Tag: ADU ordinance

The sizable impact of requiring Chicago homeowners to get special use approval to build an ADU

Show your support for a version of the proposed ordinance that enables equal access to ADUs in all residential zoning districts and does not have the carve out explained below by emailing your alderperson and asking that they support ADU expansion into every residential zoning district without special use approval.

It’s possible that the Chicago City Council votes to approve an ADU expansion ordinance that would require about 38 percent of small-scale residential property owners, specifically in RS-1 and RS-2 zoning districts, to obtain a special use from the Zoning Board of Appeals to build an ADU. Special use approval is intended for limited and certain businesses and building types that can have an adverse impact and may require mitigations that are reviewed and approved by the ZBA.

ADUs have not been demonstrated to have adverse impacts and this potential future requirement would impose burdens on a scale above and beyond anything else the Chicago zoning code imposes. A special use is described in the city’s code as having “widely varying land use and operational characteristics [and] require case-by-case review in order to determine whether they will be compatible with surrounding uses and development patterns. Case-by-case review is intended to ensure consideration of the special use’s anticipated land use, site design and operational impacts.”

Yet an ADU is a residential use; its operational characteristics could not be incompatible with other residential uses. This requirement would be extremely unusual and especially burdensome. There is only one other special use approval that a residential property owner would have to seek, which is to allow housing on the ground floor in B1, B3, C1, and C2 zoning districts.

Applying for a special use for a small home presents a major obligation to the property owner, and requires them to perform the following:

  • Submitting a full building permit application with plans and obtaining a “certificate of zoning denial” before being able to start this process.
  • Paying a $1,000 application fee to the City of Chicago.
  • Hiring an expert witness to write a report and provide testimony at the ZBA hearing.
  • Preparing the finding of fact, a report which (a) describes how the ADU complies with all applicable standards of the Chicago Zoning Ordinance, (b) says that the ADU is in the interest of the public convenience and will not have a significant adverse impact on the general welfare of the neighborhood, (c) explains that the ADU is compatible with the character of the surrounding area in terms of site planning and building scale and project design, (d) states that the ADU is compatible with the character of the surrounding area in terms of operating characteristics, such as hours of operation, outdoor lighting, noise and traffic generation, and (e) outlines that the ADU is designed to promote pedestrian safety and comfort.
  • Preparing the application (which is extensive).
  • Complying with onerous legal notification requirements including determining property owners of record within 250 feet of the subject property, paying for and posting public notice signs and ensuring they remain posted until the public hearing, and mailing notice letters to surrounding property owners within the 250 feet notice radius.
  • Presenting the project to the Zoning Board of Appeals at an undeterminable time during an 8-12 hour meeting in the middle of a Friday, possibly facing one’s neighbors who are present objecting to the project.

Not to mention, this will gum up staff time and expertise.

Scale of impact

I analyzed the number of small-scale residential-only properties in Chicago that would and would not be subject to the special use approval requirement in RS-1 and RS-2 zoning districts if that version were to pass.

The map below shows where the proposed ADU expansion would set a different standard for homeowners in RS-1 and RS-2 zoning districts than for homeowners in all other zoning districts. It covers large parts of 40 percent of the city’s 77 community areas (read more about my thoughts on this in my letter to the Chicago Sun-Times editor).

The table below shows the results of my analysis: the owners of nearly 171,000 small-scale residential properties in RS-1/2 zoning districts would be required to undergo a costly and difficult process that would likely result in burdens so great that very few families would actually be able to take advantage of having an ADU.

About the analysis

“Small-scale residential” comprises Cook County property classifications that represent detached houses, townhouses and townhouses, two-to-six flats, courtyard buildings, and small multifamily buildings, up to 99,999 s.f. with or without commercial space up to 35 percent of the rentable square feet.

The full list of property classifications:

  • 2-02
  • 2-03
  • 2-04
  • 2-05
  • 2-06
  • 2-07
  • 2-08
  • 2-09
  • 2-10
  • 2-11
  • 2-12
  • 2-13
  • 2-25
  • 2-34
  • 2-78
  • 2-95
  • 3-13
  • 3-14
  • 3-15
  • 3-18
  • 3-91

Additional dwelling units can help homeowners and make housing safer

A copy of my letter to the editor, as published in the Chicago Sun-Times. I had originally submitted this as an op-ed that was twice the length but I reduced it to 375 words at their behest.

Fran Spielman’s recent article “‘Bungalow Belt’ City Council members brace for battle over ‘granny flat’ expansion” didn’t address related positive impacts likely to result from allowing “additional dwelling units” (ADUs) citywide. I want to shed light on unmentioned benefits.

Ald. Marty Quinn cited a fire in an illegal attic apartment. A safety benefit of legalizing ADUs citywide is making it easier for homeowners to legalize and renovate parts of a house that were built without a building permit.

