Section D-805.1, which denotes the Wesley Heights Overlay map entitled "Required Front Yard Setbacks” for the R-14 and R-15 zones, illustrates the required front yard setback dimensions for these areas: 

D-805.1 All residential buildings shall have a front setback equal to or greater than the average setback of all structures on the same side of the street in the block where the building in question is located. The required setbacks are depicted in the map entitled, "Required Front Yard Setbacks," which is a part of this zone and located in the Office of Zoning and in the Office of the Zoning Administrator at the Department of Consumer and Regulatory Affairs. 

A PDF of the Map is attached to this interpretation for reference. 

The Map denotes the required front yard setbacks in feet by a number inside of a circle for each corresponding block.