What's actually inside your bill of quantities, and why you should be able to check every line

Hand a subcontractor a single lump sum and watch what happens. He can't check it, can't challenge it, and can't tell you which bit of his trade is under-priced until the job's already running. A number with no structure behind it isn't a price. It's a guess wearing a suit.

A proper bill of quantities doesn't hide the working. It shows it.

Element by element, not one big number

Under NRM2, the job gets broken into elements: substructure, frame, upper floors, roof, external walls, windows and doors, internal finishes, services, external works, and so on. Each element carries its own measured quantity and its own rate. That means when a subcontractor or a site manager wants to know what's allowed for brickwork or first fix electrics, the answer's sitting right there in its own line, not buried inside a total.

This matters more than it sounds like it should. A breakdown you can't interrogate is a breakdown you can't manage. When the groundworks package comes in higher than allowed, you want to know immediately which element absorbed it, not discover the shortfall three valuations later.

Why the structure protects you at variation stage

The other reason a proper element breakdown earns its keep is variations. When a change comes through mid-contract, whether it's an instruction or something uncovered on site, you need to price the difference against a known baseline. If your original number was one lump figure, you're arguing from nothing. If it was measured and broken down element by element, you point straight at the line that's changed and price the delta against it. That's a much stronger position to be arguing a variation from, and it's the difference between a fair uplift and a fight.

A breakdown built to be checked

We measure every job to NRM2, element by element, so what lands in your inbox is a bill you can actually read against the drawings, not a total you have to take on faith. Every quantity's there, every rate's there, and every line is something you or your site team can question before you commit to a number.

Send your drawings and we'll build the breakdown properly, priced against current UK rates. See a sample estimate to see exactly what the structure looks like before you commit to anything.

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