (48.6%) and the share built before 1980 (74.9%).

Homes built before 1980 in places near Mastic Beach

Nearest places with a published estimate, compared with Mastic Beach
Place	Distance	Homes built before 1980	Compared with this place
Mastic Beach	—	74.9% (±10.9 points)	—
Poospatuck Reservation	1.6 mi	36.3% (±27.3 points)	Lower
Moriches	2.8 mi	26.9% (±9.7 points)	Lower
Shirley	2.8 mi	66.1% (±7.2 points)	Not measurably different
Mastic	3.1 mi	54.5% (±8.1 points)	Lower
Center Moriches	3.1 mi	53.6% (±10.5 points)	Lower
Brookhaven (community)	3.8 mi	73.5% (±15.4 points)	Not measurably different
East Moriches	5.1 mi	54.3% (±10.7 points)	Lower
Village of Bellport	5.6 mi	81.8% (±11.9 points)	Not measurably different

Nearby places with a measurably lower figure: Poospatuck Reservation, NY (36.3%), Moriches, NY (26.9%), Mastic, NY (54.5%).

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

Homes built before 1980 across Suffolk County, place by place

Rank	Place	Homes built before 1980
32	Rocky Point	77.6% (±10.1 points)
33	Islip (community)	77.2% (±7.8 points)
34	Halesite	77.1% (±16.0 points)
35	West Bay Shore	76.3% (±14.5 points)
36	East Patchogue	75.7% (±7.8 points)
37	Oakdale	75.5% (±11.5 points)
38 (tie)	Mastic Beach	74.9% (±10.9 points)
38 (tie)	Mattituck	74.9% (±16.3 points)
38 (tie)	North Bay Shore	74.9% (±9.0 points)
41	Wheatley Heights	74.8% (±11.6 points)
42	Hauppauge	74.7% (±5.5 points)
43	Lake Ronkonkoma	74.6% (±8.3 points)
44	Smithtown (community)	74.2% (±6.3 points)

Showing 13 of 112 places in Suffolk County, ranked from highest to lowest.

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

It lies inside the Town of Brookhaven, 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 Mastic Beach

How old are most homes in Mastic Beach?

74.9% of homes in Mastic Beach, NY were built before 1980 (2020–2024 American Community Survey).

Do homes in Mastic Beach 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 48.6% and 74.9% of homes in Mastic Beach were built before then.

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

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 — Mastic Beach CDP, 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 Mastic Beach CDP, New York (place:46085, in state:36).

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.