Construction takeoff
Takeoff data for estimating AI, symbol by symbol.
Architectural, structural and MEP drawings annotated by reviewers trained on construction conventions, so your model counts what an estimator would count.
Symbol classes across electrical, plumbing, structural and MEP drawings.
Construction plans processed a month.
Annotations delivered a month.
Agreement between annotators across classes.
What we annotate on a drawing set.
Drawing standards differ by country, contractor, software and era. Our reviewers have worked across US, Australian and international sheets.
Symbol detection
Electrical panels, outlets, switches and conduit. Plumbing fixtures, valves and cleanouts. Structural columns and beams. Ducts, diffusers and sprinkler heads.
Polygon segmentation
Rooms and spaces, walls and slabs, duct routes, HVAC zones, floor areas and material zones.
OCR and text extraction
Dimensions, room labels and specifications, bill of quantities tables and cross sheet references.
Entity classification
Materials from legends, symbols linked to specification sheets, revisions and amendments tagged.
A sheet, as it comes back.
Counts by symbol and trade, low confidence symbols sent to a second reviewer, and the legend sheet linked. Illustrative data.
Counts on this sheet
| symbol | trade | qty | |
|---|---|---|---|
| duplex outlet | E | 14 | ok |
| switch | E | 9 | ok |
| panel board | E | 1 | ok |
| floor drain | P | 3 | check |
| WC | P | 2 | ok |
| supply diffuser | M | 6 | ok |
2 drains below 0.5 confidence sent to reviewer R03. Legend sheet G001 linked.
Estimating teams we work with.
- Client JBlueprint quantity extraction · Israel
- Client KLandscaping plan takeoff · USA
- Client LEstimating software · Australia
- Client IPre construction platform · USA
Domain trained reviewers
Trained on drawing conventions and trade symbol vocabularies before they label a sheet.
Consensus on hard classes
Ambiguous symbols and partial completions need agreement from more than one reviewer.
Full audit trail
Every annotation logged with annotator ID, time, review status and correction history.
Delivered as COCO JSON, Pascal VOC, YOLO or your own schema. We work in Roboflow, CVAT or your platform.
A human verification layer for AI extracted fields on construction bills, invoices and site notes, running 24/7 until the model no longer needed it.
Live verification inside a production AI pipeline, under 2 minutes, for six months
Defect annotation on building imagery in CVAT, with a webhook loop between annotators and reviewers.
50,000 facade annotations a week for building condition assessments
Send us a drawing set your model gets wrong.
Send a small batch and get it back done, free, usually within 24 to 48 hours. You judge the work before you pay for anything.