AI takeoff software that takes off the whole set

So what does AI takeoff software actually do?

You're after AI takeoff software, and every tool you look at says it's got AI now. Which one actually does the takeoff, though? Fair question, because from the outside it's hard to tell.

Here's our answer up front. The AI takeoff software worth paying for does the takeoff itself. And for a builder pricing from PDF drawings, we think that's Estimator+.

AI takeoff software uses AI to measure quantities from construction drawings: counts, lengths, areas, volumes and tonnes. Where products differ is how much of that work the AI does, and what happens to the result.

Buildsoft's AI Estimating add-on gives a Cubit estimator four tools, among them Count Symbols, to "Rapidly find and count symbols on your plan". PlanSwift's Core plan adds Auto Takeoff, "the AI tool that builds a first-pass takeoff for areas, lengths, and counts". Estimator+ works differently. It takes off the whole set, reads it against the schedules and the current revision, and puts every line in the tender you submit.

Why the schedules matter as much as the plans

You know the feeling. A plan full of door tags and finish codes is half a takeoff. A door tag or a finish code doesn't mean much to a subbie until the schedule says what product sits behind it.

So the takeoff starts from the schedules. Each code is looked up, any code nobody defined gets flagged, which is a lot nicer to find now than on close day, and each line is named from what the schedule says.

That way your subcontractors price the product the schedule describes, instead of a bare code. A question the client alone can answer is raised as an RFI, so it gets asked before close rather than argued about after award.

What happens when the addendum lands?

Picture it's Thursday and the addendum just landed. Honestly, this is where a takeoff usually gets messy.

In Estimator+, each revised sheet takes the old sheet's place, and the old one sits underneath it. The takeoff reads the current set and leaves superseded sheets out, so the AI never measures Rev B and Rev C of the same sheet. Anyone who's double-counted a revision knows why that matters.

Your measurements and the scale carry over to the revised sheet. You flick between old and new, see what changed, and redraw just the shapes it touches. So in that last week before close, an addendum costs you its changes. You're not starting a second takeoff.

Why you can trust the numbers

This is the bit we care about most. Nothing in the takeoff is a typed-in total. Every light and door gets a dot, every partition a line and every floor finish an outline, and the counts, lengths and areas come from those shapes at the sheet's printed scale.

And where the drawing prints a size, the line uses that size.

Quick example, and the figures below are illustrative. A partition run of 18.4 m with a printed height of 2,700 mm becomes 18.4 × 2.7 = 49.68 m² of wall. Same partition type but 2,400 mm high? That goes on a line of its own.

Steel works the same way. A run of 36 m of 200UB25.4 becomes 36 × 25.4 = 914.4 kg, or 0.914 t. And if a steel section can't be matched exactly, it's left for you. It never guesses.

Every quantity sits on shapes you can see. A count of 64 is 64 dots on the drawings, so an invented number has nowhere to come from. Which is kind of the whole point. Can ChatGPT do a takeoff? goes into why that matters more than which model is doing the reading.

So where does the takeoff end up?

Right in the job. It isn't a file you export and carry somewhere else. Its lines go straight into the takeoff panel of the live tender, where your team's already working, and each shape shows up on every screen as it lands.

On the Quotes tab, each subcontractor's price sits beside the line it covers. A rate follows the measured quantity, and a fixed total stays as the sub quoted it. Nobody's re-keying numbers from a takeoff file into a pricing workbook at 10pm.

So when a quantity changes during the check, every rate priced against it moves with it. There's no second copy of the takeoff for the price to fall behind.

Who checks the AI's work?

Two lots of checking, really. When the marking's done, the AI tidies up any duplicate lines and checks the finished takeoff against the drawings before it reports to you.

And then there's you. You check it the way you'd check a colleague's takeoff. Every line the AI made is marked as the AI's, and review mode writes each shape's line name beside it on the sheet, so you're not hunting. Spot something wrong? Delete it or redraw it.

That leaves your estimator's hours for the work that actually needs an estimator: the check, the quotes and the price.

The catch: what it leaves to you

The takeoff stops at measuring, and that's on purpose. These stay yours:

• Prices. It prices nothing unless you ask, and a rate goes in from a printed document, from you, or from a rate pass you asked for, and from nowhere else.
• Quote picks. It can file a quote, which moves the tender total by nothing until you pick it.
• Margin. It never sets one.
• Deductions and clarifications. A partition run goes straight through the doors, and the AI writes no clarifications or exclusions.
• Your lines. Shapes and lines your team drew stay as they are.

A couple of practical bits too. The takeoff runs in Claude Code or Codex, on the Claude or ChatGPT plan you already pay for, and we charge no AI credits. It works from PDF drawings, so if you price from BIM models, fair enough, keep your model-based tool for that work.

Want to see it? Bring a set you've already priced to a demo and compare the AI's takeoff with yours, line by line. That's how we'd want to judge it too.