Bedroom Sizes by Property Class

[Dan L.]

I just bought a 1930s C+ Class SFR as a rental that has "4 bedrooms", all upstairs. The bedrooms are 53 sq ft, 73 sq ft, 91 sq ft and 86 sq ft. 3 of the 4 rooms have no closets... The 86 sq ft one has a large walk-in closet, so I'm considering that the master bedroom. Obviously the 53 sq ft one is too small... But how about the other 3? I could: a) open the wall between the master and 53 sq ft; b) make 53 sq ft a bathroom (much more money but could be worth it since there are none on 2nd floor); or c) l could leave it as a "bonus room". But 86 sq ft is too small for a master bedroom, right?