5.0 · 5 Google reviews Monroe alissiahomeimprovementllc@gmail.com
Alissia Home Improvement
Concrete Block Retaining Walls for Sloped and Eroding Lots

Monroe Local

Concrete Block Retaining Walls for Sloped and Eroding Lots

Structural retaining walls built with proper drainage and base prep, so the wall holds for decades.

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Concrete Block and Stone Retaining Walls That Hold

Concrete block retaining walls are not a decorative feature that happens to hold dirt. They're a structural system, and if the drainage isn't right or the base wasn't compacted correctly, the wall will fail. Orange County's terrain makes this a real concern: sloped wooded lots, rocky soil, and clay-heavy ground that holds water create serious soil pressure against any wall that wasn't built to spec. At Alissia Home Improvement, we carry 5 stars across every Google review we've received, and customers specifically call out the attention to detail. That's the standard we hold on every retaining wall job. Contact us for a free on-site estimate and we'll tell you exactly what your lot needs.

Every retaining wall project starts with a thorough site assessment: we read the slope, the soil composition, the drainage pattern, and the load the wall will need to carry before we put a single block in the ground. Material options include concrete block, natural stone, and decorative block systems, each with different structural profiles and aesthetics. The factors that drive cost are wall height, total linear footage, site access, drainage complexity, and whether the existing grade needs significant excavation before construction begins. A short garden-tier wall on flat ground and a tiered structural wall on a steep hillside are completely different scopes. Every job is different, contact Alissia Home Improvement for an accurate estimate.

Why Drainage Determines Whether a Wall Stands or Fails

Retaining walls

Water pressure behind a wall is the most common reason retaining walls crack, tip, or collapse.

Hydrostatic pressure builds when water saturates the soil behind a wall and has nowhere to go. We install drainage aggregate and, where necessary, perforated pipe behind every wall we build. This isn't optional on Orange County lots, where heavy rain events and clay soils create real water volume behind any vertical structure. We also factor in grading above the wall to direct surface runoff away from the retained face. Skipping this step is how you end up with a wall that looks fine in October and is leaning in April. We won't skip it.

Our Process

How We Build a Retaining Wall

Three phases, done in order, with no steps skipped.

  1. 01

    Site Assessment and Excavation

    We evaluate slope angle, soil type, and drainage before any material is ordered. The base trench is excavated to the correct depth for the wall height, then compacted gravel is set as the foundation layer. Shallow excavation is the most common mistake on DIY walls. We dig to depth.

  2. 02

    Block Installation and Batter

    Each course is set level and with the correct setback angle to counteract soil pressure. Concrete block walls require a consistent batter, meaning the wall leans slightly into the slope. This is structural, not cosmetic. Drainage aggregate is packed behind each course as the wall rises.

  3. 03

    Backfill, Grading, and Cleanup

    Once the wall is at full height, we backfill in compacted lifts and restore the grade above. The finished grade should direct water away from the wall's face. We leave the site clean and walk you through the completed work before we go.

Material Options

Block, Stone, or Poured Concrete: Choosing the Right Material

01

Concrete Block

Segmental concrete block systems are the most common choice for residential retaining walls. They're engineered for consistent sizing, interlock well, and handle substantial soil pressure when installed with proper batter and drainage. Good for walls up to 4 feet in height without engineering plans.

02

Natural Stone

Natural fieldstone or cut stone walls carry more visual weight and blend into wooded or rural settings. They require more skill to set correctly because each piece is irregular. When laid with proper drainage behind, they last for generations. We do this work on properties where the aesthetic matters as much as the structure.

03

Poured Concrete

For walls carrying heavy loads or requiring engineered specifications, poured concrete is often the spec. It's common in foundation and grade-separation work, and it pairs well with the concrete work we do on the same property. We handle the formwork, pour, and finish.

04

Decorative Block Systems

If you want a paver patio or finished hardscape adjacent to the wall, decorative block systems give you a coordinated look across the whole project. The blocks come in multiple textures and colors and are fully structural when installed correctly.

What a Properly Built Wall Actually Gives You

A retaining wall that's designed and built correctly does several things at once. It stops soil movement on sloped lots, which means your lawn, garden, and any structures above are no longer at risk of erosion. It creates usable flat space on grades that were previously dead ground. It manages water runoff more predictably, which protects the lot downhill from your property. And it can anchor a broader hardscape plan, connecting to a patio, walkway, or driveway edge in a way that makes the whole property feel intentional. Cassandra Uribe, who had both a patio and retaining walls done, put it plainly: the team took care of all the details. That's what proper construction looks like.
  • Stops active soil erosion on sloped lots
  • Creates level usable space from steep or unusable grade
  • Manages surface and subsurface water runoff
  • Protects structures, driveways, and landscaping above the wall
  • Integrates with patios, walkways, and hardscape projects
Retaining walls

Three Signs Your Property Needs a Retaining Wall

  1. 01

    Soil Moving After Rain

    If you see soil washing downhill, ruts forming, or mulch migrating after heavy rain, the grade isn't stable. A properly placed wall stops the movement and redirects runoff before it undermines anything structural.

