54 Sand Castle Lane This rare Amagansett Dunes parcel presents a compelling opportunity to create a custom ocean-oriented retreat in an established beach community. Approved for a newly constructed 3, 400 square foot, 5-bedroom residence with a rooftop deck showcasing ocean views, the property also includes plans for a full-size pool and pool house. Set on a secluded lane south of the highway with deeded ocean access and bordered by over 28 acres of preserved land, the setting offers a unique combination of privacy, proximity to the beach, and long-term value in one of the East End's most desirable coastal locations. All necessary permits and approvals are in place, allowing construction to begin immediately.