Planning a garden wall properly
A low bed edging wall, a freestanding screen and a retaining wall may look similar but do different jobs. A useful quote therefore needs more than a preferred stone: purpose, length, height, terrain and access determine the work involved.
Is the wall a boundary or does it retain soil?
A freestanding wall separates spaces without holding back higher ground on one side. A retaining wall carries forces from the ground behind it. That distinction matters even where the visible difference in level appears small.
For retaining walls, the slope and use of the ground above also matter. A lawn presents different conditions from a parking area, driveway or nearby building. The structure needs to suit the actual site; a system used in another garden is not automatically suitable.
Give length and height, not an unexplained area
State the total length and greatest visible height. If the wall follows a slope, individual sections can vary considerably. A simple sketch with lengths and heights helps with the final measurement, but need not be ready for the initial request.
Prices per linear metre and per square metre are not directly comparable. A wall 12 metres long and uniformly 0.8 metres high has, for example, 9.6 square metres of visible face on one side. That does not yet describe its thickness, foundations, corners, stepped sections or finish on both sides.
Which construction suits the garden?
Natural stone describes the material; dry stone describes construction without mortar. Natural stone can also be mortared. The choice depends on function and site, so a mortared wall is not inherently better or longer-lasting.
| Construction | Key considerations |
|---|---|
| Dry stone | Careful stone bonding and suitable support; open joints can provide habitat |
| Mortared natural stone | Suitable stone, joints and a top finish appropriate to the structure |
| Concrete wall blocks | Manufacturer requirements for assembly, backfill and loading |
| Cast concrete or L-shaped units | Design for the actual loads and space for construction or lifting |
| Gabions | Appropriate baskets, filling stone and foundation for the intended use |
Plan foundations and water management together
Visible height alone does not determine the foundation. Ground, frost exposure, wall weight and use need considering together. Existing foundations should also be checked before the wall is raised or replaced.
For backfilled walls, drainage belongs in the design from the start. Groundwater and water from the slope affect loading; backfill, filtration and discharge need to work together. Establish where water may be discharged. Adding a drainpipe in an arbitrary position is not a complete drainage plan.
Boundaries, permission and neighbouring areas
Ask the municipality about the specific location before construction. Height, changes to ground levels, land outside the building zone and proximity to roads or protected areas may matter. A supposedly universal permit-free height is not a reliable basis for projects throughout Switzerland.
At a property boundary, clarify the alignment, working access and affected neighbouring land. Where people can access the area above the wall, the need for fall protection should also be assessed. Agree who prepares drawings, any structural calculations and administrative applications.
Compare the cost of the complete wall
A price for loose walling stones cannot be compared with a finished retaining wall. Material, excavation and foundations are only part of the bill: transport, machine access, backfill, drainage and disposal can substantially affect the total. Restricted garden access may also require more manual handling or additional lifting equipment.
Ask for quotes based on the same measurements and a clear scope. Check whether quantities are fixed or charged according to the work actually completed. A site visit and examination of local conditions are often needed for a dependable retaining-wall price.
- Wall and finish. Compare material, thickness, visible faces, corners, cappings and joint appearance.
- Groundwork. Have excavation, removal, foundations, backfill and drainage explicitly listed.
- Additional services. Clarify design, permission documents, protection of neighbouring areas, VAT and garden reinstatement.
Assess an existing wall before repair
Loose stones, washed-out joints, cracks and a visible lean do not necessarily share the same cause. A surface repair achieves little if the ground is moving or water is building up behind the wall. Describe the visible damage and when it appeared.
The contractor should explain whether repointing or replacing individual stones is enough, or whether part of the wall needs rebuilding. If instability is apparent, making the area safe and identifying the cause take priority over cosmetic work. Agree which nearby surfaces and plants will be reinstated afterwards.
Frequently asked questions
Is every garden wall a retaining wall?
No. A retaining wall holds back higher ground. A freestanding wall may provide a boundary or privacy screen. Function and loading determine the construction.
Which measurements are enough for a request?
Approximate total length and maximum visible height are a useful start. You can add details of height changes between sections. Final measurement takes place before construction.
Can a low wall do without a foundation?
There is no universal answer. Even a low wall needs suitable support, depending on its construction, ground conditions and loading.
Can an existing wall simply be made higher?
Not without assessment. Raising it changes the loads on the wall and foundation, particularly if soil is added or the use of the ground above changes.
Are dry-stone walls only decorative?
No. Properly designed dry-stone walls can retain soil. The stone bonding, dimensions and site must be suitable; loosely stacking arbitrary stones is not enough.
