You've got three sets of drawings on the kitchen table, a tender due Thursday and a site that needs you at half seven tomorrow. Someone at the merchants said you should get a QS. Someone else said a QS is overkill for a firm your size. Both have a point. This is a straight look at taking on a quantity surveyor for small builders' work against using an estimating service job by job, including the parts where a QS does things an estimator simply doesn't.
What a quantity surveyor actually does on a job
The title gets used loosely. Plenty of people call anyone who measures drawings a QS. But a quantity surveyor's work usually runs across the whole life of a project, not just the pricing stage.
Before the job, they measure and price. That part overlaps with estimating. Once the contract is signed, though, a QS is doing a different kind of work:
- Interim valuations. Measuring what's been built each period so you can apply for payment, then agreeing it with the client's side.
- Variations. Pricing the changes the client or architect asks for once you're on site, and making the case for the money.
- Final accounts. Pulling the whole job together at the end (contract sum, plus and minus everything that changed) and getting it agreed.
- Contract advice. Reading the JCT or whatever form you've been handed, spotting the clauses that shift risk onto you, and dealing with payment notices.
That post-contract side is where a good QS earns their keep, and it's the strongest case for a quantity surveyor for small builders who run jobs with lots of change. If your stage payments keep getting cut, or a final account has dragged on for months, that's QS work. An estimator won't do it for you, and shouldn't pretend to.
What an estimating service does, and where it stops
An estimating service sits at the front of the job. You send the drawings. It sends back measured quantities and a priced estimate you can tender from. That's the scope.
At MPE that means every element measured off your drawings to NRM2, priced on current UK rates local to the job, for a fixed fee agreed before any work starts. It's delivered to your tender deadline through the client portal. If you're also weighing up a one-person operation, we've covered the difference between a freelance estimator and an estimating service separately.
What it doesn't do: valuations, variations, final accounts. Once you've won the job, the estimate becomes your baseline (a useful one, because every quantity can be traced back to a drawing), but running the money on site is still down to you or a QS.
So the two aren't really rivals. They overlap on one stage, the pricing, and then go their separate ways.
The cost of a quantity surveyor for small builders
This is the part most small firms are really asking about.
A QS on the payroll means a salary, pension, a vehicle or allowance, software and a desk. That cost is there in the quiet months when you're pricing nothing, and it doesn't stretch in the busy months when one person can't keep up. For a builder running a handful of jobs a year, keeping a full-time QS busy enough to pay for themselves is hard.
A freelance or consultant QS gets round the payroll problem. You pay for their time when you need it, and that can work well, especially for post-contract help on one awkward job. The catch tends to be availability (the good ones are busy) and billing by the hour or day, which makes it hard to know what a tender will cost you until the invoice turns up.
A per-job estimating service is paid per set of drawings. Fixed fee, agreed up front. No job, no cost. That suits a firm whose pricing workload rises and falls with the enquiries, which describes a lot of small building firms. It's why our building estimating services for UK builders are built around the jobs you send rather than a retainer.
Which one fits your firm
You mostly need help winning work
If the pinch point is getting accurate prices out of the door, the problem sits at tender stage. You're pricing at night. Lines get missed. You lose bids you should have won, or win ones you priced too low. An estimating service fixes that stage directly, and there's more on it in construction estimating for small builders without an estimator on the books.
You mostly need help getting paid
If you're winning enough work but losing money after it starts, on unagreed variations or underpaid valuations or final accounts that never close, you need QS support. An estimate won't recover money that's already in dispute.
You need both
Plenty of growing firms do. A common setup is an estimating service for builders at tender stage, with a consultant QS brought in for the post-contract side on bigger or contract-heavy jobs. The measured estimate then hands the QS a clean starting point, because the quantities behind your tender figure are already set out element by element.
What to check before you pay anyone
Whoever you use, ask to see a real example of what comes back. If it's a total with a few headings, walk away. You want measured quantities you can check against the drawings, rates you can question, and a clear list of what's included and what's been assumed. You can look through a sample estimate to see the level of detail we work to.
Ask how the fee is set. Hourly makes sense for open-ended QS work, where nobody knows how long a final account will take. For pricing a set of drawings, a fixed fee agreed before work starts is fairer to both sides.
Ask whether they measure to a recognised standard. NRM2 matters because the quantities get built the same way every time, so anyone checking them (your client's QS included) is reading the same language.
Then be honest about what you're short of. Lots of builders think they need a QS when what they're really missing is a free evening to measure a job properly. Others expect an estimator to sort out a cash flow problem that's actually about unpaid variations. Work out which one it is and the choice mostly makes itself. If you want the wider argument for handing your pricing to an estimator instead of doing it at midnight, that post covers the tender side in more depth.
Whichever way you go, get the pricing measured properly. It's the number every other figure on the job hangs off.