PURCHASE, NY | Five Acres | Formerly Two and Four Alyssa Lane A Rare Dual-Parcel Estate with Subdivision Potential Set on five beautifully manicured acres in coveted Purchase, NY, this extraordinary custom brick Colonial represents not only a world-class private estate but a compelling real estate opportunity. Originally recorded as two separate parcels two and four Alyssa Lane and subsequently merged into one expansive five-acre estate, the property carries the potential for future re-subdivision into two 2.5-acre lots, subject to Town of Harrison Planning Board approval. For the discerning buyer, this adds a rare layer of flexibility and long-term value that is virtually impossible to find in this market. A gated entry sets a grand tone upon arrival, opening to stained glass doors and a striking marble foyer with a sweeping staircase and sun-drenched interiors. Designed for both grand-scale entertaining and everyday living, the home flows seamlessly through a formal dining room, multiple sitting areas, a living room with fireplace, a wet bar, and a richly appointed wood-paneled library with its own fireplace. At the heart of the home, the designer gourmet kitchen outfitted with a custom herringbone marble backsplash, quartz countertops, handcrafted cabinetry, and an oversized center island with built-in refrigerator drawers. Top-tier appliances include a dual-fuel Wolf range with griddle, Sub-Zero refrigerator, Bosch dishwashers, and Wolf wall oven and microwave. A butler's pantry enhances both convenience and entertaining capacity while sliding glass doors open to a wraparound veranda overlooking the pool, spa, and cascading waterfall. The main level also offers a first-floor ensuite bedroom, two powder rooms, and a thoughtfully designed mudroom with built-ins connecting to the three-car garage. The primary suite is a private sanctuary unto itself featuring soaring ceilings with intricate moldings; custom architectural windows; a statement fireplace; dual custom walk-in closets with extensive built-ins; two full bathrooms; a steam shower; and dedicated wellness area. Four additional ensuite bedrooms; a flexible playroom or office; a full laundry room; and an additional bedroom suite above the garage complete the upper level. The walk-out lower level is designed for recreation and relaxation offering spacious living area; gym; game room; wet bar; wine tasting room; secondary laundry area designed for golf simulator use; summer kitchen with sliding glass doors opening directly to outdoor entertaining spaces. Outside,the grounds transform into private resort heated in-ground pool/spa dramatic stone waterfall fully equipped pavilion kitchen appliances oversized barbecue pizza oven basketball court tranquil pond stocked goldfish fountain winding pathways professionally designed putting green Multiple landscaped zones offer distinct areas privacy enjoyment throughout every season.A property of this scale quality optionality rarely comes to market.Whether purchased as singular private estate explored subdivision potential,this once-in-a-generation opportunity one Westchester's most prestigious communities.Subdivision potential subject Town Harrison Planning Board approval.Buyers conduct own due diligence.