A Marin layout that's hard to find: a well-maintained, four-bedroom home, all on one level, that's close to Sun Valley Park, Andy's Market, and the award-winning Sun Valley Elementary School. Picture a Saturday at 15 Windsor Avenue, with sunlight filling a wall of glass while you pour coffee at the island and Mount Tam fills the window. The amply-sized bedrooms, two full baths (with tubs), and well-thought-out interior design is complemented by a host of life-enhancing features. Central A/C, a newer heat pump, whole-home air purification system, and the versatile two-car garage make everyday living easy. Tax records list 1,359 square feet, yet the open plan feels larger than that number, with the living room, dining area, and kitchen flowing together and a large, dedicated laundry room off the two-car garage, adding more functional space. Newly refinished wood floors, fresh paint top to bottom throughout, and a wood-burning fireplace give the main rooms their warmth and sophistication. The chef's kitchen is built for cooking and for company, with a four-burner Wolf range at the center and a prep island where you can chop, plate, and talk with guests at the same time. A built-in Sharp microwave, composite countertops, and ample cabinetry surround the work zone, and a Bosch dishwasher, a stainless-faced GE refrigerator, and recessed lighting complete it. The primary suite has its own bath and a large closet with built-in drawers, and three more guest bedrooms each have a closet with storage drawers and wall-to-wall carpeting. The centrally located guest bath was recently refreshed. Move outside to a rear patio area and newly enhanced landscaping, then climb the stone steps to an arbor with views of the surrounding hills. Sun Valley puts daily life within reach. You are close to the award-winning Sun Valley Elementary, the newly renovated Sun Valley Park, and Andy's Market for dinner ingredients, then head to Fourth Street for Sol Food, Pink Owl Coffee, and Burren House, or drive a few minutes to San Anselmo. Sporting trails start nearby, the beach is about 15 minutes away, and Highway 101 is easy to reach. Envision yourself here - we're making access for touring purposes very easy.