Masonry Contractor, Concrete Contractor and Paving Contractor. For the last 35 years, Mario and Frank DAlessandro have become Long Island's premier masonry company, serving all Nassau and Suffolk County areas, offering quality craftsmanship at the most competitive prices and servicing residential, commercial and industrial customers. We offer complete masonry services - initial concepts, demolition, installation and finishing from simple to elaborate patio & stoops, paver and concrete walkways, blacktop, concrete and asphalt driveways, cultured stone and veneers and custom paver designs incorporating firepits, bbqs, pier lighting, flower beds and retaining walls as well as pool pavers!