What is the Chinese word for "home office"?
SOHO (small office/home office) is a new business concept that encompasses the idea of working and living, flexibility and connectivity using the limited space of a small office or home office. Depending on local regulation, real estate developments that are being marketed as SOHO may or may not be approved for both office and residential use.

The proper term to describe SOHO activity is 居家就业 or 家居办公. As for the translation of the term "home office", I would definitely go with 家居办公室.