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Our objective is to create an inspirational and functional environment for each client's specific needs. The built or manipulated environment should remain in balance with the natural and surrounding environment. This Organic Design philosophy, developed during the Modernist Movement, can take form in any Design Vernacular desired. Responsible architecture is not limited to a particular design style. It should respond to programmatic necessity and its surroundings while providing innovative interpretation.


David C. Harvey and Dawn W. Harvey, a husband and wife design team, established D&D Harvey Architects in 1995 after interning and working together since 1989.


The small firm, located in Sag Harbor, NY, designs and builds projects primarily on Eastern Long Island.  David, a graduate of the University of Miami 1989, and Dawn, a Syracuse University graduate 1991, are both licensed architects, each with their own diverse backgrounds.



We are prepared for 21st century realities. We offer our clients high-performance buildings with superb indoor-air quality and low environmental impact. We build Energy Star rated houses as required by Town of Southampton, and we can increase the quality and value of your investment by getting your project certified under two of the leading building standards - Passive House and LEED. Our long-term collaborator, Margarita Ganeva is an internationally Certified Passive House Designer and LEED AP who can provide energy modeling and thermal bridge calculations, recommend best practices and sustainable materials for your project.

PASSIVE HOUSE is an international performance-based building standard, demonstrating 90% energy savings in comparison to average buildings. Based on decades of research in building science and accurate energy modeling, Passive House standard has a proven

track record of built projects performing as predicted. With an impressive maximum annual heat demand of 4.75 kBtu/sf, Passive House is the easiest way to achieve Net Zero energy performance.​

ENERGY STAR certified new homes are independently verified to be at least 15% more energy efficient than a home built to the 2009 International Energy Conservation Code, and feature additional measures that deliver a total energy efficiency improvement of up to 30 percent compared to a typical new home.

LEED is an internationally recognized building program with a comprehensive sustainability approach. According to the project type, buildings are assessed based on a combination of mandatory and elective measures in a number of different categories - Sustainable Sites, Water Efficiency, Energy and Atmosphere, Materials and Resources, Indoor Environmental Quality etc. Several certification levels are awarded - LEED Certified,  LEED Silver, LEED Gold and  LEED Platinum.


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Tel: (631) 537-7640

PO Box 3268 Sag Harbor, NY 11963

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