Part One in a Series Over the years, the city government has amended the Philadelphia Zoning Code to include incentives to increase the amount of housing units as well as the size of such building structures. Over the course of several articles, we will be discussing the “zoning” bonuses a property owner can take advantage of when developing a property within city limits. This part delves into the Mixed Income Housing Bonus, Green Roof Bonus, and the Fresh Food Market Bonus.