Holding Portland Slopes with Poured Concrete Retaining Walls
When a yard drops off steeply or a driveway cuts into a slope, a poured concrete retaining wall anchors the grade change. Portland Concrete designs each wall to the height and soil, pours it with reinforcement and a footing set below the frost line, and installs drainage behind it so water pressure never builds. The result is a wall that stays plumb and dry for decades. Free written estimate.
Three things break retaining walls: no engineering (wrong size for the load), no drainage (water pressure pushes it over), and shallow footings (frost heave lifts it). A poured concrete wall built to spec avoids all three by design. The engineer sizes it, the drainage system manages water, and the footing goes deep enough to stay put through Portland winters.
Poured walls excel for tall walls, long runs, and situations where a driveway or structure sits above the wall. The single continuous face also reads cleaner than stacked block. For modest grade changes on a tight budget, a block retaining wall can make sense; we assess your site and recommend the right choice.
Poured walls often pair with walkout basement projects where the wall holds the excavated cut, or with concrete staircase work that cuts through a slope needing support on both sides.
Recent work
The sequence
How Poured Retaining Walls Get Built in Portland
Engineer the wall to load
An engineer designs the wall to the slope height, soil type, surcharge load (anything sitting above it), and freeze-thaw cycle, sizing the footing, wall thickness and reinforcement to the project.
Dig footing below frost
The wall footing is excavated below the frost line, formed and poured first with the engineered dimensions and reinforcement, so the wall sits on a base that will not lift in winter.
Form, reinforce, pour wall
The wall is formed straight and true, reinforcement tied through the full height with proper laps and the keyway to the footing, and the wall is poured and consolidated in one continuous lift where possible.
Drain behind, backfill
Drainage stone is placed against the back of the wall, a drainage pipe collects water at the footing and routes it to daylight or the property drainage, then the cut is backfilled to grade with confirmed drainage path intact.
The critical detail
Why Drainage Determines Wall Lifespan
Water trapped behind a retaining wall multiplies the soil load by a factor that even heavy reinforcement cannot overcome. Most failed walls would still be standing if drainage had been installed and maintained. That is why every retaining wall we build starts with a drainage conversation, not a concrete conversation.
Our standard is drainage stone against the back face and a drainage pipe at the footing routed to daylight or the property storm system. This small addition to the cost is the difference between a wall that lasts decades and one that fails in a few years. The same drainage-first approach applies across all residential concrete work, from foundation work to basement projects.
Engineering, drainage, footings below frost and when poured beats block for residential walls.
For most residential poured walls over a couple of feet tall, yes. Engineering sizes the footing, wall thickness, reinforcement and drainage to the load and soil. The cost of design is small compared to the cost of a wall that fails. We work from engineered drawings on every project.
Poured is best for taller walls, longer continuous walls, structural loads above the wall, and a single clean face. Block is best for shorter walls, less structural load and a more economical install. We will recommend based on your project.
Critical. Most failed retaining walls failed from trapped water pressure, not from undersized concrete. Drainage stone against the back and a drainage pipe at the footing routed to daylight are what keep the wall standing for the long run.
Below the frost line, which is typically several feet in Portland. The engineer confirms the exact depth based on the soil and load; the wall footing will go deeper than your eye says it needs to, and that depth is what stops winter heave.
A few weeks for a typical residential wall, including engineering, excavation, footing pour with cure, wall pour with cure, drainage install and backfill. The full schedule is in the written quote so you can plan around it.
Homeowner reviews
What Portland Homeowners Say About Their Poured Retaining Walls
Engineered, drained, footing below frost. Wall is plumb to within a fraction, drainage is dry behind it. Worth doing once and properly; the yard finally makes sense.
Q. F.
Portland
★★★★★
Holding back the cut for our walkout basement and the driveway above it. Single continuous face, no joint pattern to weather. Looks like part of the architecture.
X. W.
Vancouver
★★★★★
Drainage was their first conversation, not the concrete. Got the why right; the wall is dry behind, stable in front, and stayed that way through spring melt.
Z. W.
Hillsboro
★★★★★
Engineer worked directly with the crew. Calcs to drawings to pour, nothing got fudged. The wall is bombproof and the budget held to the dollar.
Y. W.
Gresham
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