Commerical Lot opportunity in the city of san Bernardino. CG-1 Zoning: This zone is intended to provide for the continued use, enhancement, and new development of retail, personal service, entertainment, office and related commercial uses along major transportation corridors and intersections to service the needs of the residents; reinforcing existing commercial corridors and centers and establishing new locations as residential growth occurs. Additionally, this zone permits a maximum density of 47 units per net acre for senior citizen and senior congregate care housing.