Located on a private lane in one of Ross's most sought-after neighborhoods, 16 Southwood presents an exceptional opportunity to enjoy effortless single-level living in the coveted flats of Ross. Recently upgraded and thoughtfully designed, this stunning residence offers 4 bedrooms and 3 baths, highlighted by an expansive primary suite and beautifully scaled living spaces filled with natural light. Designed for both comfortable daily living and elegant entertaining, the home features large-scale formal and informal gathering areas, an eat-in kitchen, dedicated office, two fireplaces, air conditioning, and abundant storage throughout. Seamless indoor-outdoor flow opens to beautifully landscaped grounds with mature plantings, expansive level lawn areas, and a sparkling pool creating a true private retreat. Additional amenities include a detached guest house ideal for visitors, a home office, or fitness studio, a separate garage, and generous off-street parking for up to five cars. Just moments from downtown Ross, award-winning Ross School, parks, and scenic trails, this rare offering combines privacy, convenience, and timeless Marin elegance.