Welcome to 917 DeKalb Pike - a rare, fully upgraded stone estate offering exceptional space, privacy, and versatility on over 3.5 acres in prestigious Lower Gwynedd Township and the highly-rated Wissahickon School District. Set well back from the road and accessed by a private gated drive, this fully fenced-in property delivers a true estate setting with the convenience of nearby major routes, regional rail, premium grocers like Whole Foods, and the vibrant dining and shopping scene of Ambler. The main residence, a classic early-20th-century stone Colonial, blends timeless architectural character with thoughtful expansions and more than $500,000 in modern upgrades. The restored interiors showcase original hardwood floors, detailed millwork, and gracious entertaining spaces, including a sweeping formal living room with four fireplaces, expansive windows, and elegant flow between rooms. The home offers over 6,100 total square feet of living space (4,941 above grade plus a finished basement) with seven bedrooms and multiple flexible-use areas ideal for today's needs, whether for remote work, creative studios, or multi-generational living. At the heart of the home, the expanded chef's kitchen features custom soft-close cabinetry, a massive center island, granite countertops, a farmhouse sink, high-end smart appliances, and a walk-in pantry with custom shelving, seamlessly connecting to both indoor and outdoor living areas. Multiple renovated bathrooms, including a spacious primary suite featuring a double vanity, bidet, and expansive double shower with a bench, provide modern comfort while preserving the home's character. Beyond the main house, the estate truly distinguishes itself. A detached studio-style guest cottage with a full kitchen and bath is perfect for use as a pool house, an Airbnb, au pair housing, or more! What's more, a substantial 3-car detached garage offers owners and guests plenty of undercover parking along with an 8-vehicle parking lot, as well as room for storage, and the large second floor above is ready to be finished. The expansive grounds open the door to a wide range of possibilities, whether for extended family, guest accommodations, a home business, or future customization. The outdoor environment is designed for both relaxation and elite entertaining, featuring a fully upgraded saltwater pool with tanning ledge, waterfall, and slide, along with a brand-new hot tub and gazebo, outdoor kitchen,built-in fire pit, and recreation areas including bocce and horseshoe courts. The setting offers a private, resort-like experience rarely found in this location. Extensive recent improvements provide peace of mind and long-term efficiency (and massive utility savings), including a new 50-year roof, 54 brand-new windows, air conditioning, updated electrical with complete removal of knob-and-tube wiring and a whole-home surge protector, new cedar impression siding and gutters, and a whole-home water filtration system. A 72-panel solar array was installed in 2022 and delivers a peak output of 25.92 kWp (significantly lowering your electric bill), complemented by underground electrical service for enhanced reliability in our changing times. In 2025, the home was further upgraded with a new high-capacity natural gas heating system, replacing the original oil furnace system. Other updates and repairs, including chimney restoration and interior refinishing, reflect the consistent care and investment the owners have lovingly put into their home. With its combination of historic charm, modern infrastructure, expansive grounds, and multiple auxiliary structures, 917 DeKalb Pike offers a unique opportunity to enjoy a turnkey estate immediately while still providing the flexibility to tailor the property to your vision over time.