Tree review (RMC 4-4-130) if regulated trees apply

Renton's tree thresholds (RMC 4-4-130)

Renton's tree rules under RMC 4-4-130 (amended by Ordinance 6160, June 16, 2025) define:

• Significant tree: DBH of at least 6 inches (8 inches for alder or cottonwood).
• Landmark tree: DBH of 24 inches or greater (except Big Leaf Maples, Black Cottonwoods, and Red Alder).

A Routine Vegetation Management Permit (RVMP) is required for:

• Removal of any landmark tree.
• Removal of more than 2 significant trees per year.

Removing up to 2 significant trees per year does not require a permit under certain conditions — confirm the current exception criteria with Renton CED.

How to handle it

For most additions, the designer flags any regulated tree on the survey and produces a tree-protection plan with the permit submittal. Renton CED reviews it as part of the main application.

If a significant tree has to be removed, the path is more involved: documentation of justification, replacement planting per the RMC formula. Removal is rarely worth it on a single-story addition; redesign around the tree if feasible.

When you can skip this concern

A lot with no significant or landmark trees, or where construction activity stays entirely clear of any tree's drip line, passes through tree review without comment.