Unlock the City

Forget the Mayor, Open House New York holds the keys to the city.

Crains New York Business
Open House New York promotes unparalleled access to the city—to the places, people, projects, systems, and ideas that define New York and its future.

From the signature Open House New York Weekend festival to design-driven public programs and the dynamic Urban Systems infrastructure series, join us to take an inside look at how the city works.
Graphic by Alfalfa Studio

OHNY Weekend: A public celebration of New York and the “power of place”

I applaud OHNY’s leadership, staff, volunteers, and supporters for 20 wonderful years of celebrating the remarkable diversity, feats of engineering, and visionary people that define New York City.

Mayor Eric Adams

Three epic days of exploration, access, and discovery

Rooftop gardens. Design studios. Historic houses. Infrastructure tours. And more!

This October 21-23, the 20th annual OHNY Weekend welcomed over 20,000 visitors into 300 places across the five boroughs, spanning 120 neighborhoods and nearly 100 zip codes. We introduced a brand new lottery system for ticketed locations and filled over 8,000 slots across the three day festival.

To our partners, volunteers, supporters, and participants – thank you for believing in the power of an open city.

Annual Appeal

Your year-end donation helps us unlock doors across the city

DSNY Central Repair Shop and Artist Studio, Credit: Yi-Ching Lin

Over the past twenty years, through three mayoral administrations and countless changes to the built environment—from the proliferation of bike lanes to the rise of supertalls—Open House New York has steadfastly stood by its mission to promote broad, unparalleled access to the city. Through it all, your enthusiasm, energy, and robust engagement has made our work possible. 

If, over the last twelve months, Open House New York has helped you discover a new corner of the city, demystify complex infrastructure systems, or provoke new thinking about our shared urban future, please consider making a fully tax-deductible contribution today.

Upcoming Program

OHNY Stacks: Fifth Avenue with William J. Hennessey

Our popular book series returns for its third year! OHNY Stacks explores the unknown, the unseen, and the unnoticed aspects of urban life. On December 8, join us for the first virtual book talk of the season, Fifth Avenue: From Washington Square to Marcus Garvey Park, featuring author William J. Hennessey in conversation with OHNY board member Saundra Thomas.

In this virtual book talk with Hennessey, learn about the stories of buildings along the street from monuments such as Rockefeller Center, to the luxury stores of Tiffany’s, the cultural treasures along Museum Mile, and more.


Our volunteers are amazing!

Kingsland Wildflowers Credit: Ben Helmer

A huge thank you to the over 700 volunteers who made the 2022 OHNY Weekend possible. From helping us unlock doors across the five boroughs to sharing your love of the city with others, you are the hands and heart of OHNY Weekend.

Interested in volunteering with OHNY year-round? Contact volunteer@ohny.org.


Love New York? So do we.

The Morgan Library & Museum, Credit: Michael Lee

From program discounts to members-only events like our popular Summer Social, Open House New York helps you demystify the city and take part in a community of curious New Yorkers. Fully tax-deductible memberships start at $60 (Individual) or $110 (Dual).

I’m an Open House New Yorker because…

“I want to sneak into every building.”

– Marc N., Member

“I want to be involved with and included in the places in my city that go unnoticed or are inaccessible.”

– Diana Z., Member

“Open House New York gives you a key to places you would never discover on your own.”

– Dan H., Member

Urban Systems

Radical Knowledge

Library interior with shelves

How do libraries serve as community catalysts?

Explore the profound transformations underway for public libraries in New York and across the nation in the latest installment of Urban Systems, a themed series investigating the forces that shape the city.

Building Capital

From municipal bonds to affordable housing tax credits, highway construction to park development, the flow of financial capital underpins the design and function of the built environment, shaping who has access to opportunity—and who does not.

Launching in summer 2022, Building Capital: The Value of Place is a multiyear investigation into how different forms of capital—financial, cultural, community—determine quality of place and quality of life in New York.

OHNY Stacks

Virtual Book Talks

All the Queens Houses:
An Architectural Portrait
with Rafael Herrin-Ferri

The Black Experience in Design:
Identity, Expression & Reflection
with the Editors

Epidemic Urbanism:
Contagious Diseases in Global Cities
with Dr. Mohammad Gharipour and Dr. Caitlin DeClercq

Global Network

Open House Worldwide

Visitors in London explore and modern space
Visitors in Lagos exit a historic building

From Athens to Zurich, the Open House Worldwide network brings together 40+ cities to promote architecture, design, and urbanism. In 2019, almost 1 million people participated in Open House events with nearly 2 million visits to buildings enabled by more than 18,000 volunteers. Taken together, Open House Worldwide is the largest celebration of the urban landscape in the world. Learn more.

Kingsland Wildflower Rooftop, Credit: Ben Helmer
Get Involved


The enthusiasm and support of New Yorkers like you makes our programs possible.

Become an OHNY Volunteer to join a community of enthusiastic and curious New Yorkers!