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

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

Deck Builder in Delaware County, PA

“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

 “We’re very excited

to use our new outdoor space.  With football season around the corner it will get a lot of use!”

- Erica Evans

“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 Delaware County 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.

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 dream decks in Delaware County for over 30 years.

“We could not be more pleased with Keystone Custom Decks.
From the first meeting when Ron came to our house, to the completion of our project, the experience was exceptional.
The entire Keystone team is extremely professional, and they were a pleasure to work with every step of the way.
-Jack Mason

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
“Keystone just finished our deck today!  They started in the timeframe they noted in our quote.  They sent a 3D rendering of the finished product and were so easy to communicate with  Would definitely recommend!”
- Krista Alfonse

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 had an excellent experience that started with Mahlon who designed a beautiful plan for our new deck and carried all the way through the project from start to finish.  Our deck looks beautiful and we can't wait to enjoy it this summer.

- Jackie Tonetti

“I really can't say enough of great things about this company, their people, and the amazing work they do.  It truly is our dream deck that we will forever be grateful for.  These guys are simply the best, and I highly recommend them if you are considering a deck project for your home  I can assure you that you will be happy you chose Keystone!

- Scott Mulvaney

"A most excellent experience with Keystone Decks.  We thought we had an idea of the finished product, but the reality far surpassed any! The deck construction was evidence of a great work ethic, and an example of quality throughout.  Well done and God bless to all involved in our deck project.

- Hu

"Extremely happy with our new composite deck, can't wait for spring!  Our primary crew members arrived early every day to set up their work area, clearly master craftsman that took pride in their work.  The project was completed in short order.  Highly recommend!

- John Schwing

"Keystone Custom Decks exceeded our expectations in every way!  The workers showed up on time, every time.  They completed the project on time.  They were all hard workers and clearly experts in their field.  Trust in a contractor can be a difficult thing to find, but not with Keystone.

- Robert Wagner

Delaware County PA Deck Builder

If you own a home in Delaware County, you want a beautiful outdoor living space for hosting, relaxing, and spending quality family time.  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 with additional features for over 30 years.

We are a custom deck builder in Delaware County, PA, including the following locations:

  • Wayne
  • Havertown
  • Newtown Square
  • Glen Mills
  • Chadds Ford
  • Concordville
  • Aston
  • Boothwyn
  • Chester
  • Media
  • Swarthmore
  • Springfield
  • Ridley Park
  • Glenolden
  • Darby
  • Lima

And much more in the greater Philadelphia area!

We also serve the following zip codes in Delaware County:

  • 19014, 19015, 19008, 19010, 19317, 19013, 19017, 19319, 19018, 19023, 19026, 19022, 19029, 19032, 19033, 19342, 19036, 19083, 19043, 19061, 19063, 19070, 19073, 19074, 19113, 19076, 19078, 19079, 19079, 19064, 19081, 19373, 19082, 19085, 19086, 19087, 19094, and 19050

Joanne A:  "Keystone Custom Decks is top notch! After meeting with Ron Yoder, there was no doubt that they could make our project come to life. Thank you Ron, for everything. We are so incredibly happy with our experience with this fine company and highly recommend them to everyone who is considering a backyard transformation. Their attention to every single detail and their superior workmanship is by far the very BEST! Our site manager, Steven, and his team of Jay and Willy were a pleasure to have here every day. They arrived at the same time every single morning and worked continuously all day, and cleaned up after each day. Thank you Steven, Jay and Willy for your outstanding workmanship and top notch professionalism! Thank you to everyone else behind the scenes at Keystone who helped to transform our backyard into more than we ever dreamed of!"

Hayler O:  "We had a pergola installed over a portion of our deck yesterday. The crew arrived right on time. They installed the pergola in a timely professional manner. It looks beautiful and really enhances the appearance of our home. And the price was significantly less than other estimates. The crew cleaned up afterwards. Nice group of men. If I need any deck work, this is the company I will call."

Ryan D:  "We put up a pavilion in the back yard and did a flagstone front walkway. Levi, Steve, Amos, and Eric were in and out in about 8 working days. The guys show up early and stay late. Left a very clean site every day, and worked with us on changes. All of the little details were taken care of and they did 100% of the job in a timely fashion....something that is unfortunately rare when hiring contractors. I would recommend to anyone and hire them again for any project."

Custom Decks in
Delaware County, PA

To make your dream backyard a reality, we also know that you may want more than just a deck.  That is why we are more than just a local deck builder; we also offer multiple custom features to go along with your custom deck.
We build porches, patios, pergolas, outdoor kitchens, fire pits and fireplaces, masonry features, and water features to accompany your custom deck.
All of these features will allow you to create a personalized space where you will make new memories, share family meals, relax in your backyard, and become a master host with a beautiful outdoor space.

At Keystone Custom Decks, every team member is committed to the success of your new deck and outdoor project, and also in keeping you informed throughout the process.  From the initial estimate to the final product, our team of deck builders and deck contractors will walk with you each step and keep you informed.


We give you a detailed proposal and complimentary 3D rendering of your project.  We want you to be able to see what the finished project will look like before construction begins, that way you can make any necessary changes.


If you are looking to create your dream outdoor living space with a local deck builder in Delaware County, PA, then look no further than Keystone Custom Decks.  We look forward to serving you in the process and becoming your deck contractor!

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!