Chicago's weekly event to build, share & learn about civic tech

Next Chi Hack Night All events »

6:00pm Tuesday, August 16, 2022

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

The Cook County Assessor’s Office (CCAO) is responsible for determining the assessed value of over 1.8 million properties. 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, significantly improved methods, stricter accounting for different modeling experiments, and more. The result is the CCAO's fastest, most accurate valuation model to date.

Details TechNexus Livestream @ 6:30pm Agenda
In-person and Online: Residential Valuation V3: Cook County

Last Chi Hack Night Past events »

7:00pm Tuesday, August 9, 2022

#504 Online: Open Hack

There will be no presentation this week. Instead, we're going to have an Open Hack. Join our 7pm open Zoom call for introductions, socializing, announcements and breakout groups.


Upcoming Events Past events »

Tuesday, August 23, 2022 7:00pm Online: TBD
Tuesday, August 30, 2022 7:00pm Online: Amira Kefi, Saving Our Youth from Prison via Education
Tuesday, September 6, 2022 6:00pm In-person and Online: Tonika Lewis Johnson, Folded Map

Latest blog post All posts »

Chi Hack Night #500 Call for Speakers

Chi Hack Night #500 Call for Speakers

Jun 17, 2022 by Derek Eder

July 12, 2022 will mark the 500th episode of Chi Hack Night. That’s 10 years! For this very special in-person hack night, the presenters will be YOU! We’re bringing back LIGHTNING TALKS from members of our community. Your prompt: How has Chi Hack Night changed you or your organization?

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Join us remotely every Tuesday from 7-10pm on our YouTube livestream and Slack channel to hear from amazing speakers, and learn by doing! Everyone is welcome!

We are a group of thousands of designers, academic researchers, data journalists, activists, policy wonks, web developers and curious citizens who want to make our city more just, equitable, transparent and delightful to live in through data, design and technology. More about us »

Have a talk you'd like to give at Chi Hack Night? Learn more about speaker submissions »

Join our community

Chi Hack Night is a central hub for Chicago's civic tech community. Here's the three best ways to get involved:

1. Go to Chi Hack Night. We meet every Tuesday at 7pm

2. Subscribe to updates on upcoming speakers and events

3. Browse our weekly breakouts to find your group


Chi Hack Night is a non-profit organization, run by our Board of Directors and supported by our amazing sponsors and donors.

Is your organization interested in becoming a Chi Hack Night sponsor? Drop us a line!