Drone orthomosaics for lender draw documentation on construction projects

When a construction loan draw request goes in, the lender needs to verify that work is complete to the level claimed. That verification usually comes from a bank inspector, a third party who visits the site, walks it against the draw schedule, and signs off. The process takes time, and if the inspector's read of site progress differs from the draw amount, the funds are delayed or reduced.

Aerial documentation doesn't replace the inspector, but it changes the dynamic. A drone orthomosaic is a georeferenced, scaled overhead map of the full site, built from photos taken at a consistent altitude on a specific date. The timestamp is embedded in the file. A GC can include it in the draw package before the inspector arrives, showing exactly what the site looked like on the day the draw was submitted: foundation poured to this line, framing complete in these bays, mechanical rough-in visible through open roof sections.

Where this fits in practice

For a GC submitting monthly draws on a commercial build, a scheduled weekly or bi-weekly monitoring flight produces dated aerials automatically. The orthomosaic from the week the draw goes in becomes the supporting documentation. No separate scheduling, no camera crew, no pulling a super off site for a walkthrough photo session.

For developers managing multiple active projects, aerial documentation gives them a current view of each site that goes into investor and lender updates. A package with dated aerials from each project is cleaner than compiling phone photos from different supers across multiple sites.

For the lender's inspector, an aerial record of site conditions at each draw date provides a reference point independent of what the GC or owner reported. Some lenders in South Carolina now request aerial documentation alongside draw packages as standard practice on larger commercial loans.

What the deliverable looks like

A georeferenced GeoTIFF orthomosaic (a scaled overhead map accurate enough to measure distances directly in the file) plus a GPS-tagged photo set of the full site organized by date. Both are delivered as a shared folder within 48 hours of the flight. Files open in AutoCAD, Civil 3D, ArcGIS, and standard project management platforms.

For multi-phase projects, each monitoring session adds a dated layer to the record. By project completion, there's a full aerial timeline from site clearing through final inspection.

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