We are a trusted deck builder in Toronto, Richmond Hill, Markham, and other nearby areas.
Building a new deck is an exciting way to turn your backyard into a space you’ll actually use. Still, picking the right deck builder in Markham isn’t as simple as calling the first name you find online. Before you hire anyone, double-check their licensing and insurance, look at their past work, talk to a few of their previous clients, and make sure they’re up to speed on Markham’s building codes and permits. Taking the time to vet your contractor saves you headaches, money, and endless frustration down the road.
After years in the deck building world, we’ve seen the full range—from stunning backyard retreats to jobs that barely passed inspection. More often than not, it comes down to how carefully the homeowner chose their builder. Chasing the lowest bid? That’s a recipe for shoddy work, missed deadlines, and surprise costs. The questions you ask early on reveal whether a builder’s really got the skills and attitude you want.
Let’s walk through the key things to check before you sign anything. We’ll talk credentials, materials, and what to ask, so you can actually enjoy your new deck instead of worrying about it.
Key Takeaways
- Make sure your deck builder has valid licensing, insurance, and understands Markham’s building codes and permits.
- Look at their past projects and talk to local clients to judge their quality, communication, and reliability.
- Insist on a written contract with all the details—materials, timeline, payment terms, and warranty—before work starts.
Defining Your Project Goals And Needs
Before reaching out to any deck builder, get clear on what you want. If you don’t know your goals and budget, you’ll end up with vague quotes and mismatched expectations.
Purpose And Function Of Your Deck
How do you picture using your deck? Is it for big family BBQs, or just a place to read in the sun? Entertainers need space for tables and a grill. If you’ve got young kids, maybe you want open play space instead of built-in benches.
The way you use your deck shapes its size and layout. Planning for a hot tub? You’ll need stronger framing and special engineering. Want to use the space in spring and fall? Think about adding a pergola or some shelter for shade and rain.
Location’s a big deal too. A deck off the kitchen is perfect for serving food, but a deck off the bedroom feels more like a private escape. We’ve even built decks that double as front entries—totally different requirements.
Essential Features And Upgrades
Start by listing what’s non-negotiable versus what’s just nice to have. Built-in benches look sleek and save space, but they aren’t cheap. If you’ll use the deck at night, lighting isn’t optional. Low-voltage LEDs on stairs and railings are safer and add a nice vibe.
Think about these upgrades:
- Privacy screens or lattice to block neighbours’ views
- Composite decking for less upkeep
- Multi-level layouts for separate zones
- Built-in planters if you want greenery but limited space
Some features—like hot tubs or gas lines—have to be planned from the start. Adding them later is expensive and messy.
Setting Your Budget Range
In Markham, decks usually run $35–$75 per square foot, depending on materials and design. A basic 12×16 ft pressure-treated wood deck might cost $8,000–$12,000. Add composite boards and built-ins, and you could be looking at $18,000–$25,000.
Don’t just set a hard ceiling—give yourself a range and pad it by 10–15% for surprises like bad soil or new code rules. If your budget is $15,000, tell builders you’re thinking $15,000–$17,000.
Remember the long-term costs too. Composite decking costs more upfront but saves you hundreds on staining and sealing every year. Wood decks need maintenance every year or two. It adds up.
Evaluating Experience And Local Expertise
A deck builder’s experience—especially in Markham—can make or break your project. Local know-how matters, since building codes, permits, and even the weather can vary a lot from town to town.
Proven Track Record In Markham
Stick with contractors who’ve done plenty of work in Markham. Locals know the ins and outs of our city’s codes and the maze of the Civic Centre’s permit process.
They also get how Markham’s freeze-thaw cycles and humid summers affect decks. Builders who’ve worked here know which materials last and how to build for our tough winters.
Ask how many Markham decks they’ve built in the last couple of years. The builders people trust around here usually have at least 20 local jobs under their belt. They should know the inspection drill and have good relationships with city inspectors.
Portfolio And References
Ask for photos of decks they’ve built around Markham. Check the railings, how straight the boards are, and the little finishing details. Builders who take pride in their work love showing it off.
Get at least three references from recent local clients. When you call, ask about communication, timelines, and how the builder handled any hiccups. If you can, drive by a finished project or two (with the homeowner’s okay).
Check out online reviews on Google or HomeStars from Markham residents. See if the builder responds thoughtfully to both good and bad feedback.
Credentials, Licensing, And Insurance Requirements
Before you sign anything, make sure your deck builder has the right paperwork and insurance. These aren’t just boxes to tick—they protect you if something goes sideways and help ensure the work meets Ontario standards.
Verifying Licences And Certifications
In Ontario, deck building is considered carpentry, but it’s not a compulsory trade. So, technically, contractors don’t need a Certificate of Qualification. Still, it’s smart to check if they’re registered with the Ontario College of Trades as a voluntary member.
Ask for proof of certifications or apprenticeships. A builder who’s invested in their training usually cares about quality. You can check their status on the Ontario College of Trades’ website.
Some towns require extra business licences. Contact Markham’s building department to see what’s needed. If the builder will do electrical work—like lighting—they need a proper electrical contractor’s licence from the Electrical Safety Authority.
Always see their credentials before signing. Pros won’t hesitate to show you.
