A Rare Waterfront Offering: DEC-Designated Upland Boundary Waterfront - Build Right to the Bulkhead (DEC Documentation on File) Tucked away on 1.39 private acres along Senix Creek with direct access to Moriches Bay, this exceptional Center Moriches waterfront estate offers the ultimate blend of luxury, privacy, and coastal living. Boasting over 100 feet of bulkhead with deep-water access and room for larger vessels, this rare property is a dream for boating and waterfront enthusiasts alike. The beautifully updated main residence offers approximately 3,400 sq ft of sun-drenched living space featuring 4 bedrooms and 3 baths with an open, airy layout designed for effortless entertaining. The renovated eat-in kitchen showcases quartz countertops, stainless steel appliances, and seamless flow into the spacious living areas. A large wood-burning stove with immediate waterfront view, adds warmth and charm, while the first-floor ensuite provides ideal accommodations for guests or extended family. Upstairs, the luxurious primary suite features an updated bath, walk-in closet, and private terrace overlooking the serene waterfront setting. Fresh paint, modern finishes, and new walkways complete this move-in-ready retreat. Adding to the property's incredible versatility is a charming detached 1-bedroom guest cottage with vaulted ceilings, updated kitchen, and gas fireplace, perfect for visitors, extended stays, or private workspace. A separate approximately 1,000 sq ft workshop offers 200-amp electric, gas heat, and brand-new cesspool, ideal for hobbyists, contractors, or additional storage. A detached garage with dedicated tackle room further enhances this one-of-a-kind waterfront compound. The property includes a bulkhead with full utility service (electric and water), and with a documented jurisdictional boundary designation on file with the New York State Department of Environmental Conservation. The bulkhead establishes the line where tidal wetlands regulations apply, so the land immediately adjacent to it, is treated as usable/buildable upland and outside of DEC jurisdiction and permit requirements. Privately set at the end of a long drive, yet just minutes to Main Street, local shops, dining, beaches, and Moriches Bay Yacht Club, this extraordinary property offers a rare opportunity to own a true waterfront retreat with unmatched flexibility, beauty, and lifestyle.