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SPU regulates new water services and changes to existing water services. Our water service areas include:
SPU issues a water availability certificate to confirm that there is adequate domestic water flow, fire flow, and water pressure to accommodate or supply new development. The water availability certificate is a basic report that we prepare for parcel owners who need new water service, like for a new construction or when renovating a facility to use for a new purpose.
There are two ways to apply for a water availability certificate.
If your project is within the City of Seattle, apply for a building or master use permit from Seattle Department of Construction and Inspections (SDCI). They will request a water availability certificate for you as part of their process.
If your project is in an SPU direct water service area outside of the City of Seattle, apply directly for a water availability certificate (pdf).
Water availability certificates are typically issued via email within 5 business days, depending on the volume of requests. There is no charge for this service.
SPU issues a water availability certificate to confirm that there is adequate domestic water flow, and water pressure to accommodate or supply new development. The water availability certificate is a basic report that we prepare for parcel owners who need new water service, like for new construction or renovating a facility to use for a new purpose.
The water availability certificate may show fire flow information for a nearby tested or modeled hydrant, but doesn’t determine whether the fire flow is adequate. Fire flow requirements are determined by your local fire department.
A water availability certificate is required for most development projects in Seattle or SPU-direct water service areas. Information about on-site or privately owned water mains or hydrants isn’t included.
Washington state building code RCW 19.27.097 requires that building permit applicants provide proof of adequate water supply for the intended use of the parcel. For Seattle, the document used to provide adequate proof is the water availability certificate. In addition, SPU wants to ensure that:
Property owners who are constructing a new building or renovating an existing building to use for a new purpose typically need a water availability certificate. The following project types require a water availability certificate:
Not all projects require a water availability certificate. SPU and the Seattle Department of Construction & Inspections (SDCI) will determine whether a water availability certificate is required based upon project parameters. In some cases, such as replacing one single family residence with another single-family residence, SDCI will issue a water availability approval without requiring a water availability certificate from SPU.
Seattle Municipal Code (SMC) outlines water rates and regulations in SMC Chapter 21.04. The State of Washington defines basic regulatory requirements to protect the health of consumers using public drinking water in WAC Chapter 246-290.
For more information on water availability certificates, contact SPUwateravailability@seattle.gov