The problem
When a new plan revision arrives, someone on the team has to figure out what changed. On a small project, this means opening the old PDF and the new PDF side by side and scanning for differences. On a large project with 200 sheets, this process is impossibly tedious and prone to error. Changed dimensions, moved walls, added details, and removed notes can easily go unnoticed when you are comparing visually across two separate documents.
The consequences of missing a change are serious. A sub builds off the old dimension because nobody caught that the architect moved a wall six inches. A trade installs based on a detail that was revised in the new set. The change was in the drawings, but the team never identified it because manual comparison is unreliable. By the time the discrepancy is discovered in the field, rework is already required.
How HomeFloorPlan solves it
HomeFloorPlan provides plan overlay comparison that highlights differences between two revisions of the same sheet. Upload the new revision and the system overlays it on the previous version, visually flagging areas where the drawings differ. You see exactly what changed without scanning every inch of both sheets manually.
The overlay view uses color highlighting to distinguish between elements that were added, removed, or modified. The team can quickly identify every change, discuss the implications in pinned comments, and ensure that no modification goes unnoticed. This comparison happens automatically when you upload a new revision, making it a built-in part of the revision management workflow.
Key features
Visual overlay of revisions
Overlay the new revision on top of the previous version and see differences highlighted in color. Added, removed, and modified elements are visually distinct.
Automatic comparison on upload
When you upload a new revision, the comparison is generated automatically. No manual alignment or setup required.
Change discussion with pins
Pin comments on identified changes to discuss their implications with the team. The discussion is tied to the specific change on the plan.
Sheet-by-sheet change summary
See a summary of which sheets have changes and which are unchanged. Focus your review on the sheets that matter.
Why teams choose HomeFloorPlan
- Catch every design change between revisions without manual sheet-by-sheet comparison
- Prevent costly rework caused by missed changes in the new revision
- Save hours of comparison time when large drawing sets are revised
- Give the team confidence that they have identified all modifications
- Discuss changes in context with pin-based comments on the overlay view
Frequently asked questions
How accurate is the overlay comparison?
The overlay comparison in HomeFloorPlan aligns the two revisions and highlights visual differences between the sheets. It is effective for identifying changes in layout, dimensions, and annotations across standard construction drawings.
Can I compare revisions from different architects or design teams?
Yes. As long as both revisions are uploaded as PDFs, the overlay comparison works regardless of which software produced the drawings. The comparison is visual, not format-dependent.
Does the comparison work on all sheet types?
The overlay comparison works on any plan sheet including architectural, structural, MEP, and site plans. It is most effective on sheets where the layout is consistent between revisions, allowing the system to align and compare the content accurately.