A. In the event any lot has on it a building being used as a temporary dwelling and the owner desires to build a permanent dwelling on another part of the lot, which permanent dwelling would cause the intensity of use provisions to be violated, he may be granted a special permit by the building inspector to construct such permanent dwelling upon condition that the temporary dwelling be vacated or converted to a conforming use within thirty days after the completion of the permanent dwelling. In the event such is done, it shall be a violation of this title for the temporary dwelling to be occupied as a dwelling beyond the period of thirty days allowed in the special permit.
B. Single-family homes may be erected on a lot of record in the "A" Single-family dwelling district where the lot contains a permanent dwelling, located entirely on the rear half of the lot of record, on or before February 12, 1971; provided, however, that a lot area of four thousand square feet or more be provided for each house; provided, that the construction of the additional house be completed not later than five years after February 12, 1971; and provided further, that the additional house comply with all yard regulations. (Prior code § 11-3-7 (a) (11, 12))