Retaining Walls: Bellevue vs Redmond
How do retaining walls rules compare between Bellevue, WA and Redmond, WA?
Bellevue and Redmond have similar restriction levels.
Bellevue, WA
King County
Bellevue requires building permits for retaining walls over 4 feet measured from bottom of footing; walls in critical areas need geotechnical review regardless of height.
View full Bellevue rules →Redmond, WA
King County
Retaining walls over 4 feet tall (measured from footing bottom to wall top) or supporting a surcharge require a building permit and engineered design in Redmond under IBC and RMC 15.06.
View full Redmond rules →Key Facts Comparison
| Fact | Bellevue | Redmond |
|---|---|---|
| - | - | |
| Permit Trigger | - | Over 4 ft from footing |
| Engineering | - | WA-licensed engineer |
| Critical Area | - | Extra environmental review |
| Code | - | RMC 15.06 / IBC |
Highlighted rows indicate differences between cities.
Bellevue FAQ
Redmond FAQ
Do I need a permit for a 3-foot landscape wall?
Typically no, as long as it is not supporting a surcharge and is outside a critical area. Decorative stacked block under 3 feet is usually exempt.
What engineer do I need for a tall retaining wall?
A Washington-licensed civil or structural engineer must stamp plans for any wall over 4 feet from footing bottom to top of wall.
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