Can I sue for wrong square footage?

It depends on your state's law, the purchase contract and any disclaimers or as-is clauses you signed, so there is no general yes or no. A disclaimer doesn't automatically end such a claim: in Furla v. Jon Douglas Co. (1998), a California appeals court let the buyers' claim go forward, holding that a grossly wrong approximation of size can be an actionable misrepresentation even when the listing called it approximate. Deadlines to bring a claim also apply. If you think you overpaid because of a wrong figure, talk to a real estate attorney in your state, and bring the listing, the contract, any disclosures and your measurements.

Who is responsible for square footage in a real estate listing?

Generally the person who publishes the figure, usually the listing agent, is expected to get it right or say where it came from. How far that goes depends on the state. North Carolina doesn't require brokers to report square footage, but if they do, it must be accurate. Colorado has brokers disclose the source and method on a commission-approved form and expects buyers to verify. This is general information, not legal advice.

Is a buyer's agent responsible for wrong square footage?

Generally a buyer's agent can rely on the square footage in the listing unless the error should have been obvious to them. Rules and duties vary by state, so the specifics depend on where the home is and what the agency agreement says.

Does saying square footage is approximate protect the agent?

Not always. Disclaimers such as 'approximate' or 'buyer to verify' set expectations, but in Furla v. Jon Douglas Co. the court held that whether the buyers reasonably relied on the figure despite the disclaimers was a question of fact, and that "a grossly erroneous 'approximation' of size is an actionable misrepresentation." How much a disclaimer protects depends on state law and the facts.

Is there a law for how to measure square footage in a listing?

There is no single US law. ANSI Z765-2021 is the national standard for measuring single-family homes, and Fannie Mae and Freddie Mac require it for appraisals, but it is voluntary for listings. Some states have their own guidance: North Carolina's Real Estate Commission publishes residential square footage guidelines, for example. Check your state's real estate commission.

What should I do if the appraisal shows less square footage than the listing?

Find out why before reacting: compare the appraisal's above-grade and below-grade figures with the listing, since a finished basement counted in the listing total is the most common cause. If the gap is real and you haven't closed, raise it with your agent while you can still negotiate. After closing, keep your documents and talk to a real estate attorney.

Guide

Who Is Responsible for Square Footage in a Listing?

Who answers for a wrong square footage figure in a listing, what agents typically disclose, and what buyers can do when it's off.

Updated October 12, 2026 · FloorFigures

Short answer

There is no single US rule. Generally the person who publishes the figure, usually the listing agent, is expected to get it right or say where it came from. North Carolina, for example, requires any square footage a broker reports to be accurate, while Colorado has brokers disclose the source and expects buyers to verify. Disclaimers help but have limits: a California court held that "a grossly erroneous 'approximation' of size is an actionable misrepresentation." This is general information, not legal advice.

Square footage drives how buyers compare homes and how much they offer per foot, so a wrong figure can cost real money. When it turns out to be wrong, the question is who answers for it. The short version: it varies by state, but the person who put the number in front of the buyer carries the most responsibility, and everyone else has a role in checking it.

Is there a legal standard for listing square footage?

No single US standard governs listings. ANSI Z765-2021 is the national standard for measuring single-family homes, but it's voluntary and says it is "not meant to replace or supersede any legal or otherwise required existing area measurement method." Fannie Mae and Freddie Mac require it for appraisals of single-family homes on loans they buy. That rule binds appraisers, not listing agents. The National Association of Realtors notes that several states require appraisers to follow ANSI. For listings, the rules come from each state's real estate commission and its license law, plus local MLS rules.

Who answers for a wrong figure?

The general picture, which varies from state to state:

Party	Role in the figure	General position
Listing agent	Chooses the figure and publishes it in the MLS and marketing	Expected to report it accurately or disclose its source
Seller	Often the original source: their records, a prior appraisal or the builder's plan	What sellers must disclose varies by state
Buyer's agent	Passes the listing figure to the buyer	Can generally rely on it unless the error should have been obvious
Buyer	Decides what to offer	Expected to verify in some states (Colorado, for example) before the contract deadline
Appraiser	Measures for the lender	Uses ANSI Z765-2021 on Fannie Mae and Freddie Mac loans; often the first independent measurement
County assessor	Keeps the tax record	Its figure is for taxation; errors are fixed through the assessor

Two state examples: North Carolina and Colorado

Two states with clear published positions show how different the approaches can be.

	North Carolina	Colorado
Reporting	Not required, but any figure a broker reports, including in the MLS, must be accurate	A commission-approved Square Footage Disclosure form records how the figure was obtained
Method	The Real Estate Commission's guidelines or ANSI Z765	The form states whether the listing broker measured and by which method (exterior, FHA, ANSI, local or other), or the source (prior appraisal, plans or assessor)
Who verifies	The broker is responsible for accuracy	The buyer, before the contract deadline
What the figure means	A representation the broker must get right; inaccurate figures have led to discipline under the license law's misrepresentation provision, N.C.G.S. § 93A-6(a)(1)	The form says it is "for the purpose of marketing ONLY"

North Carolina's guidelines count heated living area with ceilings of at least 7 ft (6'4" under beams and ducts), with a sloped-ceiling rule built on 5 ft and half the room, close to ANSI's. Other states take their own approaches. Check your state's real estate commission for its current guidance.

