Author: Steven Vance

Exploring Radish: a model for cottage courts from Oakland

One of the many benefits of allowing pocket neighborhoods and cottage courts is being able to share high land costs. That, and sharing child care duties, are primary reasons that Phil Levin and Kristen Berman created “Radish”, a pocket neighborhood in Oakland.

Phil founded Live Near Friends, a website advising people on which steps to take to eventually live near friends and family and live happier by focusing on the hard part of finding appropriate real estate, setting up community standards, and arranging rent and legal concerns. He also is a co-founder of Culdesac, in Tempe, Arizona, an apartment complex with a traditional design of close-together buildings and shops near transit.

Phil takes Kirsten Dirksen, who produces videos about uncommon homes, on a tour of Radish, where the viewer can meet the residents, and learn about the architecture of the buildings and outdoor space plus a little about the process to combine two lots into what he calls a “friend compound”.

I previously wrote about cottage courts and how the Chicago zoning code does not allow them, primarily by disallowing more than one house per property. For Chicago, cottage courts can additionally offer the benefit of achieving the same density as a series of two-flats – so as not to reduce the population or population capacity of a neighborhood – while responding to the demand for detached housing and yards – which are putting pressure on two-flats and leading to their deconversions or teardowns. Two-flats have been a typical way for Chicagoans to live in a multigenerational setting, something that cottage courts can also promote.

Radish comprises two properties that started with two existing apartment buildings and an existing backyard house. Levin et. al. added another backyard house (ADU), a small building for a coworking office and shared kitchen (called “Blueberry” on the site plan below), and an RV for housing guests. All of those additions encircle a large shared space with a grassy yard, communal and scattered seating, a fire pit, a hot tub, and a sauna, separated from the car parking area by a privacy fence.

The lot area of the two parcels is about 18,859 s.f. The site plan is from 2020 and the population count reflects that year. Site plan: Supernuclear

In total, there are eight dwelling units on the property in four houses on an 18,589 s.f. set of two parcels. That lot area is the equivalent of six standard size lots in Chicago, on which 12-18 dwelling units will typically be found. But, that large lot size is atypical for Oakland.

Another aspect of cottage courts is that they can facilitate sharing food, high-cost resources (like a hot tub), and child care. Phil, the other residents, and even former residents who live nearby and stop by during the filming, describe how the cooking and child care is shared in the video. Phil’s blog details how he and his wife, Kristen, “built Radish to be a great place to have kids”.

Stay tuned for another blog post on this topic. I worked with Jamin Nollsch to create a cottage court site plan specific for Chicagoans to pair with a memo and sample ordinance that I wrote to promote legalizing this form of housing and living here.

Zoning assessment: Old Town Canvas

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.

The Old Town Canvas development would replace the Walgreens building. The development’s size is in line with all the other nearby high-rise residential buildings.

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:

  1. the “-5” zoning district’s allowance for nearly unlimited height if the property has a sufficient length of street frontage
  2. 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

  1. 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. ↩︎
  2. See 17-3-0408-A[1] in the Chicago zoning code. ↩︎
  3. 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. ↩︎
  4. 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. ↩︎

Lake Calumet had a lot more water surface area 50 years ago

I visited Big Marsh Bike Park with a friend three weekends ago to ride mountain bikes on the single track, check out the park’s campsite, see if people were still drag racing on Stony Island Avenue (they were), and finally, try to get a sense of where the access trail from Pullman in the west will cross over Lake Calumet by viewing the “land bridge” from the air.

According to the “preferred alignment” map below, the future bike trail will cross the lake at the shortest opening where the spit is on the left. The photo is facing due west.

While researching the proposed multi-use trail, boardwalk, and bridge, I decided to look up historic aerial photos to try and understand when and where the land around the lake was filled in. (I think the Illinois International Port District is the proposer.)

The Lake Calumet diptych I made shows two aerial photos – taken from airplanes – of Lake Calumet in 1970 and 1995. The images come from the Chicago Metropolitan Agency for Planning’s collection of three decades of 6,300 aerial photos across the six country region.

In the 1995 image you can see the Harborside International Golf Center built on landfill (also in 1995), additional slips for ships, and other land and water feature additions and subtractions.

The two photographs were taken slightly offset from each other but I scaled and adjusted their alignments to match each other as best as I could.

Redeveloping a former Philips factory in Eindhoven, NL

Strijp-S is a new neighborhood in Eindhoven, just a few minutes bicycle ride from the main station and the pedestrian shopping street. It was formerly the home of a Philips factory – you know, the Dutch electronics company that makes hospital equipment, light bulbs, and shavers.

The factory as seen in 1979. I believe most of the buildings are still there and the Vertical Forest was built one a former surface parking lot or in place of the single-story buildings. Credit: Hans Aarts, Wikipedia

The building in the top photo is called “Trudo Vertical Forest”, a social housing development. Each one of the 125 apartments has a tree on the balcony and approximately 40 shrubs and plants next to the tree. I knew none of this when I visited in May 2023 with Mark W (@BicycleDutch).

Enjoy additional photos from Eindhoven, well-known amongst urbanists for the Hovenring bicycle bridge over a highway junction, on my Flickr.

The Brooklyn Tower is based.

Kudos to the developer and architects for finding a site and designing a beautiful building in downtown Brooklyn that can be seen from nearly everywhere. I have dozens of photos of The Brooklyn Tower, designed by SHoP Architects, from the north, east, south, and west.