Standard Specifications and Plans
The 2023 Construction Standard Specifications and Standard Plans apply whenever any public or private construction is performed in the City of Seattle’s Right of Way. The Construction Standards also serve as the City’s primary contract documents for administering public works construction contracts.
2023 Construction Standards
2023 Standard Specifications (PDF)
To improve functionality, section references in the 2023 Standard Specifications have been cross-referenced (linked) to the corresponding section. To navigate back in the document, press Alt+(left arrow).
2023 Standard Plans (PDF)
2023 CAD Drawings of Standard Plans
2023 Redline Markups of Standard Plans (PDF)
The Redline Markups show how the 2020 Standard Plans were changed to create the 2023 edition.
Summary of Edits (PDF)
This table summarizes edits made to the 2020 edition of the Construction Standards to create the 2023 edition of the Construction Standards.
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 (PDF)
- 2020 Redline Markups of Revised Standard Plans (PDF)
- 2020 Revised Standard Plans (PDF)
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.)