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 Watkins Glen, 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 Watkins Glen 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 living room. Happy lady lying down on comfortable pillows daydreaming thinking. Beautiful young Asian chinese girl.

    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.

“Mahlon and his crew did a great job with our deck and screened-in patio.  They were incredibly professional and hard working.
We will definitely enjoy it for many, many years to come and are so thankful we hired them to do our project.  We could be happier with the results!"
-Ashley Cheek

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 Green Sky Credit.

"Keystone Decks and their crew are awesome.  First-rate craftsmanship.  I would recommend them to everyone I know."

- Vince Perillo

"Our deck and covered porch dream was finally realized after ten years, with the help of the Keystone team!  The whole crew, office staff included, surpassed our expectations on the creation of our dream deck, while also being absolute gentlemen and just awesome, kind people."

- Anne Simone

"I interviewed many perspective contractors for the deck on my new home.  When I contacted Keystone, from the very first visit I realized I had made the right call.  They were prompt, courteous, and professional at all times.  Our family could not be happier that we chose to call Keystone."

- Jack Kelly

Custom Decks in Watkins Glen

If you own a home in Watkins Glen or the surrounding area, 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 Watkins Glen, NY.  We also serve the surrounding areas along Seneca Lake.  It doesn't matter if you live in the Village of Watkins Glen, along Seneca Lake, or nearby, our mission is to make your dream outdoor space a reality! 


If you live in Watkins Glen, you know how much beauty there is in the area, and how many activities there are to enjoy the surrounding nature.  After spending a day on Seneca Lake, taking some time to do wine tasting, or spending the day with the family at Watkins Glen State Park; you can come home to your dream outdoor space to relax and unwind! 

Watkins Glen 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 Watkins Glen.

We also offer the following:

All these features will make your backyard dreams come true and make you a master host!
At Keystone Custom Decks, our team's vision is to serve each of our customers during every step of the project.  From the initial estimate to the finished deck, our team of deck builders and deck contractors is available to answer questions and make your dream a reality.


As part of the process, we give you a complimentary 3D rendering of your project and a complete proposal and estimate.  This allows you to view the finished project and see how it will fit with your existing home and landscaping.


If you are looking to create your dream outdoor living space with a local deck builder in Watkins Glen, NY, then look no further than Keystone Custom Decks.  We look forward to serving you in the process and becoming your local deck contractor!