How old are the homes in South Valley Stream, NY?

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

94.0% (±13.7 points) of the homes in South Valley Stream, NY were built before 1980 (2020–2024 American Community Survey).

13.8% were built before 1940.

0.3% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 94.0% (±13.7 points)
Built before 1940: 13.8%
Built 2010 or later: 0.3%

When the homes in South Valley Stream were built

Housing units by year structure built, 2020–2024
Year built	South Valley Stream	Nassau County	New York	United States
2020 or later	0.0% (±2.2 points)	0.8%	0.8%	2.0%
2010 to 2019	0.3% (±0.8 points)	3.2%	5.3%	9.4%
2000 to 2009	3.8% (±5.2 points)	3.3%	6.4%	13.6%
1990 to 1999	1.9% (±1.9 points)	2.7%	5.9%	12.4%
1980 to 1989	0.0% (±2.2 points)	4.7%	7.7%	12.9%
1970 to 1979	2.6% (±2.6 points)	6.1%	9.8%	14.2%
1960 to 1969	18.4% (±6.4 points)	13.2%	12.1%	9.9%
1950 to 1959	55.5% (±9.5 points)	33.9%	14.1%	9.5%
1940 to 1949	3.7% (±2.7 points)	13.0%	7.6%	4.4%
1939 or earlier	13.8% (±6.6 points)	19.2%	30.3%	11.7%

In South Valley Stream, the share of homes built before 1980 is not measurably different from Nassau County (85.4%).

It is also higher than in New York (73.9%).

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

In Nassau County, South Valley Stream ranks 9 of 62 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 15 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 (91.4%) and the share built before 1980 (94.0%).

Homes built before 1980 in places near South Valley Stream

Nearest places with a published estimate, compared with South Valley Stream
Place	Distance	Homes built before 1980	Compared with this place
South Valley Stream	—	94.0% (±13.7 points)	—
Village of Valley Stream	0.9 mi	91.9% (±6.8 points)	Not measurably different
Woodmere	1.3 mi	91.5% (±9.3 points)	Not measurably different
Hewlett	1.6 mi	93.6% (±16.6 points)	Not measurably different
Village of Hewlett Bay Park	1.9 mi	63.2% (±15.6 points)	Lower
North Valley Stream	2.0 mi	89.1% (±9.1 points)	Not measurably different
Village of Cedarhurst	2.2 mi	92.5% (±20.0 points)	Not measurably different
Village of Hewlett Harbor	2.3 mi	89.0% (±11.2 points)	Not measurably different
Village of Lynbrook	2.3 mi	93.5% (±8.4 points)	Not measurably different

Nearby places with a measurably lower figure: Village of Hewlett Bay Park, NY (63.2%).

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

Homes built before 1980 across Nassau County, place by place

Rank	Place	Homes built before 1980
3	West Hempstead	96.0% (±7.5 points)
4	Lido Beach	95.7% (±19.6 points)
5	Levittown	95.1% (±4.9 points)
6	South Farmingdale	95.0% (±6.7 points)
7	University Gardens	94.8% (±13.6 points)
8	North New Hyde Park	94.5% (±8.4 points)
9	South Valley Stream	94.0% (±13.7 points)
10	North Massapequa	93.9% (±6.5 points)
11 (tie)	Hewlett	93.6% (±16.6 points)
11 (tie)	South Hempstead	93.6% (±15.9 points)
13	Manhasset Hills	93.3% (±15.2 points)
14	Salisbury (community)	92.7% (±9.5 points)
15	Baldwin (community)	92.3% (±6.4 points)

Showing 13 of 62 places in Nassau County, ranked from highest to lowest.

South Valley Stream 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 Hempstead, 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 South Valley Stream

How old are most homes in South Valley Stream?

94.0% of homes in South Valley Stream, NY were built before 1980 (2020–2024 American Community Survey).

Do homes in South Valley Stream 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 91.4% and 94.0% of homes in South Valley Stream were built before then.

Does a contractor need lead certification to work on older homes in South Valley Stream?

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 — South Valley Stream 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 South Valley Stream CDP, New York (place:69892, 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.