We are a trusted deck builder in Toronto, Richmond Hill, Markham, and other nearby areas.
Building a deck in your Markham backyard isn’t as simple as grabbing some lumber and firing up the saw. After years of working on deck projects around the GTA, we’ve noticed homeowners are often caught off guard by all the different things that affect the final price.
In 2025, Markham homeowners should expect to budget between $35-75 per square foot for a professionally built deck, with material choice being the single largest cost driver. A typical 12×16 foot deck will run anywhere from $6,700 to $14,400 depending on your material selections, design complexity, and site conditions. We’ve built everything from basic pressure-treated lumber decks to elaborate multi-level composite structures, and the price difference often comes down to understanding what really matters for your specific situation.
If you know what drives deck costs, you can actually control your budget. Whether your dream is a cozy backyard spot or a big outdoor hangout zone, knowing the main pricing factors helps you make better decisions and sidestep those unpleasant surprises mid-project.
Key Takeaways
- Material choice will have the biggest impact on your deck’s price, from budget pressure-treated lumber to high-end composite
- Site quirks, design details, and custom features can push your construction costs higher
- Experienced contractors will handle permits, quality work, and help protect your investment for the long haul
Understanding Deck Building Cost in Markham
Markham’s regulations, local pricing, and the competitive contractor scene make for some unique deck-building math. Most homeowners end up spending between $25-$80 per square foot, depending on what materials and design they go with.
What Makes Markham Unique for Deck Projects
Markham’s permit process is smoother than in a lot of GTA cities, saving you time and, honestly, some headaches. The city asks for permits if your deck’s over 24 inches high or attached to your home, and fees usually run $150-$300.
Thanks to the city’s mix of neighbourhoods, we often deal with smaller backyards. That means we design a lot of multi-level or raised decks to squeeze out every bit of usable space.
And there’s a real focus on curb appeal here. Many neighbourhoods have unofficial standards that nudge people toward premium finishes or composite materials.
Markham’s clay-heavy soil can complicate things, too. We often need special footing techniques, and we always factor that into our estimates.
Typical Price Ranges for New Decks
Here’s what we usually see for deck projects in Markham:
Material Costs per Square Foot:
- Pressure-treated wood: $25-$35
- Cedar: $40-$60
- Composite: $60-$80
A standard 12×16 foot deck runs between $4,800-$15,360 depending on materials. Most of our clients spend around $8,000-$12,000 for a quality cedar or entry-level composite deck.
Common Add-ons:
- Custom railings: $25-$50 per linear foot
- Built-in seating: $150-$300 per linear foot
- Lighting: $250-$500 per fixture
We see a lot of Markham homeowners adding built-in planters or privacy screens, which tack on $1,000-$3,000 more.
Comparing Costs to Other Ontario Cities
Markham usually lands in the middle for GTA deck prices. We’re about 10-15% higher than places like Oshawa or Barrie, but 15-20% lower than downtown Toronto.
Regional Comparison:
- Toronto: $30-$90 per sq ft
- Markham: $25-$80 per sq ft
- Mississauga: $28-$75 per sq ft
- Ottawa: $22-$70 per sq ft
Labour costs in Markham stay reasonable thanks to a good pool of skilled tradespeople, and you avoid the Toronto core premium.
Material delivery is also pretty smooth here, thanks to the highways. That keeps your overall project costs in check compared to more remote spots.
Major Factors Affecting the Price of a New Deck
The price of your new deck in Markham boils down to four things: deck size, design complexity, material choice, and labour. If you get a handle on these, you’ll spend smarter and get a deck that fits your needs.
Deck Size and Square Footage
Size is the simplest cost driver. In Markham, we see costs from $35-75 per square foot, depending on what you pick.
A 200-square-foot deck will obviously cost less than a 400-square-foot one. But, interestingly, bigger decks often give you better value per square foot since you save a bit on materials and labour at scale.
