Retaining Wall

A retaining wall is a structure designed to hold back soil and prevent erosion, but for homeowners, it's also a way to create usable outdoor space on sloped terrain. Whether you're looking at timber, stone, or concrete block options, the right wall adds both function and curb appeal. Angi helps you find local pros and resources to get your retaining wall project started.

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Common Retaining Wall Service Questions

Generally, a railroad tie retaining wall consisting of a single line of ties should be between 3 and 4 feet tall—and the height often tops out at around 6 feet. You can go taller, but you may need additional footings and reinforcements, including a second layer of railroad ties to support the added weight of the soil it’s holding back.

Regular inspection for issues like cracks or leaning and ensuring drainage stays clear.

While vinyl is the least costly material for building a retaining wall, the most cost-effective method is to use wood or concrete blocks for a DIY retaining wall under 2 feet tall. Wood is inexpensive but lasts 20 years or more with care. Concrete can cost a little more but is stronger and will last longer with less maintenance.

Generally speaking, a retaining wall should be between 3 and 4 feet high, depending on variables such as the wall-building material, the purpose of the retaining wall, and more. If you want your retaining wall to be taller than 4 feet, check with your local building ordinance office for the maximum allotment. You may also need a special permit for retaining walls over 4 feet tall.

If a leaning retaining wall isn't repaired, soil erosion will amplify until the wall eventually collapses or falls over completely. In addition to causing property damage, there's a risk that the falling wall could cause physical injury.