Poured Concrete Wall Cost Calculator

A poured (cast-in-place) concrete wall typically costs $25 to $60+ per square foot of wall face installed, so most projects run $3,000 to $15,000 — a small wall might be $2,000 to $5,000, while a large foundation, basement, or tall retaining wall can exceed $15,000 to $30,000+. On a linear-foot basis, poured walls commonly run $50 to $200+ per linear foot depending on height and thickness. A 200 sq ft, 8-inch wall with standard rebar and a basic finish lands near $7,600 in this calculator. Cost is driven by the wall face area (length × height), the thickness (6-inch is cheapest, 8-inch is the common foundation choice, 10-inch+ for heavy/retaining walls is priciest), the reinforcement, and the finish/access. Add-ons like excavation, a footing, waterproofing/drainage, a decorative finish, engineered rebar, and a concrete pump add to the total. A ~$1,500 job minimum applies. Enter your wall area and thickness above for a localized estimate.

They're the two main types of concrete wall, differing in method, strength, and water resistance. A poured (cast-in-place) wall is built by erecting formwork, placing rebar, and pouring concrete into the forms; once cured, the forms come off, leaving a solid, monolithic (one-piece) wall with no joints. A block wall (CMU) is built by stacking concrete blocks bonded with mortar, with cores often reinforced with rebar and grout. Poured walls are generally stronger and more water-resistant because they're monolithic — no mortar joints, which are the weak points and water-entry paths in block walls — so poured is often preferred for foundations, basements, and retaining walls that resist soil and water pressure below grade. Block is flexible and can be built incrementally without forms or a large pour, which suits many wall types. Cost is comparable and varies by project: poured can cost more on small jobs (forming and concrete delivery) but is efficient for long continuous walls. This calculator prices poured concrete walls; a separate one covers block walls.

Poured concrete walls are used wherever a strong, durable, monolithic wall is needed — most commonly foundation walls, basement walls, and retaining walls, plus crawl space and stem walls, structural/load-bearing walls, shear walls, pool walls, and site walls. Foundation and basement walls are a top use because poured concrete resists the lateral soil and water pressure on below-grade walls and, being monolithic with no joints, is more water-resistant than block — important for keeping basements dry. Retaining walls are another major use: poured concrete is strong enough to hold back significant soil pressure on a slope, given proper engineering, a footing, and drainage. Because poured walls are strong, durable, fire-resistant, pest- and rot-proof, and good at resisting lateral pressure, they suit structural, load-bearing, below-grade, and earth-retaining applications. The application determines the thickness, reinforcement, and engineering — which is why this calculator lets you set thickness and reinforcement for anything from a light standard wall to a heavy structural or retaining wall.

Yes — most structural, foundation, basement, and retaining walls need both a footing and rebar, and they're essential for strength and stability. The footing is a wider concrete base poured first (typically wider than the wall and below the frost line for foundations) that spreads the wall's load over more soil to prevent settling; the wall is then poured on top. Reinforcement matters because concrete is strong in compression but weak in tension: rebar adds the tensile strength a wall needs to resist bending and the lateral pressure from soil, water, and backfill — without adequate rebar, a wall can crack, lean, or fail, especially a retaining or foundation wall under pressure. The size, spacing, and depth of the footing and rebar are set by the wall's height, the loads, the soil, and local code, and significant or tall retaining walls should be engineered. This calculator includes footing, engineered-rebar, and reinforcement options; on any structural wall, the footing and rebar aren't the place to cut corners.

They're highly water-resistant — more so than block walls, because they're monolithic with no mortar joints to let water through — but concrete itself isn't fully waterproof. Concrete is porous, with tiny pores and capillaries that can let moisture slowly wick through, especially under hydrostatic pressure (groundwater pressing against a below-grade wall) or through any cracks that develop from settling or shrinkage. So for below-grade walls (basements, foundations) where staying dry is critical, poured concrete is paired with waterproofing and drainage: an exterior waterproofing membrane or coating to block penetration, footing drains and drainage board to relieve water pressure and channel water away, gravel backfill, and grading that slopes the ground away from the wall. Together, the monolithic wall plus waterproofing plus drainage keep below-grade spaces dry. Above-grade walls often don't need the full system. Don't rely on the concrete alone below grade — this calculator includes a waterproofing/drainage add-on for exactly that reason.

The overall process is usually about 1 to 2 weeks, with the concrete curing being the main built-in wait. The steps: excavation and site prep (a day or more if a foundation, basement, or retaining wall needs digging), pouring the footing and letting it cure before the wall goes on, erecting the formwork (a day to several days depending on size and forming system), placing the rebar, and then the actual pour — which is quick, often just hours, sometimes with a pump for access. After the pour, the concrete sets within a day and forms can usually come off in 1–3 days, but the wall shouldn't be loaded or backfilled until it's cured enough — often 7 days or more per the engineer or code — and it reaches full strength around 28 days. Form removal, finishing, waterproofing, and backfilling with drainage follow. Larger or taller walls, hard access, complex shapes, required inspections (footing, rebar, pre-pour), and cold or wet weather all extend the timeline. The pour is fast; the forming, rebar, and curing are what make it a 1–2 week project.

Thickness is driven by the wall's purpose, height, and the loads or soil pressure it must resist — and it's the biggest per-foot cost factor because a thicker wall means more concrete and forming. A 6-inch wall (~$30/sq ft) is the economical choice for lighter, non-load-bearing, or shorter walls. An 8-inch wall (~$38/sq ft) is the common standard for residential foundation and basement walls and most structural applications. A 10-inch-or-thicker wall (~$48/sq ft) is used for heavy, tall, or retaining applications that resist significant loads or soil pressure — taller retaining walls and deep basement walls especially. The right thickness (and the matching reinforcement) is set by code and, for significant or retaining walls, by a structural engineer based on the height, the loads, and the soil. Don't guess on a structural wall: undersizing the thickness or rebar risks cracking or failure, while an engineered spec ensures it's adequate. Use this calculator's thickness and reinforcement options to compare, then confirm the spec with your engineer or building department.

Usually yes for anything structural. Foundation, basement, and retaining walls are structural elements that affect safety, so most jurisdictions require a permit and inspections, and significant or tall retaining walls typically require engineered, stamped plans proving the footing, thickness, and reinforcement are adequate for the loads and soil. The permit process checks the footing depth and size, the rebar, the concrete spec, and (for retaining/below-grade walls) the drainage and waterproofing, with inspections at key stages like the footing and pre-pour. Retaining walls above a certain height (often around 4 feet, but it varies locally) almost always need engineering. Skipping required permits and engineering risks fines, being ordered to redo non-compliant work, failure under load, and problems selling the home or getting insurance. A reputable concrete contractor handles the permit and engineering as part of the job — this calculator includes an engineered-rebar add-on, and you should confirm your local requirements before building.