I currently rent out one bedroom of my condo and use the remainder as a home office.
Home office for what? I ask, because you are not allowed a home office on SCH E for ***RESIDENTIAL*** rental real estate.
The rules for depreciation are covered in IRS Pub 946. Somewhere in there it covers what I guess you would called "mixed use" and if conditions are met, it would all be depreciated over 27.5 years.
See IRS Publication 946 page 33, section called "Office in the home" at https://www.irs.gov/pub/irs-pdf/p946.pdf
