When it comes to landscape design, retaining walls play a crucial role in controlling erosion, leveling slopes, and adding aesthetic appeal.

However, they can also be expensive to construct, depending on the materials and design you choose.

If you’re looking to build a cost-effective retaining wall without sacrificing durability and function, it’s important to understand the options available.

In this article, we’ll explore the cheapest types of retaining walls and factors that can influence their overall cost.

Cheapest Retaining Wall Types

1. Treated Timber Retaining Walls

Treated timber is often the most affordable option for retaining walls, especially for small to medium-sized projects.

Timber is lightweight and easy to work with, which reduces labor costs and makes installation faster.

On average, timber retaining walls can range from $15 to $30 per square foot, depending on the type of wood and the project size.

Pros: Cost-effective, easy to install, natural appearance.
Cons: Susceptible to rot, shorter lifespan (15-20 years), limited height capacity.

2. Concrete Blocks

Concrete block walls are another budget-friendly option, particularly if you’re building a small wall.

Precast concrete blocks, often called cinder blocks or concrete masonry units (CMUs), are inexpensive, durable, and relatively easy to install.

Basic concrete block retaining walls can cost between $20 and $40 per square foot.

Pros: Long-lasting, strong, and low maintenance.
Cons: Labor-intensive to install, less aesthetically pleasing in raw form.

3. Gabion Walls

Gabion retaining walls consist of wire cages filled with rocks or other materials, providing a natural and rugged look.

This type of retaining wall is particularly affordable if you have access to inexpensive or free fill materials like recycled concrete or stones.

Gabion walls typically cost between $10 and $30 per square foot, making them a competitive option for those looking to save money.

Pros: Environmentally friendly, flexible design, strong and durable.
Cons: Aesthetic appeal might not fit all landscapes, requires regular maintenance for the wire mesh.

4. Poured Concrete

While poured concrete walls can become expensive depending on the finish and design, a basic poured concrete retaining wall can still be cost-effective for small projects.

This type of wall provides a sleek and modern look, along with durability. Basic poured concrete walls can cost between $25 and $40 per square foot, depending on the wall’s height and thickness.

Pros: Highly durable, modern appearance, long lifespan.
Cons: Requires professional installation, labor-intensive, can crack if not properly reinforced.

5. Dry Stack Stone Walls

For a natural look, dry stack stone retaining walls are a good low-cost option. This technique involves stacking stones without mortar, and the walls can be built with locally sourced materials, reducing overall costs.

While labor-intensive, if you’re handy and willing to do the work yourself, it can significantly lower expenses. Dry stack stone walls can cost between $20 and $45 per square foot.

Pros: Natural appearance, no mortar required, environmentally friendly.
Cons: Labor-intensive, not as strong as other options, height limitations.

Factors That Change Retaining Wall Costs

1. Height and Size

The taller and longer the retaining wall, the more materials and labor will be required, which will increase the cost. Lower walls, under 4 feet, are usually more affordable and easier to build.

2. Labor

If you plan to hire professionals to install the wall, labor costs will significantly affect your budget. DIY installation can reduce costs but requires proper planning and knowledge.

3. Site Conditions

The condition of the land where the retaining wall will be built can impact the overall cost. If excavation, grading, or additional support is needed, expenses can quickly add up.

4. Materials

The cost of materials can vary significantly based on location, availability, and the specific type of material chosen. Recycled materials or locally sourced stones can lower material costs.

5. Drainage

Proper drainage is essential for a functional retaining wall, as water buildup can cause failure. Adding drainage solutions such as perforated pipes or gravel will increase costs but is necessary for long-lasting performance.

Conclusion

If you’re looking for the cheapest type of retaining wall, treated timber, concrete blocks, and gabion walls are excellent options to consider.

Each type has its advantages and drawbacks, so the best choice depends on your budget, aesthetic preferences, and the landscape requirements. Get the free quote on how much your retaining wall will cost you.