Every fall, Greater Boston transactions fall apart or renegotiate over a number that could have been settled for a few hundred dollars months earlier: the home's square footage. A listing goes live with a figure pulled from town records. Weeks later, the buyer's lender sends an appraiser who measures the home to standard and comes back with a smaller number. Now the price per square foot the buyer relied on is wrong, the financing may not support the contract, and a deal that was moving is suddenly stalled.
The frustrating part is the timing. This discovery almost always happens at the worst possible moment, mid-transaction, with a buyer emotionally committed and a closing date looming. It did not have to.
Why Town Records Are the Wrong Source
Most listing square footage comes from the assessor's record, and that record is frequently inaccurate. It may predate a renovation, rely on an old or rough measurement, or reflect a different counting method than the one appraisers use. The assessor's job is mass valuation, not precise measurement of your individual home, and their number was never intended to be the figure a transaction relies on. The size of the gap that creates is documented in the difference between what town records say and what a home actually measures, which shows how far the assessor's figure can drift from the measured reality.
When the buyer's appraiser applies the ANSI standard, the governing methodology for gross living area, the result can differ from the town's figure by enough to matter. The framework behind that methodology is worth understanding before you list; the ANSI Z765 standard that governs how GLA is calculated in Massachusetts property transactions explains why Fannie Mae made it mandatory and what it changed. Sometimes it is higher, and the seller undersold. For the listing agent, an inaccurate figure is also a liability question; why listing agents who advertise incorrect square footage face legal risk in Massachusetts explains the professional exposure a wrong number creates. More often the surprise cuts the other way, and the correction lands as a problem.
The August Fix
A professional, ANSI-compliant measurement before the listing goes live settles the question on the seller's timeline instead of the buyer's. The measurement establishes the gross living area under the exact standard the buyer's appraiser will later apply, which means the number in the listing and the number in the appraisal agree. No mid-transaction surprise, no renegotiation over a figure, no financing scramble.
For sellers planning a fall listing, August is the moment to do this, alongside the pre-listing appraisal and photography. Measure once, correctly, and market a square footage figure you can stand behind, because it was produced by the same methodology that will verify it.
The square footage question gets answered either way. The only choice is whether it gets answered in August, on your terms, or at the buyer's appraisal, on theirs.
If your Greater Boston property has been renovated, converted, or never professionally measured, our property measurement service delivers an ANSI-compliant GLA that stands up in any transaction.
