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The invisible final audit for drawing integrity.

MarkedUp helps GCs and architects catch drawing inconsistencies before they become rework, delays, and claims, without asking teams to move drawings into a new system.

What GCs see first

Gordon Highlander: catch drawing mistakes before estimating starts.

Gordon Highlander uses MarkedUp's integrations as its standard drawing-review process, catching drawing mistakes before the estimating team spends time on an incorrect drawing set.

MidHudson CM: catch the discrepancy before the $54K change order.

MidHudson CM uses MarkedUp as a final drawing audit for preconstruction. A discrepancy was caught before it reached the field and became a $54K change order.

A final drawing audit is not a new review destination. It is proof of what broke in the set, returned early enough for the GC team to act.

Industry context

Industry rework estimate: over $64 billion annually in the US (FMI/Autodesk, 2023). A large share of that waste traces to uncoordinated drawings, the problem MarkedUp is built to catch earlier.

The origin of MarkedUp

The idea for MarkedUp did not start in a boardroom; it started with a single, painful error. In 2023, my brother-in-law, Harry, was completing his engineering cadetship when he missed a critical detail while using the same manual review process I had used back in 2008. More than a decade of software progress had not changed the basic reality: precon teams were still relying on highlighters, cross-references, and human fatigue to protect construction margins.

I built MarkedUp to automate the grueling consistency checks that people should not have to perform sheet by sheet. ConstructionProof is the simple drag-and-drop path; folder listening is the automatic path. Both return findings to the tools teams already use.

For the teams that issue and receive sets

GCs, architects, VDC teams, and owners see the same drawing risks from different sides of the handoff. MarkedUp gives each team a final, scoped audit of the relationships that matter: the sheet index matches the sheet numbers, callouts point to real details, door tags match the schedule and plan, keynotes match the legend, and MEP equipment and panels match the plan.

Built for AEC by AEC pros

We didn't build this from Silicon Valley. We built it from job sites, hard hats, and real field experience. Designed by construction veterans who know the work firsthand, MarkedUp is purpose-built for the people who actually build the world.

To our customers and partners

Thank you for trusting us with the work that protects your set before it reaches bid, issue, or the field. We are building the audit layer that gives teams proof of what broke early enough to matter.