Quantity Surveying & Standards · · 6 min read
RICS NRM2 Quantity Takeoff Checklist for Accurate UK Contractor Tenders
Why separating demolition, temporary works, net measured items, and transparent waste factors prevents margin erosion between tender award and final account.
Why Generic Lump-Sum Spreadsheets Lose UK Tenders
Across competitive JCT Design & Build and Traditional UK tenders, contractors lose work either by padding unmeasured uncertainty or win work at unsustainable margins because wall heights, service risers, or foundation depth bands were glossed over.
Structuring every takeoff around RICS New Rules of Measurement (NRM2) work sections allows commercial teams to split clean trade packages instantly for brickwork, drylining, roofing, steelwork, and M&E subcontractor pricing.
Core Separation Rules Before Pricing
A defensible bill of quantities keeps net geometry crisp and forces risk assumptions onto visible lines rather than hiding them inside composite square-metre rates:
- Demolition & Alterations (NRM2 Sections 3–4): Itemise breakouts, Acrow propping, needle beams, and segregated skip waste away from new fabric.
- Excavation Depth Bands (NRM2 Section 5): Break trenches and basement digs into 1m/2m/4m depth steps with soil bulking factors shown clearly.
- Opening Deductions: Keep gross vs net areas transparent alongside reveal closures, lintels, and sill returns.
- M&E Builder’s Work: Log box-outs, fire collars, acoustic putty pads, and plantroom plinthes explicitly so interfaces are never double-counted or dropped.
Drawing Register & RFI Hygiene
Before locking a tender submission, compare RIBA Stage 4 architectural elevations against structural GA plans and door schedules. Highlighting mismatches—such as a fire door specified on the fire strategy that shows standard hardware on the door schedule—creates a sharp RFI log that protects your post-contract variation position.
Measurement & Deliverable Parameters
How does this guidance translate into RICS NRM2 takeoff practice?
| Estimating Parameter | Technical Specification | Standard / Audit Basis |
|---|---|---|
| Technical Focus | Quantity Surveying & Standards | Published 2026-10-18 (6 min read) |
| Measurement Alignment | RICS NRM1 / NRM2 & devolved UK Building Regulations | Scaled off 1:50 / 1:100 architectural and structural drawings in mm & m |
| Wastage & Workbook Rules | Net quantities + 5%–10% cutting waste · 100% open-formula Excel | Accepts CAD/BIM uploads up to 25 MB with RFI gap register |
Calibration note: 1:50 and 1:100 architectural and structural drawings are scaled to 25 mm masonry tolerances and 100 mm thermal zones, isolating 5 percent to 10 percent wastage from net quantities.
Frequently Asked Questions About This Topic
How does this guidance on quantity surveying & standards apply to UK Bills of Quantities?
Always map each measured BoQ line back to an exact drawing revision and grid reference. Our Excel BoQ sheets track quantities against scaled drawing references so contractors isolate tender risk upfront.
Can your estimating team verify our drawings for these specification details?
Yes. Upload PDF, DWG/DXF, IFC, or NBS specification files up to 25 MB via Request a Quote and we flag ambiguous items inside a formal RFI register alongside measured quantities.
Do we receive editable Excel workbooks after commissioning a takeoff?
Yes. Every pack issues as 100% open-formula Microsoft Excel schedules paired with colour-coded PDF verification overlays.