Welcome to 699 Ballycastle Crescent, a stunning masterpiece & exceptional custom-built 5 bed/5 bath estate home nestled on a premium pie shaped lot in the highly coveted Emerald Creek Estates. Backing onto tranquil green space w/ no rear neighbours, this impressive residence offers nearly 5,000 sq. ft. of beautifully finished living space, combining timeless elegance w/ outstanding functionality. Set within one of Ottawa's most prestigious communities, renowned for its mature landscaping, estate-sized properties, and architecturally distinctive homes, this property offers a rare blend of peaceful seclusion & everyday convenience. Designed for entertaining & comfortable family living, the main level showcases elegant formal living & dining rooms, curved staircase, welcoming family room anchored by a wood-burning fireplace, and a chef-inspired kitchen featuring granite countertops, island, premium appliances and custom cabinetry. A built-in bar, four-season sunroom & screened-in porch create seamless indoor-outdoor living while overlooking your private backyard retreat. Step outside to discover your own resort-style oasis complete with a sparkling saltwater pool, lush landscaping and uninterrupted views of the surrounding green space. The second level offers four spacious bedrooms, incl. two w/ private ensuites and walk-in closets, an additional full bathroom, and the convenience of second-floor laundry. The fully finished walkout lower level provides exceptional versatility, featuring in-law, nanny, or teen suite potential w/ its own bedroom, full bathroom, spacious family room w/ gas fireplace & wet bar with fridge & sink-perfect for multigenerational living or guests. Additional features include hardwood flooring, 9-foot ceilings, a 3-car garage, in-ground irrigation system, and much more. Ideally located near top-rated schools, shopping, golf courses, transit, and major commuter routes, this remarkable property offers the lifestyle today's discerning buyers seek.