CubiCasa and Matterport Floor Plans are useful, but not accurate enough to rely on for square footage calculations — and we have the data to support that.
In our own testing, plans produced by CubiCasa averaged 11.48% smaller than our professionally drafted plans. When cross-referenced against county records, CubiCasa showed a −9.36% difference. Open Homes’ professionally drafted plans came in at only ±0.40% difference .
Why the stark difference? The root cause isn’t actually the quality of the scan; it’s the methodology behind it. Automated tools must assume standard wall thickness rather than measuring it, and they can’t apply the expert judgment required for complex measurement scenarios like staircases, landings, bump-outs, or grade changes. Furthermore, tight spaces like closets and pantries can’t be accurately accounted for in the floor plan calculations. If it’s not scanned, it can’t be measured or drawn.
For helping buyers understand the layout of a home, Scan Drafter and Matterport plans are a reasonable and cost-effective visual aid. For any listing where square footage needs to be accurate — especially in markets where price-per-square-foot is central to the conversation — a professionally drafted plan is the right choice.