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Tree Protection Code

What Is It?

Our Seattle Municipal Code (SMC) limits the number and the size of trees that may be removed from your property. We also have restrictions on when you can remove shrubs and other vegetation.

Our tree codes have a wide range of limits, based on the specific conditions on your property. We highly recommend hiring an arborist or attending a coaching session to learn the specific rules for your property.

In general, the following rules apply when removing trees or vegetation.

Environmentally critical areas. You cannot remove any trees or vegetation from environmentally critical areas, such as steep slopes, wildlife habitat, and wetlands, without a Tree Removal and Vegetation Restoration approval.

Undeveloped land. You cannot remove any tree 6 inches or greater in diameter, unless the tree is designated as hazardous. You must get a hazard tree assessment by a certified tree risk professional.

Developed property.

  • You cannot remove any exceptional trees. Exceptional trees are trees that are of significant size or have historical, ecological or aesthetic value.
  • You cannot cut down more than 3 non-exceptional trees 6 inches or greater in diameter each year.
  • You can remove trees determined to be hazardous through a hazard tree assessment by a certified tree risk professional.

Developing property. If you are developing your property, you may have more flexibility to remove trees if they prevent you from using your property. We will review your tree and vegetation plans as part of your permit application. Depending on your project, you may be required to retain landscaping or use the Green Factor.

Read the Department of Natural Resources' Tree Protection on Construction and Development Sites for a good overview of tree care and protection measures. Some details and requirements are different from ours. In those few situations, you need to follow Seattle DCI's tree protection rules.

Read the Code

For more information on existing regulations, read:

Proposed Changes


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