Deck Builder in Markham | Custom Decks Built to Last
Custom deck construction and installation for Markham homeowners. Licensed, insured, and backed by a workmanship warranty. Serving Markham and every York Region neighborhood.
Your trusted deck contractor in Markham, York Region, ON
Markham families count on JJ Deck & Fence for premium backyard builds — from Cornell composite decks to Unionville cedar fences. We deliver executive-grade finishes with the same care and cleanliness we bring to every GTA project.
We serve every Markham neighborhood — including Unionville, Cornell, Cathedraltown, Berczy Village, Wismer, and Thornhill. Our team knows the local soil, weather patterns, and municipal requirements so every deck we build in Markham is engineered to perform.
Markham's larger lots and executive homes call for wider deck spans, engineered composite systems, and taller privacy fencing — all specialties of ours.
Premium deck materials for Markham homes
We install every major material category so you get the right deck for your budget, aesthetic, and maintenance preferences.
Composite Decking
Trex, TimberTech and Fiberon capped composite — 25+ year warranties, no staining, splinter-free.
Western Red Cedar
Naturally rot-resistant with warm classic tones. Ages to a silvery patina or holds its color with sealer.
Pressure-Treated Pine
Cost-effective, structurally strong, and ideal for framing or budget-conscious builds.
Tropical Hardwoods
Ipe, Cumaru and Garapa — the longest-lasting real-wood option, 30+ years with minimal care.
How we build in Markham
Free On-Site Consultation
We visit your Markham home, take measurements, and listen to how you want to use your outdoor space.
Design & Written Quote
You get a detailed drawing, material options, and a fixed written quote — no surprises later.
Permits & Preparation
City of Markham enforces strict deck and fence bylaws, including maximum fence heights and setback rules. We navigate them so you don't have to.
Build & Finish
Our crew builds efficiently, keeps the site clean, and hands over a deck ready for years of use.
The deck builder Markham homeowners recommend
JJ Deck & Fence isn't a large franchise. Julien John personally oversees every Markham project so quality never gets diluted between the sales pitch and the finish.
- Licensed & fully insured Ontario contractor
- Free written estimates with fixed pricing
- Premium materials from trusted GTA suppliers
- Workmanship warranty on every project
- Clean daily job sites — we respect your home
- Local Ajax-based crew, quick response times
Deck Builder FAQ — Markham
How much does a custom deck cost in Markham?
Most Markham decks fall between $45–$90 per square foot for pressure-treated builds and $85–$160 per square foot for composite decking including framing, footings, railings, and finishing. We provide a fixed written quote after a free on-site consultation.
How long does deck construction take in Markham?
A typical Markham single-level deck takes 5–10 working days once permits are approved. Larger multi-level or composite builds run 2–3 weeks. Weather can shift timelines slightly, but we always give a realistic schedule up front.
Do I need a permit to build a deck in Markham?
Usually yes — decks attached to the house or over 24 inches off grade require a municipal building permit in Markham. We prepare drawings and submit the permit application as part of your project.
What's the best deck material for Markham winters?
Capped composite (Trex, TimberTech, Fiberon) and western red cedar both perform excellently through Ontario winters. Composite offers 25+ year warranties with no staining; cedar delivers classic wood aesthetics and natural rot resistance.
Do you offer free estimates in Markham?
Yes — every Markham consultation and detailed written estimate is 100% free with no obligation. Call or text +1 (647) 787-3042 to book.
Are you licensed and insured?
Yes. JJ Deck & Fence is a fully licensed and insured Ontario contractor. Proof of insurance is available on request before any work begins.
Do you handle old deck removal?
Yes, we tear out, haul away, and dispose of your existing deck so you get one clean turnkey project.
Do you offer a warranty on Markham decks?
Every deck we build comes with a workmanship warranty from JJ Deck & Fence in addition to the manufacturer's material warranty on composite or metal railing systems.
Ready to Transform Your Property?
Get a free, no-obligation consultation and estimate from Julien John and the JJ Deck & Fence team.