Serving Eastern Pennsylvania, Maryland, and Delaware
Transform Your Outdoor Space into Something Outstanding
Covered Decks · Porches · Pools · Patios · Outdoor Kitchens · Pergolas · Fire Features
40+
Years Experience
100+
Team Members
Lifetime
Warranty
Southeast PA
& Surrounding Areas
What Clients Say
Trusted by Homeowners Across PA
"Keystone was the only one that provided detailed renderings that truly showed us exactly what our space could look like before we even committed."
Catherine Jones
Custom Pool & Patio
"It's a level of details and customer service you just don't get from most companies. They treat you like family."
Amy Lo
Multi-Level Deck & Outdoor Kitchen
"From start to finish, our experience with Keystone has been nothing short of amazing."
John Broskey
Custom Covered Porch & Deck
"From initial concepts & renderings, to the build process and quality - it's been flawless."
- Lisa Graham
5.0
Average Google Rating
Get Started
Let's Talk About Your Outdoor Space
Keystone projects typically start at $50,000. We serve homeowners who want a complete, premium outdoor living experience - not a quick fix.
Answer three quick questions to help us understand your project - then a Keystone designer will be in touch within one business day.
Get Started
Let's Talk About Your Outdoor Space
Keystone projects typically start at $50,000. We serve homeowners who want a complete, premium outdoor living experience - not a quick fix.
Answer three quick questions to help us understand your project - then a Keystone designer will be in touch within one business day.
One Team, Everything Included.
We do it all from start to finish.
No Coordination Headaches.
From your first on-site design visit to the final walkthrough, Keystone handles every step: design, permits, materials, build, and cleanup. You deal with one team and one team only.
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Design & Rendering
Full photorealistic 3D visualisation of your space before anything is signed.
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Permits & Approval
We handle every permit, approval, and inspection end-to-end.
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Full Build & Cleanup
One team, from first on-site visit to final walkthrough and cleanup.
Before & After
See the Transformation
Main
Deck
Porch
Fireplace
Patio
Pool
See it before we build it
No commitment to a build until you've seen exactly what you're getting.
Every project includes a full photorealistic 3D rendering of your outdoor space - decks, pools, kitchens, fire features, and all. You'll walk through your future backyard virtually before we file a single permit.
Visit us in person
Most Customers Tell Us - The Showroom Visit is When It Clicked.
Come see full-scale material displays, walk through completed project examples, and meet the team before you commit to anything. Our showroom in East Earl, PA is open by appointment.
Trusted Brands We Work With
How it Works
Three Steps to Your Dream Space
A simple, transparent process - from first call to final reveal.
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Book Your Consultation
Share your vision with our team. We come to you for a free on-site assessment of your space and goals.
Within 48 hours -
Review Your 3D Design
See your space transformed in photorealistic detail before anything is approved, ordered, or signed.
1-2 Weeks -
We build. You Relax.
Our 100+ person team handles every detail - permits, build, cleanup, and a final walkthrough with you.
Per Project Timeline