Contact Us:


20 West 20th Street #803
New York, NY 10011

About TADA:

TADA is a vertically integrated Design + Development group founded in 2012 by Tim Dumbleton.  TADA connects all the parts of development into a single coherent team with capabilities to work in all areas.

In the 4+ years since its founding, TADA has purchased, designed, developed, constructed, managed + sold a half dozen properties.  We have designed new buildings, and taken old buildings apart and put them back together again.  We have assisted in the creation of spaces for two not-for-profit arts foundations; acted as the owners' representative for the construction of a new public park; assisted in the creation of the most high-tech stone fabrication facility in the world, and acted as the Executive Architect for Pritzker-Prize-winning architect Jean Nouvel. 

  • To the world of architecture, we aim to bring the experience of being owners.

  • To the world of development, we aim to bring the innovative care of being a designer.

We value long-term partnerships with our clients, investors, fellow professionals and staff.  Please feel free to contact us if we can help you with a project.    

(staff photos courtesy Angela Pham

Tim Dumbleton, RA, NCARB, TADA Founder

Tim has 20+ years of experience in design + construction, primarily with large projects in New York City. His experience includes built work in excess of $800M (hard costs). He has been involved in over $200M of development deals as well as serving a central role in several projects of cultural importance.  

Prior to founding TADA, Tim served as Design Director for Young Woo & Associates (2 Years); Managing Partner of TEN Arquitectos in New York and Mexico City (5 Years); and was a Design Associate at Skidmore Owings & Merrill LLC (5 Years). He was a graduate-level studio assistant at the University of Pennsylvania Graduate School of Fine Arts (1 Year).

Tim holds a Master of Architecture from Harvard University Graduate School of Design and a BA from University of Pennsylvania. He is a licensed architect in New York, New Jersey, Pennsylvania, Florida and Texas and is NCARB Certified.

Download Resume & Project Experience


Tomonori Tsujita, RA

Tomo joined TADA with in 2015 with 10 years experience in architecture design. He has extensive experience in high-end private residences in Manhattan, the Hamptons, Upstate New York, and Tokyo, but has also done work for government agencies such as the US General Services Administration.  

Tomo has a Master's Degree from Columbia University GSAPP, and a BArch from Carnegie Mellon. He recently served as a teaching assistant for an Urban Planning studio at Columbia GSAPP and continues to act as a guest juror for both graduate and undergraduate design studios.  

He is a registered architect in the state of New York and is fluent in English and Japanese.  


Monica Worthington

Monica, originally from Mexico City, is from a Real Estate family and grew up around construction. She joined TADA in 2013 after 8 years of experience: 6 spent in Design-Build, primarily for NYC restaurants, and 2 spent working with TEN Arquitectos, where she worked with Tim. Her previous work in Mexico City was also at the junction of architecture, construction and real estate development, which is why she feels right at home at TADA.

Monica holds a Master's Degree from Columbia University GSAPP and BArch from Universidad Iberoamericana in Mexico City. She is fluent in English and Spanish.


Mona Marin, Business Manager

Mona is responsible for maintaining the business operations of TADA. She keeps the bills paid and she keeps everyone organized. In keeping with our habit of wearing many hats, Mona also bids projects and helps with development financing and operations. 

Mona has a BS in Philology from the University of Bucharest and is fluent in English and Romanian.


Press about our work:


Jane's Carousel

Barry X Ball Studio



Naval Cemetery Landscape