Sunnyside 55+ Senior Apartment Homes 251 S Walnut AveLEASING OFFICESan Dimas, CA, 91773 View Phone 909-599-2121 251 S Walnut Ave, LEASING OFFICESan Dimas, CA 91773 View Website Experience & Reliability About Photos & Videos Connect with this Business: Send to My Email Send to My Phone Print this Page