The alternative headline is “Zoning assessment: how to propose a large building outside downtown Chicago when the current zoning code doesn’t typically allow that and the current zoning code goes against historical development norms for the city”.
I’ve said many times on social media how the Chicago zoning code doesn’t allow many extant buildings to be built because a zoning district that would allow the height, bulk, or density (“size”, for short) doesn’t exist anymore. All of those examples were outside of the downtown district because the downtown district still allows the size of all the extant buildings there.
I am going to describe how a building with the size of the proposed Old Town Canvas development is allowed outside of downtown (view the boundary). The development shows how to use multiple standards in the Chicago zoning code to build a lot of needed housing and serves as another example of the Chicago zoning code being much more restrictive than its previous iterations.
I won’t belabor the point any further, but it shouldn’t take “zoning cleverness” to build more housing in Chicago.
About the development
The Old Town Canvas development’s size – proposing 500 homes in a building 395′ tall – is largely possible because of two longstanding standards in the Chicago zoning code, neither of which are unique to the site – there are no loopholes here.
Those standards are:
- the “-5” zoning district’s allowance for nearly unlimited height if the property has a sufficient length of street frontage
- the ability to establish a Planned Development and shift zoning capacity from one parcel to another, even across a roadway
1. Height limits in “-5” zoning districts
In a B-5 or C-5 zoning district, the height limit is based on how much street frontage1 the property has. For a property that has 100 feet or more of street frontage the height limit is normally 80 feet. However, an exception2 in the zoning code allows buildings to “exceed the maximum height” if approved and reviewed as a Planned Development3.
This means there is no maximum height, but there are certainly influencing factors: the support of the local alderperson, the support of the city planning staff, and guidelines from the FAA.
2. Planned Developments can move zoning capacity between parcels
A basic zoning assessment of the parcels for the building results in an estimate that 179 homes would be allowed here. This is much fewer homes than previous Chicago zoning codes allowed, and much fewer homes on a similar sized parcel than the four nearest high-rises which have about the same or more than the proposed number of 500.
To be able to build 321 additional homes the developer has proposed incorporating the unused zoning capacity of Piper’s Alley, a mixed-use development, and Moody Bible Church, where the most recent community meeting to discuss the traffic study was held this month.
I can’t get into specifics because I don’t have knowledge of how much unused FAR and MLA per unit that each of those other properties can transfer. To do that I would need to see architecture drawings showing how much floor area the buildings have already.
In this case, the owners of the other properties must give their consent to the Old Town Canvas developer to be incorporated into a new – or in this case, an amended – Planned Development and show this consent to the City of Chicago4.
That process is essentially the definition of what many people would call “air rights” (which I think more specifically means being able to build above something, like a railroad or roadway) and municipal governments would likely call “transfer of development rights”.
Neither “air rights” nor “transfer of development rights” are commonly used terms in Chicago. There are several buildings, however, that use air rights granted to them by the railroads that own the tracks under Riverside Plaza buildings.
In New York City, to explain an alternative implementation of TDR, development rights include the ability for owners of landmarked buildings and of buildings in special districts to transfer the zoning capacity beyond the geographic limitations of the Chicago Planned Development standards. For example, a landmarked theater in the Special Midtown District can be a “granting site” of development rights to a “receiving site” within the Theater Subdistrict.
Notes
- In some other jurisdictions height limit is based on street width, and in Chicago’s first zoning code height was based on building depth and how much each upper section was set back from the street. ↩︎
- See 17-3-0408-A[1] in the Chicago zoning code. ↩︎
- There are codified standards regarding height in the Planned Development section of the Chicago zoning code, starting with the guideline, “High-rise buildings or towers should respect the context and scale of surrounding buildings with setbacks at appropriate heights which will also reduce the apparent mass from street level.” Other standards for high-rise buildings within Planned Developments are found in 17-8-0907-C. ↩︎
- Section 17-8-0400 of the Chicago zoning code has a regulation affecting ownership and site control and how Planned Developments can have multiple owners controlling multiple sites. ↩︎