Deck replacement
We tear out the old deck and build a new one with new footings, framing, decking, railings and stairs, built to current code.
Main Line deck builder · Deck replacement · Deck repair
Your deck has had a good run. Let’s build the next one right.
Most wood decks last about 20 years, and many Main Line decks are older than that. Mainline Decks is a local deck contractor that handles deck replacement and deck repair in Wayne, Bryn Mawr, Villanova, Radnor, Ardmore and across the Main Line, from the first visit to the final walkthrough: design, a fixed price in writing, permits and the build.
- PA HICPA-registered contractor
- Fully insured
- Fixed-price written proposals
Before
After
~20 yrs
typical life of a wood deck
Is it time? Common signs a deck needs work
- 01Soft, cracked or splintering boards
- 02Wobbly railings or loose stairs
- 03Rot at posts, joists or the ledger board
- 04Rusted fasteners, nails or connectors
- 05A home inspection report that flagged it
- 06It’s 15 to 20+ years old and showing it
What we do
Decks are all we do: deck replacement, repair & resurfacing
As a deck-only contractor serving the Philadelphia Main Line, we know the materials, the code requirements and the local township permit offices well.
Deck resurfacing
If the frame is still sound, we put new boards and railings on it. It costs less than a full rebuild and looks new.
Deck repair & structural repair
Footings, posts, beams, joists and ledger connections. We fix the parts that keep a deck safe, which are often the parts nobody sees.
Deck railings & stairs
Wood, composite or aluminum railings, new stairs, handrails and landings that are solid and meet code.
Composite decking upgrades
Composite and PVC decking that doesn’t need yearly staining or sealing and won’t splinter.
Outdoor living add-ons
Deck lighting, pergolas and other finishing touches, either on their own or added to a new build.
Pricing
What a new deck costs
Typical installed prices on the Main Line, based on a 16 x 16 deck (256 sq ft) about 4 ft off the ground. Full replacement includes tear-out, new footings and framing, the permit and cleanup. Height, access, stairs and railing change the number, so we give you a fixed price in writing after a free site visit.
| Decking material | Full replacementper sq ft | 16 x 16 examplefull replacement | Resurfacingper sq ft |
|---|---|---|---|
| Pressure-treated wood | $72–$88 | $18,500–$22,500 | $40–$49 |
| Composite, standarde.g. Trex Enhance | $81–$99 | $20,500–$25,500 | $49–$60 |
| Composite, premiume.g. Trex Select or Transcend | $85–$104 | $21,500–$26,500 | $53–$65 |
| PVC | $88–$107 | $22,500–$27,500 | $56–$68 |
Railings
Wood about $30, composite about $65 and aluminum about $125 per linear foot, installed.
Stairs
About $160 per step, installed. Landings and handrails are priced with the stairs.
Material cost check
Trex’s own calculator puts the materials alone for a 16 x 16 composite deck at about $4,800–$9,000, depending on the line.*
Ranges are estimates, not quotes, and can change with material prices. * Trex Deck Cost Calculator, trex.com, November 2026; materials only, with pressure-treated framing and hidden fasteners. Trex, Enhance, Select and Transcend are trademarks of Trex Company, Inc. and are named to show the class of product; Mainline Decks is not affiliated with Trex.
For sellers, buyers, agents & landlords
Fast, clear quotes when a sale is on the line
A failing deck can slow down a listing or show up in an inspection report. We work with real estate people every day, so we know how much timing and paperwork matter.
- Pre-listing repairs so the deck isn’t a problem when buyers see it
- Inspection-report fixes with written scopes you can hand to the other side
- Investors & landlords: turnover and rental-property deck work
- A good return at resale: deck projects in the Philadelphia market recoup roughly 87–90% of their cost*
* Zonda, 2025 Cost vs. Value Report, Philadelphia.
Partner program
Refer a client. We’ll take good care of them, and of you.
Real estate agents, home inspectors, property managers, landlords, investors and home-service pros send us their clients’ deck projects. We reach out within one business day, keep you posted at every step, and say thank you for every referral that becomes a signed project.
- Quotes fast enough for inspection deadlines
- Written scopes you can hand to the other side
- Free pre-listing deck checks for your sellers
- Updates at first contact, proposal, signing and completion
- Fixed-price written proposals, so your name stays attached to a good experience
- A thank-you for every referral that signs
Real estate referral rewards are paid to your brokerage under a written agreement and disclosed to your client. Home inspectors are not paid referral rewards. Questions about the program? Call 267-225-8520.
How it works
One point of contact, from the first visit to the final walkthrough
Inspection
We visit, measure, and check the condition of the boards, framing and footings.
Design
We go over size, layout, materials and railing styles with you, and help you weigh cost against upkeep.
Fixed-price proposal
You get a written proposal that lists what’s included and what isn’t. The price won’t change unless the scope does.
Permit
We handle the township permit and inspections.
Build
Insured, vetted crews do the build, and we manage the schedule and quality.
Punch list & closeout
We do a final walkthrough with you and finish every item on the list before we call it done.
Licensed & insured
We are registered under Pennsylvania’s Home Improvement Consumer Protection Act and carry full insurance.
Transparent pricing
Our proposals are itemized, in writing and use fixed prices, with no surprises after you sign.
We get back to you
We return calls and answer questions, and we keep you updated from the first visit through closeout.
Local
We are based on the Main Line and know the homes, neighborhoods and township permit offices here.
Service area
Deck builder serving the Main Line & Greater Philadelphia
We’re based on the Main Line and work across Southeastern Pennsylvania, South Jersey and the Jersey Shore.
MontgomeryChesterDelawareBucksPhiladelphiaSouth JerseyJersey Shore
Including
- Lower Merion
- Haverford
- Radnor
- Tredyffrin
- Easttown
- Bryn Mawr
- Ardmore
- Wayne
- Villanova
- Gladwyne
- Narberth
- Berwyn
- Malvern
- Newtown Square
- Upper Dublin
- Lower Makefield
- Northwest Philadelphia
Don’t see your town? Call and ask. We probably cover it.
Questions
Deck replacement & repair FAQs
Do I need to replace my deck, or can it be repaired?
It depends on the structure. If the footings, posts and framing are sound, resurfacing or targeted repairs may be all you need. We’ll check the structure during the assessment and give you an honest recommendation.
Wood or composite?
Pressure-treated wood costs less up front. Composite and PVC cost more but don’t need yearly staining or sealing, and they won’t splinter or rot. We’ll show you both and explain the trade-offs.
Do you handle permits?
Yes. We pull the building permit and schedule the inspections your township requires.
How does payment work?
We follow Pennsylvania’s Home Improvement Consumer Protection Act. You get a written contract, a 3-day right to cancel, and a deposit at signing, usually about one third. The rest is due as the work is completed.
When should I book?
Most decks are built between spring and fall. If you sign in winter or early spring, you’ll get a better spot on the build schedule.
Free estimate
Tell us about your deck
Fill out the form and we’ll contact you to set up an on-site assessment. Or call or email us directly.
- Phone267-225-8520
- EmailMainlinedecks@gmail.com