Zoning Philadelphia RM1,RSA5,CMX2.5

[Nathan Shultz]

Hi,

Had a few questions about different zoning restrictions in Philadelphia, would greatly appreciate any input. Firstly, the zoning RM1 or RSA5 both require a minimum lot width to be 15 feet & 1440 sf. Are these building requirements or simply requirements needed to switch the zoning to one of these categories. I find blocks of homes zoned in either RSA5 or RM1 that don’t have these measurements. 

Additionally, the zoning guide states “*A lot containing at least 1600 sq. ft. may be divided into lots with a minimum lot size of 800 sq. ft.” Why would anyone divide the lots this way if this would prohibit them from building on it due to the 1440sf requirement?

Lastly, regarding CMX2.5 “*Residential uses are prohibited along the ground floor frontage.” what is considered residential uses ? Can I build a fitness center for the exclusive use for the residents of that building ? Would that be a residential use ?

Many thanks, Nathan