My Project Estimating · Cost Planning
You win the job on a number you priced weeks or months earlier. Then the job runs, variations turn up, the site's never quite what the drawings showed, and by valuation four nobody's entirely sure whether you're still inside the budget you priced or how far outside it you've drifted. That gap is where jobs quietly lose money.
The budget you're managing on site is only as good as the estimate it came from. If the original quantities were measured properly against the drawings, you've got a real baseline to check progress against. If they were guessed under pressure before the bid, you're managing against a number that was never right in the first place, and every valuation after that is chasing a moving target.
Every variation needs pricing against the same rates and the same measured approach as the original bid, not a rough figure agreed on site and sorted out later. Every valuation should be checked back against what was actually measured and priced at tender stage, so you can see exactly where the job's ahead or behind, rather than a general sense that "it feels tight."
The contractors who keep control of a budget aren't the ones with the fewest problems on site. They're the ones who can point to the original measured numbers and show precisely what's changed and why.
It usually goes wrong at the beginning, not the end. A takeoff done at speed the night before a bid was due, a quantity rounded off because there wasn't time to check the drawing properly, an item missed entirely. None of that shows up until three months into the job when the budget's tighter than it should be and nobody can point to why.
Send us the drawings at tender stage and we measure the job to NRM2 and price it on current UK rates, so the number you carry onto site is one you can actually manage against. Every valuation and variation after that has something real underneath it to be checked against, instead of a guess nobody can defend.
Send your drawings before the next bid, and start the job with a budget you can actually hold the line on.
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