Welcome home to 21833 Onawa Pl in Diamond Bar! Peaceful and quiet, this cul de sac location amongst mature trees sits in the coveted Walnut Valley Unified School District and cannot be beat!! Single story stunner with 4 bedrooms, 2 baths and a primary suite with an en suite bathroom. Step through the double door entry into the light and bright front living room featuring bamboo floors, recessed lighting, window seat and cozy fireplace. Perfect spot for entertaining and enjoying family gatherings during the upcoming holiday season! Family room with dining combo await just off living room and kitchen, featuring newer sliding door and gorgeous views of the private backyard. Kitchen has plenty of storage, newer oven and beautiful views of the backyard. Individual laundry room with side yard access is just off of kitchen. Primary suite features an entry hall with double closets, an en suite bathroom, hardwood floors and plantation shutters. 3 additional bedrooms offer plenty of space for your growing or multigenerational family! Large driveway features plenty of parking and 3 car attached garage. Front yard offers low maintenance plantings and generous side yard has potential for trailer parking. Private backyard is your new retreat and features a quiet seating area, horseshoe area, tetherball area, lawn and bark areas and beds for planting. The possibilities are endless with this much space. There is room for a pool, room for a California outdoor room with entertainment area and kitchen, more garden beds and specialized plantings, or enclosures for pets! Over one half acre total. Several big ticket items are done, including newer hvac and a/c, newer windows, newer sliding door, oven and tankless water heater. Educational opportunities abound in Diamond Bar, with award winning Evergreen Elementary and Diamond Bar High Schools less than 1 mile away, and Chaparral Middle School less than 2 miles. The prestigious Claremont Colleges are a short 20 min drive and Mt San Antonio College is a short 14 min drive. Located 1 mile from the 57 freeway, and close to world class education, shopping parks, medical offices, restaurants, and specialty stores, this location is second to none!