Open House New York Weekend is the one weekend a year when the city opens buildings it normally keeps shut. The 24th edition runs Oct. 16–18, 2026, with about 300 sites across all five boroughs open 10 a.m.–6 p.m. each day. Most of them are free.
- Dates: Friday, Oct. 16 – Sunday, Oct. 18, 2026.
- Hours: 10 a.m.–6 p.m. daily; exact hours vary by site.
- Cost: free at most sites. Some are ticketed for capacity or security, and those are ticket-holders-only.
- How it works: many locations are “Drop-In” — show up during open hours, no reservation. Ticketed sites need a reserved slot.
- What you get into: new buildings reshaping the skyline, infrastructure facilities that keep the city running, parks, performance spaces, manufacturing workshops, and behind-the-scenes tours and talks, including places normally closed to the public.
- Follow-up dates to watch: the full festival lineup and ticketing information are released in September 2026 at ohny.org.
- Boroughs: sites are spread citywide, so the realistic plan is to pick one subway line and a handful of sites rather than chase all 300.
With three days and 300 sites, treating this as a checklist is the fastest way to enjoy none of it. Pick a borough, pick a line, and plan to actually spend time inside two or three buildings — then let the ticketed sites be the one thing you reserve the moment tickets drop. Everything else is walk-up.