Retaining Wall Cost Guide: Average UK Prices 2026

Retaining walls in your garden stop soil erosion and hold back soil on sloping land so it doesn’t collapse and slide down to the ground below. They also help you level out the soil and make better use of the available space.

Many homeowners install a retaining wall to support landscaping projects or improve garden usability. It can also help prevent damage to buildings or other structures caused by soil movement.

Retaining walls can be built using a variety of materials, including brick, concrete blocks, natural stone, timber and reinforced concrete.

In this guide, we’ll break down retaining wall costs, the factors that affect the overall price, how long the work is likely to take, and what to expect if you hire a professional.

How Much is a Retaining Wall?

The cost to install a retaining wall in the UK is usually between £200 and £450 per square metre. Retaining wall specialists often charge on a per-square-metre basis rather than by the hour, because this gives a fixed price for the job and usually covers labour, materials and, in many cases, waste removal and disposal.

The total cost to build a retaining wall will depend on the size of the wall and the materials used to build it.

Key factors affecting the price include:

• Wall height and length
• Type of material used
• Ground conditions
• Drainage requirements
• Accessibility of the site
• Labour rates

If you have a wall that is both long and high, you will need deeper foundations and stronger reinforcement. This makes the job more expensive because more materials are needed and extra labour is involved.

There are various materials you can use to build a retaining wall. Timber or concrete blocks are generally the more budget-friendly options, while natural stone or reinforced concrete will cost more.

If the ground conditions aren’t suitable, you may need excavation or reinforcement work before the wall can be built, which will add to the total cost. Drainage is also a very important part of a successful retaining wall installation. Without proper drainage pipes, water can build up behind the wall and cause it to fail.

If access to your garden is difficult, this may also increase the price. For example, certain materials like concrete may need to be moved into the garden by hand using wheelbarrows rather than being delivered directly by lorry chute or pump.

Although retaining wall costs are usually priced on a square metre basis, labour is still included within the overall total. You may find you pay more per square metre if you live in London or the South East, where labour rates are typically higher.

Retaining Wall Prices

Below is a table showing typical retaining wall costs in the UK:

Supply Costs

The supply costs for a retaining wall will depend very much on the size of the wall, the complexity of the job and whether you use concrete blocks, timber, bricks or natural stone.

Here are the most common materials required to build and install a retaining wall. If you need a budget-friendly option, timber or concrete blocks are usually a good choice. If you want reinforced concrete or natural stone, you should expect to pay more.

Concrete Blocks

Concrete blocks are cost-effective and are widely used for garden retaining walls. They usually cost around £75 - £85 per m².

Bricks

Bricks are an effective material for smaller walls. Engineering bricks are usually used for retaining walls because they are stronger and more durable.

Generally, they cost between 80p and £3 per brick, although they are often sold in packs of 400 or 500.

Natural Stone

Natural stone looks great and is extremely durable, but it is a more expensive option. You can expect to pay between £150 and £300 per m².

Timber Sleepers

Timber is another budget-friendly choice. You can expect to pay between £20 and £50 each for a timber sleeper, and they are often sold in packs.

Reinforced Concrete Materials

Materials used to reinforce foundations include steel bars and mesh kit sheets. You can pay between £35 and £170 for rebar and between £100 and £700 for mesh kits, depending on how much you need.

If you use reinforced concrete to build the retaining wall, the per-square-metre cost will be slightly higher than concrete blocks. You should expect to pay around £35 - £55 per m² more.

Drainage Pipes

Drainage is an essential part of retaining wall construction. Prices depend on the length of the pipe and the material used, but on average you can expect to pay between £12 and £25 per pipe.

Gravel or Aggregate Backfill

You will need gravel or aggregate as part of the drainage installation. Average costs are between 30p and 50p per kilo, although these are often sold in sacks ranging from 15kg to around 850kg.

