Construction Drawing Markup Software
ContractorCounter gives contractors a focused markup workspace for reviewing construction drawings, adding context, checking measurements, tracking counts, and exporting clear PDFs.
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01
Mark up the drawing where the work happens
Add callouts, arrows, text, stamps, highlights, and comments directly on construction PDFs so every note stays tied to the plan.
02
Measure and count with context
Calibrate scale, measure lengths and areas, and place count marks while the review is still visible on the sheet.
03
Export clean review evidence
Share marked-up drawings with clients, field teams, and estimating workflows without turning review notes into scattered screenshots.
04
See a real markup on this page
The demo workspace above runs on a real sample floor plan. Let the guided tour play and it places an actual leader-line callout on the entry door's swing — the leader tip anchored to the door geometry, the note floating clear of the plan linework — which is the anatomy of a useful drawing markup: the comment is readable without covering what it comments on. Ask the assistant to "count the doors" and 5 numbered markers land on the same sheet. Everything you see is the production markup engine, not a mockup, and it works before you sign up.
05
Review rounds that survive mistakes
A markup round is only as good as your ability to unwind it. Every change lands in the workspace activity log with who did what, markups save automatically seconds after you stop drawing, and snapshots preserve the state before a round so a bad review pass is a restore, not a redo. Real-time sharing means the reviewer watches markups appear with named live cursors instead of waiting for an emailed PDF.
Common questions
Questions about Drawing markup software
What is construction drawing markup software?
It is software for adding annotations, measurements, comments, stamps, and count marks directly to construction drawings, usually PDFs. The distinguishing features against a generic PDF editor are construction-specific: scale calibration so measurements read in real units, count groups for symbols, and exports that keep the markups tied to the sheet they annotate.
Can my team mark up the same drawings at the same time?
Yes. Share a workspace by email invite or a copyable link and work on the same drawings together in real time — you can see who else is in the workspace, follow their live cursors on the sheet, and markups appear for everyone within seconds. Sharing is included on every paid plan and when you try for free; there is no separate collaboration product or session setup, and collaborators just need a browser.
Is ContractorCounter only for estimating?
ContractorCounter is focused on drawing markup, PDF annotation, calibrated measurement, counts, stamps, comments, and clean exports. Estimating can happen after the markup work is clear.
Does it work in the browser?
Yes: ContractorCounter is fully browser-based, which means it runs on Windows, macOS, and iPad without an installer, a Windows-only desktop dependency, or a virtual-machine workaround for Mac users. Upload PDF or image drawings, calibrate the scale once per sheet, and the full markup, measurement, and counting workflow runs in the tab, at the desk or on site. Because the workspace lives in the browser, the same drawing opens identically on every machine, so the office and the field are always looking at the same markups without anyone syncing files or matching software versions. If your team has been locked out of desktop-first tools on Mac or iPad, this is the structural difference to test first.