  2. 02

    A Slope You Can't Use

    Hillside lots where you can't mow, plant, or park without the ground giving way are candidates for tiered retaining walls. We can convert a steep bank into multiple level terraces with proper grading and excavation behind each wall.

  3. 03

    An Existing Wall That's Leaning or Cracked

    A retaining wall that's visibly moving is not a cosmetic problem. It means the drainage failed, the base shifted, or the wall was undersized for the load. Rebuilding it correctly costs less than addressing the erosion and property damage after it goes.

Straight from Google

What Clients Say About Our Retaining Wall Work

5.05 verified Google reviews
Jesus and his team were wonderful to work with in pouring new concrete driveway. We had issues with drainage and the drive was pitched toward the house. He and his team worked diligently and to ensure everything was level and pitched the right way. He communicated throughout each step of the process and wanted to ensure we were happy as things moved along. Would definitely recommend his team and I plan on calling him again in the future.
Stephanie RiccardiStephanie RiccardiSep 2026 · Google
What a great guy! Exceptional work. Did my walkway with blue stone and im vary happy with it.
Kristina BarnesKristina BarnesJul 2026 · Google
Jesus is professional about every detail. He has great insight on how to accomplish the best way to build something and worked with us, collaborating on design.
Lesli UribeLesli UribeJul 2026 · Google
Jesus and his crew did a great job with cleaning up our yard and power washing house and deck
Stacy HenzeStacy HenzeJul 2026 · Google
Jesus and his team did an excellent job on our patio and retaining walls. They look great and him and his team were so helpful and took care of all the details. Highly recommend
Cassandra UribeCassandra UribeJul 2026 · Google
Read all 5 reviews

Retaining Wall Questions, Answered Directly

How much does a 100-foot retaining wall cost?
The cost of a 100-foot retaining wall depends on height, material, site access, and how much drainage work the job requires. A low concrete block wall on accessible flat ground is a different scope than a tiered stone wall on a steep slope with poor drainage. Those variables push the total across a very wide range. Every job is different, contact Alissia Home Improvement for an accurate estimate.
How deep does the base of a retaining wall need to be?
A general rule is to bury at least one course of block below grade, which means at least 6 to 8 inches for most segmental block systems, plus compacted gravel beneath that. Taller walls need deeper bases. In Orange County's frost zone, the base also needs to sit below the freeze line so frost heave doesn't shift the first course. Contractors who skip this step build walls that lean within two winters.
Do retaining walls in New York require a building permit?
Permit requirements vary by municipality and by wall height. In most Orange County jurisdictions, walls above 4 feet in height require a permit and sometimes a stamped engineer's plan. Shorter walls on private property often don't. We advise every client on the permit situation for their specific town before construction begins, and we don't cut corners on the permit question.
What's the difference between a retaining wall and a garden wall?
A garden wall is decorative and holds little to no soil load. A retaining wall is structural: it's actively holding back earth and managing the forces that soil pressure, water, and freeze-thaw cycles create. Building a retaining wall the same way you'd build a garden border is one of the most common reasons residential walls fail. They require different base depths, drainage systems, and material sizing.
How long does a concrete block retaining wall last?
A properly built concrete block retaining wall, with correct drainage and a compacted gravel base, routinely lasts 20 to 40 years or more. The drainage is the deciding factor. Walls that don't have drainage aggregate or outlet points behind them accumulate hydrostatic pressure and start moving within a few years regardless of the material. Get the drainage right and the wall takes care of itself.
Can I build on top of a retaining wall or use the retained area as a patio?
Yes, and that's a common project scope. A retaining wall that creates a level pad above the grade can support a concrete patio, a deck, or a landscaped terrace. The wall just needs to be designed for the load it will carry, not just for holding soil. We look at the whole scope when we assess the site so the wall is sized for what's going on top of it.
Can the area above a retaining wall support a patio or deck?
Yes. A retaining wall that creates a level pad is a common foundation for a concrete patio or deck. The wall just needs to be designed for the load it will carry, not only for soil retention. We assess the entire scope during the site visit so the wall is sized correctly for whatever goes on top of it.
What causes a retaining wall to lean or crack over time?
The two most common causes are inadequate drainage behind the wall and a base that wasn't compacted or set deep enough. Hydrostatic pressure from trapped water pushes the wall forward. Frost heave lifts and shifts the base. Both failures are preventable with proper construction. A wall that's already leaning needs to be assessed before it fails completely.

Retaining Wall Installation Across Orange County

We work on sloped and wooded residential lots throughout Orange County and the surrounding area. If you're dealing with erosion, a collapsing existing wall, or a grade that's making part of your yard unusable, call us for a free on-site look.

Get a Free On-Site Estimate for Your Retaining Wall

We'll come out, read the slope, and tell you exactly what the job requires. No obligation.

Soil moves. Walls that weren't built to spec fail. If your property has a slope that's eroding, an existing wall that's leaning, or grade that makes part of your lot unusable, the longer you wait the more work the fix becomes. We're fully insured, licensed in New York State, and handle everything from site excavation to finished wall. Reach out to schedule your free on-site estimate.
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