Mixed use property questions

[Mike Sullivan]

I'm looking to purchase a large single family home that has been divided up into two apartments on the 2nd floor, and 2 separate office spaces on the bottom floor. I've been a residential landlord for a few years but have no experience in dealing with commercial office leases. Besides teaming up w/ a real estate attorney to deal with the commercial leases, what types of general questions or issues should I consider before pursuing a property like this?  

For example, I will be asking the type of zoning the property is under and if there's a specification on the primary use, just in case I want to convert to all housing.

I don't know much about commercial office space leasing, so if there are any sources people can point me to, it would be appreciated.