Except as hereinafter provided for in this section, structures or buildings and uses permitted in the district may be erected or established on any nonconforming lot, notwithstanding limitations imposed by other provisions of this chapter. This provision shall apply even though such lot fails to meet the requirements for area or width, or both, that are applicable in the district, provided that yard requirements, other than those applying to area or width, or both, shall conform to the requirements of the district in which the lot is located.