I own a 4 bedroom home that I have converted to a guest house. I have 3 guest bedrooms and everything else (less of course my bedroom/bath) is shared/common area. How do I calculate the deductions for this? Details are below.
2nd floor contains:
3 guest bedrooms (used exclusively by guests)
1 full bath (used exclusively by guests)
1 storage room (used exclusively by me for guest room supplies (extra sheets, pillows, cots, floor mattresses, seasonal blankets, extra toilet and facial tissue, paper towels,.... )
1st floor contains:
* kitchen, livingroom, dining room, library, laundry, 1/2 bath (fully shared / common)
* My bedroom and bath (used exclusively by me)
Backyard contains:
the hot tub, pool, deck, firepit, etc. (fully shared / common)
Note: I definitely use over 350 square foot of my home for:
* a "home office"
* a large "storage room" for guest room supply storage
* part of the garage for guest room supply storage
* part of the basement for guest room supply storage
