We converted our detached garage into office space where clients are seen regularly. I understand this should qualify for the home office deduction, and we can therefore deduct a percentage of the home's utility and maintenance costs. However, it's a detached structure that doesn't consume some of the home's utilities. For example it has no gas line or water line going out there, but we do have to pay those utility bills for our home in general. As this is a separate structure on premises, I'm wondering if we are still allowed to include utility and maintenance costs for the primary home even if we know those bills do not impact the separate structure.
