We are a specialized design team focused on room additions accessory dwelling units (ADU) and remodels. Located in historic downtown El Cajon, California, ADU Design & Build, a subsidiary of Bayasi Engineering, is a specialized design team focused on room additions accessory dwelling units (ADU) and and remodels. It is our goal to take the complexity out of our clients renovations by assisting them in any and all steps of the design/build process. The staff, hired for their expertise in design, construction and customer service and lead by Dr. Ziad Bayasi-Structural Engineer, is fully committed to assessing client needs and providing them with an individually tailored product.

With competitive pricing and  unquestionable knowledge, the "room addition experts" are the right team for your next remodel. We offer quality engineering, creative design solutions, and essential building services for the expansion of your residence. Our designs can be found all over southern California and beyond.

Call us for a Free Estimate- (858) 231-1552