PDF Markup Software Built for Construction Drawings
Most PDF markup software was built for office documents. Construction drawings are a different animal — 200 MB scan sets, sheets with a scale, symbols that need counting, and markups that should become quantities. ContractorCounter is PDF markup software built for that reality, in the browser, for subbies and small teams.
Free account. No card required.
Exports and sharing require a paid plan or eligible card-required trial.
Explore the workspace
Every count stays on the drawing.
Click any tool to take over. This is the real workspace.
Sample drawing · scripted AI responses · changes stay in this preview. Reset clears your changes.
The short answer
Choose ContractorCounter if your PDFs are drawings and your markups should end as numbers: annotate, calibrate the scale, measure and count on the sheet, and carry the quantities into a priced estimate — from US$14/month on any platform with a browser. Choose a general PDF editor if you mostly edit text documents, or Bluebeam if your team lives in Studio Sessions and advanced PDF editing.
A closer look
01
Drawing markup, not document markup
Office PDF tools treat every page as paper. A drawing tool treats it as a sheet: clouds, callouts, arrows, text, and stamps that stay legible at drawing scale; layers you can lock; snapshots you can return to when a review round goes wrong; and an activity log that records who changed what. The everyday review loop — open the plan, mark the issue, share the sheet — stays fast because it is the whole design. Construction drawing markups explained covers what each markup type is actually for.
02
The markup that becomes a measurement
This is the line general PDF software never crosses. Calibrate the sheet once against a known dimension and every markup can carry a quantity: lengths along a wall, areas over a slab polygon, counts on repeated symbols. The AI agent can take the first pass — counting fixtures, measuring runs, setting the scale — with every mark reviewable before it commits.
03
And the measurement that becomes a quote
Marked-up quantities flow into a live Bill of Quantities, rates price it (yours, or AI-suggested with reasoning), and the result is a versioned quote — the full drawings-to-estimate chain in the same workspace. If you only need clean marked-up PDFs out, export them; but for a contractor, markup that stops at annotation is half the job.
04
Office, ute, and site — one workspace
The browser is the install. The same drawing set opens on the office Windows machine, a MacBook, or an iPad at the site shed, with shared workspaces and live cursors when two people review at once. No licence servers, no seat moves, no version-eleven-final-FINAL.pdf.
05
The PDF specifics that matter on real plan sets
Construction PDFs are not office documents, and the handling shows: drawing files upload at up to 500 MB each, scanned (raster) sheets are supported alongside vector PDFs — calibration works the same on both, since scale comes from your reference dimension rather than embedded metadata — and exports keep markups as crisp vector content by default, with flattening to raster available when a recipient's viewer mangles layered annotations. Very heavy sheets render through server-side tiling, so a 200 MB scan set still pans smoothly in the browser.
06
Honest about Bluebeam and Drawboard
Bluebeam Revu is deeper PDF software — advanced editing, tool chests, Studio — priced accordingly and Windows-first. Drawboard Projects is strong for design-review collaboration between project teams. If those are your workflows, use them. This workspace wins where a small contracting team actually lives: markup that turns into quantities and a quote, on any device, at ${PRO_PRICE_COPY}.
See whether it fits your next job.
Start with your own drawing and check the workflow.
See how it works
Try the tools on a real drawing.
Explore the example below, or take over the workspace and try it yourself. No signup needed for this demo.
Common questions
Questions about PDF markup for construction
Can contractors mark up PDFs online?
Yes. ContractorCounter runs in the browser and supports common construction PDF markup workflows — clouds, callouts, stamps, comments, measurement, and counts — without a desktop PDF editor, on Windows, Mac, and iPad.
What is the best PDF markup software for construction drawings?
It depends where your markups end up. For advanced PDF editing and Studio collaboration, Bluebeam Revu is the incumbent. For design-review discussion, Drawboard Projects. For a contracting team whose markups should become measured quantities and a priced quote, that chain is what ContractorCounter is built around — and it is the part general PDF tools and most markup apps do not do.
Does PDF markup work on scanned drawings?
Yes — raster scans mark up and calibrate exactly like vector PDFs here, because scale comes from a reference dimension you set, not from the file's metadata. Old scan sets with no embedded scale measure fine once calibrated against a known dimension like a grid spacing or door width.