Island Pools & Spas, Inc. - Martha's Vineyard Pools Design, Construction, Service. Island Pools & Spas, Inc is an elite pool and spa builder in Marthas Vineyard and the surrounding areas. Island Pools & Spas, Inc. is part of The Association of Pool and Spa Professionals. With over 25 years in the business we at Island Pools and Spas can transform your yard into an oasis of relaxation, beauty and charm. Our team will work with you from concept to design to make sure that your new pool or spa is a welcoming addition to your landscape.