Black Mountain Properties, LLC Since its founding in 1937 in San Carlos, California, Black Mountain Properties has grown along with the commercial real estate industry, evolving from its simple start to its present-day status as one of Northern California’s most respected family-owned property development and management firms. Our tenant experience range is broad; it includes members of the Fortune 500, non-profits, government organizations, retail and service firms, as well as small boutique companies and technology start-ups. We help each of them locate and enjoy the right facilities for their unique operations, in the most efficient manner. Helping them along their way by providing valuable services and improvements, as well as sound advice is part of our commitment to their success and growth.