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ARNOLD ASSOCIATES, landscape architects and site planners established in Princeton & Trenton, NJ in 1971 by Henry Arnold (emeritus), has executed over 900 commissions. The Firm's work covers a wide range of site conditions and client needs in the United States and abroad. Our disciplines cover a range of services, including site layout, irrigation, drainage design, vehicular and pedestrian circulation, grading, and planting design. The Firm specializes in urban tree planting techniques for sustainable urban street trees. These disciplines have been applied in the context of urban spaces, parks, commercial, mixed-use developments, residential, retail, institutional, and civic projects.
The office is a partnership organized to allow the Principal's involvement from conceptual design through project completion. The policy of maintaining highly trained in-house staff and associating with the best specialist consultants has proven an effective way to secure both operational efficiency and design excellence.
Past commissions vary in scale and complexity, ranging from major open spaces and memorials on the Washington, DC Mall, to the more restrictive design for a small interior plaza in Rockefeller Center, Manhattan. The large number of these projects that have been built and their durability provide a measure of the firm's effectiveness as rigorous professionals and artists.
About Us
STEPHEN LEDERACH, ASLA Principal
Stephen Lederach, ASLA, has managed and designed landscape architecture and urban-design projects throughout the United States and internationally. Selected projects include Hoboken’s South Waterfront in New Jersey, MetroTech Center in Brooklyn, New York, and the Korean War Veterans Memorial in Washington, DC.
His work explores the relationship between people and the built and natural environment, emphasizing the creation of engaging, resilient urban places. Since joining Arnold Associates in 1988, Stephen has helped advance the firm’s innovative urban tree-planting details and methods, supporting the establishment and long-term health of trees in demanding urban conditions.
Stephen earned a Bachelor of Science in Ornamental Horticulture from Delaware Valley University and a Master of Landscape Architecture from Virginia Polytechnic Institute and State University (Virginia Tech). A registered landscape architect in multiple states, he frequently lectures and teaches landscape architecture and planting design at academic and professional institutions.
HENRY F. ARNOLD, FASLA, Founding Principal Emeritus
Henry F. Arnold, FASLA, earned a Bachelor of Landscape Architecture from the University of Pennsylvania’s School of Fine Arts and also studied forestry at Pennsylvania State University. Over a career spanning more than five decades, he practiced for ten years in the Vermont office of renowned landscape architect Dan Kiley, serving as an associate and partner.
In 1971, Arnold established Arnold Associates in Princeton, New Jersey. Working subsequently with partner Stephen Lederach, he developed a practice centered on urban landscapes and innovative techniques for establishing healthy, long-lived street trees. Arnold Associates’ work encompasses parks, public spaces, commercial and mixed-use developments, institutional sites, and civic projects in the United States and abroad.
Henry was named a Distinguished Artist by the New Jersey State Council on the Arts and is a Fellow of the American Society of Landscape Architects. His book, Trees in Urban Design, received the American Publishers Award for the best book in architecture and urban planning in 1980. His competition work also received recognition in the Vietnam Veterans Memorial Competition in 1981 and the Pershing Square Competition in 1986.
A registered landscape architect in multiple states, Arnold has lectured widely, taught urban design at Pratt Institute, and advised major developers, corporations, and Singapore’s Ministry of National Development.
