Serving Markham & York Region
Deck Builder in Markham
Custom composite and cedar decks, railings, fences and pergolas for Markham homeowners — designed, permitted and built by the GTA's 5.0-rated, HomeStars “Best of” deck crew.
Experience & credentials you can verify
since 2004
covered
warranty
Your local Markham deck builder
Deck Master Inc. has designed and built decks for Markham homeowners for over 20 years. From heritage streets in Markham Village and Unionville to newer estate homes in Angus Glen and Cathedraltown, we build decks designed around how each family uses the yard. We handle the whole project in-house — design, permits, framing, decking and railings — with our own WSIB-insured crews, which is how we've earned a 3× HomeStars “Best of” record (2022, 2024, 2025), Home Depot Pro partner status and a 5.0 client rating.
What we build in Markham
Composite Decks
Low-maintenance Trex, TimberTech and Fiberon decks with 25+ year warranties.
Cedar & Wood Decks
Warm, natural cedar and value-focused pressure-treated builds.
Glass & Aluminum Railings
Clean, code-compliant railings that protect views and add value.
Pergolas & Privacy Screens
Shade structures and privacy screens that extend your season.
Local knowledge that protects your investment
Markham homes and lots have their own quirks — grade changes, mature trees, walkouts and clay soils all affect how a deck should be framed and footed. We size footings below the frost line for Ontario's freeze-thaw cycles, plan around drainage and existing landscaping, and design to suit the architecture of the home rather than dropping in a generic rectangle. Getting these fundamentals right is what separates a deck that still feels solid in fifteen years from one that heaves or sags after a couple of hard winters.
- Deck designs matched to Markham lot sizes, slopes and home styles
- Frost-depth footings engineered for Ontario's winters
- Multi-level and walkout decks for sloped and raised properties
- Low-maintenance composite or natural cedar — your choice
Permits & approvals
Most decks more than 600 mm above grade, or attached to the house, need a building permit from the City of Markham and must respect local zoning setbacks. Deck Master prepares the drawings and manages the permit process for Markham projects so everything passes inspection and is fully code-compliant — you never have to chase paperwork with the municipality.
Markham neighbourhoods we serve
We build throughout Markham, including Unionville, Markham Village, Cornell, Berczy Village, Cathedraltown, Angus Glen, Wismer and Greensborough. Whatever the style, you get the same crew, the same standards and the same 2-year workmanship warranty on top of the manufacturer's material warranty. Browse recent builds in our project gallery, or view our full service-area list across the GTA.
Do you build decks in Markham?
Yes. Deck Master Inc. builds custom composite, cedar and pressure-treated decks throughout Markham and the surrounding York Region, with our own WSIB-insured crews.
How much does a deck cost in Markham?
Pressure-treated decks typically start around $30–$45 per square foot installed, and composite decks run about $45–$75 per square foot, depending on size, height and railings. We provide a free, detailed quote.
Do I need a permit to build a deck in Markham?
Most decks over 600 mm above grade or attached to the home require a building permit from the City of Markham and must meet zoning setbacks. We prepare the drawings and handle the permit for you.
What warranty do you offer?
Every deck includes a 2-year Deck Master workmanship warranty on top of the manufacturer's material warranty, which can be 25 years or more on composite boards.
Planning a deck in Markham?
Get a free, no-obligation quote from Markham's trusted, 5.0-rated deck builders.
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