Completely Renovated Modern Escape for the Design-Savvy Buyer. Every inch of this stunning retreat has been thoughtfully transformed by its interior designer owner--from the fully renovated interiors and spa-like bathrooms to the newly built 2-car garage - a sleek extension of the home's design, and a showstopping new 20x40 gunite pool. The lower level has been converted to additional space with poured concrete floors with radiant heat, a full bathroom, gym with sauna and a mudroom area. Set on 5+ private acres in an unbeatable location--just 5 minutes to Bedford, Katonah, Pound Ridge, and Cross River-- 21 Black Spring offers the seclusion you crave while keeping you close to everything that matters. Inside, thoughtful details abound--an open-concept Bilotta kitchen, a dramatic Moroccan-tiled gas fireplace, and a light-filled office with deck access. Floor-to-ceiling windows and mahogany sliding doors seamlessly connect the indoors to the outdoors, leading to a 2022 Ipe wood deck overlooking the serene landscape. The flexible layout offers two primary suite options, including a second-floor retreat with a custom California Closets walk-in and spa-like ensuite bath. Outside, the 20x40 gunite pool with a PebbleTec finish and Ipe wood pool deck create a private oasis that feels like a boutique getaway. Additional improvements include curated landscaping, all new mechanicals, a whole-home generator, complete propane conversion, Sonos speakers throughout, solid-core doors with Baldwin hardware, and more. For nature lovers, there is a pond on the property that leads into a babbling brook & it's walking distance to Ward Pound Ridge Reservation, offering miles of scenic trails right at your doorstep. Culture and fine dining are also within easy reach, with Caramoor Center for the Music & Arts just minutes away and renowned restaurants like The Bedford Post and The Inn at Pound Ridge by Jean-Georges nearby. Located in the highly sought-after Katonah-Lewisboro School District and zoned for Katonah Elementary School. This is a rare offering for those who appreciate quality over quantity, timeless design, and total privacy--without sacrificing proximity to the city.