I measured a historic home today and used ANSI guidelines (have for years now). Once I returned home, I noted that the MLS listing stated the home was about 400 sf larger than what I had measured (measurement done by previous appraiser and put in MLS). I compared the two drawings and found we were about 6 sf different on the lower level, but close to 400 sf different on the upper level. I'm stumped. I typically utilize ANSI guidelines...however, the realtor's words were that I "should be a little lienient because it is a historic home" and their nature is to have nooks and crannies... The other appraiser measured wall to wall. So...what's a girl to do in this situation? Some of the wall heights were around 3 feet...steep pitched roof. HELP!