Create

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
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Deck Builder in Finger Lakes, NY

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

Patios
Porches
Decks
Pergolas

Additional Features

Outdoor Kitchens
Firepits and Fireplaces
Water Features
Masonry Features

 “The most professional

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

- Guiseppe Troisi
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Become a Master Host in the Finger Lakes with a New Backyard Deck

  • Happy Friends Having Lunch

    Host Great
    Parties

    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.

  • Smiling man crossing his arms

    Be Proud
    of Your Space

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

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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 the Finger Lakes for over 30 years.

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“Keystone Custom Decks is a superb company.  From the quality of their work, to an extreme knowledge of decks, politeness, and extremely pleasurable workforce, they have transformed our deck to an outside paradise. 

These guys are legit.  I would recommend this company to whoever is looking to build a new deck or upgrade their current one.

-Dejan Jozic

We make a new deck in Finger Lakes 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

    Installation

    Sign your proposal and watch your dreams become reality.

  • 4

    Enjoy

    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: 
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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.

Integrity

We deliver on our timeframe and proposal promises.

Financing Available

We offer financing options through our partners.

"We have been so impressed with Keystone Decks: the company, the crew and the workmanship. The design process was a breeze, thanks to Mahlon, and I cannot say enough how much we appreciate the quality of work that they did. Anthony was incredibly professional and kept us updated on their progress. We were particularly impressed with how they handled the flashing issues that arose, and we both felt that they built this deck as if it was their own. They cleaned up the site every day and it was immaculate when the project was completed. We cannot believe the two of them built this deck in 3 days. We also appreciated the prompt communication from Mahlon. Any time we had a question, or a design change. he responded immediately. The work began about a week earlier than estimated, and was completed a day or two quicker than estimated. Thanks again and we will certainly recommend your company to relatives, friends and neighbors as their needs arise."

- Dawn Emery

"Keystone Custom Decks was a pleasure to work with from start to finish. The planning stage was easy. Mahlon is very knowledgeable and provided us with recommendations to make the deck more ascetically pleasing as well as CAD models to finalize design options. The team who built the deck was highly skilled, which is clear in the final result. Also, the build team was patient and considerate of our family. Plus, the price we paid was a great value. My family and I couldn't be happier with the result. We highly recommend Keystone to anyone looking to build a deck & increase the value of their home."

- Erica Loewenguth

"Mahlon and crew did a fantastic job with our deck. They were spot on with the design, flawless craftmanship and communication all along the way. Al of my neighbors have asked about our deck and how incredible it looks. I would highly recommend Keystone to anyone who wants a fabulous deck with amazing customer service."

- Nate Scozzaro
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Custom Decks in
the Finger Lakes, NY

As a homeowner or cottage owner in the Finger Lakes, you want a beautiful outdoor living space that adds to the beauty of your home or lake house. 
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.

Finger Lakes 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 the Finger Lakes.

We also offer the following:

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