Tucked along what many consider the most coveted, tree-lined street in Sycamore Park, 124 Sycamore Ave captures that unmistakable Father of the Bride magictimeless, warm, and effortlessly inviting. Set on a rare double lot, this home offers a sense of space and privacy that's nearly impossible to find in Mill Valley. A classic Ipe wood front porch welcomes you in, where all-day sunshine pours across the property, creating a bright, uplifting atmosphere from morning to evening. Inside, the scale and craftsmanship immediately stand out. A dramatic two-story entry and soaring 10-foot ceilings set the tone, while solid core doors and hardwood floors throughout speak to the home's exceptional build quality. Designed for both everyday living and entertaining, the elegant formal dining room pairs beautifully with a thoughtfully designed kitchen featuring a charming built-in banquette and an oversized walk-in pantry. The heart of the home opens seamlessly to the outdoorskitchen and living spaces lined with multiple French doors that invite you into a completely fenced, private yard, perfect for hosting, relaxing, or letting kids play freely. Upstairs, four bedrooms on one level offer the layout today's buyers crave, including three ensuite bedrooms for comfort and flexibility. With five bedrooms total, there's space for guests, a home office, or whatever your lifestyle demands. Adding even more versatility, the property includes a beautifully appointed ~450 sq ft guest unitideal for visiting friends and family, an au pair, or a private work-from-home retreatalongside a detached two-car garage that blends seamlessly with the home's classic architecture. And then there's the locationjust a short stroll to the vibrant Mill Valley Depot, where cafs, shops, and gathering spaces create a daily rhythm reminiscent of a European piazza. This is Mill Valley living at its best: classic charm, modern functionality, and a rare sense of spaceall in one of the town's most beloved neighborhoods.