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Residential Permits


Have Questions? We have answers! Send us an email at or
call the Office of Wastewater Management to schedule a meeting with one of our staff to discuss your proposed project at (631) 852-5700

If you are constructing a new home or modifying an existing home, you may need Department of Health Services Office of Wastewater Management approval to confirm the proposed or sewage disposal system will meet the requirements of Suffolk County’s Sanitary Code. This site contains important information regarding this process including applications, instructions, standards and guidelines to assist the applicant in completing the application process. Remember, submission of a complete application and design plan will result in a faster approval process.

Permit Applications for New Single Family Dwelling

Permit Applications for Additions, Remodeling, Conversion or Sanitary Upgrade to Single Family Dwelling

Permit Applications for Accessory Apartment

Permit Applications for Extension, Renewal or Transfer of Existing Permit of a Single Family Dwelling

Final Approval for Residential Project

Additional Information for Permits

Suffolk County Government

H. Lee Dennison Bldg

100 Veterans Memorial Hwy
P.O. Box 6100
Hauppauge, NY 11788

Riverhead County Center

County Road 51
Riverhead, NY 11901