Joseph Eichler was a real estate developer and one of the most influential advocates of modern architecture. Eichler built over 11,000 homes in California with a little more than 175 located in 3 area’s in Concord CA. Modernist architecture fans should keep an eye on homes located in Rancho Del Diablo Eichler Tract, West St. Eichler Home Tract and Wilson Ln. Eichler Homes Tract. While these mid-century are highly desirable, the Concord Eichlers’ home start in $600,000’s. View an original owner home that just sold in August ‘15.