South of the village.
Wikipedia says South Hempstead is named for its spot south of the Village of Hempstead. It's a small, almost entirely single-family hamlet: the Census counts about 1,160 homes, 97% of them detached houses and 96% owner-occupied. The CDP covers 0.6 square miles, all land.
The Census Bureau's latest five-year survey counts about 1,200 homes, with a median year built of 1954. 56% went up in the 1950s, 9% before 1940, and 6% after 1980. 97% are single-family detached houses, and 96% are owner-occupied.
So a typical house here has drain and water lines around 72 years old unless they've been replaced. Slow drains in several fixtures, a gurgling floor drain or rusty water from one tap are signs to have the main line and supply piping checked.
Oil to gas means new gas piping.
The ACS shows 70% of homes heat with utility gas and 22% with fuel oil. Switching means properly sized gas piping to the new equipment, and often to the water heater, range and dryer. We do the gas line work. We don't sell or deliver oil.
On the sewer.
Nassau County's health department lists South Hempstead's sewers under the Nassau County Department of Public Works (516-571-6841). A backup that stops at your house is usually in your own line to the street; we clear it and repair or replace the line. If neighbors are backed up too, call the county at 516-571-6841.
Little mapped flood risk.
FEMA's current flood map puts none of South Hempstead in the high-risk flood zone.
Water: Liberty Utilities New York's Lynbrook system.
EPA's service-area map puts about 98% of residents on Liberty Utilities New York's Lynbrook system, with about 2% on the Village of Rockville Centre's water system; your bill is the final word. Liberty's 2026 report on 2025 water for its Lynbrook Operations District says caustic soda or lime raises the pH to cut corrosion of household plumbing and iron is filtered out at 13 of its 20 well sites; total hardness ran 4.2 to 58.6 mg/L, which is soft. Across the whole district, Liberty's state-filed inventory counts 3,700 lead service lines and 15,239 of unknown material, so if your house predates 1940 it's worth knowing what your service line is. In EPA's UCMR 5 testing, the main supplier's highest single PFOA/PFOS result was 5.1 parts per trillion. EPA's 4 ppt limits apply as a running annual average starting in 2029, so one high sample is not a violation, but it's the kind of number a carbon filter is sized against. For a leak at the curb or in the street, call your water supplier. For anything on your side of the meter, call us.
Permits.
South Hempstead is an unincorporated hamlet, so plumbing permits go through the Town of Hempstead Building Department (One Washington Street, Hempstead).
