Five Decades of Craftsmanship

Long Island Landscape Design, Planned and Built by One Family

Your outdoor space should feel as considered as the inside of your home. We design the whole property first, then manage every trade that builds it, so the patio, plantings, pool and kitchen come together as one finished space.

✓ One design, built all at once or in phases
✓ Techo-Bloc Pro Contractor
✓ Based in Holbrook, serving the Hamptons to Great Neck

Prefer to talk? Call 631-910-7587.

Start Your Design Conversation

Tell us a little about your property, and a member of our team will call to set up a time to walk it with you.

A backyard swimming pool surrounded by green grass, flower beds, and a black metal fence. There are red umbrellas and lounge chairs around the pool, with a house in the background and trees surrounding the area.

Where Our Craft Becomes Your Story

We had an unbelievable experience with Gary Duff Designs!!! They transformed our backyard into an ultimate outdoor living place. Designs ideas and layout were great and the overall outcome was impeccable. All the employees were well mannered and respectful. The project was carried out on schedule and in an orderly fashion. I would definitely recommend them to friends or family and I look forward to using them on future projects. Thanks again to Gary Duff designs and his crew for giving me my dream backyard oasis!!!

“

— Anthony G. (via Google review)

Before and after

Same yard. A whole new way to use it.

What was once an open stretch of backyard is now the family’s favorite place to spend a summer afternoon. A sparkling pool sits on a wide stone patio with room for lounging and dining, framed by a garden fence, blooming hydrangeas and fresh plantings that tie it back to the house. See the difference.

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Before and after of a Long Island backyard transformed by Gary Duff Designs, from bare dirt and lawn to an inground pool with stone patio, black fence and hydrangeas

Design first

A plan for the whole property comes first.

Building one piece at a time is how yards end up disconnected. We design everything up front so every part fits, whether you build it all at once or over time.

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The usual approach

✕  Several contractors, each working from their own plan

✕  You coordinate the schedule and the trades

✕  Pieces added over time that never quite match

✕  A different contact for every question

With Gary Duff Designs

✓  One design for the whole property, drawn before anything is built

✓  Every trade scheduled and managed for you

✓  Build all at once or in phases, on the same design

✓  One point of contact, start to finish

Pool house with white columns, stone outdoor kitchen and flowering plantings designed by Gary Duff Designs in Sands Point, NY

What we design and build

Every part of your outdoor space, planned as one design.

Each element is designed with the others in mind, so everything works together.

  • Full-property transformations:Terraces, plantings and structures, designed together.

  • Patios and hardscape: Patios, pool decks, walls, steps and stonework.

  • Outdoor kitchens: Designed around the way you host.

  • Pergolas and covered living: Shade and shelter that belong to the yard.

  • Fire and lighting: Fire pits, fireplaces and landscape lighting.

  • Pool environments: Pool decks, spas and water features as part of the yard.

Curved stone outdoor kitchen with built-in grill and granite countertop by Gary Duff Designs on Long Island

How it works

Four steps, one family.

Consult and discover

We walk your property and learn how you want to live outside.

01.

Design with purpose

We plan the full property and refine it with you until it feels right.

02.

Build and manage everything

03.

We handle the materials, the trades and the construction.

Enjoy for decades

Step outside into a space built to last.

04.

White pergola over a stone patio with outdoor fireplace and seating built by Gary Duff Designs on Long Island

Built on family, refined by design.

Celebrating 10,000+ Projects

& 50 Years of Gary Duff Designs.

Our Landscape Design Capabilities

Our craft is in bringing various capabilities into one, holistic landscape design and build project. Whether or not we're responsible for all of them, we always consider the impact of one to another. 

And because we do what we love, we take pride in giving back with organizations such as the Make-A-Wish Foundation.

A garden pathway made of stepping stones lined with colorful flowers and green plants, leading past a house with a stone exterior and an outdoor patio with black wicker furniture, during daytime.

Landscape Design That Defines the Outdoors

Outdoor patio area with wicker furniture, stone fireplace with a mounted TV, lanterns, and decorative bird figurines, with a white house and a shed in the background.
Outdoor kitchen with a stone island and bar, built-in grill, fridge, and seating area in a garden with flowering plants and trees.
A backyard with a rectangular swimming pool, white lounge chairs on a grassy area, and outdoor seating with sofas and chairs near a hedge. A modern pool chair float is in the pool, and a wooden deck is adjacent.
Backyard patio with a white pergola, stone wall, potted plants, outdoor furniture, and lush greenery.
Architectural landscaping integrating hardscape elements and plantings in Sands Point, NY
Gary Duff letters graphics

Where Our Craft Becomes Your Story

“We chose this company to design our entire backyard. Pool, patio, kitchen and other things. They far surpassed our expectations. They have a great work crew with wonderful attention to every last detail. We couldn’t have been happier throughout the entire process.”

“

- Patti W. Via Facebook

Before You Book

  • A design shows how every part of your property works together before anything is built. You see the whole plan up front, avoid costly changes once construction starts, and can build it all at once or over time.

  • We design the pool area as part of the whole yard and coordinate the installation with trusted pool specialists. You keep one point of contact throughout.

  • We regularly collaborate with architects and interior designers, so the outdoor spaces carry the same level of detail as the rest of your home.

  • A member of our team will call to learn about your project and set up a time to walk your property with you.

Reserve Your Design Consultation
Covered patio with stone fireplace, mounted TV and wicker seating designed by Gary Duff Designs on Long Island

Fifty years of Long Island backyards. Yours is next.

A full design takes time to do well. Start your consultation this fall, and your plan is ready when building season opens.

Prefer to talk? Call 631-910-7587.

Reserve Your Design Consultation
Rectangular inground pool with stone coping, lounge chairs and a fire pit seating area by Gary Duff Designs on Long Island