Services

    Retaining Walls

    Retaining walls built correctly — block, boulder, or timber — with drainage behind them and a base that holds up to Eastside clay soil and slope.

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    Built to hold.

    A retaining wall is a structural element, not a landscaping accessory. On the Eastside, where clay soil holds water and hillside lots carry real grade, a wall that isn't tied back, drained, and built on the right base will fail. We build them correctly the first time.

    Block, natural boulder, timber, or poured concrete — each material behaves differently and suits different lots. We help you choose based on what the wall actually needs to do, not just what looks good in a catalog. Every wall we build includes drainage behind it so water pressure never builds up and blows the face off.

    Typical Project Ranges

    Under 4 Feet — No Permit Required
    $45 - $90 / face ft

    Retaining walls under 4 feet generally don't require a permit on the Eastside. Block, boulder, or timber, built correctly and tied back properly. Cost is driven by linear footage, material, and access.

    4 Feet & Over — Engineered & Permitted
    $90 - $150+ / face ft

    Walls at or above 4 feet require an engineered design and building permit. This adds engineering fees, permit fees, and weeks to months to the timeline. Budget and schedule accordingly before committing to a project start date.

    The 4-Foot Rule: The single biggest cost inflection point on any retaining wall. Under 4 feet: no permit, standard build, standard timeline. At or over 4 feet: engineered design, permit, longer timeline, higher total cost. Know your height before you plan.

    What drives the price

    • Height & permit thresholdThe 4-foot rule is the single biggest cost inflection point. Under 4 feet: no permit, standard build, standard timeline. At or over 4 feet: engineered design required, permit required, longer timeline, higher total cost. Know your height before you plan.
    • Site accessThis is the biggest variable on many Eastside lots. A wall on a steep hillside with no equipment access means every block, every bag of concrete, and every tool is carried in by hand. That labor cost is real and significant. We price access honestly.
    • MaterialConcrete block (standard), natural boulder, timber, and poured concrete are the common options. Natural boulder looks the most native to this landscape but is priced by the ton and requires equipment to place. Material choice changes both the look and the price.
    • Wall length & configurationA single straight wall is the most efficient. L-shaped or tiered walls add complexity and cost. Longer runs get slightly more efficient on a per-linear-foot basis.
    • Drainage behind the wallA correctly built retaining wall includes drainage behind it — perforated pipe, gravel backfill — so water pressure doesn't build and blow the wall out. If someone bids a wall without specifying wall drainage, ask about it.
    • Soil conditionsEastside clay holds water. More water pressure behind a wall means more structural demand. Clay conditions are the baseline assumption in our bids.