Welcome to The Treehouse at Wales Pond -- a breathtaking 8,000+ SF custom-built sustainable retreat, privately set on 2.83 acres along the water's edge. This architectural masterpiece fuses Japanese and Spanish influences with organic materials and pond views from nearly every room. Expansive glass walls open to sun-drenched terraces, effortlessly merging indoor and outdoor living. Every space embodies intentional design from the vaulted great room with custom steel fireplace and floating staircase, 1st floor primary suite with Smart Glass solarium bath, and tranquil Yoga Studio with Tatami mats. This home offers 4-6 bedrooms, 6 full baths, a spacious media room, lofted library, and a full in-law suite on the lower level with private entrance. Outdoors, a heated pool & jacuzzi, yard, fire pit & pizza oven overlook Wales Pond, while private trails through abutting conservation land lead to the Village of Marshfield Hills. A true sanctuary ideally located minutes to the Atlantic Coast.