Differences Between SMM7 and RICS NRM2.
SMM7 (Standard Method of Measurement, 7th Edition) was replaced by RICS NRM2 (New Rules of Measurement 2) to provide clearer, modern rules for measuring building works, aligning cost planning with modern procurement methods.
Authored by Alexandr Vreme | Reviewed by Maksym Vasylkov
Published — Next review
Who this guide is for
Quantity surveyors, estimators, and contract administrators. Scope: UK-wide.
Key Structural Changes
NRM2 replaced SMM7 to streamline work breakdown structures and better accommodate modern off-site fabrication, digital CAD/BIM take-offs, and clear preliminary cost separation.
- Work Breakdown: NRM2 categorizes work by 41 detailed work sections aligning with trade packages.
- Preliminaries: NRM2 provides a comprehensive framework for site specific prelims vs main contractor management overheads.
Miniature Example
When transitioning legacy company pricing schedules from SMM7 to NRM2, an estimating department reclassifies masonry items into NRM2 Work Section 14 (Masonry), ensuring standardized trade subcontract packages.
Primary Sources & Further Reading
Official reference sources: GOV.UK Building Regulations, Legislation.gov.uk, and HSE CDM 2015 Guidance.
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