Discover a rare chance to own a versatile coastal property on the quiet side of Mount Desert Island-just minutes from Acadia National Park, world-class dining, and charming village life. Whether you're seeking a seasonal retreat, a proven income-producing vacation rental, or a future redevelopment site, 139 Harbor Drive offers endless potential in one of Maine's most coveted destinations. This updated 1945 coastal cottage features approximately 1140 sq. ft. of living space with sweeping views of Bass Harbor and a deeded walking right-of-way to the shore. Major system improvements include a new well, septic system and leach field installed in 2021, heat pumps, newer vinyl replacement windows-making it truly turnkey. Situated on a recently surveyed parcel with generous zoning flexibility, the property allows for expansion or relocation of the footprint and buildable heights up to 35 feet, opening the door to a reimagined luxury residence with panoramic harbor views. The location is unmatched-under 10 minutes to Southwest Harbor's boutique shops and restaurants, and a short drive to Acadia's iconic trails and shoreline. This is more than a home-it's a canvas for your coastal vision, offering peace, privacy, and exceptional investment potential in a market defined by limited inventory and strong appreciation.