Mortar or Cement

If you are using stone, bricks or blocks, you will also need mortar or cement. Costs per kilo are usually between 25p and £3.

Additional Costs

It’s important to remember that there may also be additional work involved that can increase the overall cost of a retaining wall project.

Examples include:

• Excavation and ground preparation - £80 - £130 per m²
• Drainage installation - £12 - £25 per linear metre
• Removing existing structures or walls - £200 - £250 for a small wall
• Waste removal - £50 - £300
• Landscaping after construction - £26 - £65 per hour
• Reinforcing foundations - £35 - £700
• Installing steps near the wall - £600 - £1,200 for 4 steps
• Constructing a pathway - £8 - £80 depending on material

If excavation work is needed to level the ground before the retaining wall is built, this can add quite a bit to the final price. Drainage work may sometimes be included in the quote, but if it isn’t, it is an extra cost you will need to budget for.

The cost to remove an existing wall or structure will depend on the size and ease of access to your garden. Waste removal will also vary depending on how much debris is produced during the job.

If you would like extra landscaping work once the wall has been completed, you may need to hire a landscape gardener. This can include replanting, reshaping garden areas or improving the overall look of the finished space.

It’s particularly important to include groundworks and drainage when constructing a retaining wall. Without them, excess water can build up behind the structure and eventually cause it to fail.

Labour Costs and Timescales

Labour costs and timescales for hiring professionals to build and install a retaining wall will depend on a number of factors, including the size of the wall, the materials used, the complexity of the design and the ground conditions.

Size and Height of the Wall

The size and height of the wall will influence how long the work takes to complete. Taller walls are usually more complex and time-consuming to build, which increases the cost of labour.

Materials Used

Labour costs will also rise if the material used is more delicate or requires more skill to install. For example, natural stone needs more expertise than concrete, and brickwork usually takes longer to lay than timber.

Complexity of the Design

Decorative designs or curved walls will take longer to construct and so increase labour costs. Some materials, such as natural stone, can also be arranged in a way that creates a more decorative finish.

Ground Conditions

If additional ground preparation is needed before construction can begin, this can increase both labour time and overall job costs.

Although your quote for building a retaining wall may be based on a square metre rate, the installer will already have factored labour into that price. However, extra work involving other trades, such as gardeners, builders or groundworkers, will more than likely be charged separately at hourly rates.

Here are some average hourly rates for tradespeople you may need while having a retaining wall constructed. Expect to pay around 20% to 25% more if you live in London or the South East of England.

The typical timeframes for retaining wall construction are usually:

• 1 – 2 days for a small retaining wall
• 2 – 3 days for a medium retaining wall
• 3 – 5 days or longer for a large or structural retaining wall

Cost Factors for Retaining Wall Installation

The main factors affecting the cost of a retaining wall include the following:

Wall Height and Length

Longer and taller walls need more structural support, which increases the amount of labour and materials needed.

Type of Materials Used

Natural stone or reinforced concrete is more expensive than concrete blocks or timber sleepers, both in terms of materials and labour.

Ground Conditions and Soil Stability

Poor ground conditions may require reinforcement and extra preparation, which will increase the total cost of the work.

Drainage Requirements

If drainage isn’t included in your quote, you will need to budget for the extra cost of a proper drainage system.

Accessibility of the Garden

Limited access increases labour costs because it can take longer to transport machinery and materials into position.

Complexity of the Design

Another factor that can add to the overall cost is the extra time and skill needed to complete a non-standard or decorative design.

Reinforcement Requirements

If you need a structural retaining wall, you may need to include the cost of steel reinforcement to strengthen the wall. Higher walls often require stronger foundations and additional reinforcement.

Regional Labour Costs

Labour costs vary throughout the UK. You are likely to pay more in urban areas, especially London and the South East of England.

Building Regulations for Retaining Walls

Not all retaining walls need planning permission or building regulations approval. For example, walls under 1 metre in height do not generally need planning permission.

