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Council forwards ordinances to require sewer hookup when mains are nearby; exceptions for existing homes and technical barriers
Summary
Council advanced two related code changes on first reading to require sanitary sewer connection for new subdivisions and developments when a sewer main is within 200 feet, and to require connection for failed septic systems when sewer is adjacent. Ordinances include exceptions and a Jan. 1, 2027 effective date.
Senior Planner Evan Lewis presented two linked code amendments on Oct. 21 that would establish clear, objective requirements for when properties must connect to the sanitary sewer system.
Key provisions: - For new land divisions (short/long plats, unit-lot subdivisions, binding site plans) and development on lots served by septic, a connection to sewer would be required if a sewer main is available within 200 feet of the subject property; that 200‑foot threshold aligns with County practice and several nearby cities. - For existing properties with failed septic inspections, connection would be required when a sanitary sewer is available in the public right of way adjacent to the property. - Exceptions and waivers include: an existing home on a property being subdivided (the existing dwelling may remain on septic), projects that can be served by an existing septic system with sufficient capacity (e.g., certain ADU situations), properties the sewer utility determines cannot be served, and cases where adjacent property owners refuse necessary sewer easements. - The ordinance will not take effect until Jan. 1, 2027 to provide time for coordination with sewer utilities and ongoing pipeline projects.
Why it matters: Federal Way has roughly 3,450 septic systems — the most of any King County city — many of which predate incorporation and are approaching the end of their useful life. Staff said the amendment is intended to curb new proliferation of septic systems, protect water bodies, and provide clarity for permitting decisions.
Council action: on first reading the council forwarded the Title 18 and Title 19 ordinances to the Nov. 5 meeting for second reading and enactment; first readings passed without recorded opposition.
Implementation notes: staff said the City will coordinate with Lake Haven Water & Sewer District and King County Public Health on notification and implementation details, including how documentation from the county will trigger city action when a septic inspection fails.
Ending: The council advanced the ordinances; staff will work with utilities and the county to finalize the implementation checklist and appeals process mandated by state law.
