Architecture Firm Directory

1100 Architect


1100 Architect is the New York- and Frankfurt-based architectural firm founded by David Piscuskas, FAIA, LEED AP and Juergen Riehm, FAIA, BDA. 1100 provides custom architectural design, programming, space analysis, interior design, and master planning services to public and private clients. The firm’s domestic and international work spans a vast array of typologies, including residences, educational and arts institutions, libraries, offices, retail environments, and civic facilities.

1100 Architect is known for works of architecture that are timeless manifestations of place, at once distinctive and modern while always thoughtful about site, setting, and environment. Fundamental to this pursuit is the belief that building design is a progressive process informed by client aspirations, site, history, available resources, and time.

We believe that design can motivate and inspire users, and make an affirmative, lasting impact on individuals and communities alike. The studio avoids dogmatic structures, instead favoring a careful consideration of light, material, and detail that is specific to the nature of each project. The end products are functional, beautiful, innovative, and sustainable spaces that elegantly integrate into their surroundings.

Our unwavering dedication to design excellence and community service is supported by advanced thinking in sustainability and high-performance design. Based on our experience designing projects both within and outside of the U.S. Green Building Council’s LEED requirements, we view good design and environmental sustainability as interconnected elements of a thoughtful, responsible project.


475 10th Avenue, 10th Floor
New York, NY 10018
Tel: 212-645-1011
Fax: 212-645-4670


Betty Gonzalez

Firm Established



David Piscuskas, FAIA, LEED AP

Juergen Riehm, FAIA, BDA

Susanne Milne, MAA

Ed Parker, AIA

Gunter Weyrich, Dipl.-Ing. Architekt


Architects: 43
Administration: 12

Total: 55

Example Projects

CLDC, Queens Central Library; 
Queens Public Library 
Jamaica, NY 
Completed: 2011
The CLDC is an addition to the existing Queens Central Library. The glowing facade is a beacon in the surrounding community and is elemental in increasing the visibility of the library.

New York Public Library, Battery Park City; 
New York Public Library 
New York, NY 
Completed: 2010
Occupying the bottom two floors of a residential high rise development, the Battery Park City branch library was commissioned to meet the needs of a new and rapidly growing community.

Riverside Health Center; 
Department of Health and Mental Hygiene 
New York, NY 
Completed: 2014
The renovation and expansion of the Riverside Health Center promotes the health of the Upper West Side community through the development of architectural solutions that encourage physical activity.

Main: East Side Lofts; 
Frankfurt am Main, Germany 
Completed: 2015
Main: East Side Lofts is a mixed-use building composed of two parts: the renovation of a neoclassical building that was only half constructed and a contemporary addition of equal size.

Water Mill Houses; 
Water Mill, NY 
Completed: 2003
Distributed across fifteen acres of wooded land, this family retreat consists of a main house, pool house, guesthouse, bunkhouse, and garage.

House in Florida; 
Palm Beach, FL 
Completed: 2012
This single-family residence was designed with modern simplicity and elegance. Strategic landscaping enhances street front privacy, while the rear of the house opens up to the backyard.

Manhattan Triplex; 
New York, NY 
Completed: 2011
Originally three separate apartments, this modern manifestation uses refined details and neutral colors to create a cohesive environment. AIA NY Chapter Design Awards, Interiors Merit Award, 2012.

Carriage House; 
New York, NY 
Completed: 2003
In this renovation of a Greenwich Village carriage house, 1100 created an interior that is open, warm, and modern. The space facilitates entertaining & accommodates the art collection of the client.

Zalando Outlet; 
Frankfurt am Main, Germany 
Completed: 2014
Online clothing retailer Zalando has enlisted 1100 to design a new, flagship outlet store in Frankfurt am Main. Much of the interior was stripped down, resulting in a minimalist loft-like environment.

Brand New School LA; 
Los Angeles, CA 
Completed: 2012
For the West Coast office of Brand New School, an advertising and interactive media studio, we transformed two adjacent former auto repair shops into an open, collaborative work environment.

Type of Work

Criminal Justice/Correctional
Educational Facilities
Health Care/Medical
Institutional Facilities
Office Building/Commercial
Public Work
Residential (Multi-Unit)
Residential (Single Family)

Long Island House

Downing Street Townhouses

House in Florida


AIA New York Chapter
536 LaGuardia Place
NY, NY 10012
(212) 683-0023

Gallery Hours
Mon-Fri: 9am to 8pm
Sat: 11am to 5pm

Office Hours
Mon-Fri: 9am to 5pm