Nestled among the winding, narrow streets of Berkeley, California, which curve past a pastiche of architectural styles, including the material opulence of the spare modern mansions belonging to the tech elite, Susan Filter and Peter Koch’s home stands apart.
Their apartment, one of three in a converted Mediterranean Revival boardinghouse built in 1909, is hidden away down a footpath in a neighborhood that architecturally mirrors the eclectic spirit of Berkeley. In the city where the Free Speech Movement took root, a vibrant intellectual and bohemian culture endures, thanks in part to couples like Filter and Koch, as well as to the authors Michael Chabon and Michael Pollan, the chef Alice Waters, and the economist Robert Reich, who live nearby. Koch, 81, is a revered master printer, book artist, and typographer;…