Standard Specifications & Plans
The City of Seattle’s “Plans and Specs,” as they are often called, apply whenever any public or private construction is performed in the City of Seattle’s Right of Way and are referenced in SDOT Street Use Permits. These Construction Standards also serve as the primary contract documents for public works construction contracts for the City of Seattle.
2026 Construction Standards
2026 Standard Specifications (PDF)
The TOC and Section references in the 2026 Standard Specifications have been cross-referenced (linked) to the corresponding section. Once the document has been saved to your computer, you may navigate backwards to your previous Section in the document by pressing the “Alt – Left Arrow” buttons.
2026 Standard Plans (PDF)
(2026 CAD Drawings of Standard Plans will be posted when available)
2026 Redline Markups of Standard Plans (PDF)
The Redline Markups show how the 2023 Standard Plans were changed to create the 2026 edition.
Summary of Edits from 2023 to 2026 edition (PDF)
This table summarizes edits made to the 2023 edition of the Construction Standards to create the 2026 edition of the Construction Standards.
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.
2023 Construction Standards Amendments
Recommended Amendments to the 2023 edition of the Standard Specifications and Standard Plans are provided below (12/31/24).