Discover the quintessential charm of coastal New England living at 2 Ashby Street, just moments from downtown Mystic's boutique shops, acclaimed dining, and scenic waterfront. Set on a beautifully landscaped 0.29-acre lot with sweeping Mystic River views, this exceptional property blends historic character and modern comfort in a classic main residence plus a fully renovated, licensed Accessory Dwelling Unit -ideal for guests, multigenerational living, or rental income. The main home offers four bedrooms and a bright, open floor plan marrying timeless elegance with thoughtful updates including a new roof, rebuilt chimney w/ liner, new gutters, refinished hardwood floors, and fresh interior and exterior paint. The walkout lower level adds 350+ sq ft of finished space with laundry and flexible office or guest suite. Additional upgrades include enhanced 200-amp electrical service, new basement stairs, and custom storm and screen doors for year-round comfort. The transformed carriage house features 1000+ sq ft with a recreation room, custom bar, office, half bath downstairs, plus a sunlit studio upstairs w/full kitchen, bath, and open living/sleeping area. Updates include new siding, Andersen windows, plumbing, electrical, stairs, and leaf-guarded gutters.Professionally landscaped w/granite steps, retaining walls with drainage, mature plantings, and a private stairway to downtown Mystic, this move-in-ready home offers refined, flexible living in Mystic's coastal community.