R1 R2 R3 R4 R5

In the districts indicated, for residences on qualifying residential sites, no side yards shall be required. However, if any open area extending along a side lot line is provided at any level, it shall have a minimum width of five feet, measured perpendicular to the side lot line.

Furthermore, except as provided for by paragraph (c) of Section 23-331 (Basic side yard requirements in R1 through R5 Districts), where a building containing residences on an adjacent zoning lot has a side yard adjoining the subject zoning lot an open area with a minimum width of five feet, measured perpendicular to the side lot line shall be provided, and shall extend along the entire side lot line. Obstructions permitted pursuant to Sections 23-311 and 23-312 shall be permitted in such open areas.