On all corner lots, the depth of all yards abutting on streets shall not be less than the minimum front yard depth required on all adjoining interior lots fronting on such street. However, provisions of this section shall not apply so as to reduce the buildable width to less than 50% of any lot less than 100 feet in width. No corner lot setback shall in any case be less than 20 feet unless otherwise permitted in this chapter.

Where the corner lot abuts interior lots located in an adjoining zone having lesser front setback requirements, buildings may assume the minimum front setback dimension of the adjoining zone only if the adjoining zone is immediately adjacent and contiguous to the property and the proposed building is to be situated within 100 feet of said adjacent zone.

Lot lines of corner lots that are coexistent with side lines of abutting lots shall be considered side lines.

Lot lines of corner lots that are coexistent with rear lines of adjoining lots shall be considered rear lines.

Lot lines of corner lots that are coexistent with lot lines of adjoining corner lots shall be considered side lines.