Do you have any tenants in the building? If you do, what you really want is an insurance package that covers your interests as a landlord as well. Depending on your situation, you might want a Landlord Insurance Package.
It can be difficult to find insurance appropriate insurance. To save time and perhaps money, try calling insurance brokers. Here is a list I found in a search:
Hope it works out for you!
Licensed Real Estate Salesperson
Charles Rutenberg Realty, LLC
127 East 56th Street, 4th Floor
New York, NY 10022
(212) 688-1000 ext. 383
(917) 365-0876 cell and text messages
(212) 688-1919 fax