your Dream outdoor living space

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Improve your lifestyle
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Host Great Parties
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Increase Your Home Value

Deck Builder in Hammondsport, NY

Make your dream outdoor living space a reality with a custom deck and additional features!

“Dream come true.

We are over the moon happy with our new deck.”

- Angela R.

Become a Master Host in Hammondsport with a New Backyard Deck

  • Group Of Happy Young Friends Having Dinner At Patio

    Host Great

    Make new and lasting memories with family and friends.

  • Home lifestyle woman relaxing enjoying luxury sofa patio furniture on outdoor patio

    Have a Place
    to Relax

    Let life’s worries behind as you enjoy the beauty of the outdoors.

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    Be Proud
    of Your Space

     Become the envy of the neighborhood with your beautiful outdoor space.

At Keystone Custom Decks, we believe having your dream outdoor living space designed and built should be an enjoyable and painless process.

  • Do you love hosting people, but you don’t love your available space?

  • Do you enjoy spending time outdoors, but your existing outdoor space is unattractive or unusable?

  • Do you have a vision for your dream outdoor living space, but you feel overwhelmed by the construction process?

We know what it feels like to not love your outdoor living space. That is why we have been building custom decks for over 30 years.

“We recently hired Mahlon and his crew at Keystone to re-do two decks.  All the pricing was laid out, our options were clear, and the terms were perfectly legible.  Mahlon was patient with us throughout the entire project and communicated thoroughly throughout the process.

Nate and his crew showed up when expected.  They were extremely professional.  They maintain a serious job site.  Every night all tools and equipment were packed up and put away.

If you're considering redoing your deck, call these guys up.  I am so excited to enjoy our new decks this spring and summer!"

-Brian Schneeman

We make a new deck in Hammondsport as easy as possible

  • 1

    Call Us

    We’ll learn more about your space and schedule an estimate.

  • 2

    Design Proposal

    Receive your quote and complimentary 3D rendering.

  • 3


    Sign your proposal and watch your dreams become reality.

  • 4


    Love your new deck and space you have to host parties and live!

3D Render Final Build
“Their 3D rendering really helped us envision what the final project would look like, and it helped guide us in making adjustments and changes to improve the functionality of the living space.”
- Lawrence Han

What you can expect with Keystone Custom Decks:

Turn-key Projects

We take care of every part of the construction process.

Lifetime Workmanship Warranty

We stand behind our work for life.


We deliver on our timeframe and proposal promises.

Financing Available

We offer financing options through our partners.

"Just finished a second floor 600ft deck with stamped concrete on the lower level. Love it. Very smooth tear down and construction. The crew was excellent - polite, very organized and did great work. Highly recommend."

- Rajiv Trivedi

"Our thanks to everyone at Keystone Custom Decks that made our dream deck come true. Thank you Mahlon for your design ideas at the start and continuing guidance throughout the project. The construction crew was always on time and ready to work. Always prepared at the beginning of the day and cleaned up at the end. They are all very experienced and like what they do. Thank you Anthony, Brandon Steve and Jason, you are true professionals. Completed ahead of schedule, the project was well planned and expertly constructed. We love our new space and highly recommend Keystone Custom Decks.

- Kris Armstrong

"I had the privilege of having Keystone install a deck/landing outside of my back door. The products they use are high end and the craftsmanship is bar none! Their employees are professional and work hard. Highly recommend!"

- Austin Lapp

Custom Decks in
Hammondsport, NY

If you own a house in Hammondsport or alongside Keuka Lake, you want a beautiful outdoor living space.  The problem is your current outdoor space might be unattractive or unused.  Keystone Custom Decks builds beautiful custom decks and outdoor living spaces so you can host great parties, make memories, and improve your lifestyle.

At Keystone Custom Decks, we know you want to create and live in your dream outdoor living space, and that is why we have been building custom decks for over 30 years.

We are a custom deck builder in Hammondsport, NY.  We also serve the surrounding areas.  It doesn't matter if you are in the Village of Hammondsport or along Keuka Lake, we will work on your deck project! 

If you live in the Hammondsport area, you know how much beauty, history, and activity there is to do in the area.  Whether you spend some time at the Glenn Curtiss Museum, enjoy some of the local wineries and vineyards, or spend an afternoon with the family on Keuka Lake; you can come home to your dream outdoor space to relax and unwind! 

Hammondsport, New York, is a charming village located at the southern tip of Keuka Lake in the Finger Lakes region. Known for its picturesque lakefront, historic character, and association with early aviation history, Hammondsport offers a tranquil and scenic destination for visitors. The village is celebrated for its wineries, outdoor recreational opportunities, and its title as the "Cradle of Aviation." The official government website of Hammondsport provides valuable information and resources for residents and visitors alike.

Keuka Lake is the centerpiece of Hammondsport's natural beauty and recreational offerings. The village's waterfront area includes a public beach, a park, and opportunities for swimming, boating, and fishing. The lake's clear waters and surrounding hills provide a serene backdrop for relaxation and outdoor activities.

Hammondsport is often regarded as the "Cradle of Aviation" due to its historical significance in early aviation development. Visitors can explore the Glenn H. Curtiss Museum, which honors the life and achievements of aviation pioneer Glenn Curtiss. The museum features a diverse collection of aircraft, engines, and memorabilia, providing insights into the evolution of aviation.

In addition to Hammondsport's local attractions, the Finger Lakes region offers numerous points of interest. Here are some top-rated attractions and landmarks in the area according to TripAdvisor:

  1. Keuka Lake Wine Trail - A wine trail known for its wineries and stunning lake views. Website:

  2. Watkins Glen State Park - A scenic state park with gorge trails, waterfalls, and lush vegetation. Website:

  3. Corning Museum of Glass - A museum in Corning, NY, showcasing glass art and glassblowing demonstrations. Website:

  4. Seneca Lake Wine Trail - Another wine trail with wineries and vineyards along Seneca Lake. Website:

  5. Finger Lakes Wine Country - A renowned wine region with numerous wineries and vineyards. Website:

  6. Watkins Glen International - A racetrack in Watkins Glen, NY, known for NASCAR and other motorsports events. Website:

  7. Sonnenberg Gardens & Mansion State Historic Park - A historic estate with beautiful gardens and a Victorian mansion in Canandaigua. Website:

  8. Montezuma National Wildlife Refuge - A wildlife refuge with walking trails and birdwatching opportunities. Website:

  9. Women's Rights National Historical Park - A historic park in Seneca Falls dedicated to the women's suffrage movement. Website:

  10. Grimes Glen - A scenic hiking trail leading to waterfalls and natural pools for swimming in Naples, NY.

For more information about Hammondsport, its attractions, and community resources, please visit the official government website of Hammondsport:

The zip code for Hammondsport, NY, is typically 14840.

Hammondsport Deck Builder

To make your dream backyard a reality, we also know that you may want more than just a deck.  That is why we offer more than just custom decks in Hammondsport.

We also offer the following:

All these features will make your backyard dreams come true and make you a master host!