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Commercial 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 or modifying an existing commercial, industrial, multiple residence or other building, 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.

Applications for Other Than Single-Family Dwelling


Application to Update an Existing Commercial Project


Final Approval for Other Than Single-Family Residence


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