What are the rules?
5 Things to know about square footage I have received calls from buyers and real estate agents complaining about finding out that their home or condominium had less square footage than was represented on their original MLS® listing.
Same rules apply when your two car garage has an interior hall closet protruding into the garage space or a staircase and landing added inside the garage to deal with the elevation [height] of the garage that renders your two car into a single car garage.
The plan and elevation drawings [and municipal tax department] now indicate you have a two car garage where two cars cannot fit.
Good advice from Mark Weisleder