Construction Takeoff vs. Estimate: What Illinois Subcontractors Need
By the Illinois Construction Estimators estimating team. Published October 24, 2026. 7 min read.
A construction takeoff measures how much material and work the drawings call for. An estimate turns those quantities into a price, adding material cost, labor, equipment, overhead and profit. If you already know your own unit costs, a takeoff is often all you need.
What a quantity takeoff is
A quantity takeoff counts and measures every item on the plans. Each trade uses its own units:
| Trade | Typical units | Example items |
|---|---|---|
| Concrete | Cubic yards (CY) | Footings, walls, slabs |
| Reinforcing steel | Tons (TN) or pounds | Rebar by bar size |
| Masonry | Square feet (SF) | CMU, brick veneer |
| Drywall and framing | Square feet and linear feet (LF) | Board, studs, track |
| Electrical | Each (EA) and linear feet | Devices, fixtures, conduit, wire |
| Sitework | Cubic yards and square yards | Cut and fill, paving |
Professional takeoffs today are done digitally in tools such as Bluebeam Revu or PlanSwift, and organized by the 50 divisions of the Construction Specifications Institute’s MasterFormat. The estimator traces each item on the PDF drawings, and the software measures it. The result is a list of quantities plus marked-up sheets that show exactly where every number came from.
What an estimate adds
An estimate starts with the takeoff and prices it. That means:
- Material cost from current supplier pricing for your region
- Labor hours from production rates, multiplied by the right labor rate
- Equipment such as lifts, pumps and cranes
- General conditions: supervision, temporary facilities, permits
- Overhead and profit
For Illinois public work, labor must be priced at the Illinois Department of Labor prevailing wage for the project’s county (see our prevailing wage guide). In Chicago, many bids also require union rates. These labor decisions are often what separates a winning estimate from a losing one.
Side-by-side comparison
| Takeoff | Estimate | |
|---|---|---|
| Quantities | Yes | Yes |
| Material pricing | No | Yes |
| Labor hours and rates | No | Yes |
| Overhead and profit | No | Yes |
| Ready to submit as a bid | After you price it | Yes |
| Our starting fee | $149 | $399 |
Which one to order
Order a takeoff when you price your own trade every week, have unit costs from past jobs, and get your own supplier quotes. Most subcontractors fall here for their core scope.
Order a full estimate when you’re bidding outside your usual market, on prevailing wage work, in a trade you don’t price often, or when you’re a general contractor who needs every trade covered.
You can also start with a takeoff and upgrade later. We keep the quantities, so adding pricing doesn’t mean starting over.
How to check a takeoff
A takeoff is only useful if you can trust it. Before you price one, check:
- Every quantity is marked on a plan sheet you can open
- Quantities are split by area, floor or system, not one lump number
- Waste factors are shown separately, so you can set your own
- Items are organized by CSI MasterFormat division
- The latest addenda are included, with the revision date noted
Common takeoff mistakes by trade
Even experienced estimators make the same errors under bid-day pressure. These are the ones we check for most often:
| Trade | Common mistake | How to catch it |
|---|---|---|
| Concrete | Missing thickened slab edges and pier caps | Check structural sections, not just the foundation plan |
| Rebar | Forgetting laps, dowels and corner bars | Read the general structural notes for lap lengths |
| Masonry | Not deducting openings, or deducting them twice | Mark openings on the elevations as you count |
| Drywall | Counting one side of a two-sided wall | Count by wall type from the partition schedule |
| Electrical | Missing devices shown only on enlarged plans | Check every enlarged plan and detail sheet |
| Sitework | Ignoring topsoil strip and replacement | Read the grading notes and geotechnical report |
Illinois winters add their own checks. Footing depth, frost protection and cold-weather concrete measures are set by the drawings and the local code, so read the structural notes before you count foundations.
What to send for an accurate takeoff
The more complete the package, the faster and more accurate the takeoff. Send:
- The full drawing set as PDFs, including structural, MEP and civil sheets
- The project manual or specifications for your trade
- Every addendum issued so far, with dates
- Your bid form or schedule of values, if the owner provided one
- Any scope letter from the general contractor that defines your package
- Your preferred waste factors and units, if you have them
If you only have a plan room link, send that. We will pull the documents and confirm what we found before we start.
Digital vs. manual takeoff
Some contractors still measure paper plans with a scale ruler and a highlighter. It works, but it is slow, and the results are hard to check or revise.
Digital takeoff on PDF drawings has three practical advantages:
- Speed. Areas and lengths are measured with clicks instead of by hand, and repeated items are counted in groups.
- Traceability. Every quantity stays linked to a colored markup on the sheet, so anyone on your team can check it.
- Revisions. When an addendum changes a sheet, the estimator compares the old and new versions and updates only what moved.
The one thing digital tools can’t fix is a bad scale. Always confirm the scale on each sheet, especially on details and enlarged plans, before measuring anything. A single wrong scale can throw off a whole floor’s quantities.
How quantities become labor hours
The takeoff is also where labor cost starts. An estimator multiplies each quantity by a production rate, the number of units a crew installs per hour or per day, to get labor hours. Those hours are then priced at the right wage.
For example, if your drywall crew hangs a known number of square feet per hour on standard walls, the takeoff quantity divided by that rate gives the hours. High walls, curved walls and soffits install slower, which is why a good takeoff separates them instead of lumping all board together.
This is the point where your own experience matters most. If you track production on past jobs, use those rates. If you don’t, a full estimate from someone who prices that trade every week is the safer choice.
Frequently asked questions
A takeoff lists quantities from the drawings. An estimate prices those quantities with material, labor, equipment, overhead and profit.
Bluebeam Revu and PlanSwift, with On-Screen Takeoff on request. Deliverables come in Excel with marked-up PDFs.
Yes. We keep your quantities and add pricing, so you pay only for the pricing work.
Most single-trade takeoffs are delivered in 24 to 48 hours from complete plans.
Our Illinois construction takeoff services cover every trade, delivered in Excel with marked-up plans. See a sample takeoff first, or find your city on our areas we serve page.
Related: How Much Does Construction Estimating Cost in Illinois? (2026). Subcontractors in Joliet, Rockford and Bloomington-Normal send us takeoffs every week.