Common deck sizes and approximate costs:
- 10×12 feet (120 sq ft): $4,200-$9,000
- 12×16 feet (192 sq ft): $6,700-$14,400
- 16×20 feet (320 sq ft): $11,200-$24,000
Most Markham homeowners seem to prefer decks in the 200-350 square foot range. That’s enough space for entertaining, but not so big it swallows your yard.
Oddly shaped lots or tricky access can bump up delivery costs. We always look at these details before quoting, so you don’t get hit with unexpected fees.
Design Complexity and Features
Simple rectangular decks cost less than fancy multi-level ones. We price basic, single-level decks at the low end, while anything with curves or multiple levels costs more.
Built-in features can really affect your budget. For example, benches add $1,500-$3,000. Pergolas or shade structures usually run $2,000-$6,000, depending on size and material.
Popular features and typical costs:
- Built-in lighting: $500-$2,000
- Custom railings: $80-$250 per linear foot
- Privacy screens: $1,000-$3,500
- Integrated planters: $800-$2,500
Second-story or elevated decks need more structural support. These projects usually cost 30-50% more than ground-level decks because of the extra work.
Sometimes it makes sense to build in phases. Start with the main deck, then add features later to spread out the cost.
Material Choices: Pressure-Treated, Cedar, and Composite
Material choice is the biggest wild card in deck pricing. Pressure-treated lumber is the budget pick at $15-25 per square foot installed.
Cedar looks great and resists bugs, for $25-40 per square foot. It takes some upkeep, but with care, it’ll last a long time in Markham’s climate.
Composite decking is $40-60 per square foot. It costs more upfront, but you skip the maintenance headaches. We suggest composite for people who want low-hassle decks and don’t mind paying extra at the start.
| Material | Cost per Sq Ft | Lifespan | Annual Maintenance |
|---|---|---|---|
| Pressure-Treated | $15-25 | 15-20 years | High |
| Cedar | $25-40 | 20-25 years | Moderate |
| Composite | $40-60 | 25+ years | Minimal |
PVC decking sits at the top, $50-70 per square foot. Pricey, but it’s tough and basically maintenance-free.
Labour and Installation Expertise
Professional installation usually makes up 50-60% of your total cost. In Markham, skilled deck builders charge $35-75 per hour, depending on the job.
Simple decks can be done in 2-3 days. If you want something complex or have a tough site, expect 1-2 weeks, and the labour bill climbs.
We always suggest getting a few detailed quotes. Make sure each one spells out crew size, timelines, and warranty terms so you’re comparing apples to apples.
Permits and inspections usually add $200-600. Experienced contractors handle these quickly and can save you from expensive delays.
Site prep can really swing the labour costs. Flat, easy-access properties are quick. Sloped or tight-access lots can bump labour up by 20-30%.
Other Key Cost Considerations
Besides materials and labour, there are a few extra expenses that can sneak up on you. Permits, site prep, and assorted fees often add $1,000-$3,000 to your total.
Permits and Regulatory Requirements
Markham wants permits for most decks, especially if they’re attached to the house or over 600mm (24 inches) high. We usually budget $400-$800 for permits, depending on size and complexity.
You’ll need to submit structural drawings and site plans. The building department wants to see footing depths, beam sizes, and how you’ll attach the deck to your house.
Permits take about 3-4 weeks once your paperwork’s in. Start early so you’re not stuck waiting.
Key permit requirements:
- Structural drawings with all dimensions
- Site plan showing setbacks
- Footing details below frost line (1.2m minimum in Markham)
- Railing specs for elevated decks
If you fail an inspection, you’ll pay $100-$200 for a re-inspection. Contractors who know Markham’s system can help you avoid these delays.
Site Preparation and Accessibility
Markham properties vary a lot, and site conditions can really change your costs. Flat, open yards are easy. Sloped or rocky lots can add $2,000-$5,000.
Sloped yards often need extra supports or grading. Rocky soil, which pops up in some neighbourhoods, means more expensive excavation—sometimes 20-30% higher.
