Construction’s areas of expertise. With offices in San Francisco and Pacheco, CA, Richlen Construction has won a contract award at the Alcoa Building from where it began its journey as a general contractor. From their building's basement, boiler and generator rooms, to their cooling towers and roof-tops, etc. Richlen Construction of San Francisco has provided commercial building Owners with construction services ranging from; MEP & Seismic Upgrades, Emergency Generator Replacement, Demolition, high rise Window Replacements, and much more!