155 Fleet Street, is one of Downtown Portsmouth’s largest and most prestigious office buildings. Located just steps from Market Square, 155 Fleet St. has had landmark tenants over the years. By 2003, oHive, then IOS Business Centers, took over the three story 24,000 sq. ft. building and continued to modernize and beautify this building into the premiere office space that it is today. Currently this multi-tenant office and business center offers three-stories of dedicated and shared co-working space as well as offices from 100 sq. ft. to 5,000 sq. ft.