Accessibility factors:
- Narrow side yards limiting equipment
- Landscaping that needs protecting or removing
- Underground utilities that slow down digging
- Long distance from street to site
If you need to get rid of an old deck, demolition is $10-$15 per square foot. Concrete removal is $12-$18 per square foot.
We always do a thorough site check before giving a final quote. That way, you know what you’re in for.
Taxes and Additional Fees
HST adds 13% to everything—materials and labour. On a $15,000 deck, that’s another $1,950.
Some contractors roll HST into their quotes, others add it at the end. Always ask, so you’re not caught off guard.
Other fees to watch for:
- Waste disposal: $300-$600, depending on project size
- Temporary fencing for elevated decks: $200-$400
- Utility marking: $100-$200
- Final inspection: $150-$250
Sometimes, insurance costs go up if your contractor needs extra coverage for a tricky job. Premium materials might have delivery surcharges of $200-$500 in Markham.
We always break down all costs, taxes, and fees in our quotes so you know exactly what you’re paying for.
Choosing the Right Materials for Your Deck
Material choice shapes both your upfront spend and your future maintenance in Markham’s climate. Pressure-treated lumber is easy on the wallet but needs regular TLC. Cedar looks beautiful and holds up well with some care. Composites cost more at first but save you time on upkeep.
Pressure-Treated Lumber Pros and Cons
Pressure-treated lumber is still the cheapest option for Markham homeowners in 2025, usually $15-25 per square foot installed. Lots of clients go for this when the budget’s tight or they want a bigger deck for less.
The treatment keeps rot and bugs at bay, but you’ll need to stay on top of maintenance if you want it to last.
Pros:
- Lowest initial price
- Easy to find at local stores
- Good strength for structure
- 15-20 year lifespan if you look after it
Cons:
- Needs cleaning every year and staining every 2-3 years
- Prone to warping or cracking
- Limited colour options
- Contains chemicals some people aren’t thrilled about
We usually suggest pressure-treated for folks who don’t mind regular upkeep and want to get the most deck for their dollar.
Natural Wood Options: Cedar and More
Cedar is hands-down our most popular natural wood in Markham, coming in at $25-40 per square foot installed. Its natural oils help it handle Ontario’s wild weather.
We’ve built a ton of cedar decks and they age nicely. Left alone, cedar fades to a silvery grey, or you can keep the warm colour with annual UV protection.
Cedar perks:
- Naturally resists bugs and rot
- Beautiful grain and colour
- Handles temperature swings
- 20-25 year lifespan with some maintenance
You can also choose redwood or exotic hardwoods like ipe. Redwood is a bit pricier than cedar due to shipping. Exotic woods last even longer but need special installation and cost $35-55 per square foot.
Regular cleaning and sealing every couple of years keeps natural wood looking sharp and lasting longer.
Composite and PVC Decking Advantages
Composite and PVC materials have really caught on with our Markham clients who want to skip the endless maintenance. Sure, these decks cost $40-65 per square foot installed, but you can forget about that yearly staining and sealing routine.
Modern composites mix recycled plastic with wood fibres, so you get those nice wood-grain looks without the splinters. PVC decking, on the other hand, is about as tough and stain-resistant as it gets.
Key advantages:
- Maintenance is basically just the occasional wash
- No warping, cracking, or splinters to worry about
- Colours stay true, thanks to fade-resistant tech
- Warranties usually run 25-30 years
You pay more upfront, but it evens out. For example, a 200-square-foot pressure-treated deck might be $5,000 at first, plus $3,000 in upkeep over 20 years. A composite deck at $10,000? You’ll spend just a few hundred bucks on cleaning supplies over the same period.
We usually suggest composites for folks who’d rather relax outside than spend weekends sanding and staining. There’s a surprising range of colours and textures these days, so you don’t have to give up style for convenience.
Custom Deck Designs and Upgrades
Custom features and unique architectural touches can swing your deck’s final price a lot. Upgrades might be as simple as adding a covered spot or as involved as building a multi-level hangout. Fancy railings, built-in lights, and amenities can really boost your deck’s value, but they need some careful budgeting.
