May I deduct my wharehouse building expenses as a separate home office? This is an essential part of my rental property management process.

[KristinaK]

If you are using the warehouse for conducting ordinary and necessary business, this will be your business expense. If you own it, you will report it as a depreciable asset and also expense ordinary and necessary expenses. If you rent it, you can deduct the rental expenses. 

You will not need to claim it as a home office.