For my owner-occupied 2-unit building, I typically split any building-wide projects 50/50 and deduct from there. This year I put in a sizeable investment in insulation. Should I treat the 50% I am eligible to deduct as a depreciable improvement or can I fully expense it? I typically try to expense anything I can but I don't know where insulation lies in this, and what the limits are.
And is there any complicating factor regarding green energy improvements? I think of those as only accessible to owner-occupied buildings and so would I then apply the personal 50% of the project to the green energy credit?
