Lagoon House Reservations are handled by Hawaii Holiday, A Piece of Paradise. Once on the site, click on the Availability link to check availability, get a rate quote, and make a reservation right online!
There is a real time Availability Calendar on that page for you to use when planning your Lagoon House vacation.
Feel free to call Hawaii Holiday, A Piece of Paradise at 808-965-0400. When calling, please keep our time zone in mind. Hawaii is GMT -10:00; 3 hours earlier than Pacific Daylight Time (summer), 2 hours earlier than Pacific Standard Time (winter).