Complete Outdoor Living
Outdoor Living Contractor for Custom Spaces on Long Island
Elevating Long Island’s Outdoor Living Experience
Each backyard design tells a story of craftsmanship, creativity, and care. Our work blends design intelligence with hands-on expertise, delivering luxury landscapes that inspire daily connection, celebration, and calm.
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![Outdoor living landscape design with layered plantings and custom pool surroundings in Huntington, NY]()
Landscape Design
Thoughtful plans that define space, flow, and purpose.
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![Outdoor living patio design featuring masonry pavers and integrated seating areas in Dix Hills, NY]()
Patios & Masonry
Built with artistry and precision to anchor every gathering.
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![Outdoor living space with custom outdoor kitchen and built-in dining area in Smithtown, NY]()
Outdoor Kitchens
Culinary spaces designed for everyday use and entertainment.
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![Outdoor living design centered around a modern fire pit and stone patio in Cold Spring Harbor, NY]()
Fire Features
The warmth and ambiance that draw people together.
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![Outdoor living water feature with custom pool, stone waterfall, and surrounding landscape design in Stony Brook, NY]()
Water Features
Serenity in motion through cascades, pools, and ponds.
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![Outdoor living shade structure featuring pergola design and masonry bar in Old Westbury, NY]()
Shade Structures
Pergolas, pavilions, and cabanas that create comfort and character.
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![Outdoor living entertainment space with custom putting green and recreational landscaping in Syosset, NY]()
Gaming & Entertainment
From basketball courts to putting greens, built for lifestyle.
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![Outdoor living outdoor lighting design highlighting architectural features and landscape pathways in Lloyd Harbor, NY]()
Outdoor Lighting
Strategic illumination for atmosphere, safety, and style.
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![Outdoor living planting design with layered shrubs, perennials, and stone walkways in Manhasset, NY]()
Plantings
Living architecture that shapes privacy, texture, and seasonal interest.
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![Outdoor living pool and poolscape design with custom swimming pool and patio layout in Northport, NY]()
Pools & Poolscapes
Custom aquatic designs that complete the backyard experience.
Build the Outdoor Life You’ve Earned
Every home deserves an outdoor space that feels intentional, an environment planned as carefully as its interiors. At Gary Duff Designs, we create custom outdoor environments that elevate how Long Island lives outside. From refined backyard design to complete outdoor remodeling, our family-led team brings five decades of landscape architecture and construction expertise to every project.
Invest in a Space That Works as Hard as You Do
Transforming your property isn’t about excess, it’s about creating custom outdoor environments that work effortlessly for your lifestyle and reflect your standards. Here’s what an integrated outdoor living design makes possible:
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Every element, hardscape, planting, and structure, works together with purpose.
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A space designed for gathering, relaxing, and living outdoors year-round.
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One team coordinating every trade, detail, and schedule.
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Materials and methods chosen for lasting performance and appeal.
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Elevated curb appeal and livable luxury that enhances resale.
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Five decades of excellence serving Long Island, NY homeowners.
OUR PROCESS
A Proven Approach to Outdoor Living Design & Build
We make outdoor transformation effortless through a guided, transparent process.
Consult & Discover
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We learn how you live, your goals, and your home’s unique character.
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Design With Purpose
Our design team crafts a detailed plan for beauty, balance, and use.
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Build & Manage
We oversee every phase of landscape construction to deliver an exceptional result.
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Enjoy for Decades
Step into a fully realized outdoor environment designed to mature beautifully over time.
See the Transformation
Where Our Craft Becomes Your Story
“Gary & Eric completely transformed my property in a way that I couldn't have imagined. Their vision, attention to every detail, and high end craftsmanship was exactly what I was looking for. I was very impressed and have already hired them for another project.”
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— Tim R., 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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It can mean everything from a new patio and outdoor kitchen to a fully integrated landscape design with lighting, plantings, and pools. We handle every element—from concept through construction, to ensure a cohesive, purposeful outdoor environment.
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Yes. As a family-led design-build firm, we manage every phase of the project. That means your designer, builder, and project manager are all part of one team, ours, ensuring consistency, communication, and craftsmanship from start to finish.
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After decades designing across Long Island’s coastal and wooded landscapes, we understand the land, its light, its weather, its challenges. Our designs respond to the local climate, architecture, and lifestyle, creating spaces that feel naturally at home here.
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We approach projects of all sizes with the same care, but most outdoor living environments begin at $10K and above, depending on scope, materials, and complexity. Every plan is tailored to your home, goals, and vision.
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Timelines vary based on design complexity and season, but most full-property outdoor projects take several weeks to design and a few months to build. We’ll guide you through every step with clear communication and realistic expectations.
Celebrating 50 Years of design excellence
50 Years of Designing Outdoor Spaces
10,000+ Projects That Transform How People Live.
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.