Ask five contractors what a takeoff is and you'll get five different answers, most of them close enough, but nobody quite says it in one sentence. So here it is plainly. What is a takeoff in construction? It's the measured list of everything in the job, taken off the drawings, item by item, before a single price gets put against it.
Concrete volumes. Blockwork by the square metre. Linear metres of drainage. Doors, windows, first fix, second fix, external works, the lot. Measured, not guessed. Only once that list exists does anyone start putting rates against it, and the order matters more than it sounds.
What is a takeoff in construction made of
A takeoff is a set of quantities, each with a description and a unit. The units matter because they decide how each item gets priced:
- Cubic metres. Excavation, concrete in foundations and slabs, hardcore fill. Anything with volume.
- Square metres. Walls, floors, ceilings, roof coverings, plaster, paint, insulation. Anything with area.
- Linear metres. Drainage runs, skirting, guttering, lintels where priced by length, kerbs. Anything measured along its length.
- Numbers. Doors, windows, manholes, sanitaryware, light fittings. Anything you count.
- Items. Things priced as a whole, like a connection to an existing sewer, where a quantity doesn't make sense.
In the UK, a proper takeoff for building work is usually measured to NRM2, the RICS rules for detailed measurement. That sets out what gets measured, in which units, and how, so the list comes out in a recognised order anyone in the industry can read.
You'll also hear "material takeoff", which is the same idea pointed at ordering rather than pricing: quantities of bricks, blocks, timber and board that a supplier can quote from. If that's what you're after, there's more on material takeoffs you can actually order from.
Why it's the base of every number you bid
Your estimate is only as good as the quantities underneath it. If the takeoff says 40 square metres of blockwork when the drawing actually shows 55, your price is wrong before you've even applied a rate to it. That's 15 square metres, over a third more than you allowed, missing from the price, along with the mortar, the ties, the labour and the time. Get the quantities right and the rest of the pricing follows. Get them wrong and no amount of careful rate setting saves the bid.
That's why a rushed takeoff, done at speed the night before a bid's due, tends to cost more than the time it saved. A missed run of first fix or an under-measured quantity doesn't show up until the job's on site and the material order comes in short.
Rates decide what each thing costs. The takeoff decides how many things there are. Get the second one wrong and the first one can't help you.
Where takeoffs usually go wrong
Most errors aren't bad maths. They're things left out or counted twice:
- Missing a drawing. Measuring from the plans and missing a detail sheet that changes the foundation depth or adds a steel.
- Not deducting openings. Or deducting them and then forgetting the lintels, cavity closers and reveals that come with them.
- Measuring to the wrong face. Internal dimensions for one element and external for the next, so the corners go astray.
- Losing the small items. Airbricks, DPCs, trays, fire stopping. Tiny individually, noticeable together.
- Double counting. Measuring the same wall on the plan and again on the elevation.
A disciplined takeoff marks up the drawings as it goes, so every measured area is visible and anything unmarked stands out. It also keeps a note of every query and assumption, because the drawings rarely answer every question on their own.
That trail is the best answer if someone on your team asks what is a takeoff in construction and why it takes so long. Hand them the marked-up sheets. Every coloured area, every counted item and every note in the margin is a line in the price that won't be missing when the materials get ordered. Compare that with a figure scaled off the plan in ten minutes and the difference in what you can trust is obvious.
How we do it
We measure the job off your drawings to NRM2, so every element is accounted for in a consistent, recognised way, not a rough guess dressed up as a number. You send the drawings you've got, plans or sketches, and we take off every element and price it on current UK rates, local to the job. You get the full priced estimate back before your bid is due, built from quantities that were actually measured rather than estimated by eye, for a fixed fee agreed before we start.
Why it matters even on smaller jobs
It's tempting to skip a proper takeoff on a smaller job and price it by feel instead. That's fine when the feel is right. It's expensive when it isn't, and there's no way to tell which one you've got until the job's running and the numbers don't add up. On a small job the margin is often tighter, so one missed element takes a bigger share of it.
A takeoff isn't a formality that sits between the drawings and the bid. It's the thing that makes the bid correct in the first place.
A quick check on your own takeoffs
Take the last job you priced and pick one element, say the external walls. Could you show someone exactly where on the drawings each square metre came from? If you can, your takeoff's doing its job. If the figure came from memory or a quick scale of the plan, that's the gap between knowing what a takeoff in construction is and actually having one.