However, if you want to build a wall over 1 metre high near a road or boundary, or over 2 metres high elsewhere, you may need planning approval and/or building regulations approval.

Walls built to support particularly heavy loads of soil may also require engineering calculations from a structural engineer to make sure the wall is safe.

Before starting any type of construction work, it is always best to check with your local council first. Contact your local planning department and explain what you want to do. They can then confirm the rules and let you know whether any further action is required.

Types of Retaining Wall

The most commonly used materials for retaining walls are timber, concrete, brick or masonry, and natural stone.

Timber Retaining Walls

Timber retaining walls are often built using wooden sleepers. These are relatively affordable and commonly used in garden landscaping projects.

Pros

• ✔ Attractive appearance
• ✔ Cost-effective
• ✔ Easier to install

Cons

• ✖ Must be maintained to prevent rot and insect infestation
• ✖ Shorter lifespan than stone or concrete

Brick Retaining Walls

Brick retaining walls provide a traditional appearance and good durability, but they may require stronger foundations.

Pros

• ✔ Strong
• ✔ Durable
• ✔ Low maintenance

Cons

• ✖ Labour-intensive installation
• ✖ Limited design options

Concrete Retaining Walls

Concrete blocks are widely used because they are strong, durable and relatively cost-effective.

Pros

• ✔ Weather resistant
• ✔ Durable
• ✔ Affordable

Cons

• ✖ More complex to install
• ✖ Not as attractive as wood or natural stone

Natural Stone Retaining Walls

Stone retaining walls offer a natural appearance and excellent durability, but they can be more expensive because of the material and labour involved.

Pros

• ✔ Natural look
• ✔ Long-lasting
• ✔ Unique appearance

Cons

• ✖ Requires a skilled professional to install
• ✖ Expensive

Alternative Types of Garden Wall

If you decide not to go ahead with a retaining wall, there are a few alternatives you may want to consider instead.

Gabion Basket Walls

Gabion basket walls are cages filled with stones, which makes drainage much more effective. They are slightly more expensive than timber, but they are not always considered as attractive. You can expect to pay between £240 and £350 per m².

Garden Steps and Terraces

Creating terraces on different levels can sometimes replace the need for a retaining wall. This can be an attractive option, although it may be more expensive, especially if you also need paths and steps for access.

The cost to create steps and paths depends on the materials used and the size of the project. On average, you can expect to pay between £20 and £90 per m² for materials and between £30 and £50 per hour for labour.

Raised Planting Beds

Smaller retaining walls can be used to create raised planting beds, which can be a cost-effective landscaping option if you do not need full structural support across a large area.

Reinforced Slopes or Landscaping Terraces

You can also use plants or reinforcement systems, rather than a full retaining wall, to stabilise smaller slopes if you need a more budget-friendly option.

Hiring Contractors Checklist for Retaining Wall Installation

When choosing a contractor to build a retaining wall, there are a few important things you should check first:

• Get two or three quotes so you can compare prices and what is included
• Check whether the professional has Public Liability Insurance
• Make sure the quote is provided in writing
• Ask whether they have experience building retaining walls
• Look for reviews, feedback or testimonials from previous customers

Only getting one quote means you don’t have the chance to compare prices or see what different professionals include in the cost. A written quote is especially important, as it clearly shows the agreed work and total price.

It is also essential to choose someone with the right experience. A retaining wall needs to be installed correctly, especially if it is holding back a large amount of soil. Using a professional with the proper background will help ensure the wall is built to last.

Removing an Existing Retaining Wall

If you already have a retaining wall that is damaged or has failed, you may need to remove or replace it before building a new one. Replacing an old or damaged retaining wall can improve safety, improve drainage and help prevent soil erosion issues.

The cost of removal will depend on:

• Wall size and material
• Accessibility of the site
• Waste removal requirements
• Ground preparation after removal

The average cost to remove a small retaining wall is usually in the region of £200 to £800.

FAQs