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!

“We are incredibly pleased

with the outcome and excited to have this new outdoor living space to relax and spend time with the family.”

- Garret Pachtinger

 “The most professional

and understanding crew I've ever had the pleasure to be able to have work done for my family.”

- Guiseppe Troisi

“We LOVE our new deck

with an outdoor kitchen and fireplace!”

- Megan & Dave Johnson

“Dream come true.

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

- Angela R.

Become a Master Host in Hammondsport with a custom outdoor deck and living space.

  • 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.

  • 660460

    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 the process 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.

"We could not be happier with Keystone.  They were professional, punctual, and courteous.  The deck is amazing.  We had several estimates, and the one from Keystone was the best one.  I would definitely use them again in the future."

- Chet Reber

"Excellent craftsmanship and a great work ethic.  We are thrilled with our deck and would highly recommend Keystone Custom Decks."

- Kate Domenick

"Working with Keystone was a wonderful experience from start to finish.  Very professional organization.  The crew was a pleasure to work with and their craftsmanship is top-notch.  Great experience working with them!"

- Bill Elliott

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! 

Hammondport is a delightful little village with numerous attractions. These include: 

  • Keuka Lake
  • Glenn Curtiss Museum
  • Dr. Konstantin Frank Winery
  • Heron Hill Winery
  • Bully Hill Vineyards Winery
  • Pleasant Valley Wine Company
  • Weis Vineyards
  • Ravines Wine Cellars
  • Finger Lakes Boating Museum
  • and so much more!

From the world-class wineries to the stunning landscape, Geneva is sure to delight you. The village was founded in 1827 and incorporated 29 years later in 1856. Numerous engineering advancements took place in Hammondsport including the development of early airplanes and seaplanes. Glenn Hammondsport Curtiss, a motorcycle designer and manufacturer, was born and lived in the area.  As of 2020, there are 583 people who call Hammondsport home. The village slogan is Home of the Wine. 

The Hammondsport Chamber of Commerce states the following "There's much to see here. So, take your time, look around, and learn all there is to know about us. We hope you enjoy our Cool Small Town!"

We are happy to serve Hammondsport, zip code 14840, and the surrounding areas!

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!