Guides · Floor Plan Measurement
CubiCasa is one of the most widely used floor plan services in residential real estate. The persistent frustration: CubiCasa deliberately omits total square footage from its output. The underlying measurements are there — they just won't show you the total. Here's how to get it in under two minutes.
CubiCasa withholds total square footage as a liability measure — they don't want their AI-generated number used as the official GLA in listings and appraisals without professional verification. They do include room-by-room labeled dimensions, which gives you everything you need to calibrate a measurement tool.
From your CubiCasa account or the agent's link, download the floor plan as a PDF (preferred) or high-resolution JPG. Don't screenshot it — the original file has significantly higher resolution. If the plan is only available embedded in an MLS listing without a download link, use the highest-zoom screenshot you can capture from the listing.
Go to MeasureFloorPlan.com and upload your CubiCasa PDF or JPG. For multi-story homes the CubiCasa PDF shows each floor on a separate page — export each page separately and upload them independently.
Click around the exterior walls of the above-grade living space. CubiCasa plans show the garage as a distinct labeled area — exclude it from your GLA trace. For finished basements, trace as a separate polygon if you want that area but don't include it in your GLA total. For open floor plans just trace the full outer perimeter of the living area.
CubiCasa plans label most rooms with dimensions. Use the longest labeled dimension you can find — a master bedroom "13'0 × 15'6" (use the 15'6" wall), a living room width, or the overall house dimension if labeled. Click two points along the wall matching the label, enter the measurement, and calibrate. Results are typically within 1–2% of a field measurement.
Each polygon shows its area after calibration. For a two-story home sum both floor polygons. The result is your estimated GLA.
CubiCasa measures from interior wall surfaces, not exterior. ANSI Z765 requires exterior measurement. For a typical wood-frame home the difference is roughly 30–60 sq ft. For buyer/investor use this difference is usually acceptable. For appraisal use, note the distinction.
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