What Furla v. Jon Douglas Co. shows

Furla v. Jon Douglas Co. (Cal. Ct. App. 1998) is a California case about a listing's square footage. The house was listed as "APX: 5500" sq ft. Appraisers measured it at 4,437 to 4,615 sq ft, between 885 and 1,063 sq ft less (16% to 19%). The trial court granted summary judgment to the broker. The appeals court reversed, holding that whether the buyers reasonably relied on the figure despite the "approximation" language was a question of fact, and that:

"a grossly erroneous 'approximation' of size is an actionable misrepresentation."

Reversing summary judgment meant the buyers' claim could go forward; it wasn't a final verdict on who owed what. It's one California appellate decision. Courts in other states have their own law, and outcomes depend on the disclaimers, as-is clauses and facts of each sale.

Do disclaimers protect agents?

Disclaimers like "square footage is approximate" or "buyer to verify" are common, and they do something: they tell the buyer the number isn't guaranteed and invite them to check. Colorado's form goes further and labels the figure as for marketing only. Their limit is the one Furla describes: a disclaimer doesn't turn a careless number into an accurate one, and whether a buyer could reasonably rely on it may still be a question for a court. The better protection is a figure that's right and a clear record of how you got it.

What agents commonly do to protect themselves

State the source and method on the listing: "measured by the listing agent per ANSI Z765-2021", "per the county record", or "per a 2024 appraisal".
Measure to a standard: ANSI Z765 (or the state's own guidelines, as in North Carolina), from the outside walls, with above-grade and below-grade area reported separately. See how to measure a house.
Don't copy the county figure silently. If you use it, say so, and check it against a floor plan first.
Keep the work: the sketch or floor plan, the dimensions, photos and the date.
Get a professional measurement for complex houses with sloped ceilings, partly below-grade levels or rooms over the garage.
Correct the listing promptly when a better figure turns up.

What buyers can do

Ask where the number came from before you make an offer based on price per foot.
Check it during your inspection or due diligence period: compare the county record and any prior appraisal, and measure the floor plan or the house. See how to verify square footage.
Read the appraisal if you're financing. It reports above-grade and below-grade area separately, so you can see exactly where it differs from the listing.
Raise a gap before closing, while it can still be part of the negotiation. Work out what it means with the square footage discrepancy calculator.
After closing, talk to a real estate attorney and keep the listing, the contract, the disclosures and your measurements.

Many gaps turn out to be definition differences rather than errors, such as a finished basement added to the total. Why square footage figures differ covers the usual causes.

Documenting a measurement with FloorFigures

FloorFigures is a free tool that measures a floor plan in your browser with ANSI Z765-style rules and exports a PDF report: the plan with the measured areas drawn on it, the scale and how it was checked, an area summary with above-grade and below-grade figures, a copyable ANSI statement, and a comparison with the listed figure. It's a record of the source and method, which is what both agents and buyers need when a number is questioned.

Questions

Can I sue for wrong square footage?: It depends on your state's law, the purchase contract and any disclaimers or as-is clauses you signed, so there is no general yes or no. A disclaimer doesn't automatically end such a claim: in Furla v. Jon Douglas Co. (1998), a California appeals court let the buyers' claim go forward, holding that a grossly wrong approximation of size can be an actionable misrepresentation even when the listing called it approximate. Deadlines to bring a claim also apply. If you think you overpaid because of a wrong figure, talk to a real estate attorney in your state, and bring the listing, the contract, any disclosures and your measurements.
Who is responsible for square footage in a real estate listing?: Generally the person who publishes the figure, usually the listing agent, is expected to get it right or say where it came from. How far that goes depends on the state. North Carolina doesn't require brokers to report square footage, but if they do, it must be accurate. Colorado has brokers disclose the source and method on a commission-approved form and expects buyers to verify. This is general information, not legal advice.
Is a buyer's agent responsible for wrong square footage?: Generally a buyer's agent can rely on the square footage in the listing unless the error should have been obvious to them. Rules and duties vary by state, so the specifics depend on where the home is and what the agency agreement says.
Does saying square footage is approximate protect the agent?: Not always. Disclaimers such as 'approximate' or 'buyer to verify' set expectations, but in Furla v. Jon Douglas Co. the court held that whether the buyers reasonably relied on the figure despite the disclaimers was a question of fact, and that "a grossly erroneous 'approximation' of size is an actionable misrepresentation." How much a disclaimer protects depends on state law and the facts.
Is there a law for how to measure square footage in a listing?: There is no single US law. ANSI Z765-2021 is the national standard for measuring single-family homes, and Fannie Mae and Freddie Mac require it for appraisals, but it is voluntary for listings. Some states have their own guidance: North Carolina's Real Estate Commission publishes residential square footage guidelines, for example. Check your state's real estate commission.
What should I do if the appraisal shows less square footage than the listing?: Find out why before reacting: compare the appraisal's above-grade and below-grade figures with the listing, since a finished basement counted in the listing total is the most common cause. If the gap is real and you haven't closed, raise it with your agent while you can still negotiate. After closing, keep your documents and talk to a real estate attorney.