Brick & Block Calculator UK

Ordering Bricks the Right Way

Packs, Pallets, and the Problem of Matching

UK bricks are delivered in strapped packs, typically 400–500 bricks per pack depending on the manufacturer, loaded onto pallets by a hiab wagon. Always order in complete packs — suppliers won't split them, and rounding your order to the nearest pack is simply part of the process. If the calculator tells you 1,140 bricks, you're ordering three packs of 400 or two-and-a-bit packs of 500 — check your supplier's pack size before finalising the order.

Matching existing brickwork is where things get complicated. Brick colour, texture, and size vary enormously — even within the same manufacturer's current range, let alone between production batches. Pre-metric imperial bricks (still common in pre-1970s buildings) are slightly smaller at roughly 9" × 3" × 4.5" (228 × 76 × 114mm), which changes the joint sizing and coursing compared to modern metric bricks. If you're matching old work, take a sample to the specialist supplier, not just a description. Get written confirmation of the batch reference if you're ordering in multiple deliveries — a colour mismatch between first and second delivery on a high-visibility wall is one of those problems you really don't want.

Half Brick, Full Brick, or Cavity Wall?

A half-brick wall (102.5mm) is the most common application for garden walls, internal partitions, and the outer leaf of a cavity wall in a new house. A full brick wall (215mm) was standard in houses built before the 1930s and is still used for freestanding piers, retaining walls, and situations where a single-leaf wall needs to be loadbearing and substantial. For new-build houses, the structural wall is actually two separate half-brick skins separated by a cavity — the outer leaf is facing brick, the inner leaf is typically blockwork. Calculate each skin separately.

Engineering bricks (Class A and B) are a different proposition entirely — much denser and more impervious than standard facings. They're used below the damp proof course, for manholes and inspection chambers, and anywhere with high moisture or chemical exposure. They're harder to cut cleanly and the mortar specification changes (usually a stronger 1:3 mix). The brick count is the same, but factor in the extra labour and the different mortar regime.

Waste, Cuts, and What the Numbers Don't Show

Ten percent waste is a sensible default for straightforward stretcher-bond walling with few openings. In practice, waste climbs quickly with complexity. Every external corner generates cut bricks — a quarter-brick header every other course on each quoin. Window and door reveals are where bricks meet frames at awkward angles. Decorative features like soldier courses, dog-tooth courses, or arched heads waste material rapidly. For a simple garden wall with no openings: 7–8% is achievable. For a detailed house front with bay windows, different bond patterns, and cut arches: 15% is not unreasonable.

One thing that often gets missed: store bricks under cover on site. Rain-saturated bricks absorb moisture into the mortar joints before they can dry out, which slows curing and can cause efflorescence (white salt staining) on the face of the wall. It's a small logistical point that makes a real difference to the finished appearance of the work.

How Much Does Brickwork Cost per m² in the UK? (2025)

Labour and material costs vary by brick type, complexity, and region, but as a 2025 guide: facing brickwork (half-brick outer leaf) supply and lay typically runs £65–120 per m² for a standard face brick on straightforward stretcher bond with good access. Engineering brickwork (below DPC, retaining walls) is similar in material cost but slower to lay — expect £75–130 per m². Full brick solid walling (215mm) costs approximately £110–180 per m² supply and lay. Complex decorative bond, arched heads, or work at height adds 20–40% to the labour element. These figures are for the structural and facing brickwork only — scaffold, groundwork, and mortar pointing are additional.

For garden walls, a rough guide per linear metre: a single-skin garden wall to 1.8m high including concrete strip footing costs approximately £150–280 per metre for a standard facing brick. A full-brick (215mm) garden wall to the same height typically costs £280–450 per metre. Figures include excavation, footing, brickwork, and a weathered joint — but not coping stones, piers, or gates. London and South East rates typically run 25–40% above the Midlands benchmark. Always get at least three quotes and check the contractor is insured and registered for the work.