In a First Residential District, no building or portion of a building to be used as a residence shall be erected, altered or used to accommodate or make provision for more than one family on one lot, and the area of the lot shall be as follows:
(a) A minimum of fifteen thousand seven hundred fifty (15,750) square feet for a lot where sanitary sewers are installed and the street is paved, and with a minimum frontage of ninety feet.
(b) A minimum of fifteen thousand seven hundred fifty (15,750) square feet for a lot where a septic tank is required or installed, and with a minimum frontage of ninety feet. (Ord. 100-1996. Passed 2-23-98.)