Covered Decks and Pergolas
Adding a roof or pergola turns your deck into a real outdoor room. We usually see costs jump $15-25 per square foot for basic covered setups.
A simple pergola? Expect $2,000-4,000 for a standard size. Want a full roof with drainage and extra support? That’s more like $8,000-15,000, depending on what you pick.
Popular covering options:
- Louvered pergolas with adjustable slats
- Solid roof systems (with gutters)
- Retractable canopies
- Lattice-style overheads
Weather protection is a big deal. Covered decks let you use the space longer and keep your furniture from taking a beating.
Covered decks need sturdier foundations. We always factor in snow loads and wind resistance when we design these.
Multi-Tiered and Sloped-Yard Decks
If your yard’s sloped or you want multiple levels, get ready for higher construction costs. Multi-level decks usually cost 40-60% more than a flat deck because of extra framing and stairs.
Sloped yard challenges:
- Taller posts and extra bracing
- Custom stairs to connect levels
- Specialized foundations on uneven ground
- More permits and engineering
Two-story decks with upper and lower access run $45-75 per square foot. Connecting multiple levels safely takes real experience and solid materials.
Raised platform decks, 2-4 feet above ground, give you some elevation without breaking the bank. They’re a nice compromise between accessibility and style.
For big, multi-tiered projects, we sometimes suggest building in phases. That way, you can spread out the costs and still make sure everything fits together in the end.
Railings, Lighting, and Built-In Features
Premium upgrades can double your basic deck costs fast. Custom railings alone run $25-50 per linear foot over standard options.
High-impact upgrade costs:
| Feature | Price Range |
|---|---|
| Custom railings | $25-50/linear foot |
| LED lighting systems | $250-500/fixture |
| Built-in seating | $150-300/linear foot |
| Outdoor kitchens | $5,000-10,000+ |
Integrated lighting makes your deck look incredible at night. We always plan for electrical rough-ins at the start to avoid expensive retrofits.
Built-in planters, storage benches, and custom railings all add function, but they need careful planning and skilled carpentry.
Pro tip: If you want upgrades, bundle them in from the beginning. It’s easier and cheaper to add features during the main build than to tack them on later.
How Professional Deck Contractors Influence Cost
Who you hire can make or break your deck budget in Markham. Contractors bring different levels of skill, openness, and service, and that all shows up in the final price—and what you get for it.
Expertise and Workmanship
Experienced deck contractors in Markham usually charge 15-25% more than general handymen. Honestly, that premium often saves you money in the long run. We’ve cleaned up too many DIY messes and rookie mistakes that end up costing homeowners thousands.
Good contractors know Markham’s building codes and how our climate beats up decks. They’ll use the right fasteners that won’t rust out in winter and flash ledger boards properly to keep water out.
Quality workmanship affects costs by:
- Doing solid foundation work to prevent settling
- Taking accurate measurements to avoid wasting materials
- Building to code, so you pass inspections first time
- Using pro tools to get the job done faster
Licensed contractors carry insurance, which protects you if something goes wrong. Sure, insurance is built into their rates, but it’s way cheaper than dealing with lawsuits if someone gets hurt on an uninsured site.
Transparent Estimates and Pricing
The best Markham deck contractors give you written estimates that break down every cost: materials, labour—the works. We always spell out exactly what we’re using, right down to the grade of lumber and type of fasteners.
Watch out for contractors who only give verbal quotes or vague numbers. That’s often a red flag for surprise charges later. Real pros itemize everything, including permits and waste removal.
A good estimate covers:
- Material specs and amounts
- Labour hours and crew size
- Permit and inspection fees
- Timelines, with notes about weather delays
We usually offer three price points: basic, standard, and premium. That way, you can see how your choices affect your budget without feeling pushed into extras you don’t need.
