Welcome to Double O Landscaping & Tree Service with over 28 years experience. We have an extensive yard design including, Plantings, Sod, Railroad Ties, Sprinklers, Custom Stone Walls, Ponds, Water Falls, Patios & Stoops, Brickwork, Driveways, Walkways, Cobblestone, Rock, Pavers, Stone & much more. Inquire about our Lawn Programs, Spring Cleanup & Fertilizer Application Programs Free Estimates • Serving all of Long Island for 28 Years!