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Existing Building Code

See also: Building Code

What Is It?

The Seattle Existing Building Code (SEBC) provides minimum requirements for repair, alteration, change of occupancy, addition, and relocation of existing buildings. Seattle has adopted the 2012 International Existing Building Code, with amendments specific to our city.

What It Isn't

This code does not cover regulations for single-family houses, duplexes, and townhouses with up to three stories and separate entrances. Those regulations are found in the Seattle Residential Code.

Read the Code


2012 Seattle Existing Building Code

This is a read-only version of the 2012 Seattle Existing Building Code. You can buy a full version from

Previous Versions

Purchase Codes

Proposed Changes

We're updating the Seattle Existing Building Code. See our 2015 Seattle Codes Adoption page for our proposed changes.

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