How to show addition

[Shawn Thom]

I'm working a rehab & sell on a smaller house that was originally a little over 1400 square feet. It has an addition on it that is about 250sq ft. Tax records still show the 1400 square feet size.

When I go to sell it, how should I show the size? I have seen MLS showing on some houses where it is listed as 1400/tax, or 1650/owner, or 1650/appraiser (assuming you got the square footage from an appraisal).

Any suggestions on how to proceed?