Photo of the print version of the letter, by J.A.

When City Hall discovers an unpermitted dwelling — say, after a fire — the homeowner must spend money to remove parts that make it a home (usually the kitchen) because location-specific zoning rules prohibit it from remaining in place. What if the homeowner could spend that money making the attic or basement apartment code-compliant and continue providing a home? Allowing ADUs citywide increases safety citywide.

Another ADU benefit is that homeowners can generate income to help pay their mortgage or to facilitate multi-generational households. Council members should consider how best to implement citywide ADUs so that those benefits accrue to homeowners equitably. A debate exists over whether to allow ADUs in all residential zoning districts “by right” or to require homeowners in the city’s RS-1 and RS-2 zoning districts to get “special use” approval from the Zoning Board of Appeals.

Getting that approval to build an ADU will create a barrier so high that many homeowners will be unable to adapt their property to fit their family’s needs. Special use applications require a $1,000 application fee, plus fees charged by attorneys and consultants (which, while not required, are essential to ensure a successful outcome).

Divergent modes of allowing ADUs — one for families in RS-1 and RS-2, and another for all other zoning districts — extend the right to the majority of property owners but not in one-fifth of the city’s land area. This could perpetuate unsafe homes and cause inequitable disparities in financial opportunities and impositions on homeowners to gain approvals that could be borne more easily by homeowners in Mount Greenwood (median income: $106,538; 83% of the population is white) than in Washington Heights (median income: $55,428; 96% of the population is Black). City Council should choose to level the playing field and allow all homeowners to benefit from the ADU expansion.

Steven Vance, South Loop

Prepared remarks: the ordinance to expand ADUs citywide has multiple benefits

Alongside representatives from CMAP, Community Investment Corporation and Preservation Compact, ULI Chicago, and the Chicago Association of Realtors, I also spoke at a subject matter hearing on June 11, 2024, to the Chicago City Council’s zoning committee about the necessity to expand accessory dwelling units to be allowed citywide. Read more about the proposed ordinance.

Hello, my name is Steven Vance. I am an urban planner and consultant in Chicago. I am also a member of Urban Environmentalists Illinois. I have been studying, promoting, and collaborating around ADUs for six years. I was on ULI Chicago’s task force, have presented to various groups about building an ADU, and created a free directory on ChicagoCityscape.com that lists local architects and companies who can design and build ADUs. 

1st Ward Alderperson La Spata comments on the proposed ADU expansion ordinance during the subject matter hearing.

Given that background of some of my ADU work I feel that I understand a lot of how the adoption of ADUs in the last three years has fared and can point out future benefits that the city will gain if the proposed ordinance is adopted. I will highlight some of those future benefits.

Removing the maximum coach house size cap. The proposed ordinance would change the cap on how much floor area a coach house could have. Allowing larger coach houses on larger lots will allow more family-sized units with two or more bedrooms. Additionally, larger coach houses can make them more cost effective to build, because of the high fixed costs in building a coach house of any size. The proposed ordinance could facilitate more family-sized coach houses than are currently being built.

Allowing ground level coach houses through the administrative adjustment for parking. The proposed ordinance would allow property owners to build a coach house at grade, meaning it can be accessible. This would make it easier for families to decide to build a small house for an aging family member, who may very well be the current owner, as well as put a dent in the dearth of accessible housing. A second benefit of this change is that ground level construction is significantly cheaper than building atop a garage.

Allowing all-residential buildings in non-residential zones to participate. The proposed ordinance would allow thousands of residential-only buildings that are in B and C zoning districts to add an ADU. The Institute for Housing Studies at DePaul University found that 25 percent of buildings with 5 or more units fit into this category but are currently ineligible. These are the building sizes that are most capable of adding two or more ADUs. If two or more ADUs are built, half must be rented affordably. Adopting this ordinance means those buildings would be able to add ADUs.

Allowing coach house and conversion units on the same lot can also be cost effective for property owners. Either one would likely require a water service or electric service upgrade so it makes sense to make one upgrade to serve multiple new homes.

I believe that the biggest gains in the city’s ADU policy will come from allowing them citywide, in all residential and mixed-use zoning districts. Citywide expansion makes it simpler for the departments to administer, makes all buildings capable of adding an ADU eligible to add an ADU, makes it easier for homeowners to add an additional home to fit their changing household needs, and lets other property owners add to the city’s housing abundance thereby slowing down rent increases that the city is experiencing.


Note: The plan, as explained in Crain’s and the Chicago Tribune, is to vote on the ordinance at the June 25, 2024, zoning committee meeting, and if approved there the City Council would vote at their July meeting. (City Council does not meet in August.)

