Custom Deck Installation in PA, NY, MD, DE, & NJ

Personalized Custom Deck Designs

Why do you need a custom deck?

  • Low Maintenance

    Enjoy low maintenance decks with composite or vinyl decking instead of wood.

  • Create Usable Outdoor Space

    Turn unused outdoor space into an area for hosting, eating, or simply enjoying life.

  • Backbone of your Dream Outdoor Space

    Decks are the foundation and platform of your perfect outdoor living space.

Shweta Neville:

“We love our new deck and really enjoy our space every day!  The installation team was very thorough, and our end to end experience exceeded our expectations.”

Choose the features for your perfect deck

Decks - Low Maintenance Decking

Low Maintenance Decking

Synthetic material built for low-maintenance and designed for beauty and luxury.  Learn more about composite decks or PVC decks.

Decks - Low Maintenance Railing

Low Maintenance Railing

Add the finishing style and safety to your deck with a wide variety of custom deck railing.

Decks - Flush With Interior Floor

Flush with Interior Floor

To avoid unnecessary steps and tripping hazards, decks are built flush with your interior floor.

Decks - Curved Bumpouts

Curved Bumpouts

Curves add space and visual appeal to the deck.  Choose from subtle curves up to full circles.

Decks - Optional Drainage System

Optional Drainage Systems

Create a water-proof area under the deck by adding a drainage system.


Elevated Decks

Ideal for walk-out basements, elevated decks provide storage options under the deck structure. 

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

We make the process as easy as possible

  • 1

    Call Us

    We’ll learn more about your space for your deck and schedule an estimate.

  • 2

    Design Proposal

    Receive your project quote with your custom deck shown in a 3D rendering.

  • 3


    Sign your proposal and watch your dream deck become reality.

  • 4


    Love your new deck and outdoor space!

Jonathan Vandermolen:

“Absolutely stunning!  Recently completed our deck project with Keystone Custom Decks.  The process from start to finish was a great experience.”

What you can expect with Keystone Custom Decks ➡

Turn-key Projects

We take care of every step in the design and construction of your deck.

Lifetime Workmanship Warranty

We stand behind our workmanship for the life of your deck.


We build your deck on schedule and on budget.

Manufacturer Product Warranties

Decking and railing materials come with manufacturer warranties.

“Your team did a great job.  We are impressed with the quality of the workmanship.  Our neighbors that have stopped by have all had great things to say.  We will certainly pass on our great experience to our neighbors and friends.”
- Kate & Don D

Custom Decks for
PA, NY, NJ, DE, & MD

Are you wanting to build a deck and create your dream outdoor space, but you don’t know where to start?

At Keystone Custom Decks, we know how overwhelming the design and construction process can be.  That is why we offer turn-key construction, from design to construction, with our custom deck design and installation.

We welcome our clients’ most imaginative ideas for custom deck design. We often build decks that come with a full outdoor kitchen that match perfectly to adjacent dining areas. 

Our designers also enjoy crafting curved and other custom deck shapes with deck railings that add a distinctly modern flair to your outdoor space. Finally, homeowners often love accessorizing their outdoor living spaces with a firepit or fireplace, water features, or masonry features that add character and your unique style to your outdoor project.

To ensure that our custom designs match your dreams, we provide every client with a full 3D rendering of what their deck, porch, or patio will look like before a contract is ever signed. This allows us to work with you to devise the ideal design — plus, our realistic rendering ensures you love the way your project will look before work begins.

At Keystone Custom Decks, we take pride in providing expert deck construction to our customers, no matter how small or big the project.

Building a two-story deck complete with a patio or a porch is a bit more complicated than adding a basic square deck. That’s why you want to trust your custom deck to a company that specializes in it. 

The more covered spaces, features, and accessories you add to your custom deck, the more complicated it becomes in design and construction.

Unfortunately, some less-experienced companies and contractors may not know how to safely build your dream backyard deck or ensure that it meets stringent building codes.

So, while some companies shy away from in-depth projects like this — at Keystone Custom Decks, we embrace it! 

In fact, we have built our business on ambitious and precise deck installation along with our custom deck designs. 

Our team of in-house builders has several decades of combined custom deck construction to bring to your project and your backyard.

Besides being a custom deck builder in Lancaster County, Chester County, and upstate New York, Keystone Custom Decks also builds the following:

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!