Hello everyone, I am in the process of designing a new home and would like to learn more about how certain choices may affect the appraised value of the improvements. In my case, I would prefer a lower appraisal and its accompanying property taxes (and possibly insurance as well). Issue #1: Detached vs. attached garage with living space above I am in need of very large garage (30' x 40') to house two cars, a truck, and a workshop area. I would further like to have an office and guest quarters in the space created above by using a gambrel roof. If you can picture a stereotypical barn, you'll have a pretty good idea of what the garage will look like. The living space would be accessed by stars and a deck running up the back side of the garage. For reasons dealing with the ability to be licensed as a bed & breakfast, it may be advantageous to "attach" the garage to the main house (< 10' away from front corner of garage to back corner of the house ) by creating a covered breezeway. I understand there is some debate on whether this constitutes an attached garage in the appraisal world. I am currently led to believe that it would be viewed as "attached" by my municipality, which is a requirement for the bed & breakfast licensing; specifically, "all guest rooms must reside in the principal structure" in order to have a B&B in my residential neighborhood. I am only looking to have the one guest room as a possible short and/or long-term rental option. First, does anyone know with a fair amount certainty how a Texas appraisal district would view this hypothetical structure? Second, is there an affect on the appraisal of the living space if it were considered attached versus detached while being accessed from the outside in either case? Thank you very much for your time and assistance.