7891 4TH Avenue S LARGE CORNER-LOT HOME in a desirable WATERFRONT NEIGHBORHOOD with over 2, 300 square feet, four bedrooms and a wonderfully flexible floor plan! The open living and dining room combination provides plenty of space for entertaining, while an ADDITIONAL GREAT ROOM with its own exterior entrance offers even more room for family gatherings, a game room with a pool table, media room or second living area. The beautifully updated kitchen combines style and function with GRAY CUSTOM CABINETRY, soft-close drawers, quartz countertops, new stainless-steel appliances, a vented hood over the range, sleek gray tile backsplash and a large peninsula with seating. A standout is the stainless-steel French-door refrigerator with an illuminated glass display panel, adding both style and convenience. The open design keeps the kitchen connected to the main living spaces and makes entertaining easy. Three bedrooms are located on one side of the home, while the fourth bedroom is just off the main living area. With TWO CLOSETS, this versatile room can serve as a true fourth bedroom, home office, den or guest room. The spacious PRIMARY SUITE offers a large WALK-IN CLOSET and a thoughtfully designed en-suite bath with a modern coastal feel. Black iron hardware and fixtures provide a striking contrast against the light finishes, while the oversized DOORLESS WALK-IN SHOWER features designer tile and DUAL SHOWER HEADS. A freestanding soaking tub completes this relaxing, spa-inspired retreat. Throughout the home, luxury vinyl plank flooring, fresh finishes and thoughtful updates create a light, comfortable coastal feel. A BLUE SHIPLAP ACCENT WALL ties the coastal charm together, while the FIREPLACE WITH MARBLE SURROUND adds warmth and another distinctive focal point to the living space. Recent updates include a 2025 5-TON HVAC SYSTEM, an updated LG French-door refrigerator, LG laundry center, Samsung range and over-the-range microwave, plus a solar attic fan. There is just as much to discover outside. A spiral staircase leads to the home's charming WIDOW'S WALK, offering 360-DEGREE VIEWS, WATER VIEWS and a west-facing vantage point for SPECTACULAR FLORIDA SUNSETS. The large corner lot offers plenty of room to enjoy the outdoors, with fruit trees, palms, colorful Birds of Paradise and exotic tropical plants already creating the beginnings of your own Florida garden oasis. A PAVERED CIRCULAR DRIVEWAY provides plenty of parking along with a covered 2-CAR CARPORT. A separate detached bonus structure, previously used as a WORKOUT ROOM, offers even more possibilities for a fitness space, hobby room or workshop. TWO ADDITIONAL STORAGE SHEDS provide convenient space for bikes, beach gear, gardening equipment and more. Located in South Causeway Isle with NO HOA, this home puts you in the heart of a WATERFRONT NEIGHBORHOOD while keeping you close to everything that makes this area special. Hop on your bike for a 10-MINUTE RIDE TO THE WHITE SANDY BEACHES OF TREASURE ISLAND, or enjoy nearby marinas, restaurants, shopping and entertainment. St. Pete Beach is just minutes away, while vibrant Downtown St. Petersburg is an easy drive.