Environmental Codes

See also: Land Use Code, How to Appeal a Decision, Land Use Opinion Letters, How to Request a Code Interpretation

The City recently adopted ordinances 127211 and 127219 to boost housing supply and options in Seattle’s residential zones. The online Seattle Municipal Code may take several months to be updated. You can download consolidated versions of the Neighborhood Residential Code and the Accessory Dwelling Units for reference.

What Is It?

The City’s environmental codes protect sensitive areas in Seattle, including our shorelines, wetlands and streams, cultural and historic resources, and geologic hazards. These areas require additional rules due to their environmental importance. The City’s environmental codes regulate the design and siting of structures and how land is disturbed during development. These regulations protect ecological functions, environmental resources, and public health and safety, while allowing for reasonable development.