Award-winning custom residential and historic preservation firm at 5645 La Jolla Blvd, La Jolla, CA 92037, led by principal architect Ione R. Stiegler, FAIA. Founded in 1989, IS Architecture has earned over 75 local and national design awards, including a Best in American Living Home of the Year and a Gold Nugget Grand Award for Best Custom Home. Stiegler specializes in adaptive reuse of rare buildings and coastal construction challenges — technical, structural, and agency review work that La Jolla's hillside and oceanfront lots demand. Construction costs on IS Architecture projects typically run $500K to $5 million. The firm's historic restoration expertise complements practices like Arista Architects on Fay Ave, another 92037 firm with preservation credentials, and pairs naturally with experienced builders such as Nau Builders for ground-up construction.