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  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon86
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Verified Reviews for Retaining Wall Installation pros in Washington, IL

*The Angi rating for Retaining Wall Installation companies in Washington, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Retaining Wall Installation needs.

*The HomeAdvisor rating for Retaining Wall Installation companies in Washington, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Retaining Wall Installation needs.

Last update on August 01, 2026

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Avatar for L & Q LANDSCAPING-CONSTRUCTION, LLC
L & Q LANDSCAPING-CONSTRUCTION, LLC
3.4(
8
)
Retaining Wall - Install

Serving Washington, IL and surrounding areas

In business since 2021

Free estimates

Small jobs welcome

"Excellent results, speedy completion in one day for a living room and stairwell. We highly recommend them for painting your home. Thanks L Q for your excellent work."
Brick Patio
Concrete
Rock and Stone
Rubber Mulch
Brick and Stone

+2

Response time10 mins
Response rate100%
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Retaining Wall Installers questions, answered by experts

Poured concrete is often the cheapest material for a retaining wall, costing around $6 to $8 per square foot. Other budget-friendly options include vinyl and landscaping timbers, which range from $10 to $15 per square foot; landscaping timbers are particularly well-suited for DIY projects. Untreated timber and railroad ties are a step up in price, starting at $15 to $25 per square foot. Natural stones can also be a cost-effective choice if you can source them from your own property, but they can be expensive to purchase. High-end materials like steel are typically the most expensive but offer superior durability and aesthetics.

To maintain the integrity of your landscape, a retaining wall must be installed if the slope of the angle exceeds 35 degrees. The lean of the wall must be 1 inch per 12 inches in height to disperse the weight of the soil uniformly and guarantee the correct drainage of the soil.

Each design is different, so we can’t say definitively if you’ll need a dedicated drainage system in place for a two-foot retaining wall. However, you can likely skip the drainage, as this project is typically served for walls that are 4 feet tall or more. Even with a relatively low wall, consider drainage if you are building on top of clay or poor-draining soil types or if there are buried water sources nearby, like a well used for other outdoor garden projects.

They prevent soil erosion, add flat space, and enhance property aesthetics.

The longevity of flood walls depends on how they were constructed, but most wood, gravel, and cement flood walls last 10 years. While aluminum flood walls may cost far more initially, they can be a good investment as they can last decades and will not be damaged by exposure to the elements.

The Washington, IL homeowners’ guide to retaining wall installation services

From average costs to expert advice, get all the answers you need to get your job done.

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