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#505 In-person and Online: Residential Valuation V3: Cook County's Next Top Model


Dan Snow, Senior Data Scientist, Cook County Assessor's Office (he/him)

This event will be in person, but you can also tune in via our usual livestream. Doors open at 6pm. The livestream and announcements will start around 6:30pm CDT.

In-person: TeamWorking, 20 N Upper Wacker Drive, 12th Floor, Chicago IL. Enter the Civic Opera Building using the entrance in the middle of the block between Washington and Madison streets. Take the elevators to the 12th floor.

For more information on our return to in-person events, please see our return to in person blog post.

The Cook County Assessor’s Office (CCAO) is responsible for determining the assessed value of over 1.8 million properties. The Office uses computer-assisted mass appraisal to calculate values for residential properties: single-family homes, small multi-family apartment buildings, and condominiums.

Last year, the CCAO’s Data Department presented V2 of its residential valuation model, which was used to reassess the City of Chicago. The model outperformed previous CCAO valuation models, but still had some rough edges.

This year, the Data Department created V3 of its residential valuation model. The new model includes a vastly expanded set of input features (distance to CTA stops, more Census data, etc.), significantly improved methods, stricter accounting for different modeling experiments, and more. The result is the CCAO’s fastest, most accurate valuation model to date.

CCAO Senior Data Scientist, Dan Snow, will walk through V3 of the new residential model. He’ll cover initial 2022 results, describe the major changes from V2 to V3, discuss ongoing data issues and the plans to solve them, and provide a sneak peek at the Data Department’s future plans. If you’re interested in knowing how your property is valued or in housing, equity, machine learning, or real estate, attend this talk!

RSVP In-person attendees should RSVP beforehand. As occupancy limits permit, walk-ins will be allowed to enter.

Vaccination required In order to keep attendees safe, we will be requiring proof of vaccination at the door. A physical vaccine cards or picture of one will be accepted. If you are not vaccinated, you can tune in to the livestream.

Masks required Attendees will be required to wear a mask. We will provide additional masks if you forget yours.

There will be food! We will be serving chicken, chicken, steak and veggie tacos from Atolito’s Tacos!

ASL This event will have an American Sign Language interpreter.

Agenda and meeting notes
Sponsor Chi Hack Night Community
American Sign Language interpreter

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