Guide · quantity takeoff services

Outsourcing takeoffs: 12 questions to ask before you send your drawings

Avo estimating team · Last checked against the sources below on 19 October 2026

Before you outsource a quantity takeoff, get the scope, drawing set, deliverable, fee and delivery date in writing, and check that every quantity will come back with the drawing it was measured from, the assumptions behind it and the questions the drawings leave open. If a provider can’t explain how they handle openings, wet areas and revisions, keep looking.

Takeoff, estimate or budget: know what you’re buying

A quantity takeoff is measured quantities — square metres of board, linear metres of cornice — with no rates. A priced estimate applies rates to those quantities. A preliminary budget is an indicative number for early decisions. Ask which one you are getting, because the price, the effort and what you can do with it are very different.

Quantities are only comparable when they are measured the same way. In Australia and New Zealand the reference method for measuring building works is the Australian and New Zealand Standard Method of Measurement (ANZSMM), available from the AIQS. A residential trade takeoff rarely follows it line for line, but a good provider can tell you the rules they do follow — for example, whether openings are deducted and from which face.

The 12 questions

Which drawings do you need, and which can’t you use? CAD-exported (vector) PDFs measure cleanly; scans often don’t.
Which trades and areas are in, and which are out? Garage, alfresco, porch and external soffits are the usual grey areas.
How are openings handled? Read from the door and window schedule, or estimated?
How are wet areas, voids and ceiling heights handled? These are where quantities go quietly wrong.
Will every line show the drawing sheet it came from? If not, you can’t check it.
How are assumptions and open questions (RFIs) reported? In writing, next to the quantities.
Who checks the quantities before they reach you?
What is the delivery date, and what happens if questions hold it up?
What happens when the drawings are revised? A full re-measure, or what changed?
What format do you deliver? It has to drop into your own estimate.
Where are the drawings stored, and who can see them?
What is the fee, what changes it, and how are corrections handled? Get it in writing before work starts.

Red flags

No written scope before work starts.
Quantities with no drawing references.
“Guaranteed accuracy” claims with no explanation of method.
No assumptions listed — someone still made them.
A fee you only find out after the work is done.

How to test a provider on a job you know

Give them a job you have already measured and priced. When the takeoff comes back, compare it line by line. Sort the differences into two piles: method (they deducted openings and you didn’t, or they measured one face of an architrave and you measured two) and errors (a room missed, a height wrong). Method differences are a conversation; errors tell you whether to trust them with a live tender.

Why the written scope matters later

Scope gaps become variations. For domestic building work in Queensland, the QBCC says a variation must be put to the home owner in writing and agreed in writing before the variation work starts, describing the change, its effect on the price and any delay. A takeoff that states its inclusions, exclusions and assumptions makes those conversations shorter, because everyone can see what was priced.