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)

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 tab.)

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