What is a quantity surveyor — and what is NRM2?

The role behind accurate construction costs, explained in plain English

Buildcostr.ai · June 2026 · 5 min read

What a quantity surveyor does

A quantity surveyor (QS) is the construction industry's cost specialist. They measure the work in a project, price it accurately, and manage costs from the first estimate through to the final account. They protect the budget the way an accountant protects the books — making sure what gets built matches what was priced.

What is NRM2?

NRM2 stands for the New Rules of Measurement 2, published by the Royal Institution of Chartered Surveyors (RICS). It is the standard set of rules for measuring and describing building works in the UK. Because everyone measures the same way, costs become consistent, comparable and far harder to fudge.

Why measurement matters

Two people pricing the same job from gut feel will reach two different numbers. A measured take-off — counting the actual quantities of every material and task from the drawings — removes the guesswork. It is the difference between a vague "about £50,000" and a line-by-line figure you can hold a builder to.

Cost plan vs bill of quantities

A cost plan is an early-stage, section-by-section estimate used to set and manage a budget. A bill of quantities (BoQ) is a detailed, formal schedule of every item of work, used for tendering and contracts. A cost plan tells you what the project should cost; a BoQ tells contractors exactly what to price.

What is BCIS data?

BCIS is the Building Cost Information Service, the RICS database of real construction costs gathered from projects across the UK. Professional cost plans are cross-checked against BCIS benchmarks so the figures reflect what things actually cost, not what someone hopes they will.

How Buildcostr.ai uses this

Buildcostr.ai applies the same NRM2 measurement logic and BCIS-calibrated rates a quantity surveyor would use — and delivers the result in 30 minutes instead of weeks. See a sample cost plan or order yours now.

Putting this into practice? Read how to read a builder's quote and use your cost plan as the benchmark.