CornerStone® Retaining Wall – Strong, Clean, and Built to Fit Any Yard
Got a slope you need to tame? Want to build a raised garden or keep that hill from sliding into your patio? CornerStone® might be just the thing you’re looking for. It’s a heavy-duty retaining wall system we love to use for both residential backyards and large-scale commercial jobs—because it’s reliable, flexible, and good-lookin’ to boot.
At Lee’s General Landscaping, we’ve installed all kinds of walls using Mutual Material blocks, and they never let us down.
Great For:
- Retaining Walls – Big or small, backyard or business
- Raised Garden Beds – Sturdy and neat
- Erosion Control – Stop that slope from washing out
CornerStone® Retaining Wall System
What is CornerStone®?
CornerStone® is a concrete block system made for gravity and reinforced retaining walls. It can handle anything from a short garden wall to a 30-foot engineered structure with reinforcement. And it looks great while doing it.
Why We Like It:
Super Versatile
- Works for straight walls, curves, corners, and even stairs
- Can be used with geogrid for extra tall reinforced walls
Smart Block Design
- Wedge shape + lug interlock system = tight fit with flexibility
- Handles 90° or 45° corners with no problem
- 2-inch lateral play in the interlock makes it easy to work around tricky layouts
Different Sizes & Styles
- Choose between flat face or radius face units
- Available in multiple sizes, including bigger 200- and 50-Series blocks for commercial jobs
- Top it off with your choice of caps and corner pieces for a finished look
Made to Last
- High-strength concrete
- Handles seismic movement without cracking or failing
- The 100-Series gives you a clean, near-vertical wall without sacrificing strength
Block Sizes:
- 100-Series Radius Face or Flat Face: 8″ x 12″ x 18″
- Cap Units & Corners: Available in both face styles
- 200- and 50-Series Units: For heavier-duty or taller structures
- POST-IN System: Makes it easy to attach railings
Color Options:
- Gray – Clean and simple
- Summit Blend – Earthy and natural
Pick what matches your house or hardscape best—we’ll help you decide.
Why Choose Lee’s General Landscaping?
Because we don’t just slap blocks together—we design and build solutions that last.
Here’s how we do it:
- Custom Designs – Every wall we build is tailored to your yard, your goals, and your budget
- Precision Installation – We do it right from the ground up—proper base, drainage, and clean finishing
- Top Materials – We use the best from Mutual Materials because we know it holds up
- No Surprises – We keep you in the loop and finish strong—no cut corners
Whether you’re building a garden bed or holding back a hillside, we’ve got the experience to do it safely, cleanly, and to last for years.
Frequently Asked Questions
Q: What makes CornerStone® better than other block systems?
A: Flexibility. You can build curves, corners, stairs—even integrate railings. And the blocks lock in tight, so they stay put.
Q: Can it handle both small and large projects?
A: Absolutely. We use it for everything from low garden walls to massive engineered walls over 30 feet tall (with reinforcement).
About Mutual Materials
We only use Mutual Materials products because they’re the best in the Northwest. Family-owned since 1900, they make everything right here in the region—so we’re supporting local while using materials we can trust.
Why We Trust Them:
- Over 13 manufacturing plants and 18 branches
- Full control from quarry to product
- Big focus on community—supporting youth, education, and housing
- Core values we stand behind: Integrity, Teamwork, Customer Focus, and Quality
Let’s Build Something That Lasts
If you’ve got a slope that needs support—or a backyard that could use a raised bed or a little structure—CornerStone® is a smart choice. And Lee’s General Landscaping is the crew to install it right.
Give us a call today, and let’s design something strong, sharp, and built to last.
