Welcome to 78 Seal Lane, a captivating waterfront retreat completely renovated and exquisitely expanded with dramatic westerly views of Casco Bay from almost every room. Set on an extremely private 1.4-acre lot with 200 feet of pristine shoreline, mature gardens, and a private sandy beach. Enjoy glorious sunsets over the water from your backyard, watch seals basking on nearby Sandy Point Ledge, and experience the joys of boating, paddleboarding, and swimming steps from your sprawling oceanfront lawn. The open-concept floor plan is ideal for everyday living and entertaining, with multiple indoor and outdoor spaces for a cozy night by the two-sided fireplace or an outdoor white tent celebration. Beautiful moldings and architectural details throughout add a touch of coastal elegance and sophistication to every room. A light-filled, flexible floor plan offers multiple family rooms, a library, and four ensuite bedrooms, including a primary suite that opens onto an expansive waterfront deck. A daylight lower level with stunning views is ideal for a home gym with multiple French doors to a stone patio, an outdoor shower to rinse off after a day on the beach, and a hot tub to unwind while watching the moon shimmer over the Bay. The charming community of Cousins Island offers rare serenity and convenience, being causeway-connected to the mainland, less than 10 minutes to Yarmouth Village and acclaimed schools, and walking distance to the renowned trails of the 23-acre Little John Preserve. It's just 25 minutes to the Jetport, downtown Portland, and award-winning restaurants and cultural opportunities.