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 Finger Lakes, NY

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

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

  • 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 a custom deck builder in the Finger Lakes for over 30 years.

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


    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.

"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

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.
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 in the Finger Lakes region for over 30 years.

We are a custom deck builder in Finger Lakes, NY.  We are based at the north end of Keuka Lake and service most of the Finger Lakes region.

We serve towns and lake areas including:

  • Seneca Lake area
  • Keuka Lake area
  • Cayuga Lake area
  • Canandaigua Lake area
  • Honeoye Lake area
  • Owasco Lake area
  • Skaneateles Lake area
  • Waneta Lake area
  • Lamoka Lake area
  • And many more!

If you live in or regularly visit the Finger Lakes, then you know the beauty and outdoor activities that abound in the area.  After a day doing a wine tasting, hiking through Watkins Glen State Park, or enjoying a day on the lake; come home to your dream outdoor space to relax and unwind! 

The Finger Lakes region in New York is a picturesque and diverse area known for its stunning lakes, rolling hills, vineyards, and charming small towns. The region gets its name from the 11 narrow and long lakes that resemble fingers, each with its own unique character and attractions. This area is renowned for its natural beauty, outdoor recreation, wineries, and cultural offerings. Here, we'll provide an overview of the Finger Lakes region as a whole, with a focus on some of its key features and attractions.

Natural Beauty and Outdoor Activities:

The Finger Lakes region is a haven for outdoor enthusiasts. The lakes themselves offer opportunities for boating, fishing, kayaking, and swimming. The rolling hills and numerous parks in the region provide ample hiking and biking trails, camping areas, and bird-watching spots. Popular parks include Taughannock Falls State Park, Watkins Glen State Park, and Letchworth State Park, known as the "Grand Canyon of the East."

Wineries and Vineyards:

The Finger Lakes is one of New York's premier wine-producing regions, with over 100 wineries and vineyards. It's particularly known for its Riesling wines, but you can also find excellent reds, whites, and other varietals. The Seneca Lake Wine Trail, Keuka Lake Wine Trail, and Cayuga Lake Wine Trail take visitors on scenic wine-tasting tours.

Cultural and Historical Sites:

The region is rich in history and culture. You can explore the Women's Rights National Historical Park in Seneca Falls, which played a pivotal role in the women's suffrage movement. The Corning Museum of Glass in Corning showcases the art and science of glassmaking. The National Susan B. Anthony Museum & House in Rochester is another important site for women's history.

Charming Small Towns:

The Finger Lakes region is dotted with charming small towns and villages, each offering a unique experience. Some popular towns include:

  • Skaneateles: Known for its pristine lake and upscale shops and dining.
  • Canandaigua: Home to Canandaigua Lake and a vibrant downtown with a historic district.
  • Geneva: Situated on Seneca Lake, it features a bustling downtown and Hobart and William Smith Colleges.
  • Ithaca: Home to Cornell University and Ithaca College, known for its progressive culture and stunning gorges.

Events and Festivals:

Throughout the year, the Finger Lakes region hosts numerous events and festivals. The Naples Grape Festival, held in Naples, celebrates the grape harvest. The Lilac Festival in Rochester is renowned for its blooming lilac bushes and entertainment. Additionally, there are various wine and food festivals showcasing the region's culinary delights.

Outdoor Sports and Recreation:

Outdoor enthusiasts can enjoy activities like skiing in the winter at Bristol Mountain or Greek Peak, and in the summer, there's golfing, boating, and cycling. Anglers will appreciate the excellent fishing opportunities in the region's lakes and streams.

Culinary Scene:

The Finger Lakes region is increasingly becoming known for its farm-to-table dining experiences. The region's agriculture and wineries contribute to its culinary excellence. You can enjoy locally sourced dishes, artisanal cheeses, and fresh produce at many restaurants.

The Finger Lakes region offers a diverse range of experiences for residents and visitors alike, from outdoor adventures to cultural explorations and culinary delights. It's a destination that invites you to relax, unwind, and savor the beauty of the lakes and surrounding landscapes.

For more information about the Finger Lakes region, its attractions, and community resources, you can visit the official Finger Lakes Tourism Alliance website:

We are happy to serve the towns and zip codes in the Finger Lakes region. 

Watkins Glen, Ithaca, Auburn, Seneca Mills, Geneseo, South Bristol, Canandaigua, Skaneateles, Penn Yan, Seneca Falls, Lodi, Hammondsport, Aurora, Geneva (city), Canandaigua, Geneva (town), Waterloo, Naples, Corning, East Syracuse, Fair Haven, Fayette

13021, 13026, 13152, 14456, 14512, 14527, 14840, 14850,14851, 14853,13027, 13031,13033,13034,13039, 13040,13043, 13045, 13050,13051, 13053, 13055, 13057, 13060,13062, 13063, 13064, 13065,13066

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!