Zoning, building permits and septic rules in Federal Way, Washington

Federal Way’s own rules

• Building permitRequired

  Residential and commercial lot improvements inside Federal Way city limits.

  • Some residential and commercial work is exempt from the building-permit process.

  “Virtually every improvement on a residential or commercial lot requires a permit. Some work is exempt from the building permit process”

• Building code adoptedAdopted (with conditions)

  ICC-governed permit applications inside Federal Way city limits.

  • Applications deemed complete after March 15, 2024 use the 2021 edition as amended by Washington and the City; applications submitted before that date and subsequent revisions use the 2018 edition as amended.

  2021 code applicability date: > 2024-03-15 (Applications submitted before this date and subsequent revisions are reviewed under the 2018 edition.)

  “Permit applications which are governed by the ICC codes, and which are deemed complete after March 15, 2024, shall meet the minimum criteria of the 2021 code edition as amended by the State of Washington and the City of Federal Way.”

• Local zoningPresent (with conditions)

  Land inside Federal Way city limits.

  • The City administers zoning through its Planning Division and Federal Way Revised Code.

  “Administration of zoning, subdivision, shoreline, environmental, and critical area codes”

• Zoning districtsPublished (with conditions)

  Zoning districts inside Federal Way city limits.

  • The Planning Division maintains the Federal Way Zoning Map and processes code amendments.

  “Zoning (36" x 48" | Citywide zoning classifications and parcels)”

• Subdividing landRegulated (with conditions)

  Land subdivision inside Federal Way city limits.

  • Planning Division application, review, issuance, and inspection processes apply.

  “Application, review, issuance, and inspection of land use, environmental, critical area, and subdivision permits”

• Driveway accessRequired

  Replacement or modification of a driveway within City right-of-way inside Federal Way city limits.

  • Requirement applies to private or residential use of City right-of-way; it does not establish a permit rule for driveway work entirely outside right-of-way.

  “Any private or residential use of Right of Way including: replacement or modifications to driveways, any sidewalk repairs, and installation of irrigation systems.”

• Permit processPublished (with conditions)

  Permit applications requiring City review inside Federal Way city limits.

  • Applicants must first request a document-upload link; the City states the link can take a few days to process.

  “All applications that require review must be submitted electronically. To apply, first request a Document Upload Link. We will then set up a file for your project and send you a link for submitting your application materials.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Federal Way or King County directly.

• Owner-builder exemption — Owner-built residential construction inside Federal Way city limits.
• Certificate of occupancy — Occupancy of buildings inside Federal Way city limits.
• Minimum dwelling size — Federal Way residential zoning districts.
• Minimum lot size — Federal Way residential zoning districts.
• Setbacks — Federal Way residential zoning districts.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Off-grid gear

Going off-grid in Federal Way means bringing your own water and power. The kit we’d start with:

• Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
• Power Bluetti Solar generators and home battery backup for living off the grid.
• Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
• Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.

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