Concrete Retaining Walls in Marysville, WA

Retaining walls in Marysville: what to know

Wall height is taken from the footing’s underside up to the top edge, so the footing depth is recorded on the site plan before the height is read. A surcharge means extra surface loading behind the wall, for example a driveway, a sloped bank, or a structure set close behind it, and a surcharged wall needs a permit even when it stays at four feet or less. The exempted-work handout exempts a retaining wall up to four feet unless it supports a surcharge or holds hazardous liquids, so the two handouts are read together.

A wall above the height trigger needs a design from a professional engineer holding a Washington license, and the handout requires stamped calculations from a structural or geotechnical engineer for either trigger. Drainage behind the wall is drawn on the section with its outlet, so the water does not reach a neighbor’s lot or the road.

Permits and rules in Marysville

We measure each wall from the underside of its footing and classify any surcharge. Before quoting, we check the placement against the city’s wall handout, and permit walls get the stamped calculations the city asks for. We confirm the engineer’s scope with the city before the application goes in. Any footing excavation that reaches the 50-yard grading line is confirmed separately.

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

How we approach it

Measure from the footing underside to the top of the wall
Classify any surcharge, including a bank or a driveway behind
Schedule stamped engineering for any permit wall
Draw grade contours and surface-flow arrows on the site plan

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 Marysville

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

Questions from Marysville homeowners

Do Marysville’s two wall handouts agree on the four-foot line?

No, not fully. The exempted-work handout exempts walls up to four feet unless they carry a surcharge or hazardous liquids. The fences and retaining walls handout sets the permit trigger at walls taller than four feet and at surcharged walls, and it does not state that exemption. The permit table lists no retaining-wall permit, so the department confirms the answer for each wall.

Would a driveway behind a Marysville wall trigger the surcharge rule?

It can. A driveway adds surface loading behind the wall, and a wall holding back a surcharge needs a permit even when it is under four feet.

Which engineer stamps a Marysville wall that needs a permit?

The handout requires stamped calculations from a structural or geotechnical engineer, and a design above the height trigger comes from an engineer holding a Washington license. We arrange that work before the estimate is final.