Concrete Retaining Walls in Bellevue, WA

Retaining walls in Bellevue: what to know

Height starts at the underside of the footing and runs up to the top edge of the wall. Hillside walls in Bellevue often hold back a bank, a driveway, or a neighbor’s grade on their back side, and each of those loads is written down before a design is picked. Walls over 30 inches high must stay out of any required setback, which is why the wall’s position on the lot matters as much as its height.

Drain water collected behind the wall needs a destination on the same lot. The outlet aims at soil that can absorb it, stays clear of the street and neighboring property lines, and is tested for soil before excavation starts. Where the slope behind the wall meets the code’s steep-slope tests, the critical-area rules add a 50-foot top-of-slope buffer and a 75-foot setback from the toe, so the wall’s location is checked against them first.

Permits and rules in Bellevue

Each wall is measured, its loads are grouped, and its position is checked against the setback and critical-area rules before we send a figure. Both the four-foot line and the surcharge trigger are tested for the parcel. We confirm the classification with city staff when a wall sits near a steep slope, and the drain outlet is reviewed in the same pass as the wall.

Bellevue’s permit FAQ requires a permit for a retaining wall over four feet high, counted from the underside of the footing up to the top edge, and for any wall supporting a surcharge load. Walls over 30 inches high must stay out of any required setback. A patio or paver set on grade needs no permit unless the earthwork passes the city’s thresholds, and that exemption does not reach lots inside the Critical Areas Overlay District. The residential right-of-way permit may cover driveway installation and driveway reconstruction or relocation. The city revises these rules, so we confirm the current requirements before work begins.

How we approach it

Start at the footing and read the height to the top edge
List each bank, building, or vehicle that loads the wall
Locate the wall against setbacks and any steep slope first
Choose the drain outlet on the parcel ahead of footing work

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 Bellevue

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

Questions from Bellevue homeowners

Which Bellevue wall height starts the permit question?

Bellevue’s permit page draws the four-foot line and measures it from the footing’s underside up to the wall’s top. Any wall supporting a surcharge load also needs a permit, whatever its height, so a short wall with a loaded bank behind it can still need one.

Does a Bellevue hillside wall need a critical-area check?

It can, when the slope is steep enough. Bellevue’s code defines a steep slope as 40 percent or more with a rise of at least 10 feet and more than 1,000 square feet of area, and sets a 75-foot setback from its toe. A wall on such a slope gets that check before its footing is located.

Where should a Bellevue wall drain discharge?

Onto your own lot, at a point that can absorb the flow and stays off the street and neighboring parcels. Bellevue’s guideline does not set an outlet for footing drains, so we confirm the point with city staff before excavating for footings.