Service

Retaining Walls

Where ground is held back to create level gardens, driveways or terraces, a retaining wall does real structural work and must be designed for the forces acting on it. We provide robust, buildable designs that manage ground pressures and drainage properly.

Domestic projects often extend beyond the main dwelling and can involve significant structural and ground engineering considerations. Whether constructing a retaining wall to accommodate changes in level, building a detached garage, creating a garden office, or developing a bespoke outbuilding, Tashi Structures provides practical and proportionate engineering solutions tailored to the specific requirements of each project.

Our services include foundation design, retaining structures, masonry, timber and steel-framed buildings, external staircases, raised terraces, boundary structures and other specialist residential elements. Designs are developed with buildability, durability and cost-efficiency in mind, providing clear calculations and construction information suitable for Building Control approval, contractor pricing and construction.

Key points

Designed for soil and ground pressures
Proper drainage detailing behind the wall
Foundation design suited to the ground
Height and loading assessed for approval
Boundary and party wall considerations
Durable, cost-conscious construction details

When you need this

A retaining wall is needed wherever there is a change in ground level that must be supported, such as a sloping garden, a sunken patio, a raised terrace or a cut for a driveway.

Design and Building Control approval generally become important as walls increase in height, where they carry additional loads such as a driveway or building above, or where they sit on or near a boundary.

Frequently asked questions

At what height does a retaining wall need engineering design?

There is no single fixed figure, but as height increases the forces grow quickly and proper design becomes essential. Walls retaining significant ground, or carrying loads above, should always be designed by an engineer and will typically need Building Control approval.

Why is drainage behind the wall so important?

Water trapped behind a wall builds up pressure that can push it over or cause it to fail over time. We detail drainage and backfill so that water is relieved and the wall is not overloaded.

Does ground or soil type affect the design?

Yes. Different soils exert different pressures and offer different support to foundations, so the wall and its foundation are designed to suit the conditions on your site.

What if the wall is on or near my boundary?

Walls on or close to a boundary can raise neighbour and party wall considerations. We design with these constraints in mind and can advise where the Party Wall etc. Act 1996 may apply.

Can you design walls in different materials?

Yes. Depending on height, loading and appearance we design retaining walls in masonry, reinforced concrete and other forms, selecting an approach that is durable and cost-effective for your site.