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 Penn Yan, 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 Penn Yan 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

    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.

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.

“From start to finish, Keyston was extremely comprehensive, communicative, prompt, and professional.  Our completed project is exactly what we've been dreaming of for nearly a year.
Mahlon really listened to our wants and needs.  The crew did impeccable work and were so careful with our yard and home.  We couldn't be more pleased with our overall experience."
-Jamie Anderson

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 our partners.

"Thanks Marv, Kevin, and team.  You are the best - courteous from the beginning to the end and expert craftsmen.  You designed and built exactly what we were looking for in our outside living space.  We will enjoy it for years to come."

- Charles DiComo

"Wonderful people to work with, and they offer superior quality deck and service.  I had a great experience with Ron and Levi.  Highly recommend!"

- Zhen Guo

"Fantastic job from beginning to end.  The workmen were always on time, worked the entire day, and cleaned up every evening.  I would not hesitate to recommend them to anyone!"

- Carolyn Karcher

Custom Decks in
Penn Yan, NY

As a homeowner in Penn Yan 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.

If you live in Penn Yan, NY, you understand the value of beautiful outdoor spaces that enable and enhance your enjoyment of the natural beauty around the village. 

At Keystone Custom Decks, we create outdoor spaces like decks, patios, porches, and pergolas. A deck can greatly enhance your enjoyment of the outdoors as it gives you space to relax or host friends in the great outdoors. Additionally, it adds value to your home!

Working with Keystone is simple. 1) Give us a call to get your project estimate. 2) Get a design proposal including a 3D rendering. 3) Sign the proposal and watch your dreams take shape! 4) Enjoy your beautiful new space!

If you live in Penn Yan, NY, you know of the many wonderful attractions available in and around the town. A sampling of these is as follows; 

  • Keuka Lake
  • Seneca Farms
  • Oliver House Museum
  • Keuka Outlet Trail
  • Yates County History Center
  • The Windmill Farm and Craft Market
  • Indian Pines Park
  • Arts Center of Yates County
  • Climbing Bines Hop Farm and Craft Ale Company
  • The Outlet
  • and more!

Penn Yan was founded by Quakers in 1795 and was named after two significant Quaker leaders. It is located on the north end of Keuka Lake. The town started as a small agricultural community but as the town grew industries diversified somewhat. Several mills and factories were built in the mid-1800s and transportation increased with the opening of the Crooked Lane Canal and the Northern Central Railroad in 1833 and 1850 respectively. Today, Penn Yan retains its small-town feel and has a notable arts and culture scene. 

We are happy to serve all of Penn Yan, NY. Zip code: 14527. Neighborhoods: Village Center, East Lake Road, Liberty Street, Lake Street, Keuka Lake

Austin Lapp: "I had the privilege of having Keystone install a deck/landing outside of my back door. The products they use are high end and the craftsmanship is bar none! Their employees are professional and work hard. Highly recommend!"

Ginny Turner: "After years of envisioning an outside area to enjoy views of our beautiful lake, Keystone Custom Decks made it happen! During the design phase, they provided a unique solution for the stairs and additional insights that we may not have thought of ourselves. Visually seeing the design in a 3-D format helped with fine-tuning of what we wanted. When it came to the actual construction, their expertise, precision and craftmanship was also stellar. We enjoyed everyone that worked on our job and it was evident that they also enjoyed working with each other."

Gavin Polmanteer: "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! I am truly impressed and would highly recommend them, they will exceed all of your expectations! Thank you all so much for our beautiful outdoor living space as well as our absolutely beautiful carport, you guys are amazing!"

Amber Degner: "We are thrilled with our new porches! Keystone Custom Decks went above and beyond our expectations! From the design with Mahlon to the execution with Nate and Anthony we were so impressed with their professionalism. They all were friendly and polite and so easy to work with. The exterior of house was completely transformed. We really enjoyed working with them and have committed to working with them again in the future!"

Penn Yan 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 Penn Yan.

We also offer the following:

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