What affects the cost of a garden wall

Why quotes vary so much

Two quotes for what sounds like the same wall can be far apart because they are not describing the same wall. One may include a proper footing, a double-skin wall, piers and brick-on-edge coping; the other may be single skin on the existing ground with a cement cap. Knowing the factors lets you ask the right questions. We do not publish price figures here; the cost calculator on this site gives a ballpark, and a site visit gives a written quote.

Length and height

The obvious drivers are how long and how tall the wall is, but height has a bigger effect than length. Taller walls need thicker construction, wider footings and more piers to stay stable, so cost rises faster than the height. Boundary walls over certain heights next to a road, or anywhere over a set height elsewhere, may also need planning permission, which is worth checking first.

Footings and ground

Every proper wall sits on a concrete footing below the frost line. Soft ground, clay, tree roots, old drains or made-up ground can mean deeper or wider footings. Sloping sites need stepped footings. This is hidden work, but it is the difference between a wall that stands and one that leans.

Wall construction and bond

A single-skin half-brick wall is the cheapest but needs piers at close spacing and is only suitable for low walls. A full one-brick wall laid in a decorative bond such as English or Flemish looks the same on both sides and is much stronger, but uses twice the bricks and more labour. Brick-faced blockwork is a middle route where only one face is seen.

Brick and material choice

Brick prices range widely from common facing bricks to handmade and reclaimed stock. Matching an old wall or the house can push you towards reclaimed bricks, which cost more and need sorting. Flint walls, common in parts of Hertfordshire, are slower to build and priced accordingly. The mortar mix matters too: lime mortar for old walls is slower to work than cement.

Piers, coping and details

Piers add stability and character but add bricks and time. The top of the wall needs protecting from rain with a coping or capping: brick-on-edge, creasing tiles, stone or concrete copings. Gate openings, curves, steps in height, and built-in lights or planters all add labour.

Access and old wall removal

If materials have to be barrowed through the house or along a narrow side passage, the job takes longer. Taking down an old wall, breaking out its footing and removing the waste is a separate cost many people forget to include when comparing quotes. Skip permits and parking also count.

Getting comparable quotes

Ask each builder to specify footing depth and width, wall thickness and bond, brick type, pier spacing, coping and whether removal is included. With those written down, the quotes can be compared honestly. We have built garden and boundary walls for more than 26 years, with NVQ Level 2 brickwork, FMB membership and full insurance, from our base in Bidwell, Dunstable.

Questions to ask on the site visit

When a builder visits to price a garden wall, a few questions will tell you a lot. Ask how deep and wide the footing will be and why. Ask whether the wall will be single skin, one brick thick or brick-faced block, and where piers will go. Ask which brick they propose, whether it is frost resistant, and whether it matches anything existing. Ask what coping they will use and whether the old wall, footing and waste removal are included.

Also ask about drainage if the wall holds back any soil at all, because then it is behaving as a retaining wall and the retaining wall types guide applies. A builder who answers these questions clearly is usually one who has priced the wall properly.

Questions people ask