A building in which the named insured is a commercial enterprise primarily carried out to generate income and the coverage is for:
1. A building designed as a non-habitational building;
2. A mixed-use building in which the total floor area devoted to residential uses is
a. 50% or less of the total floor area within the building if the residential building is a single family property; or
b. 75% or less of the total floor area within the building for all other residential properties; or
3. A building designed for use as office or retail space, wholesale space, hospitality space, or for similar uses.