Eichler was one of several builders in the initial single family neighborhoods in Foster City. As shown in these field photos for Neighborhoods 1 and 2, and Neighborhoods 3 and 4, the neighborhoods had a deliberately eclectic mix of architectural styles; in order to lessen the sense of tract-house uniformity, the Fosters selected several builders to construct houses simultaneously, and mixed them together in the same neighborhoods. One of those builders was Eichler, which by this time had become renown for its unconventional architect-designed modernist homes.
Recently I came across a series of floorplans for Eichler homes in Foster City. Each identifies the architect of record for the plan. Contrary to popular belief, Joseph Eichler was not an architect; he was a developer with a vision and an affinity for modernist design, and he commissioned a variety of architects to bring that vision to market.