How much does a quantity surveyor cost in the UK?

If you've ever asked a quantity surveyor to price a job, you'll know the bill can be eye-watering. Here's what a QS actually costs in the UK in 2026 — and how smaller builders are getting the same job priced for a fraction of it.

The short answer

A quantity surveyor in the UK typically charges in one of three ways: a day rate of roughly £300–£600, a percentage of the build cost (often 1–3%), or a fixed fee per job that usually lands somewhere between £800 and £1,500 for a single residential project. On a larger or commercial job, fees run well into the thousands.

Why quantity surveyors cost what they do

A QS is a skilled professional who measures your drawings, works out exact quantities of every material and labour item, applies current rates, and produces a priced Bill of Quantities. It's detailed, technical work — and it's why most sole traders and small builders never hire one. The cost simply doesn't stack up against a single job's margin.

When you actually need a QS

• Tendering for bigger work — when the job's too large to price on gut feel.
• Fixed-price contracts — where getting the price wrong comes straight out of your pocket.
• Anything with a client who'll challenge the numbers — a proper BOQ protects you.

The problem for small builders

Here's the catch. The builders who most need accurate pricing — the ones without a QS on staff — are exactly the ones who can't justify £1,000+ per job. So they price on a hunch. And pricing on a hunch is how you either lose the job by going too high, or win it and lose money by going too low.

The cheaper alternative: AI quantity surveying

This is where things have changed. AI-powered quantity surveying does the same core job — drawings in, priced Bill of Quantities out — for a fraction of the cost and in a fraction of the time.

With AI Trades Pilot, you upload your drawings and get a priced BOQ back the same working day, built on rates from real contractor invoices — and trained on your own rates once you upload your invoices. For most small builders, that's the difference between pricing every job properly and pricing none of them properly.

The bottom line

A quantity surveyor is worth every penny on the right job — but for the everyday jobs a small builder runs, paying £1,000+ a time isn't realistic. AI quantity surveying gives you the same priced, professional output without the QS bill, so you can price with confidence on every job, not just the big ones.