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 Canandaigua, 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 Canandaigua with a custom 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.

  • 660460

    Be Proud
    of Your Space

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

Download our catalog to see everything we offer with our custom decks!

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 a custom deck builder in Canandaigua for over 30 years.

Working with Keystone Custome Decks was a delightful experience!  From the initial quote, to working with us on budget and amending the design several times, it was a better experience than we could have hoped for!
That's not even mentioning the amazing professionalism and efficiency of the crew, and best of all - our beautiful deck!  It is everything we could have hoped for and more!
It was a headache-free experience from start to finish.  These are the people to talk to!"
-C. Hepler

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.

"The team that built the deck was awesome.  They were all beyond friendly, and it was obvious that they knew what they were doing and took pride in doing it right."

- Joe Roth

"From the start, the the team worked very hard with me to come up with a great design for my deck and gazebo.  The builders were meticulous in their work, very polite, conscientious, and respectful.  Thanks so much!"

- Sandra Cheung

"We are so happy with every last detail of our project.  Nothing was left as a future regret.  Our project was everything we hoped it would be and more.  They have exceptional service and commitment to their product and customer.  Thank you for a job well done."

- Chris O.

Custom Decks in
Canandaigua, NY

If you own a lakehouse or home in Canandaigua, 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 serving the Canandaigua Lake area in NY.  We serve nearby towns and areas including:

If you live in Canandaigua or along the lake, then you know the beauty of the lake and the many activities in the surrounding area.  After a day enjoying the Ontario County Fair, spending a day on the lake or Kershaw Park, or enjoying a family day at Roseland Water Park; come home to your dream outdoor space to relax and unwind! 

The Canandaigua region has a lot to offer both tourists and locals! Examples include: 

  • Sonnenberg Gardens &Mansion State Historic Park
  • Granger Homestead & Carriage House Museum 
  • New York Kitchen 
  • Canandaigua Lake Wine Trail 
  • Skenoh Island
  • City Pier
  • Kershaw Park 
  • Roseland Waterpark 
  • Onanda Park 
  • Leonard R. Pierce Memorial Park 
  • And so much more!

Canandaigua City, New York is a city in Ontario County New York, and is the county seat. It was founded in the mid-1800s near the historic indigenous village of Ganandogan. It was an important railroad stop and a dock for steamboats that operated on the late. It is surrounded by the Town of Canandaigua, a town at the North end of the Canandaigua Lake. The town was settled in 1789 and became an official town in 1791. 

We are happy to serve Canandaigua City and the Town of Canandaigua, zip code 14424. 




Helen K - "Our deck came out as planned, it is beautiful. The Keystone team was very professional, polite, and accommodating. The employees were friendly and respected our interest to socially distance while still keeping us informed of the progress and options. The workmanship was only eclipsed by their work ethic. I would highly recommend Keystone."

Terese G - "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!"

Kate K - "We cannot say enough good things about our experience with Mahlon and his team. From design to installation, everything was perfect. The crew was extremely professional and efficient. The workmanship and materials are superior and our deck came out beautiful. We would highly recommend Keystone Custom Decks."

Mark V - "We’ve completed many upgrades to our house in the last three years and Keystone Custom Decks was by far the best contractor we worked with. Mahlon did an excellent job of helping us design the perfect deck. He made design suggestions, provided multiple pricing options, and supplied a full-color rendition of the proposed deck, using our actual house, with his quote. In terms of pricing, their price was competitive and included more features than the other contractors who supplied estimates. The finished product matched the supplied full-color rendition exactly. The crew cleaned up every day and on the final day left the area in better condition than when they started the job. They were the best work crew we have had work on our house."

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.

We also offer the following:

All these features will make your backyard dreams come true and make you a master host, whether you live along Canandaigua Lake or in the surrounding area!