Under contract-accepting backup offers. Welcome to Casa Della Fontana - The Fountain House. Nestled on the tranquil north end of Siesta Key, this gated waterfront estate is a blend of seaside serenity, architectural distinction, and lifestyle luxury. Perched on a deep, sailboat-accessible bayou that connects to the Intracoastal Waterway, the almost half acre lot provides generous room for outdoor living, boat docking, and privacy.Built by Magnum Builders, this residence was recently transformed ...Under contract-accepting backup offers. Welcome to Casa Della Fontana - The Fountain House. Nestled on the tranquil north end of Siesta Key, this gated waterfront estate is a blend of seaside serenity, architectural distinction, and lifestyle luxury. Perched on a deep, sailboat-accessible bayou that connects to the Intracoastal Waterway, the almost half acre lot provides generous room for outdoor living, boat docking, and privacy.Built by Magnum Builders, this residence was recently transformed through a multi-year, high-end renovation to blend modern amenities with timeless character. The home is engineered with concrete footings, steel pilings, and reinforced concrete/rebar, designed for storm resilience. A Spanish barrel tile roof (2024), hurricane-rated garage doors and a whole-house generator round out the safety and durability features. This residence spans 6,827? square feet of air-conditioned living space offering 4 bedrooms, 4 full baths, and 1 half bath. At the heart of the home is the great room, soaring to 20-foot ceilings, commanding sweeping water views, and anchored by a two-story library wall. A gallery and loft overlook the formal dining space, and elegant iron railings and hand-hewn wood trestles bring an artisanal, Old World feel. A hidden wood-paneled staircase adds a dramatic, secretive touch. The gourmet kitchen is outfitted with Wolf, Sub-Zero, and Miele appliances, quartzite countertops, a coffered ceiling, a waterfront breakfast nook, and a walk-in pantry. Hand-hewn beams extend throughout the kitchen and lanai, harmonizing the interior and exterior aesthetic. The primary suite is a sanctuary: two private balconies, dual bathrooms, a central walk-in shower with dual entry, and twin walk-in closets. The guest wing, with three bedrooms and three baths, provides privacy and independent access to the driveway. Additional interior amenities include a media/game room, office/library, elevator, high ceilings, built-in features, central vacuum, and smart home automation. Designed for entertaining and coastal living, the property features a heated/in-ground gunite pool with spa, a sizable lanai with kitchen and multiple alfresco seating areas. For boating enthusiasts, the dock features three lifts and docking for large vessels.Living here means effortless access to both island leisure and Sarasota urban life. You're just minutes from Siesta Beach's famed white sand, Siesta Key Village's shops and restaurants, and the art, culture, dining, and amenities of downtown Sarasota. The home's deep-water location makes boat outings to the Gulf a delight.Casa Della Fontana is more than a house - it's a waterfront masterpiece built for those who demand beauty, durability, and lifestyle in equal measure. With its structural reinforcements, state-of-the-art systems, and sophisticated design, it offers both peace of mind and the romance of island water front living.