A buyer walks a listing in Eastown, Grand Rapids with a laser measurer in her pocket. She's not being paranoid — her lender's appraisal came back a week later at 1,540 square feet, not the 1,720 posted on the MLS. Now the gap is her problem to explain to her lender, and her agent is on the phone with me asking how that number got on the listing in the first place.
It happens more than agents want to admit. The square footage on a lot of Grand Rapids and West Michigan listings never actually gets measured for that listing. It gets copied from the county assessor's card, or from whatever the agent five owners back typed into the MLS. Nobody checks it until an appraiser, or a buyer with a tape measure app, does the math themselves.
Where the square footage on your listing actually comes from
Most listing square footage in West Michigan traces back to one of two sources: the local township or city assessor's record, or a prior MLS entry that gets copied forward at every relisting. Assessors measure for tax purposes, not sale purposes, and their totals often fold in finished basements, enclosed porches, or garage space that a buyer's appraiser would never count toward livable area. That mismatch is exactly why the number on a decade-old assessor card and the number an appraiser produces today can tell two different stories about the same house.
The standard almost nobody in West Michigan uses to measure it
There's an actual industry standard for this: ANSI Z765, the same method Fannie Mae now requires appraisers to use on most conventional loans. It's specific almost to the point of being fussy — measurements taken to the nearest tenth of a foot, walls measured from the exterior, ceilings under five feet excluded, staircases counted on the floor they descend from. Appraisers use it because a lender is on the other end of that number. Most listing agents never touch it, because nothing forces them to until the appraisal comes back different.
What counts as square footage, and what doesn't
This is where most of the confusion lives. A finished basement, no matter how nice, isn't counted in above-grade square footage under ANSI rules, even though it obviously adds real living space. A three-season porch with no permanent heat source usually doesn't count either. Garages never count. None of that means the space doesn't matter to a buyer — it means the headline number on the listing and the number an appraiser hands the bank can legitimately be very different, and buyers get blindsided when nobody explains why upfront.
Floor plans and 3D tours available on every shoot. Book a Listing Shoot
Why guessing at square footage is a real liability
An agent who publishes a square footage number is making a factual claim about the property, and real estate attorneys point to inflated or copied square footage as one of the more common sources of post-closing claims against listing agents. It rarely tanks a sale outright. It shows up later, as an appraisal that comes in under contract price, or a buyer who feels misled once they've moved in and measured for furniture. Either one turns into a call nobody wants to make.
How a floor plan fixes your listing's square footage before it's a problem
The fix isn't complicated: measure the home once, properly, at the same visit as the photos. A floor plan add-on gives you a laser-measured layout with room dimensions and a total square footage the agent can actually stand behind, instead of a number inherited from an old tax record. It does double duty, too — buyers use floor plans to plan furniture placement and check whether a king bed fits in the primary bedroom, which is a real reason listings with them tend to hold attention longer online.
What I do on every shoot where this comes up
On my end, a floor plan is a $75 add-on to any listing package, measured and drawn at the same visit as the photos, so there's one site visit and one clean, defensible number for the listing. I'd rather hand an agent a floor plan with a number that matches what an appraiser will find later than have that agent field an awkward call three weeks into escrow. It's a small add-on next to the cost of a deal wobbling over a number nobody ever checked.
I'm not an appraiser and I don't play one — I just measure the house the way the standard says to, hand you a floor plan, and let the number speak for itself. If you've got a listing coming up in Grand Rapids or anywhere in West Michigan and you're not sure the square footage on file is right, ask me to check it when I'm there for the photos. It costs a lot less than the conversation you'd otherwise be having with a buyer's agent in week three.