About Mainline Decks · Main Line deck builders

Built on experience. Focused on quality.

Mainline Decks was founded with a simple mission: give homeowners across Philadelphia’s Main Line and the surrounding communities dependable, high-quality deck replacement, construction and repair.

We bring together two kinds of expertise: hands-on construction and homebuilding, and deep experience in real estate, property improvement and business development.

Many established Main Line homes have decks that need repair, renovation or full replacement. We believe those homeowners deserve honest recommendations, transparent pricing, experienced builders and a simple process from start to finish. Whether we’re repairing an existing deck or building a new outdoor living space, our focus is quality work and a good experience for you.

Main Line deck replacement before and after: weathered gray deck boards next to new deck boards

Before After

Meet the founders

Two local professionals, one standard of work

One of us has spent his career building. The other has spent his in real estate. Together we cover both sides of a deck project: how it’s built, and what it means for your home.

Sean McKenna

Co-Founder · Construction & Homebuilding

Experienced contractor & home builder
PA HIC registration #PA128558
OSHA 30-Hour Construction trained

Sean McKenna is an experienced contractor and home builder. His hands-on background in contracting and residential construction gives him a practical understanding of what makes an outdoor structure safe, solid and built to last, and a real respect for proper construction methods and attention to detail.

At Mainline Decks, Sean leads the construction side of every project: evaluating existing decks, working through building and permit requirements, guiding the build and holding each job to a high standard of workmanship. His approach is simple: do the job right, communicate clearly with homeowners and deliver results they can feel confident about.

Sean went to La Salle College High School and is an experienced rowing coach. He served as head rowing coach at Villanova University and has also coached at Temple University, the University of Texas and the University of Notre Dame, and as an athlete he was selected for Team USA at the Junior Olympics. He came back to Philadelphia because of his passion for real estate and his contracting experience, and he brings a coach’s preparation and discipline to every project.

Sean on LinkedIn

Timothy Keene

Co-Founder · Real Estate & Business Development

In real estate since 2015
Mid-Atlantic real estate

Timothy Keene brings more than a decade of experience in real estate acquisitions, investment sales and property development. Since starting his real estate career in 2015, he has worked with property owners, investors and developers throughout the Mid-Atlantic real estate market.

That work taught him how much property maintenance and smart improvements matter to protecting a home’s long-term value. Seeing how many established homes across the Main Line and surrounding communities have aging decks, Timothy saw the opportunity for a company focused specifically on deck replacement and repair.

At Mainline Decks, Timothy leads business development and customer relationships, and works to make the process simple and organized for every homeowner. Paired with Sean’s construction expertise, his real estate background gives the company a balanced approach that combines craftsmanship, professionalism and customer service.

Timothy on LinkedIn

Why we started Mainline Decks

A local business built around a real need

Philadelphia’s Main Line is full of established neighborhoods and beautiful homes, and many of them have decks that have taken decades of seasonal weather and everyday use.

As those decks age, homeowners have to decide whether to repair, resurface or replace them. We founded Mainline Decks to make that decision, and the work that follows, easier.

By combining Sean’s construction and homebuilding background with Timothy’s real estate and business development experience, we built a company that gives homeowners a dependable, straightforward option for their outdoor living spaces. Our goal is to be known for honest communication, quality workmanship and long-term customer relationships.

Why choose Mainline Decks

What you can expect from us

Experienced construction leadership

With Sean’s background in contracting and homebuilding, every project is guided by practical construction knowledge and a commitment to quality workmanship.

Local real estate knowledge

Timothy’s real estate experience brings an understanding of the local housing market and of what it takes to protect and improve a home.

Transparent pricing & communication

You should know what you’re paying for, what work will be done and what to expect at every stage. Our proposals are written, itemized and fixed-price.

Professional project execution

From the first consultation and project planning through construction and the final walkthrough, we run an organized, dependable process.

Our service area

Deck builder serving the Main Line and the communities around it

Mainline Decks serves homeowners throughout Philadelphia’s Main Line and across Southeastern Pennsylvania, with work in South Jersey and at the Jersey Shore as well.

MontgomeryChesterDelawareBucksPhiladelphiaSouth JerseyJersey Shore

Including

Wayne
Villanova
Bryn Mawr
Ardmore
Gladwyne
Berwyn
Malvern
Newtown Square
Narberth
Haverford
Radnor
Lower Merion
Tredyffrin
Easttown
Upper Dublin

Plus other communities throughout Montgomery, Chester, Delaware, Bucks and Philadelphia Counties. Don’t see your town? Call and ask.

Let’s build something better.

Whether your deck needs a few repairs, a complete replacement or an entirely new design, Mainline Decks is here to help.

Get a Free Estimate Call 267-225-8520

Or email us at Mainlinedecks@gmail.com