Customer Service and Project Management
Solid project management keeps your deck project on track and on budget. We handle scheduling, coordinate material deliveries, and keep you in the loop to avoid last-minute surprises.
Bad communication leads to expensive headaches. If your contractor ghosts you or makes decisions without asking, you could end up with changes you never agreed to—and a bigger bill.
Professional project management means:
- Regular updates and photos
- Heads-up about any weather delays
- Timely material delivery
- A final walkthrough and clear warranty info
We take care of permits and inspections, too. It’s part of our price, but it saves you hassle and ensures your deck meets Markham’s rules.
Frequently Asked Questions
Markham homeowners ask us all the time about deck costs, labour rates, and where budgets can go off the rails. Here’s what we’re seeing for 2025 and what we’ve learned building decks around the GTA.
How much does labour typically cost for building a deck per square foot in Ontario?
Labour in Ontario runs $20-$35 per square foot in 2025. That’s up about 8% from last year, thanks to a province-wide shortage of skilled trades.
Markham and the rest of the GTA are at the higher end. Rural spots usually see $20-$25 per square foot.
More complex decks—with multiple levels or custom features—cost more for labour. Simple rectangles are the cheapest.
We charge $45-$65 per hour for our crew. Most jobs need 2-3 skilled workers to keep things moving.
Can you provide a rough estimate for the cost of materials needed to build a deck per square foot?
Material costs really depend on what you pick. Pressure-treated lumber is $8-$12 per square foot for materials in 2025.
Cedar decking is $15-$22 per square foot, including boards, fasteners, and basic railings.
Composite materials go from $18-$28 per square foot. Top brands with long warranties sit at the higher end.
Don’t forget the structure—posts, beams, and joists usually add $3-$5 per square foot.
Could you break down the main factors that affect the overall cost of building a new deck in Markham?
Size is the biggest factor. Bigger decks cost more, but the price per square foot often drops as you go larger.
What you build with matters a lot. Switching from pressure-treated to composite can double your material spend.
Design complexity adds a chunk, too. Multi-levels, built-in seats, and custom railings all push up both material and labour costs.
Site conditions can throw a wrench in things. Slopes, tough access, or rocky soil can tack on $2,000-$5,000 in prep work.
What are some hidden costs I should watch out for when planning my deck construction budget?
Permits in Markham run $200-$500, depending on what you’re building. We handle permits for most clients, but it’s still a line item.
Site prep can surprise people. Tearing out old decks, dealing with buried utilities, or fixing drainage can add thousands.
Sometimes, your house needs extra support for the deck. If that’s the case, expect $1,500-$3,500 more.
Finishes add up, too. Staining, lighting, and decorative extras can easily bump your total by 15-20%.
Is there an average cost per square foot I should expect when calculating my deck construction in Toronto?
In Toronto, decks average $45-$75 per square foot for materials and labour in 2025. Labour and delivery cost more in the city.
Basic pressure-treated decks start at $35-$45 per square foot. If you want premium composite or exotic hardwood, you could pay $80-$100 per square foot.
These numbers assume a standard rectangular deck with basic railings. Add-ons like pergolas, planters, or multiple levels will push the price up.
If you’re planning custom features, budget at the higher end. It’s better to have a cushion than to get caught short.
For a typical 14×20 deck, what would be the expected price range for construction?
A 280-square-foot deck usually runs between $12,000 and $21,000 in Markham, depending on your choice of materials and any extras you add. That’s a pretty solid deal for some comfortable outdoor living space, if you ask me.
If you go with pressure-treated lumber, you’re probably looking at $12,000 to $15,000. Cedar costs a bit more—expect somewhere between $16,000 and $19,000 for a deck this size.
Composite decking bumps the price up to $19,000–$25,000, but you get decades of low-maintenance use out of it. Honestly, the reduced upkeep can make the higher upfront cost feel worth it.
Want extras like built-in benches, a pergola, or fancy railings? Plan to tack on another $3,000 to $6,000. Those upgrades really take a simple deck and turn it into more of an outdoor room.