15 Underhill Road blends mid century charm with stylish modern comfort in Mill Valley's sought after Scott Valley neighborhood. This beautifully updated home offers 4 bedrooms, 2.5 bathrooms, and approximately 2,515 sq ft of thoughtfully designed indoor/outdoor living, all on one level. Vaulted ceilings and generous windows in the living room and dining room fill the home with natural light, while the original narrow plank white oak floors and double sided fireplace add warmth and character. The remodeled kitchen features contemporary finishes, newer stainless steel appliances, and a layout opening directly to the family room, where a second fireplace creates a cozy, inviting atmosphere. The living, dining and family rooms offer direct access to two separate decks, making for seamless indoor‑outdoor living. The private, tiered backyard boasts a patio/deck, ideal for al fresco dining, and a flat turfed play area, providing the perfect space for play, recreation, or simply enjoying the outdoors. Located just moments from the Scott Valley Swim & Tennis Club, Edna Maguire Elementary School, and a short distance from Mill Valley's beloved shops, dining, and scenic trails, this special home offers an exceptional blend of comfort, style, and convenience in one of the area's most desirable neighborhoods.