Where NRM1 focuses on early-stage order of cost estimating, NRM2 — the New Rules of Measurement Volume 2 — provides the rules for the detailed measurement and description of construction works. It is the standard for bills of quantities, schedules of works, and detailed pricing documents. Used well, it is not just a measurement standard — it is a platform for rigorous cost benchmarking at the trade and work-section level.

The Shift from Elemental to Measured

As a project moves from concept through to procurement, cost planning shifts from elemental (NRM1) to measured (NRM2). Instead of allocating a lump sum to the structural frame, you are now pricing specific quantities of in-situ concrete, formwork, and reinforcement. Instead of a cost per square metre for mechanical services, you have measured lengths of pipework, numbers of terminal units, and hours of commissioning.

This shift in granularity is where the real benchmarking opportunity lies. At the NRM2 level, you can compare like-for-like rates across projects with much greater precision. What did you pay per tonne of rebar on this project versus the last? How does your concrete rate compare to market? Are your M&E preliminaries consistent with your overall project size? These are the questions that separate firms with genuine cost intelligence from those flying blind.

Building a Rate Library

A rate library built on NRM2-structured data is one of the most valuable assets a construction firm can own. It is a repository of validated, project-tested unit rates — for labour, materials and plant — organised by work section and updated over time. When an estimator builds a new bill, they draw from this library rather than starting from scratch. Rates are anchored in actual project performance, not industry publications or gut feel.

The quality of a rate library depends entirely on the quality of the data that feeds it. This is where data governance and NRM2 intersect. If rates are captured inconsistently — different teams using different measurement conventions, different inclusions in each rate, different approaches to preliminaries allocation — the library becomes unreliable. Consistent NRM2 measurement rules ensure that rates are genuinely comparable and can be aggregated meaningfully.

Composite Rates and the Cost Breakdown Structure

One of the most practical applications of NRM2 data is the development of composite rates — all-inclusive rates for defined work items that combine labour, materials, plant and subcontractor costs into a single figure. A composite rate for, say, 200mm thick reinforced concrete suspended slab includes the concrete, formwork, reinforcement, finishing and associated plant. It is the rate an experienced estimator reaches for first.

When composite rates are organised within a clear Cost Breakdown Structure — aligned to NRM2 work sections — they become the building blocks of rapid, consistent estimation. New projects can be priced quickly by selecting the appropriate composite rates and adjusting for project-specific factors. Over time, as more projects are completed and rates are updated, the library becomes more accurate and more valuable.

The Benchmarking Insight

The most powerful insight from NRM2-based benchmarking is understanding where your cost variability lies. Some trades will be consistently priced within a narrow range across all your projects. Others will show significant variation — and that variation is worth investigating. Is it driven by specification differences? Market conditions? Procurement approach? Subcontractor performance? When you can see it clearly, you can manage it deliberately. That is the difference between firms that react to cost outcomes and firms that engineer them.