Submit a Plat for Street Layout Approval - Seattle

Land Use and Zoning Washington 3 Minutes Read ยท published February 07, 2026 Flag of Washington

Overview

Seattle, Washington requires that new plats and subdivisions affecting street layout comply with city land use and street-use rules before recording or construction begins. The Department of Construction & Inspections (SDCI) handles land use review for plats while Seattle Department of Transportation (SDOT) reviews street layout and rights-of-way conditions; see official guidance for applications and technical requirements [1][2].

Process

Typical stages include pre-application consultation, formal submission of plat documents, coordinated review by SDCI and SDOT, public notice or comment where required, conditions of approval, and final plat recording. Timelines and required materials vary by project size and complexity; precise requirements are listed on the relevant agency pages [1][2][3].

  • Pre-application meeting with SDCI and SDOT to identify key issues.
  • Prepare plat map, legal descriptions, engineering plans and environmental or stormwater documents.
  • Submit formal application to SDCI; SDOT concurrently reviews street alignment, access, and improvements.
  • Address agency conditions, obtain approvals, then record the final plat with King County if required.

Penalties & Enforcement

Enforcement is carried out by city departments responsible for the subject matter: SDCI enforces land use and platting requirements; SDOT enforces street-use and public-right-of-way standards. Specific monetary fines and daily penalties for plat or street-layout violations are not provided on the cited agency pages and therefore are not specified on the cited page. For controlling legal provisions consult the municipal code and agency enforcement pages [3][1].

  • Monetary fines: not specified on the cited page.
  • Escalation for repeat or continuing offences: not specified on the cited page.
  • Non-monetary sanctions: stop-work orders, orders to correct work, withholding of permits, or referral to enforcement proceedings or court actions.
  • Enforcers and inspections: SDCI for platting/land-use compliance; SDOT for street-use and right-of-way compliance. Use the agency contact pages to file complaints or request inspections.
  • Appeals and review: administrative appeals are handled according to the procedures in the municipal code and agency rules; specific time limits for filing appeals are not specified on the cited page.
If you discover unpermitted street work, contact SDOT and SDCI immediately to avoid escalation.

Applications & Forms

Required application forms, submittal checklists, and fee schedules are published by SDCI and by SDOT where street work is involved. Exact form names and numbers, current fees, and submission portals are listed on the agencies' official pages; if a specific form number or fee is not shown on those pages it is not specified on the cited page [1][2].

  • Pre-application checklist and meeting request: see SDCI guidance and the SDCI intake process.
  • Application fees and deposit information: see the SDCI fee schedule on the official site.
  • Submission method: electronic submittal via SDCI portals or as instructed on the agency pages.
Prepare required engineering and survey documents before submission to reduce delays.

How-To

  1. Schedule a pre-application meeting with SDCI and request SDOT coordination.
  2. Assemble plat map, legal descriptions, grading and drainage plans, and any environmental studies required by the agencies.
  3. Submit the formal plat application with all exhibits and pay applicable fees.
  4. Respond to agency review comments; obtain approvals and any required street-use permits from SDOT.
  5. Record the final plat with King County and proceed with construction under issued permits.

FAQ

What is a plat and when is it required?
A plat is a recorded map of a subdivision showing lots, streets, and easements; plats are required when dividing land into new lots or when changes to public rights-of-way are part of a subdivision.
How long does street layout approval take?
Timelines vary by project complexity and agency workload; a definitive processing time is not specified on the cited pages and will be provided by SDCI/SDOT during the pre-application process.
Can I build while a plat application is pending?
Construction affecting public rights-of-way or requiring permits should not proceed until required approvals and permits are issued; unpermitted work may lead to stop-work orders and enforcement.

Key Takeaways

  • Coordinate early with SDCI and SDOT to identify street-design and platting issues.
  • Bring complete engineering, survey, and drainage documents to avoid review delays.
  • Final plat recording and street permits are required before constructing street improvements.

Help and Support / Resources

  1. [1] City of Seattle - SDCI plats and subdivisions
  2. [2] City of Seattle - SDOT street-use and permits
  3. [3] Seattle Municipal Code Title 23 - Land Use

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