Concrete Retaining Walls in Bothell, WA

Retaining walls in Bothell: what to know

For the permit line, height runs from the footing’s underside to the wall’s top edge, because the building exemption list uses that measure. The handout does not state a height measure, and the city code measures retaining-structure height from the city-approved finish grade for its own height rules. We confirm which measure governs each wall before the design is drawn.

Added loads get the same care: fill or a slope behind the wall, a driveway or structure nearby, or any other extra weight. The handout does not define surcharge, so we treat added load from fill, a slope, or a structure as one for review. Each load is noted with its distance from the wall face. A wall above four feet goes to permit whether or not a load is present.

Permits and rules in Bothell

A wall past four feet is taken to permit on the route we select. A lower wall bearing a surcharge follows that same route. Before quoting, we check a shorter wall with no surcharge against the exemption list, including its liquid condition, and we ask staff about the drainage and setback points the handout does not state.

Rules change and vary by parcel, so we confirm the current requirements with the city before we start.

How we approach it

Choose the design route before layout
Measure height from footing bottom to wall top
Note each surcharge and its distance from the face
Ask staff for drainage and setback points

For the full process, see our Retaining Walls page.

Building in the cold months? See our guide to winter concrete pours.

Our retaining walls work, serving Bothell

Examples of our work. We build retaining walls in Bothell and the cities around it. See all of our work

Questions from Bothell homeowners

Which Bothell walls require a permit, and at what height?

Walls four feet or less can be exempt when no surcharge bears on them and no Class I liquid, Class II liquid, or Class III-A liquid is impounded behind them, with height read from the footing’s underside. Anything taller than four feet goes to permit under the city’s handout, and we line up the design route with the wall height in view.

Can a slope above a Bothell wall change its permit status?

Potentially. The handout does not define a surcharge, so added load from a slope, a structure, or fill behind the wall is treated as one for review, and a wall at four feet or lower with a surcharge needs a permit.

Do Bothell retaining walls need engineered plans?

Not in every case. The handout offers the standard rockery detail, a prescriptive IRC or IBC route, or a design stamped by an engineer or architect. We choose the route with the wall height and loads in view, and we line up stamped work when the chosen route calls for it.