Short answer: Sea Cliff has no public sewer collection district on the county health department's list; wastewater is handled on each lot. Nassau's S.E.P.T.I.C. grant for eligible nitrogen-reducing upgrades is up to $35,000 per its administrator (details below).
Sea Cliff in numbers
| Town | Town of Oyster Bay |
|---|---|
| Status | Incorporated village |
| Area | 1.09 sq mi |
| Sewer (county list) | Not publicly sewered |
| Parcels / median parcel | about 1,983 / 0.19 ac |
| Building permits | Village of Sea Cliff |
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
Sea Cliff has no public sewer collection district on the county health department's list; wastewater is handled on each lot. About 1,983 tax parcels touch Sea Cliff's 1.09 square miles, with a median of 0.19 acres (about 8,300 sq ft). That is the 49th-largest median parcel of the 133 Nassau places we measured. Nearby: Glen Head (not publicly sewered, median parcel 0.21 ac); Glenwood Landing (not publicly sewered, median parcel 0.19 ac); Roslyn Harbor (not publicly sewered, median parcel 1.00 ac).
Grant and permits
Because the county lists Sea Cliff 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 Village of Sea Cliff; 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 Sea Cliff properties, Nassau grant amount and no-stacking details are on the Nassau County overview and Long Island grants guide.
Who handles what in Sea Cliff
- Building permits: Village of Sea Cliff
- S.E.P.T.I.C. grants: 516-364-5861 ([email protected])
Frequently asked questions
Is Sea Cliff on public sewer?
Sea Cliff has no public sewer collection district on the county health department's list; wastewater is handled on each lot.
Who issues permits for septic work in Sea Cliff?
The Village of Sea Cliff 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: Glen Head, Port Washington, Flower Hill, East Hills.
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 Sea Cliff?
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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