Welcome to 18 Plumas Avenue. This distinctive 5-bedroom, 3-bath Kott House offers a rare blend of Marin character, flexible living, and exceptional indoor-outdoor space, all moments from downtown San Anselmo. Step inside to a light-filled dining room with vaulted ceilings, framed on either side by the inviting living room and sunny kitchen. A large picture window brings greenery into the kitchen, while both spaces open directly to an expansive deck, creating an effortless connection to the outdoors. Two bedrooms and a full bath complete this level. Upstairs, the private primary suite feels like its own retreat, with vaulted ceilings, an ensuite bath, and beautiful views of the surrounding landscape. The lower level offers surprising versatility with two additional bedrooms, a bonus room, spacious family room, full bath, and laundry. With a private entrance and direct outdoor access, this level also offers exciting potential for a future ADU, guest quarters, or more independent living space. Outside, a charming fenced front patio creates a welcoming first impression, while the backyard unfolds into a private oasis with a pool, patio, lush gardens, and multiple spaces to entertain, play, garden, and unwind. An impressive collection of fruit trees includes three plum, two apple, two fig, mulberry, Fuyu persimmon, Meyer lemon, plus developing peach and cherry trees. Tucked along a quiet street that feels removed from the main path, the home is part of a warm and welcoming neighborhood. Originally designed by noted Marin builder Gerald C. Kott, the home reflects the character and adaptable design associated with Kott Houses. With flexible living spaces, abundant outdoor areas, a pool, established gardens, and a peaceful setting close to the shops, restaurants, and community of downtown San Anselmo, 18 Plumas is a truly special place to call home.