Poured Concrete Retaining Walls in Fairfax, VA

When the Wall Has to Be the Strongest Thing on the Property

Poured concrete retaining walls are steel-reinforced concrete, formed and poured on site — one continuous structural unit from footing to cap. They are the strongest retaining wall type we build, and the right choice when the wall is tall, when it carries a load like a driveway or structure above it, or when an engineer specifies concrete.

When Concrete Is the Right Call

• Tall walls. Above five or six feet, concrete with engineering is usually the most economical strong option.
• Loaded walls. A wall holding up a driveway, a parking pad, or a structure needs the strength only reinforced concrete (or engineered masonry) provides.
• Tight spaces. Concrete walls can be thinner than block walls of equal strength — useful when every inch of yard matters.
• Modern looks. A smooth architectural concrete face suits contemporary homes. It can also be stained, or faced with stone veneer for a traditional look.

How We Build Them

Every poured wall starts with engineering when the height or loading requires it — and in Fairfax County, walls four feet and taller generally do. We excavate to undisturbed soil below the frost line, form and pour a reinforced footing, then set wall forms with steel rebar tied to the engineer's schedule. Weep holes or a full drain system go in before the pour — drainage in concrete is planned, not added later. After curing, we waterproof the back face, place drainage stone and pipe, and backfill in compacted lifts.

Anatomy of a Poured Wall

Understanding the parts helps you judge any contractor's plan:

• Footing. A wide reinforced concrete base, poured below the frost line, that spreads the wall's weight and resists overturning. The footing is typically wider than the wall is thick — that width is the leverage that keeps the wall upright.
• Stem. The vertical wall itself, reinforced with vertical and horizontal steel tied to a schedule the engineer specifies. Thicker at the base, sometimes tapering toward the top.
• Key or stem dowels. Steel tying the stem to the footing so the two pour as one structural unit, not two stacked pieces.
• Weep holes and drains. Planned penetrations and the perforated pipe system behind the wall. In concrete, drainage is formed in — you cannot easily add it later.
• Waterproofing. A membrane on the soil side of the stem, protecting the concrete from constant moisture and freeze-thaw damage.

Finishes: Concrete Does Not Have to Look Industrial

The most common objection to concrete walls is looks — and it is outdated. Options include smooth architectural formwork with crisp lines, board-formed texture that imprints wood grain, integral color mixed through the concrete, stains and dyes applied after curing, and natural stone veneer adhered to the face. A veneered concrete wall gives you the stone look with engineered concrete strength behind it — the best of both for tall or loaded walls where appearance matters.

Engineering: What It Actually Involves

For walls at the permit threshold, a licensed engineer produces stamped plans: soil pressure calculations (using saturated soil values for our clay, not optimistic dry numbers), footing sizing, steel schedules, drainage details, and sometimes a geotechnical report for difficult sites. Fairfax County reviews the plans, inspects the footing before the pour and the finished wall, and signs off. This process typically adds weeks up front — we start it early so it does not stall your project. Our permit guide walks through the thresholds.

Concrete vs. Reinforced Block (CMU)

Both are engineered, reinforced options for demanding sites. Poured concrete can be thinner for equal strength — useful when the site is tight. CMU takes stone veneer and stucco finishes naturally and can be more practical where forming a poured wall is difficult. The engineer picks based on your site's loads, soils, and geometry. Compare our concrete block wall page for the full picture.

Our Process: How Your Concrete Wall Gets Built

Here is what to expect, step by step:

1. Site visit and assessment. We evaluate the slope, the loads (driveway? structure? surcharge slope above?), soil conditions, and access. Tall and loaded sites may need a geotechnical look before design.
2. Engineering and written quote. We coordinate the licensed engineer, then quote the full project: engineering, permits, excavation, forming, steel, concrete, drainage, waterproofing, backfill, and finish.
3. Permits. Stamped plans go to Fairfax County. We track the review and respond to any comments — you do not chase paperwork.
4. Excavation and footing. Dug below the frost line to undisturbed soil, formed, steel tied, inspected by the county, then poured.
5. Stem forming and pour. Wall forms set, steel tied to the engineer's schedule, weep and drain details placed, concrete poured and cured properly — not rushed.
6. Waterproofing, drainage, backfill. Membrane on the soil face, drainage stone and perforated pipe, backfill compacted in lifts.
7. Finish and walkthrough. Veneer, stain, or architectural finish applied; site graded and cleaned; final county inspection; then our walkthrough with you.

What They Cost

Poured concrete walls typically run $9,000 to $22,000 for residential projects in our area, with engineering and forming driving the upper end. They cost more than block because forming, steel, and engineering are real line items — but for tall or loaded walls, nothing else does the job as reliably. See our cost guide.

Talk to us about your tall or loaded slope — free site visit and written estimate.