Timeless Elegance Meets Modern Luxury in the Heart of St. Augustine. Welcome to 31 Cincinnati Avenue, a rare opportunity to own an exceptional piece of St. Augustine's architectural heritage. Originally built in 1910 and thoughtfully expanded in 2015, this distinguished residence offers nearly 2,700 square feet of refined living space, gracefully positioned on a .30-acre double lot in the coveted Uptown district, just a short stroll from historic downtown. With short-term rental eligibility, the property presents an equally compelling opportunity as a private estate or a luxury investment. Inside, soaring ceilings, original yellow heart pine floors, and artisan-crafted millwork honor the home's historic character, while carefully curated modern enhancements provide contemporary comfort and functionality. The welcoming foyer showcases an elegant bay window and period woodwork, leading to a sweeping staircase and light-filled interiors that unfold with timeless charm. The gourmet kitchen is a chef's masterpiece, featuring custom cabinetry, a generous center island, a professional-grade Italian six-burner gas range with griddle and double ovens, a wine refrigerator, and a spacious walk-in pantry. A charming Dutch door opens from the kitchen to the expansive wraparound porch, creating seamless indoor-outdoor living ideal for both entertaining and everyday enjoyment. The adjoining family room impresses with a dramatic cathedral ceiling, floor-to-ceiling built-ins, and French doors with transom windows, bathing the space in natural light. The first-floor primary suite offers a tranquil private retreat, highlighted by 13-foot-plus ceilings, a spa-inspired bath with soaking tub and oversized walk-in shower, a dual-basin vanity, and three generous closet spaces. Upstairs, two spacious bedrooms share a beautifully remodeled bath appointed with a jetted tub/shower combination and a custom vanity, providing comfort and elegance for family or guests. Outdoors, the fully fenced and gated grounds offer exceptional privacy and charm, anchored by a magnificent magnolia tree dating back to the 1800s. The property is further enhanced by an oversized two-car concrete block garage with abundant storage and convenient rear alley access. Additional highlights include a newer architectural shingle roof, updated electrical and plumbing, and a transferable termite bond, ensuring peace of mind. Blending historic craftsmanship with modern sophistication, this remarkable residence is a true gem in one of Florida's most storied and desirable cities.