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Local Public Agency Program

Learn about the services the Local Public Agency Program provides, such as mitigating construction impacts, and our review process for these services.

The Local Public Agency (LPA) Program coordinates with 34 local sewer agencies and other entities that serve King County residents to provide support for engineering and construction projects that may directly or indirectly impact the County’s regional sewer system. We also work with applicants (consultants, developers, or homeowners) in coordination with their Local Agency.

The LPA team reviews design plans for local sewer agency projects, issues approval letters, and performs inspections during construction, among other services, to lessen potential impacts to the regional sewer system. We also ensure all projects comply with Washington State Department of Ecology guidelines, King County Code 28.84.050, and other rules and regulations.

Scroll down to find information on our review process for most of our services.    

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Help us help you 

Contact us as early as possible during your project’s preliminary design. We will respond to you within 15 business days, if not sooner. By working together from the start, we can help make sure your project goes smoothly.

For any projects impacting the King County sewer system, it is important that we are notified of construction start. Please see our Construction Requirements for construction notification requirements. 

Construction requirements

Information about notification requirements to the Local Public Agency team prior to construction start and requirements regarding submittals and change orders during construction.

Construction impacts

A description of construction impact projects and the roles and responsibilities of the Local Public Agency team and the local agency.

Sewer system modifications

A description of system modification projects and the roles and responsibilities of the Local Public Agency team and the local agency.

Direct sewer connections

A description of direct sewer connection projects and the roles and responsibilities of the Local Public Agency team and the local agency.

Sewer extensions

A description of sewer extension projects and the roles and responsibilities of the Local Public Agency team and the local agency.

Helpful resources

Links to County and state resources for additional information beyond the scope of the Local Public Agency Program.

How to contact us

How to contact the LPA Program and information you need to include when you contact us.

Our review process 

We use a six-step review process for most of our services*:

  • Submit your request.

    Local Agency or applicant submits request, including project location and information to the LPA Team.

  • We review and respond.

    Our team reviews and responds within 15 business days (per King County Code).

  • We coordinate with you. 

    Our team coordinates with the Local Agency (and applicant, if applicable) throughout the project life cycle.

  • We provide project requirements. 

    Our team provides project requirements for construction plans, interagency agreements, or approval letters.

  • We inspect project construction.

    Our team and/or Local Agency inspects project construction. Please review our construction requirements.

  • We collect as-constructed drawings and reports.

    The Local Agency provides our team with as-constructed drawings and sewer test results.

*Note: The review process and requirements will vary by project based on project scope, schedule, and design; easements and property rights; and LPA staff availability.

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