The square footage on your next listing â where's it actually coming from? If the answer is county records, here's what that means: you're pricing the home on an estimate made by someone who has, in all likelihood, never set foot inside it. They didn't measure it. They estimated it â from the outside, from a desk, blueprints or sometimes off a card written decades ago. What about those offsets, two story ceilings, two story foyers, finished areas above a garage? Most agents were never taught to measure a home themselves. It was never in the training. So the number gets pulled from the assessor or an owner's guestimate, dropped into the MLS, and the whole CMA gets built on top of it. Then the appraiser shows up and measures to the ANSI standard. The gap between those two numbers? 50 to 300 square feet is common. At $25â$100 a foot, that's thousands â sometimes tens of thousands â moving in either direction. A gap of 400-600 square feet usually means entirely different comparables - different market segment. And here's the part that stings: your listing data doesn't just sit there. It becomes a comparable sale. So one wrong number doesn't only risk your deal â it quietly follows the next agent, and the one after that. That damages all the pipelines feeding from the MLS. Under UAD 3.6 (mandatory Nov 2, 2026, no extensions), your MLS data now gets checked against county records AND the appraiser's own measurements. The gaps that used to slide through now flag. Remember: every financed deal sells twice â once to the buyer, once to the lender. The second sale runs on that number. So I built you a free field guide: what actually qualifies as a bedroom, how each level is graded, egress specs, the closet myth, and a pre-listing checklist you can run before you go live â so the lender's appraisal confirms your number instead of correcting it. Stay tuned for ANSI training details! It's here in the community. Grab it, use it on your next listing, and send it to an agent who needs it.