520 Mt Holly Road perfectly blends antique charm w/ modern updates, embodying iconic Hudson Valley living. Nestled in Katonah's most coveted neighborhoods, this 1810 Colonial, elegant 1st floor addition including primary bedroom2003, rich in history & distinguished charm. Renovated kitchen, great room, dining area, French doors leading to patio and screened-in porch.generous 1st-floor primary suite includes a luxurious bath. Laundry on the 1st floor. Living room boasts a stone fireplace, wood beams, built-in bookshelves. Delightful library or dining room features charming built-ins, wide hardwood plank floors. Upstairs is the 2nd floor primary suite w/ luxe bath,2 addt'l bedrooms, office/den/storage room, stylish hall bath. This 4-bedroom home lives like a 5 bedroom. On 1.77 glorious acres property includes a Hamptons-style pool w/new gunite interior, a cabana, idyllic gardens, raised bed gardens, gloriousvscreened-in porch, perfect for lovely evenings. Come fall in love!