Plumbing Inspections & WSSC

Water and sewer inspection, female inspector inspects pipes


WSSC has a satellite office at the Department of Permitting, Inspections, and Enforcement located at 9400 Peppercorn Place, Suite 650. The office is staffed by members of WSSC’s Development Services Group, including a Project Manager Supervisor and a Project Manager. The office hours of operation are Monday, Tuesday, Thursday and Friday 8 a.m.–3 p.m. and Wednesday 9 a.m.–3 p.m. The office closes for lunch every day from Noon to 12:30 p.m.

This office provides customers dealing with private new development or redevelopment projects support and coordination to facilitate the process of obtaining WSSC water and/or sewer plan approvals and permits including:

  • Coordinate WSSC approvals necessary for building permit release.
  • Review electronic water- and/or sewer-related plans:
    • Systems Extension Permits
    • Site Utility Plans
    • Minor Site Utility Plans
    • Hydraulic Analysis
    • Planning Commission Preliminary Plans
  • Provide guidance and information regarding permitting processes.
  • Joint WSSC and county staff consultation of construction projects and development.
  • Joint WSSC and DPIE issue resolution as part of the development subdivision/site plan approval process.
  • Manage plumbing and gas service connection permits electronically via the Momentum portal.

Plumbing inspections are handled by the Washington Suburban Sanitary Commission.
Please call them at 301-206-8886. Or call 301-206-4003 for more information.

Contact Inspections Division



9200 Basil Court
Suite 307
Largo, MD 20774