Building Coverage. Not more than 30% of the lot area may be occupied by residential dwellings, professional offices, and/or retail sales and service buildings. Borough Council may exempt open recreational structures and open assembly structures, during the conditional use process. Not more than 5% of the total interior building floor area may be designated for nonresidential uses. No single nonresidential use shall occupy less than 1,000 or more than 3,000 square feet. Floor areas specifically intended for the support of the residential dwellings shall be considered residential in nature. Examples include: common hallways, foyers, recreational, and assembly halls for the exclusive use of the residents and their guests, utility rooms, and private offices or maintenance shops for the exclusive use of any agents or service personnel within the complex.