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Blockwork - 100mm – cost per m² – UK 2026 Rate Guide

Budget rate for supply & lay · typical budget rate before your adjustments

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Blockwork - 100mm
per m² · supply & lay
£68 – £138 / m²
What is it

Supply and laying of 100mm-thick concrete blockwork in mortar to form internal or external walling.

Rate guide
Standard aggregate blockwork£68 – £90/m²
Lightweight blockwork£75 – £99/m²
Dense or high-strength blockwork£79 – £108/m²
Enhanced acoustic or detail-heavy blockwork£94 – £127/m²
Fair-faced blockwork£99 – £138/m²
Labour output
Clear, repetitive runs with good logistics20–28 m²/gang-day
Normal walling with routine junctions14–20 m²/gang-day
Frequent openings, cuts and returns9–14 m²/gang-day
Broken-up work or restricted access5–9 m²/gang-day
Key rate adjusters
Block selection
Lightweight, dense or specialist acoustic blocks can add £6–£18/m² against standard aggregate units.
Working height
Mobile access equipment, loading platforms and additional handling can increase the rate by 10–25%.
Openings and cuts
Doorways, service penetrations, short returns and closure pieces can increase laying costs by 15–35%.
Ancillary components
Bed-joint reinforcement, proprietary ties and local strengthening typically add £4–£12/m².
Package size
Small or dispersed quantities can carry an additional £10–£25/m² due to reduced gang continuity and repeated setup.
Programme pressure
Out-of-sequence working, acceleration or restricted delivery periods can increase the overall rate by 5–15%.
Quantity surveyor insights
  • Waste and buildability: Allow around 3–5% block waste on regular layouts, rising to 7–10% where dimensions create extensive cutting; early coordination of wall lengths, openings and block coursing protects both output and material yield.
  • Scope and procurement: Ensure quotations align on ties, reinforcement, DPCs, lintels, movement joints, fire interfaces, access and distribution, as these are common scope gaps; secure specialist or fair-faced blocks early where colour, texture or performance limits substitution.

Estimate Anything AI answer · indicative budget rates · updated 31 August 2026

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