Exceptional custom Colonial estate set on 3.59 private acres at the end of a quiet cul-de-sac, offering rare privacy and timeless elegance. Spanning 5,520 sq ft, this residence showcases a classic center hall design, 9' ceilings, and rich Brazilian cherry hardwoods throughout, complemented by refined finishes and impeccable craftsmanship. A traditional layout includes 5 bedrooms, 2 dedicated offices, and a fully appointed ADU with private entrance - ideal for guests, multigenerational living, or a sophisticated home business. The main level balances formal and informal living with gracious entertaining spaces, heated floors, and a beautifully designed kitchen featuring a Sub-Zero refrigerator and ILVE 48” range. Upstairs, the primary suite offers a serene retreat with fireplace and spa-inspired bath, while additional bedrooms and inviting landings provide comfort and flexibility. The daylight lower level features a media room, guest accommodations, and seamless access to the grounds. Modern systems include heat pump cooling, tankless water heater, and natural gas generator. Extensive CAT6 coax wiring, surround sound, and security infrastructure enhance today's connected lifestyle. A 910 sq ft 3-bay garage with 240V outlets supports a variety of needs. The grounds offer irrigation, abundant storage, and backs to protected green space with a seasonal pond. No HOA. Located in the sought-after Lake Washington School District.