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Suffolk County septic grant checker

Answer 11 quick questions to see whether you're likely eligible for the Suffolk County Septic Improvement Program (SIP) and New York State Septic System Replacement Program (SSRP) grants, and roughly how much they could cover. Nothing you enter here leaves your browser.

This is an informal estimate based on the county's and state's published rules as of October 17, 2026. Only Suffolk County Department of Health Services decides eligibility and grant amounts. Independent guide. Not affiliated with, endorsed by, or operated by Suffolk County, New York State, or any installer.

TownChoose your town…BabylonBrookhavenEast HamptonHuntingtonIslipRiverheadShelter IslandSmithtownSouthamptonSoutholdNot sure / village or hamlet

How is your home's wastewater handled today?

CesspoolSeptic tank + leaching pool (conventional septic)Connected to a public sewerNot sure

Is the property inside a sewer district or a proposed sewer district?

The county map tool below can tell you.

NoYesNot sure

What kind of property is it?

Single-family homeTwo-family homeSingle-family with one accessory apartmentVacant lot / new constructionSomething else (condo, commercial, 3+ units)

Is it your primary residence?

Yes, I live there year-roundNo, it's a seasonal or second home

Does the property have a valid Certificate of Occupancy, a deed recorded with the Suffolk County Clerk, and current property taxes with no liens or foreclosure?

Yes, all of theseNot sure about one of themNo, at least one is a problem

What condition is the current system in?

Failing (backups, collapse, sewage on the surface)Signs of trouble (slow drains, gurgling, pumping 2+ times a year)Working fine, I just want to upgrade

Is your property in a county priority area?

Look up your address on the county's SIP eligibility map [county tool].

Yes, a Priority Critical Area (0–2 yr travel time / within 1,000 ft of enclosed water)Yes, a Critical Area (2–25 yr travel time)No, outside priority areasI haven't checked

Do you think your household is low-to-moderate income?

Older state descriptions of the county program mention a $5,000 low-to-moderate-income component. The county sets any income limits; we don't ask for your actual income.

Probably yesProbably notNot sure

How many bedrooms?

System size is based on bedrooms; the county publishes prices for 4-, 5- and 6-bedroom sizes.

1 to 456 or more

Do you know what kind of leaching system you'll need?

Your installer or design professional determines this.

Reusing the existing leaching structureNew gravity leaching structurePressurized shallow drainfieldDon't know yet

See my estimate

Sources

• Suffolk County – Septic Grants Information Homepage — page accessed Oct 17, 2026
• Suffolk County – Septic Improvement Program FAQ (April 2026, PDF) — dated 4-2026
• Suffolk County – Septic Improvement Program Grant Process Overview (2026, PDF) — 2026 edition
• Suffolk County – “Suffolk County’s Septic Grant Program” flyer (PDF) — revised 9-29-2026
• Suffolk County – SIP Eligibility address lookup (map tool) — accessed Oct 17, 2026
• NYS DEC – State Septic System Replacement Fund Program (SSRP) — page accessed Oct 17, 2026
• NYS DEC/EFC – State Septic System Replacement Fund Program Outline Summary (PDF) — June 2026 edition
• Suffolk County – SIP Vendor Cost Ranking, 4-bedroom home (PDF) — rev. 2025-11-06
• Suffolk County – SIP Vendor Cost Ranking, 5-bedroom home (PDF) — rev. 2025-11-06
• Suffolk County – SIP Vendor Cost Ranking, 6-bedroom home (PDF) — rev. 2025-11-06
• Suffolk County DHS – What Homeowners Should Know About I/A OWTS (PDF) — dated 5-5-2026

Last reviewed October 17, 2026. Program rules change; always confirm with Suffolk County Department of Health Services (631-852-5811, SepticGrants@SuffolkCountyNY.gov).