🇬🇧 Masonry cavity wall (double-skin brick and block)

UK Self Build Bill of Quantities Generator

Real cavity-wall brick and block quantities, NRM2 categories, and the VAT self-build reclaim most calculators leave out entirely.

Most UK self-build cost tools return a single £/m² figure — a fine starting benchmark, but it tells you nothing about your actual house. This generator instead produces a real bill of quantities structured around NRM1/NRM2 elemental categories, the same numbered framework UK quantity surveyors already use to compare tenders, so what you get out actually reads like a UK QS's own document rather than a generic spreadsheet.

The brick and block quantities themselves are real, cited coefficients, not a rounded guess: roughly 60 bricks per square metre for the outer facing-brick leaf and 10 blocks per square metre for the inner blockwork leaf of a standard double-skin cavity wall, cross-checked against multiple published UK brick and block calculators — the same real assembly Building Regulations Part L and Part F actually govern, not a single-skin veneer number borrowed from a different market.

It also covers a genuine fiscal advantage most generic BOQ tools never mention: new-build UK homes are zero-rated for VAT under HMRC Notice 708, and a real DIY self-builder can reclaim VAT already paid via the DIY Housebuilders Scheme (Notice 431NB) within 3 months of completion. This generator shows a real, disclosed reclaim estimate — clearly labeled a planning figure, not a submitted claim — plus an honest note on Community Infrastructure Levy exemptions, rather than pretending VAT doesn't exist.

What's in a United Kingdom BOQ from this generator

  • Foundation and substructure
  • Cavity wall: outer brick leaf (60/m²) and inner block leaf (10/m²), counted and priced separately
  • DPC, cavity wall insulation and loft insulation (mandatory under Part L)
  • Roof structure and covering
  • Windows and external/internal doors
  • Plasterboard, painting, flooring and wet-area waterproofing
  • Consumer unit, interlinked smoke/heat alarms (Part B), and a wet central-heating system (boiler + radiators)
  • Staircases and garage (if selected)
  • Preliminaries (NRM1 bill 9), plus a real VAT zero-rating/DIY reclaim breakdown and CIL exemption note
CurrencyGBP
Construction SystemMasonry cavity wall (double-skin brick and block)
BOQ StandardNRM1 / NRM2 (New Rules of Measurement)
PricingYour own local rates — free

United Kingdom Bill of Quantities — Frequently Asked Questions

How many bricks and blocks does a UK cavity wall actually need per square metre?
Roughly 60 bricks per m² for the outer facing-brick leaf and 10 blocks per m² for the inner blockwork leaf of a standard double-skin cavity wall (215×102.5×65mm brick, 10mm mortar joint), cross-checked against multiple published UK brick and block calculators — the coefficients this generator's UK quantities are actually built on.
Can I really reclaim VAT on a UK self build?
Yes — new-build residential construction is zero-rated for VAT under HMRC Notice 708, and if you're a genuine DIY self-builder (not a VAT-registered developer), you can reclaim VAT already paid on materials via the DIY Housebuilders Scheme, a one-time claim within 3 months of completion under Notice 431NB. This generator shows a real, disclosed reclaim estimate — a planning figure, not a submitted claim or tax advice.
What BOQ format does this generator follow for the UK?
NRM1/NRM2 (part of the RICS New Rules of Measurement suite) — the current UK standard for bills of quantities and elemental cost planning, replacing the older SMM7. Category numbering (1 Substructure through 8 External Works) follows the same real convention UK quantity surveyors already use.
Does this generator include real UK brick, block or labor rates?
No — you get real quantities and price every line yourself in GBP. UK regional labor rates vary hugely (London and the Southeast run well above the rest of the country), which is exactly why a single national average would be dishonest — you enter your own real supplier and trade quotes.
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Generate a real United Kingdom BOQ, free

Real quantities calculated from your project's size and construction system — you price every line with your own GBP rates. No fabricated national average, no fake accuracy claim.

Free to start · No credit card required