A rare gem in Kleinburg's exclusive enclave, 21 Coldwell Bay Circle offers over 3,500 sq. ft. of thoughtfully designed living space on a premium 40 x 105 ft lot. Built in 2022, this home combines elegance, functionality, and over $250K in premium upgrades, including a finished legal basement apartment with a private entrance perfect for rental income or extended family.Refined finishes define the main floor, with hardwood flooring, wainscoting, crown molding, and motorized blinds enhancing every space. The chef-inspired kitchen features Fisher & Paykel stainless steel appliances, a pot filler, waterfall quartz island, and built-in secondary stove, microwave and large walk-in pantry. The living and dining areas are designed for both comfort and sophistication, featuring a custom TV wall, electric fireplace, and chandelier. Upstairs, five spacious bedrooms offer the perfect retreat. The primary suite boasts double walk-in closets, coffered ceilings, motorized screen blinds, and a spa-like 5-piece ensuite with a freestanding tub and glass-enclosed shower. A Jack-and-Jill bathroom connects two bedrooms, while another upgraded 4-piece bath and a second-floor laundry room with an LG washer and dryer add everyday convenience.The fully finished basement apartment is bright and modern, with two bedrooms, two full bathrooms, a high-end kitchen with granite countertops and stainless steel appliances, and oversized windows. A separate 100-amp circuit panel and smart hydro meter allow for independent billing. Additional features include a mudroom, two coat closets on main floor, central vacuum, air conditioning, an irrigation system, and parking for six. No sidewalk. Ideally located minutes from Hwy 427, Kleinburg Village, Vaughan Mills, and top amenities, this is a rare opportunity for luxury living in a sought-after community.