Retaining Wall Construction in Gaston, OR
Gaston's sloped lots and Oregon clay soil make retaining walls more than a nice-to-have — they're what keep your hillside from sliding into your patio. We build retaining walls that actually hold back earth, with proper drainage, base, and footing so they stay straight for decades instead of bowing after one wet winter.
Serving Gaston and the Portland Metro Area, OR · 10% off your next job.

Retaining walls are one of the most common hardscape builds in Gaston and across the Portland Metro Area, and for good reason — Oregon's slopes, clay soil, and wet winters make a wall the difference between a usable, level yard and a hillside that washes away with every rain. But a retaining wall is only as good as what's under it and behind it. We build walls that actually hold back earth: a compacted crushed-rock base dug to firm ground, block or stone set plumb and level, and gravel backfill with a drainage path so hydrostatic pressure never builds up against it.
We've built retaining walls across the Portland Metro Area since 1998 — more than 25 years — so we know what the area's clay soil and slopes do to a wall that's built wrong. The number-one reason walls fail here is water building up behind them with nowhere to go — which is why every wall we build gets clean gravel backfill and a drainage outlet. That's the part most crews shortcut, and it's the part that decides whether your wall lasts five years or fifty.
Retaining walls range from short garden-bed walls that tidy up a planting area to taller walls that carve a level lawn or patio out of a slope. We build in segmental block for most structural walls — interlocking, strong, and clean-faced — and natural stone or pressure-treated timber where the look or budget calls for it. We help you pick the material that lasts and matches the house, and we tell you up front what the whole build costs — base, drainage, materials, and haul-off.
A lot of our work is replacing walls that another crew built without drainage, and that are now bowing or leaning. We tear them out and rebuild them right — base, compaction, drainage, and all — so you're not back here in five years looking at the same problem on a bigger lot. Whether you need a new wall to create level space out of a slope or a failing wall rebuilt the right way, we handle it from estimate to finished grade.
Slope & Soil Problems We Solve with Retaining Walls
Slope erosion and washout
Oregon rain on a bare slope strips topsoil fast. A wall holds the grade and stops the runoff.
Unusable sloped yards
We terrace with walls to turn a hillside into level, usable lawn or garden space.
Clay soil heaving
We build the base and drainage right so freeze-thaw and wet clay don't push the wall over.
Old walls that are bowing
We replace failing walls and rebuild them the right way — drainage, base, and all.
Why Choose Metro Mowing for Retaining Walls
Built to hold, not just to look good
Proper base, compaction, and drainage behind the wall — the things that decide whether it lasts 5 years or 50.
Local soil experience
We know Gaston's clay and the Portland Metro's sloped lots. We design for what's actually under your wall.
Material that fits your property
Segmental block, natural stone, or timber — we help you pick what lasts and what matches the house.
Clear, written estimates
You see the full price — base, drainage, materials, haul-off — before we start. No extras after.
Our Retaining Wall Build Process
Site visit & estimate
We measure the slope, check the soil, and give you a written price for the wall, drainage, and materials.
Excavate & base
We dig to firm ground and lay a compacted base — the part that decides whether the wall holds.
Build with drainage
We set block or stone, plumb and level, with gravel backfill and drainage so water doesn't build up behind it.
Finish & grade
We cap the wall, grade the soil above and below, and clean up the site.
Materials & Methods
We build with segmental retaining-wall block for most structural walls — interlocking, strong, and clean-faced. For lower walls and garden beds we also use natural stone and pressure-treated timber. Behind every wall goes clean gravel backfill and a drainage path so hydrostatic pressure never builds up against it.
- Segmental block, natural stone, or timber
- Compacted crushed-rock base
- Gravel backfill with drainage outlet
- Level, set, and capped to spec
Residential & Commercial / Agricultural
Residential
Terraced yards, garden-bed walls, and slope stabilization for homes in Gaston, Hillsboro, Forest Grove, and the sloped lots across the Portland Metro Area.
Commercial & Agricultural
Retaining walls for property entrances, parking edges, and landscaped berms at businesses and HOAs that need engineered-looking results without the big-firm price.
Recent Retaining Walls Projects



What Gaston & Portland Metro Clients Say
Sample reviews shown — replace with your verified Google reviews.
"Nicolas and his crew have mowed our five acres for two seasons now. Always on time, always clean-cut, and the field looks better than it ever has. Glad we found them."
"They rebuilt our sloped backyard with a retaining wall and new paver patio. The drainage work they did saved our basement. Professional from quote to finish."
"Our HOA hired Metro Mowing for the common areas. Communication is clear, the lawns are sharp every week, and they handle the big field mowing too. Highly recommend."
Sample customer feedback — replaced with real Google reviews.
Talk to a Local Contractor
Free estimates and fast response — Since 1998 experience.
Retaining Walls in Cities Across the Portland Metro Area
See how we deliver retaining walls in your city. Click any link for local details, pricing, and a free estimate.
Retaining Walls Across the Portland Metro Area
We bring our retaining walls services to homeowners, farms, and businesses across Gaston and the Portland Metro Area, OR. Find your city below.
Retaining Walls in Gaston — Common Questions
Questions about our retaining walls work in Gaston and the Portland Metro Area, OR.
Do I need a permit for a retaining wall in Gaston?
Taller walls (typically over 4 feet) often require a permit. We handle or advise on permits as part of the estimate — we'll tell you up front what your project needs.
How tall can you build a retaining wall?
We build walls from a foot or two up to taller engineered walls. For very tall walls we may bring in engineering — we'll tell you at the estimate.
What material lasts longest?
Segmental block on a proper base with drainage lasts decades. Timber is more economical but shorter-lived. We'll recommend the right material for your height, soil, and budget.
Why is drainage behind the wall so important?
In Oregon, water building up behind a wall is the #1 reason walls bow and fail. We install gravel backfill and drainage so pressure never builds.
Do you offer a warranty on walls?
We stand behind our workmanship. Talk to us about your specific project and we'll be clear about what's covered.
Other Services We Offer
Get Pricing for Your Retaining Walls Project
Call a local landscaper — Since 1998. Free estimates, fast response, and 10% off your next job.
Or send us a message — we respond same day.

Lawn Mowing
Yard & Garden Maintenance
Tree Cutting & Trimming
Wood Fences