Standard Specifications and Plans
2020 Standard Specifications for Municipal Construction
Full version of the 2020 Standard Specifications (pdf)
To improve functionality, section references in the 2020 Standard Specifications have been cross-referenced (linked) to the corresponding section. To navigate back in the document, press Alt+(left arrow).
2020 Standard Plans for Municipal Construction
Full version of 2020 Standard Plans (pdf)
2020 Amendments
A new set of recommended amendments to the 2020 edition of the Standard Specifications and Standard Plans was posted on 11/03/2021.
- 2020 Edition Amendment Summary
- 2020 Redline Markups of Revised Standard Plans
- 2020 Revised Standard Plans
Older Amendment Information
Redline Markups (pdf) - Revisions to the 2017 edition as published in the 2020 hard copy edition. (Additional recommended revisions to the Standard Plans 2020 edition may be found under the Amendments section.)
- 2017 Amendment Edition Summary (pdf)
- 2017 Revised Standard Plans (pdf)
- 2017 Revised Standard Plans with Redline Markups (pdf)
- 2017 Revised Standard Plan CAD Files (zip)
Contact the Standards Engineer
If you have any questions, or if you would like to submit a comment for consideration, please contact the City of Seattle's Construction Standards Engineer at City_Standards_Engineer@Seattle.gov.