The regulations hereinafter set forth in this chapter qualify or supplement, as the case may be, the district use and area regulations appearing elsewhere in this title:

   A.   Permitted: Open or lattice enclosed fire escapes, fireproof outside stairways and balconies opening upon fire towers, projecting into a rear yard not more than five feet (5') are permitted.

   B.   Open To Sky: Each part of a required yard shall be open to the sky, unobstructed by other buildings or structures; however, a stoop may extend not more than four feet (4') into the required front yard. A paved terrace may project into a front yard for a distance not exceeding ten feet (10'). Such stoop or terrace shall be supported only by the front wall of the building.

   C.   Converted Dwellings: All single-family dwellings converted to multiple-family dwellings and all new multiple-family dwellings must conform to the following:

      1.   No existing single-family dwelling may be so converted if it contains less than one thousand (1,000) square feet of livable floor area per individual household.

      2.   No dwelling unit shall contain less than five hundred (500) square feet of livable floor area per individual household.

   D.   Uniform Setback Lines: Where a uniform setback line has been established or observed on one side of a street, no building shall be erected or structurally altered beyond such setback line.

   E.   Front Yard, Exceptions: In areas where some lots are developed with a front yard that is less than the minimum required for the district by this title or where some lots have been developed with a front yard greater than required by this title, the following rule shall apply: Any new building or addition in front thereof shall not be closer to the street right of way than the average of the front yard of the first building on each side within a distance of two hundred feet (200') measured from building to building, except as follows:

      1.   Buildings located entirely on the rear half of a lot shall not be counted.

      2.   If no building exists on one side of a lot within two hundred feet (200') of the lot in question, the minimum front yard shall be the same as the building on the other side.

   F.   Rear And Side Yards Adjacent To Alleys: In computing the depth of a rear yard or the width of a side yard where the rear or side yard opens on an alley, one-half (1/2) of the alley width may be included as a portion of the rear or side yard, as the case may be.

   G.   Through Lots: At each end of a through lot, there shall be a front yard of a depth required by this title for the district in which each street frontage is located, with the following exceptions:

      1.   Only one front yard need be provided on those through lots which abut on an expressway or major arterial as shown on the circulation element of the general plan or when the rights to vehicular ingress and egress to one of the streets has been abandoned or prohibited.

      2.   When only one front yard is required on a through lot as provided herein, a rear yard shall replace the normally required second front yard.

   H.   Structures Permitted Above Height Limit: The building height limitations of this title shall be modified as follows:

      1.   Chimneys, cooling towers, elevator bulkheads, fire towers, monuments, bell towers, penthouses, stacks, stage towers or scenery lofts, tanks, water towers, ornamental towers and spires, radio or television towers or necessary mechanical appurtenances may be erected to a height above that allowed in the district in which they are located, if approved by the council.

      2.   Public, semipublic or public service buildings, hospitals, sanatoriums, schools or churches when permitted in a district may be erected to a height exceeding the height allowed in the district where they are located if approved by the council. (1971 Code)