A rare castle conversion offering nearly 1,850 sq. ft. of living space, private grounds, central air, brand new furnace just installed July 2026, and a detached garage. Condo fee includes heat and hot water, helping reduce monthly utility expenses. This oppotunity to own a residence within one of New Hampshire's most architecturally significant estates does not come along often. Built in 1905 by Edward Francis Searles, Stillwater Manor has been thoughtfully converted into just six exclusive residences, offering exceptional privacy, timeless character, and a truly distinctive living experience. Set back from the road and surrounded by mature landscaping and historic stonework, the property provides a peaceful estate setting unlike traditional condominium living. Inside, historic craftsmanship blends seamlessly with modern updates. The spacious living area showcases rich tigerwood flooring and a remarkable artisan brick oven fireplace, creating a warm and inviting focal point. The kitchen features granite countertops, stainless steel appliances, and elegant arched openings that enhance both style and functionality. The primary suite offers a private retreat with a walk-in closet, in-unit laundry, and a beautifully renovated en-suite bath. A second bedroom also includes a walk-in closet and its own attached full bath, making it ideal for guests, family, or a home office. Additional features include central air conditioning, a newly installed furnace, abundant storage, a detached garage, and a fully integrated home theater system. The association provides heat, hot water, and exterior maintenance for easy, low-maintenance living. Conveniently located near the Massachusetts border, The Loop in Methuen, and major commuter routes with easy access to Boston and the Seacoast. With only six residences in this historic estate, opportunities to own at Stillwater Manor are exceptionally rare.