Can my business storage shed be claimed as office space deduction, even though it was claimed as an expense the year it was bought?

I'm self employed- landscape maintenance.  I have a shed on my property I use to store my pesticides and fertilizers, and some business equipment, its used 100% for my business.  I claimed the shed as an expense the year I bought it (2015). Am I able/allowed to deduct it as "office space", inventory storage space, or not, since it has already been claimed as an expense in the previous year?