Areas We Serve
Landscaping Services Available Throughout Long Island
Family-built. Purpose-driven. Designed to Last.
For almost 50 years, Gary Duff Designs has defined Long Island outdoor living through thoughtful design and construction. Known for artistry, reliability, and complete project management, our family-led design-build firm creates outdoor spaces that reflect the beauty and individuality of every community we serve.
Elevating the Long Island Outdoors Since 1976
Our work can be found in some of Long Island’s most distinctive towns and neighborhoods, each one with its own architectural style, landscape, and personality.
Primary Service Areas:
What Sets Gary Duff Designs Apart
Each project reflects the Duff family’s legacy of design excellence, craftsmanship, and integrity, values that have defined our work across Long Island since 1976.
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![Outdoor living landscape design with layered plantings and custom pool surroundings in Huntington, NY]()
Landscape Design & Build
Complete property transformations, planned and built with care
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![Outdoor living patio design featuring masonry pavers and integrated seating areas in Dix Hills, NY]()
Patios & Masonry
Driveways, walkways, and stone features that define each outdoor space
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![Outdoor living water feature with custom pool, stone waterfall, and surrounding landscape design in Stony Brook, NY]()
Pools & Water Features
Designed for relaxation, beauty, and long-term enjoyment
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![Outdoor living shade structure featuring pergola design and masonry bar in Old Westbury, NY]()
Pergolas & Shade Structures
Comfort, architecture, and style combined
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![Outdoor living planting design with layered shrubs, perennials, and stone walkways in Manhasset, NY]()
Plantings & Green Spaces
Living design that complements every home and setting
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![Outdoor living outdoor lighting design highlighting architectural features and landscape pathways in Lloyd Harbor, NY]()
Lighting & Fire Features
Evening ambiance for year-round outdoor living
Since 1976
Designed for the Way Long Island Lives
Wherever you are on Long Island, north shore or south, estate property or family home, our team is here to design and build outdoor spaces that feel personal, purposeful, and built to last.
Where Our Craft Becomes Your Story
“Wow!!!! Cannot say enough about Gary and his team. The beautiful transformation of my company back yard project. The expertise advice that was given was so helpful. They will definitely be doing my personal home backyard. Wish I could give 50 stars or 100 stars.”
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— Mr. & Mrs. O., via Google
Guidance from Gary Duff Designs
Decades of experience have taught us a few things, here’s what most clients want to know before we start.
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Yes, it’s where our story began and where we continue to build. Every project we design and construct is rooted in Long Island’s landscapes, architecture, and communities. From Sag Harbor to Smithtown, we understand the nuances of the region better than anyone else.
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We design for all kinds of homes, from classic estates to modern family properties. Whether it’s a full landscape transformation or a focused outdoor living project, every design is tailored to the site, the architecture, and how you want to live outdoors.
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Our team works throughout Nassau and Suffolk Counties, including both North Shore and South Shore communities. If you’re unsure whether your property is within our service area, reach out, if it’s on Long Island, chances are we’re already working nearby.
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Absolutely. After fifty years of building across Long Island, we’re familiar with the zoning laws, building codes, and coastal regulations that vary from town to town. Our team handles all the details so your project moves smoothly from design to construction.
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We take on select projects starting at $10K, and we bring the same care and precision to smaller patios or plantings as we do to large-scale outdoor living environments. The fit matters more than the footprint.
Enhancing The Quality Of Life Through Landscape Design
For five decades, the Duff family has been redefining outdoor living across Long Island, one purposeful, beautifully built space at a time.