An appraisal/survey

This is way too broad a question for this venue. How big is the discrepancy? How did it come about? How do you measure square footage in your area? Measure the same home 4 times and you might get four different numbers.

we put this in the mls remarks; *HOA Fees, home square footage, and lot sizes should be independently verified.

Are you just disclosing it on a listing or....? Can you explain your Context? 

I am with Nina Hollander on this one.  My sense is that Sandy Padula and Norm Padula, JD, GRI NMLS#1483386 - with the appraisal/survey may resolve the issue. 

Sandy Padula and Norm Padula, JD, GRI NMLS#1483386  nailed this one!

Have an appraiser do a sq ft appraisal.

Your question is not specific enough.

land or home size?

land....have the seller survey it....instrument survey

home....outside dimensions can easily be measured....

See Paul Antonelli answer.  Verify, verify, verify.

Here, if the county data is incorrect, the first thing to do is to go to the town and found out how they do their measurements. Then make sure they updated the town and county data correctly, if it is indeed wrong.

Often times, the homeowner/real version of square footage is different because the homeowner did an addition without town concurrence. 

It depends on the context.

Aaron Mtuanwi - public records are usually not questioned.  Else get the appraisers.

Different areas have different ways they calculate the "official" square footage.  I use whatever is in the public records.  If you use your own number, it opens you up to complaints.

Measure to your own satisfaction!

Get a 3rd party measurements.  

If I think there is an issue with the square footage, I have an appraiser come in a re-measure.

There may be several opinions, to add yours, just pull out a tape and a calculator.

Our MLS allows us to indicate if the square footage is appraiser measured or agent measured. I have found no matter who does it, there will be a variance. If you think it is grossly off, your taxing authority may be willing to recalculate especially if they think they stand to gain additional taxes. 

I assume you want to dispute the appraisal as too small? Tape measure and get all the angles perfect, may need another licensed appraiser to provide the arbitration. If is to put in the listing, the square footage with county may not reflect additions, make sure they were permitted. 

I do my own measurements to double-check. When in doubt, err on the side of being lower. May want to get a professional, say from town hall, involved.

An appraiser should be able to verify the square footage.  If you have access to the original blue prints, the architect/builder would have this information as well.  Be aware that if this info is brought to light with the local taxing district, if you live in an area with property taxes, the change in square footage could result in additional or less property taxes owed.

Aaron Mtuanwi What is the discrepancy? Have an appraiser measure the property and then present it to the County/City.

Getting a professional to measure, etc.

Have it professionally measured (appraiser should be fine) and then contact the county assessor's office and petition for the correction.

I'm with Sandy Padula and Norm Padula, JD, GRI NMLS#1483386 on this one and add the tax collector

The best way is when the appraiser does it or ask county to calculate it. I use tax records.

County assessor might be a good start.

The OWNER is responsible for correcting.

The agent is responsible for disclosing and advising buyers, "More square footage equals higher taxes."

Then include in description "Buyer is responsible for confirming all attributes of value. Agent believes data to be accurate but not verified.

Include the correct information in your listing.

Land - survey

home size - measure it!

Hi Aaron - as others have answered, the context of the discrepancy or measurement needs to be known.

I "cite" the source for measurement of a property size.  The home is 2000 square feet per public records.  Or per appraisal 09/01/16.  Or from professional measurement.   Then add a disclosure about verifying the information.    

For you listing, measure it yourself. I always check the tax card, original appraisal and old mls. If anything differs, break out the tape and or laser

SF is approximate so technically there is no discrepency. Even if you got different appraisers there SF would rarely if ever match. 

It depends on where the discrepancy is located.