JCM Partners owns about 45 properties, including apartment communities (containing a total of about 5,000 units), one multi-tenant office/retail property, office properties, and industrial properties. Nearly half of JCM Partners' residential properties are located in Sacramento County; the remainder are in San Joaquin, Solano, Stanislaus, and Contra Costa counties. JCM runs Rent-One.com -- an online apartment rental guide.