Short answer: The Nassau County Department of Health lists Glen Head as not publicly sewered, so homes here run on cesspools, septic tanks or I/A systems. Nassau's S.E.P.T.I.C. grant for eligible nitrogen-reducing upgrades is up to $35,000 per its administrator (details below).
Glen Head in numbers
| Town | Town of Oyster Bay |
|---|---|
| Status | Unincorporated hamlet |
| Area | 1.64 sq mi |
| Sewer (county list) | Not publicly sewered |
| Parcels / median parcel | about 1,857 / 0.21 ac |
| Building permits | Town of Oyster Bay |
Area and parcels computed 2026-11-07 from Nassau County GIS (place boundary; all tax parcels touching it, any use). Sewer status from the Nassau County Department of Health list of sewer districts by community, which is by community, not street.
Sewer status and lots
The Nassau County Department of Health lists Glen Head as not publicly sewered, so homes here run on cesspools, septic tanks or I/A systems. Glen Head covers 1.64 square miles; the roughly 1,857 parcels touching its boundary have a median size of 0.21 acres (about 9,200 sq ft). That is the 43rd-largest median parcel of the 133 Nassau places we measured. Nearby: Sea Cliff (not publicly sewered, median parcel 0.19 ac); Old Brookville (not publicly sewered, median parcel 2.05 ac); Roslyn Harbor (not publicly sewered, median parcel 1.00 ac).
Grant and permits
Because the county lists Glen Head outside public sewer, its homes fall in the area Nassau's S.E.P.T.I.C. grant was designed for, subject to the program's property test. Permits come from the Town of Oyster Bay; the contractor needs a Nassau County Home Improvement License, and no county rule we found requires an I/A system for an existing home.
For Glen Head properties, Nassau grant amount and no-stacking details are on the Nassau County overview and Long Island grants guide.
Who handles what in Glen Head
- Building permits: Town of Oyster Bay
- S.E.P.T.I.C. grants: 516-364-5861 ([email protected])
Frequently asked questions
Is Glen Head on public sewer?
The Nassau County Department of Health lists Glen Head as not publicly sewered, so homes here run on cesspools, septic tanks or I/A systems.
Who issues permits for septic work in Glen Head?
The Town of Oyster Bay building department, with a contractor holding a Nassau County Home Improvement License.
Rules and grant steps: Town of Oyster Bay overview, Nassau regulations, S.E.P.T.I.C. details. More nearby: Sea Cliff, Locust Valley, East Hills, Flower Hill.
Sources
Each source was re-read on November 7, 2026. Program amounts and rules change; the agency page is the authority.
- Nassau County DOH: Public sewer districts by community
- Nassau County GIS map service (place boundaries, tax parcels)
- Nassau County Soil & Water Conservation District: S.E.P.T.I.C. program (program administrator)
- Nassau County: S.E.P.T.I.C. program
Need cesspool or septic work in Glen Head?
Submit a request with your address. We match it to an independent operator with a Nassau County Home Improvement License who serves that address; the operator confirms the time and price with you.
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