HOMEPROJECTSCONTACT US Play Video ABOUT O'HENNON BUILDERS Welcome to O'Hennon Builders, a leading Southern Maryland custom home builder. Now proud to be an Energy Star Partner. When it comes to custom built energy efficient homes, O'Hennon Builders is the best home builder choice for both quality and customer care. Since 1973 “JJ” has been working around Southern Maryland delivering satisfied customers their Dream Custom Homes! HOW WE WORK Services Provided: Accessory Dwelling Units (ADUs), Barn Design & Construction, Custom Home, Energy-Efficient Homes, Garage Building, Guesthouse Design & Construction, Home Additions, Home Extensions, Home Remodeling, New Home Construction, Pool House Design & Construction, Project Management, Deck Installation, Porches, Fence Installation, Pergola Installation. Areas Served: Calvert County, Charles County, St. Mary's County. FEATURED WORK VIEW PROJECTS REVIEWS After a long search for our dream home (one level, basement, privacy, large garage), we contacted O'Hennon Builders. They had a beautiful house plan that they were able and willing to work with us to make a perfect home. A truly customized home. They worked on every little detail with us. It was a unique experience! We would highly recommend this company. Houzz User GET PROFESSIONAL HELP TODAY GET A FREE QUOTE Dunkirk, Maryland 20754, United States (443) 234-0855 kathleen@ohennon.com POWERED BYHouzz Privacy