Ald. Lawson re-introduces ordinance to jumpstart sagging ADU program

A subject matter hearing will be on June 11, 2024, at 10 AM (meeting details).

I wrote this summary of the ADU changes this proposed ordinance (SO2024-0008918, formerly O2023-2075) would implement (with my commentary in parentheses).

Before you read on, though, please sign the Urban Environmentalists Illinois petition to show your support for allowing ADUs citywide.

Interior of a coach house in Lakeview built in 2023.
  • It allows ADUs citywide (this is the most important change to speed up adoption)
  • Expands to B and C1, C2 zoning districts (this is important because there are thousands of residential-only properties that are incorrectly zoned in B and C districts which don’t allow ADUs)
  • It also allows ground floor commercial conversions but only if 40% of more of the property length is commercial space.
  • It allows a property owner to have both an interior ADU and a backyard house ADU (currently you can have one or more interior ADUs or a backyard house)
  • It removes the hard 700 s.f. cap on floor area in backyard houses. (Currently coach house sizes are limited to the lesser of 60% of the rear setback or 700 .s.f)
  • It allows property owners who want to build a coach house to ask the zoning administrator to waive parking requirements for the principal building. This would allow a property owner to reduce the number of existing parking spaces, allowing a coach house to be built as an accessible unit on the ground level. Ground-level coach houses will also be cheaper to construct!
  • It would require a special use from the ZBA to establish an ADU in RS-1 and RS-2 zoning districts. These are much less common than the other R zoning districts and 0 ADUs have been permitted in those districts since May 1, 2021. 
  • It allows the property owner OR the city to notify the alder of a proposed ADU permit application. 
  • It eliminates the need for the property owner to notify their two adjacent neighbors. 
  • It doesn’t change the affordability requirements when proposing to build 2 or more interior ADUs. 
  • It eliminates the restrictions in the 3 southern limit areas that limited the number of ADU permits per block per year (this restriction ended up having no effect due to little demand in those areas). 
  • It eliminates the requirement that to build a coach house at a 1-3 unit house it had to be owner occupied (only in the 3 southern pilot areas, again this restriction ended up having no effect due to little demand in those areas). 

The changes would take effect 120 days after passage. It’s no guarantee that all of these will remain in the final version!

The ADU program in Chicago needs this. As I pointed out in my comment to the Chicago City Council Committee on Zoning, Landmarks, and Building Standards, the number of ADU permits has been declining since December 2022.

Comment to Chicago’s committee on zoning about expanding ADUs

This doesn’t fully match with what I spoke at the Chicago City Council committee on zoning, landmarks, and building standards on April 16, 2024 (meeting agenda), because it was written for about two and a half minutes but due to the high number of public commenters Vice Chair Lawson (44th Ward) reduced everyone’s maximum speaking time from 3 minutes to 2 minutes so I made some on-the-fly cuts. Ordinance O2023-2075.

My name is Steven Vance. I am a Chicago resident and a land use consultant. In two weeks the city will reach the three-year anniversary of when Chicagoans could start applying for building permits to build accessory dwelling units, otherwise known as ADUs. Locally we call them garden apartments and coach houses.

In that time, the city has permitted approximately 237 projects comprising 275 new ADU homes. 75% of these are or will be in basements, and a little less than 20% are or will be in backyard or “coach” houses. 

11% of these homes are required to be rented at affordable rates set by the Department of Housing each year.

That’s 271 new homes that are or will be providing housing for family members, providing new income for property owners, and picking away at the city’s housing shortage of 120,000 homes. But the opportunity is not available to everyone, and the number of ADU permits issued each quarter has been declining since December 2022. 

The number of ADU permits has been declining. I include the graph here to illustrate my point but I did not present the graph during my comment.

City Council adopted five pilot areas, a limitation that doesn’t need to stick around. Hundreds of currently interested property owners are prohibited from building an ADU. Their current alternative is to undertake a costly zoning change process to gain the privilege of building one or two more units on their properties. (However, shoutout to the few alderpersons who facilitate this process on behalf of their constituents.)

I operate Chicago Cityscape, a real estate information website that also has advice on building ADUs and a tool to look up if a property is in an ADU pilot area. 

As of last week, people have looked up 815 addresses in 48 wards…but…70% of those addresses were not in a pilot area and those people will not be able to build an ADU at this time.

I believe those permitting and address lookup statistics show that ADUs, while representing less than 3% of new construction homes, are popular. They allow for Chicagoans to modify their properties to age in place, fund renovations and property taxes, or move a family member to be closer. Now is the time to expand this benefit to all of Chicago and I urge the City Council to drop the geographic ban as soon as possible.

Finally, Mayor Johnson’s Cut The Tape initiative includes citywide ADUs as a phase 2 strategy, so ADUs are something City Council should support. [This part was added last second.]