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About Us

Established in 1973, Bernardon is an award-winning regional full-service architecture, interior design, and landscape architecture firm. We currently have offices in Wilmington, Delaware, West Chester, Pennsylvania, and Philadelphia, Pennsylvania. Our people and our process are responsible for delivering over 45 years of thoughtful design in a wide range of commercial and residential markets, including specializing in custom, high-end Single-Family design. Led by Principal Douglas Hertsenberg, AIA, the Residential Studio in our Wilmington office places the highest priority on the specific needs of each client in order to design a home that reflects the owner’s personality and lifestyle while still ensuring that the design responds sensitively to the existing topography and natural features of the site. Doug and his team have designed custom residences ranging in size from 2,000 SF to 22,000 SF throughout Delaware, Maryland, and Pennsylvania in locales ranging from the countryside to the seaside and everything in between. The long-lasting relationships we create with our clients are a testament to a process that starts with our ability to carefully listen to and understand your vision (DREAM); to use our skills and imagination to create your solution (DESIGN); and to foster a collaborative environment to meet and exceed your unique project goals (SUCCEED).

Services Provided

3D Rendering, Architectural Design, Architectural Drawings, Building Design, Custom Home, Green Building, Guesthouse Design & Construction, Handicap-Accessible Design, Historic Building Conservation, Home Additions, Home Extensions, Home Remodeling, House Plans, Landscape Plans, New Home Construction, Project Management, Space Planning, Structural Engineering, Sustainable Design, Interior Design

Areas Served

Aston, Boothwyn, Chadds Ford, Garnet Valley, Immaculata, Kennett Square, Linwood, Marcus Hook, Pennsbury, Pennsbury Township, Trainer, Village Green-Green Ridge, Audubon, Berwyn, Birchrunville, Caln, Chester Heights, Chester Springs, Chesterbrook, Cheyney, Downingtown, Glen Mills, Glenmoore, Kemblesville, King Of Prussia, Lenni, Lewisville, Lima, Lionville, Lyndell, Malvern, Mendenhall, Norristown, Paoli, Phoenixville, Pocopson, Rose Valley, Thorndale, Thornton, Uwchland, Valley Forge, Wagontown, West Chester, West Goshen, Westtown, Devault, Exton, Southeastern, Unionville, Philadelphia


The American Institute of Architects AIA Philadelphia

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Business Details

Business Name


Phone Number

(610) 444-2900


123 Justison Street Suite 101
Wilmington, DE 19801


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