http://www.storagepro.com. Self Storage Grass Valley CA. Call 530-798-4038. Springhill Self Storage. StoragePRO offers 17 storage facilities throughout Northern California. Antioch, Berkeley, Carmel, Carmel Valley, Grass Valley, Hayward, Lathrop, Livermore, Milpitas, Morgan Hill, Oakland, Oroville, Richmond, Sacramento (Downtown, Midtown, East) Salinas, San Francisco, Santa Rosa, Stockton Our mission is "making self storage work for you" by offering state-of-the-art public storage facilities with a wide variety of storage features. Springhill Self Storage: 150 Spring Hill Drive, Grass Valley, CA 95945.