Architectural executive residence offering approx. 4,000 sq. ft. above grade plus 1,850 sq. ft. finished lower level with private entrance, set on a rare, extra-wide, deep, mature, and private park-like lot in London’s prestigious Westmount Hills. A dramatic glass-railed staircase and double-height foyer open to a vaulted great room with floor-to-ceiling windows and sleek gas fireplace. A formal dining room enhances flow off the gourmet kitchen, which impresses with a large island, dual Frigidaire Professional 36″ fridge/freezer, induction cooktop, double wall ovens, built-in fridge drawers, appliance pantry, and walk-in pantry with full fridge, sink, and microwave drawer-all overlooking the 2024 resort-style heated pool (8-ft deep end, automatic retractable cover). The bright main-floor family room connects seamlessly to the kitchen and features a cozy gas fireplace-ideal for gatherings and relaxed living-with a heated and cooled sunroom off the family room offering backyard and pool access, perfect for entertaining. Also on this level: private office/den and a full bath with laundry and direct pool walkout-perfect for swimmers and guests. Upstairs, the vaulted primary suite offers gas fireplace, balcony, walk-in closet, and spa ensuite with skyline views. The second bedroom has its own ensuite, while the third bedroom has a cheater ensuite (with laundry). Fourth Bedroom with double closet, vaulted ceilings and private balcony. The finished lower level includes a bedroom, bath, recreation and family zones with fireplace, pub-style oak wet bar, and garage access. Oversized 3-car garage with epoxy floors, 8-car driveway. Four fireplaces total. A truly exceptional residence uniting architectural presence, generous scale, and a rare extra-wide, deep, and mature private lot in one of London’s most sought-after neighbourhoods.