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 Central New York State

Make your dream outdoor living space by the lake 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

Become a Master Host in Central NY with a custom deck & outdoor 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.

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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 in New York State for over 30 years.

What a great experience with this contractor.  After building my some with many different contractors I can safely say that Keystone is a cut above the rest.
They handled all the bumps and dips that come with a larger project in stride and made our outdoor space amazing. The attention to finishing detail was greatly appreciated!"
-Andrew Martinez

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 the 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.

"Keystone is a top-tier deck builder. They helped design and bring to life the vision my wife and I had for our new deck with three season room. They handled everything which freed us from having to hire engineers and architects. The team was prompt and cleaned up the work area each day and neatly put things away without leaving messes."

- Dave Garrison

"We couldn’t be happier with our carport and outdoor living space built by Keystone Custom Decks! They are beyond an amazing team of guys who are extremely hard working, very nice, professional, and punctual, and they always kept in contact throughout the entire project. The quality of work was absolutely amazing and I can not believe how fast it got done, this is a top notch company!"

- Gavin Polmanteer

"Keystone custom decks have been by far the most professional, courteous, and responsive team we have ever worked with. From the initial design meeting to the end of our project, all members of the team were exceptional. The quality of work is absolutely beautiful. We love our deck!"

- Alexa Schooley

"We are absolutely thrilled with the front and back decks that Keystone built for us! From the design process with Mahlon to the crews who worked tirelessly each day to complete the process, Keystone is definitely a professional and skilled contractor."

- John Ellis

Custom Decks in
Central NY State

Keystone Custom Decks stands out as the deck builder in New York who crafts showpiece projects tailored to our customer’s unique visions. From gorgeous sundecks to extravagant covered porches, if you can dream it, we can build it! As a true luxury deck contractor we build outdoor living spaces using premium materials like ultra-low maintenance vinyl and composite deck boards.

Located in Keuka Park, we are well-positioned to serve as the custom deck builder in New York’s Finger Lakes region and beyond. Due to our central location, we often build decks, patios, porches, and other outdoor living spaces throughout Central NY.

The next step towards having the outdoor living space of your dreams is to schedule with the standout custom deck builder in New York — Keystone Custom Decks. Every single deck, porch, and patio we build begins the same way: with a conversation. Schedule your free in-home consultation with a Keystone Custom Decks outdoor living designer.

Not only will you be able to work with the designer to refine your vision for the outdoor space tailored to your needs, but you’ll also be able to get a free quote. Whether you’re ready to schedule a consultation or you just have more questions for our team, contact us to start the conversation!

John Brisbois: "Keystone Custom Decks is the best contractor we have ever dealt with. From initial contact with Mahlon to project finish and cleanup, they were responsive and professional.

It’s amazing how fast they completed our deck project along with the excellent workmanship. Kevin and the crew showed up early in the morning and all members stayed busy all day. Whenever a decision needed to be made in construction, they kept us in the loop.

We will be recommending them to others and will contact them if we need something else that they can do."


Len Swain: "The crews that worked at our house were all great guys, talented, skilled, friendly and very willing to make sure the final product was something special. Everyone that sees our deck/ patio have made very favorable comments on the high quality of workmanship. Thank you Keystone for the outcome that we envisioned.


Terese Genecco: "We love our new deck! The entire experience was relaxed and professional from the initial quote process with Mahlon through to the final product with Anthony and his crew of very hard workers. The gift of wine and two etched wine glasses was a lovely finishing touch! We highly recommend Keystone Custom Decks. They are replacing my father's deck next and he can hardly wait after seeing the quality of ours!"

Are you ready to start designing your dream outdoor space?

Read our FREE e-book to learn the questions you need to ask when you begin designing your dream outdoor living space!