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The Global Insight

What is the cheapest retaining wall

Author

David Craig

Updated on April 11, 2026

The cheapest type of retaining wall is poured concrete. Prices start at $4.30 per square foot for poured concrete, $5.65 for interlocking concrete block, $6.15 for pressure-treated pine, and about $11 for stone.

What is the least expensive retaining wall?

  • Treated pine and is the least expensive material. …
  • Hardwood is more expensive than treated pine. …
  • Railway sleepers are another – slightly more expensive – option and are built to withstand ground and water contact.
  • Concrete sleepers are more expensive.

Which is cheaper wood or stone retaining wall?

Concrete retaining walls are generally more expensive than timber retaining walls which is something that you will need to keep in mind when you are setting your budget but a well built concrete retaining wall will last for 60 years or more, so it should never need replacing.

What can I use instead of a retaining wall?

  1. Reinforced Soil Slopes.
  2. Natural Stone Walls.
  3. Wooden Timbers.
  4. Gabion Walls.
  5. Soil Bioengineered Walls.

What is the easiest retaining wall?

For the average do-it-yourselfer, building a retaining wall is easiest when using masonry blocks that will be stacked no taller than three feet, with no mortar binding the stones or concrete members.

What type of retaining wall is best?

Concrete and Masonry Retaining Walls Poured concrete is the strongest and most durable choice for retaining walls. It may also be carved and formed to look like mortared stone depending on your taste.

What is the cheapest wall to build?

The cheapest types of retaining walls are wood and concrete blocks, followed by concrete and stones or bricks. Each material has benefits and drawbacks, including strength, longevity, and attractiveness. For those who are planning on building their own retaining wall, it is vital to plan and research.

Does a 2 foot retaining wall need drainage?

These walls need a drainage system regardless of the wall height. If there are poor draining soils such as clay behind the wall, there needs to be drainage incorporated the wall system. Clay when wet is very weak, so it is essential to provide a way for water to escape from behind the wall.

Can I build a retaining wall myself?

Building a retaining wall is a great way to add function and visual appeal to your garden. It not only supports the soil bed, but also makes an impressive decorative feature that’ll last for many years to come. It’s a project that you can do yourself, all you need is some basic D.I.Y.

How deep do footings need to be for a retaining wall?

All footings should be a minimum of 150mm (6″) in depth, with the bottom 350 – 400mm (14-16″) below ground level on most soils. For clay soil however, thicker and deeper footings should be used.

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Does a retaining wall need a footing?

A buried structural footing is usually required for larger retaining walls. To create this, a landscaper pours concrete below frost level (the depth to which the ground will freeze during the winter). Footings poured too shallow are prone to shifting and moving if moisture in the soil freezes and heaves.

How long do railroad tie retaining walls last?

If it is constantly exposed to lots of moisture, rain, or water, the wall likely won’t last more than 5 to 7 years. If the wall is simply holding back dirt, etc. it may last 10 to 15 years, or even more.

How long do retaining walls last?

How long will my retaining wall last? For a permanent wall structure, the general lifespan is generally between 50 and 100 years. This does, however, depend on the conditions of the soil and groundwater at your site.

What is a Deadman in a retaining wall?

A Deadman railroad tie is a railroad tie that runs perpendicular to the retaining wall and into the hill that you are building the retaining wall against. Deadman ties are great for ensuring the retaining wall is as solid as possible. We recommend using a deadman railroad tie every 20 feet of your retaining wall.

How much do Besser blocks cost?

A reinforced concrete block or Besser block retaining wall costs between $450 and $700 per square metre on average.

How much does a 10 foot retaining wall cost?

Generally speaking, the California average cost for a retaining wall is anywhere between $300-$900 per linear foot.

How much does a retaining wall cost?

The average concrete retaining wall costs between $20 to $30 per square foot for interlocking blocks, or $30 to $40 per square foot for poured concrete. A natural stone retaining wall costs between $27 and $35 per square foot. Wood retaining walls costs $16 to $28 per square foot.

Is there anything cheaper than drywall?

Plywood is the cheapest alternative to drywall on this list and allows you to finish a room with a certain flair without taking on the expenses of wood planks, veneer or drywall. … Plywood and sheet wood are also fairly straightforward to work with, no more complicated than drywall itself.

How much weight can a retaining wall hold back?

Even small retaining walls have to contain enormous loads. A 4-foot-high, 15-foot-long wall could be holding back as much as 20 tons of saturated soil.

How high can a timber retaining wall be?

* In New South Wales, you need permission from council to build a retaining wall higher than 600mm from ground level.

Does a 4 foot retaining wall need drainage?

The design and performance of most retaining walls are based on keeping the area behind the wall relatively dry. … Any reinforced wall or walls over 4 ft. (1.2 m) in height or with slopes or other surcharges above the wall will need a toe drain.

Do you need a French drain behind a retaining wall?

If you’re building a retaining wall, add a French drain behind the first course of stones or blocks. Otherwise, water moving down the hill will build up behind the wall and undermine it. The pipe should rest on the same compacted gravel base or concrete footing that supports the wall.

Do I need weep holes in retaining wall?

Retaining walls are useful structures that form a transition between areas of different elevation. Retaining walls allow steep, unusable slopes to be avoided. … Weep holes should be drilled through the wall. Weep holes allow water to escape from behind the wall.

How thick should retaining wall be?

Base width = 1/2 to 1/3 of the height of the wall. Base thickness = 1/8 of the height of the wall but not less than 12 inches. Stem thickness = 6 inches + ¼ inch for each foot of wall height.

Can you put retaining wall on concrete?

While you can build a retaining wall on concrete, it isn’t that straightforward. If you have an existing concrete base, you cannot just build your wall on top of it. Without being secured into the concrete, your wall will slide due to the soil pressure against the wall.

WHY DO Retaining walls fail?

A retaining wall will fail when it is unable to withstand the force on it created by the soil behind it. … Water is heavy, and as it builds up in the soil behind the wall the force acting on the wall dramatically increases. At some point, that force may exceed the capacity of the wall and cause the wall to fail.

Does retaining wall need rebar?

A retaining wall must provide a way to release the water that builds up in the slope behind it. … Retaining walls must be stronger than freestanding walls. Insert rebar in the footing when you pour it; this should be done at every three blocks or at intervals specified by your local codes.

How much does a railroad tie retaining wall cost?

Railroad tie retaining walls cost $25 to $30 per square foot.

What can you use instead of railroad ties?

Paving stones can be a better option than old railroad ties to create walkways in your garden. They can often be placed over turf or gravel, making them fairly easy to install. You can also create walkways using pebbles and adhesive.

What kind of retaining wall lasts the longest?

Timber retaining walls can last up to 40 years if the wood is high quality, while masonry walls if properly designed and installed, can last until someone decides to tear them down. Concrete block or poured concrete retaining walls are particularly long-lasting, as concrete is known for its strength and durability.

Do wood retaining walls last?

A timber retaining wall can last a little over a decade, if treated properly. If not maintained, the lifespan of a timber wall is around 3 to 5 years. To keep its fresh look, timber requires serious maintenance. The material will hold up for so many years only if its pressure-treated with chemicals.