Oct 18-19, 2025

NEW THIS YEAR!

Log in before you start saving sites and itineraries, and you’ll be able to access them across devices.
Visit one of our four Neighborhood Headquarters across the city to plan your day.
Plus, pick up a copy of The Reader's OHC festival guide for a site checklist and bingo card.

Open House Chicago (OHC), one of the largest architecture and urban exploration festivals in the world, returns to celebrate 15 years of architecture, culture and community. Use the CTA Rail Map (pdf) to discover neighborhoods across the city. This free public festival offers behind-the-scenes access to 200+ sites, including many not normally open to the public.

Be sure to take photos as you explore for a chance to win the OHC photo competition.