Pursuant to the provisions and procedures of this chapter, a nonconforming use may be enlarged or extended within a building or on the same lot provided that the more restrictive requirements of either the district involved or the proper district for the use involved applies to such enlargement or extension; and provided further that all current development regulations are complied with, and that additional adverse effects are not created for abutting properties or the neighborhood, e.g., objectionable conditions, visual and noise pollution, vehicular traffic, dust, or street parking, and provided further that the provisions of this chapter are adhered to.