Seattle Public Utilities

Development Services Office

Hours and location

Seattle Municipal Tower
700 Fifth Ave, 27th floor
Seattle, WA 98124

(206) 684-3333

Monday, Wednesday - Friday: 8:00 a.m. - 5:00 p.m.
Tuesday: 10:30 a.m. - 5:00 p.m.

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Mail-in payments:
Seattle Public Utilities - DSO
PO Box 94647
Seattle, WA 98124-4647

In-person payments:
Information & Payments desk
Seattle Municipal Tower
700 Fifth Ave, 4th floor (lobby entrance)
Seattle, WA 98124

The Development Services Office (DSO) assists and coaches developers and homeowners who are looking to obtain new water utility services within the Seattle Public Utilities service area. We ensure that new development in the public right-of-way conforms to applicable code requirements. We also partner with Seattle Department of Transportation to review and approve street use permits associated with drainage, wastewater, and water main extensions.

Multiple Meter Flow Test Improvement

Beginning June 4, 2018, SPU will be making changes to the multiple meter flow test process to ensure that meters are connected to the correct private water lines in order to improve billing accuracy.

For projects with multiple two-inch and smaller water meters, SPU requires a multiple meter flow test prior to receiving water service.

  • Each meter will have a tag containing the address of the building or unit the meter is intended to supply and directions on how to contact SPU to initiate the required inspection.

An inspection will be required prior to receiving water service to ensure the private water service line from each building or unit is connected to the meter designed to serve it.

When you are ready for a flow test inspection, call 206‑684‑5800. You will need to confirm the following information:

  • Provide the correct addresses for the meters ready for a flow test inspection. The inspections cannot be requested without the correct addresses. If you are unsure of the address, check the tag in the meter box.
  • Legal addresses, as assigned by the permitting agency, are clearly visible and affixed on the building,
  • Private plumbing has been connected to the City union and passed or is ready for a Utility Service Inspection private water line inspection,
  • There are no issues to access the spigot and meter box in order to complete the flow test, and
  • The project is ready for inspection.

The inspection will typically occur within 5-business days. Once the inspection is complete, the SPU inspector will turn on the water.

This process will ensure water meters are installed in the approved manner which is important for future renters or property owners. By contacting SPU prior to the inspection, we can help clarify requirements for a successful inspection which will promote coordination and improve efficiency.

Proposed Code Amendments for Stormwater Code

We are updating our Stormwater Code. Review our Draft Stormwater Code Ordinance and 2017 Proposed Stormwater Code changes. For information on how to submit comments, please visit SDCI’s Building Connections blog.


Taps Tracker

Learn about the status of your water service project. Please have your project address or invoice number ready to search your project status.

dso map

Water and sewer research map

Use the DSO's Water and Sewer Map to research existing Seattle water, drainage, and sewer infrastructure for new property purchases or development.

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Form and resources

Use our forms and resources to access forms, maps, records, and publications.


Other questions

Waterline inspections: (206) 684-5803
Billing questions: (206) 684-3000