AREA DISTRICTS 41 



width outer and inner courts are subject to the less restrictive regulations 

 provided for such courts in C districts. (See Figure 154.) 



The E district regulations are particularly appropriate for detached 

 or semi-detached houses on lots 40 feet or more in width. In a residence 

 district a building on an interior lot with its porches, wings and accessory 

 buildings may not occupy for the first story more than 50 per cent of the 

 area of the lot, and may not exceed 30 per cent of the area of the lot above 

 the first story. For a corner lot these percentages are increased to 70 per 

 cent and 40 per cent respectively. For all buildings rear yards shall be 

 at least five inches in least dimension for each one foot of height and courts 

 and side yards at least two and one-half inches for each foot of height. 

 For a lot 50 feet or less in width courts and side yards shall be not less 

 than two inches in least dimension for each foot of height. In a residence 

 district the depth of the rear yard at the curb level shall be at least 25 per 

 cent of the depth of the lot, but need not exceed 25 feet. If the building 

 is set back from the street the required depth of the rear yard may be 

 correspondingly decreased, but not below ten feet. On at least one side 

 of every building in a residence district there shall be a side yard along 

 the lot line for the full depth of the lot. For any building not within a 

 residence district the depth of the required rear yard at its lowest level 

 must be at least 15 per, cent of the depth of the lot, but need not exceed 

 15 feet at such level. (See Figure 155.) 



It is so important to secure some segregated open space for the joint 

 play and recreational use of the residents of every section that is built up 

 with tenement or apartment houses that it is well worth while to grant 

 developers the option of building under less restrictive provisions as to 

 courts and yards if as a substitute they supply areas suitable for recreational 

 use. An arrangement is accordingly provided whereby an individual de- 

 veloper or group of property owners in a D or C district can by setting 

 aside 10 per cent of their land for joint recreational use, be relieved of 

 the court and yard requirements of the district in which they are situated 

 and have the right to follow the requirements of the next less restricted 

 district. The 10 per cent set aside for common recreational use must be 

 equal to at least 5,000 square feet and must be at least 40 feet in its least 

 dimension. This common space may be left in the center of the block or 

 it may be made up of any lots in the block or in an adjoining block that 

 are approved by the superintendent of buildings 1 as suitable for the joint 

 recreational use of the residents. 



1 Changed to Board of Appeals in Resolution of July 25. See sec. 13, par. (b) 

 and sec. 14, par. (d). 



