There's a trap every contractor knows. Price the job too high and you lose it to someone cheaper. Price it too low and you win it, then bleed money for the next six months. Somewhere in the middle is the right number, and when you're pricing off gut feel, you're guessing where that middle is. Knowing how to price a construction job properly is really about taking the guessing out.
Guessing works until it doesn't. You win a run of jobs on instinct and think you've got the knack, then one comes in that eats you alive, and you realise the last few were luck as much as judgement.
Why gut-feel pricing goes wrong
Your instinct is built on the jobs you've done before. The trouble is no two jobs price the same. A different site, a different spec, a change in material prices, and the rate you carried in your head last year is out.
When you guess, you're really doing two risky things at once. You're guessing the quantities, how much of everything the job actually needs, and you're guessing the rates, what each of those things costs today. Get either wrong and your number's wrong, and you won't know until it's too late to change it.
That's how good contractors lose bids they should have won, and win jobs they'd have been better off losing.
A price is quantity times rate. Guess both and you haven't priced the job, you've placed a bet on it.
How to price a construction job, step by step
The way out is to stop guessing both halves. Every sound price follows roughly the same build-up, whatever the size of the job.
- Read the whole scope. Drawings, specification, tender documents and addenda. You can't price what you haven't read.
- Measure the quantities. Take every element off the drawings, trade by trade, so you know how much of everything the job needs.
- Build up the rates. For each item, work out labour, materials and plant at today's prices, not last year's.
- Add subcontract packages. Get quotes for the trades you don't do yourself, ideally against the same measured scope.
- Price the preliminaries. Site set-up, scaffold, welfare, skips, supervision and the time on site.
- Add overheads, risk and margin. Decide these deliberately, as separate lines you can see, not buried in the rates.
- Sense check the total. Compare it against similar jobs you've done. If it's far off, find out why before you submit.
None of these steps is complicated on its own. The discipline is doing all of them every time, on every job, including the small ones where it feels quicker to go with your instinct. Those are often the jobs where a missed item hurts most, because there's so little margin to absorb it.
Steps two and three are where gut-feel pricing cuts corners. They're also where most of the risk sits.
Measured quantities and proper rates, not a hunch
We measure every element off your drawings, so the quantities are actual measured quantities, not a rough idea of how much you'll need. Then we price them on current UK rates local to the job, rates that reflect what the work costs now, not a number from a job three years ago.
Rates matter as much as quantities. The cost of labour varies across the country, and so does the cost of getting materials to site. A rate that's right for one region can be well off in another. Pricing local to the job closes that gap.
You end up with a tender price that's built from the job in front of you, line by line. It's competitive because it's accurate, not because you've shaved it and hoped. And it's a number you can stand behind when the client asks how you got to it.
A number you can defend in the room
At some point a client or main contractor will ask you to explain your price. Maybe they've had a cheaper quote. Maybe they just want to understand it.
With a guessed number, that conversation is uncomfortable. You can say it's what the job costs, but you can't show them. With a measured, itemised price you can walk them through it: here's the brickwork, here's the quantity, here's the rate. If the other quote is cheaper, you can ask what it leaves out. Often the answer is quite a lot.
That also puts you in a better position if you do decide to sharpen the price. You know exactly where the margin is and what you're giving away, rather than knocking a round figure off the bottom and hoping.
Bid with confidence, win the right jobs
This is what construction estimating services do for you. You go into the tender knowing your number is real. You're not the outfit that's too high and never hears back, and you're not the one that wins on a price that turns out to be a loss. You still make the calls on margin and risk. The difference is you're making them on top of a number that's been measured, rather than on top of another guess. We've set out our own build-up in more detail in how we build up a price for a job.
You win the jobs that are worth winning, at a price that leaves you your margin. Send your drawings for a fixed fee quote, agreed before we start, and the priced estimate comes back in time for your tender deadline.
A simple test before you submit
Pick three lines at random from your price and ask where each quantity and each rate came from. If the answer is "measured off drawing 102" and "current supplier price", you know how to price a construction job and you've done it. If it's "that's what it usually is", you're still guessing.