Importance Of Proper Insurance Coverage
Your contractor needs both liability insurance and Workplace Safety and Insurance Board (WSIB) coverage. Liability insurance protects you if someone’s hurt on your property or if there’s damage during the build.
Ask for a certificate showing at least $2 million in liability coverage. Call the insurer to make sure it’s legit and current.
WSIB coverage means you’re not on the hook if a worker gets injured. No WSIB? You could be stuck with their medical bills. Ask for a clearance certificate and double-check it on the WSIB website.
If a contractor can’t prove insurance, walk away. Saving a few bucks isn’t worth the risk.
Material Selection And Recommendations
The materials you pick for your Markham deck will decide how it stands up to our winters and muggy summers. A good builder should talk you through options that fit your budget and explain how each one handles our wild weather.
Composite Decking Options
Composite decking blends recycled wood fibers and plastics, making boards that don’t rot, splinter, or attract bugs. In our climate, composites hold up better than plain wood—less warping, fewer headaches.
Most composite decks cost $30–$45 per square foot installed. Boards with a protective cap resist fading and stains better than uncapped ones.
Ask your builder about the differences between brands like Trex, TimberTech, and Fiberon. Each has its own warranty, colors, and feel. Some get hot in direct sun, so ask if that’s a concern for your space.
Experienced builders know how to install composite decks so they won’t warp or buckle as temperatures swing.
Pressure-Treated Lumber Choices
Pressure-treated lumber is the most affordable, usually $15–$25 per square foot installed. The wood’s treated with preservatives to fight rot and bugs. Modern treatments are safer than the old stuff, but the wood comes wet and needs months to dry before you stain it.
Expect to clean and reseal pressure-treated decks every couple of years. Skip the maintenance, and you’ll get cracks, warping, or even mold—especially with our humidity.
Make sure your builder uses the right grade: ground-contact for anything near soil, above-ground for raised sections.
Comparing Material Lifespans
| Material Type | Expected Lifespan | Maintenance Level | Warranty Period |
|---|---|---|---|
| Pressure-Treated Lumber | 15-20 years | High (annual care) | 5-10 years |
| Composite Decking | 25-30 years | Low (periodic cleaning) | 25-50 years |
| Cedar | 15-20 years | Medium (biennial care) | Limited/None |
| PVC Decking | 30+ years | Very Low | 25-50 years |
Composites last longer and need way less work than pressure-treated wood. Sure, they cost more at first, but you save on maintenance in the long run.
A good builder will show you real samples—ideally ones that have aged outdoors in Markham. You’ll see how colors fade and surfaces wear. We always look at the lifetime cost, not just the sticker price.
Understanding Local Building Codes And Permits
Building a deck in Markham comes with its own set of rules and red tape. The City’s Building Standards department enforces codes and handles permits to make sure your deck is sturdy and safe.
Markham Permit Process
Before you start, call Markham’s Building Standards department at 905-475-4850. They follow Ontario’s Building Code and issue permits for decks.
You’ll need detailed plans showing your deck’s design, materials, and how it connects to your house. Most builders handle the paperwork, but stay involved so you know what’s being submitted.
The city offers Builder Tips covering construction basics. Builders should know these inside out—especially stuff about support, fasteners, and weatherproofing.
Permits usually mean several inspections as the work progresses. We’ve seen jobs grind to a halt when builders skip permits, so make sure your quote includes permit fees and timelines.
Ensuring Code Compliance
Your deck must meet Ontario Building Code standards for strength, safety rails, and load limits. Markham inspectors check compliance at every stage.
Codes specify footing depth, beam size, joist spacing, and fastener types. These rules change based on your deck’s height and size. For example, decks over 600mm above ground need guards, and guard openings can’t let a 100mm ball through.
Ask builders about their experience with Markham codes. We always pull permits—skipping them is risky and a big red flag.
Reviewing Contracts And Payment Terms
A good contract protects both you and your builder. It should lay out exactly what’s being built, when you pay, and how changes are handled. The details here matter just as much as the materials or the crew’s skill.
Key Elements In A Deck Contract
Any solid deck contract should spell out who’s involved, the full address, and—most importantly—what’s actually being built. Don’t settle for vague descriptions. The contract needs to list the deck’s size, which materials (brand and grade, not just “composite”), railing style, stair setup, and any extras like built-in benches or lighting. If it’s not written down, it’s not included.
You’ll want a clear timeline with start and finish dates. Make sure it’s obvious who’s handling permits and paying for inspections. Your contractor should carry WSIB coverage and liability insurance—ask to see proof, don’t just take their word for it.
Look for details about site cleanup, debris removal, and how your property will be protected. The contract should also spell out what happens if weather slows things down or materials are delayed. If these points are missing, you’ll be left guessing who’s responsible when things go sideways.
Payment Schedules And Protections
Most deck builders ask for a deposit, then payments at key milestones. For example, you might pay 10-20% upfront for materials, 40% after framing, another 40% when decking and railings go in, then the last 10% after inspection and cleanup.
Don’t ever pay the whole amount before work starts. Reputable builders don’t need that—they have supplier accounts and working capital. If someone wants a huge payment upfront, that’s a warning sign.
The contract should lay out how you’ll pay (cheque, e-transfer, etc.) and include language about lien waivers. In Ontario, if your contractor doesn’t pay their suppliers or subs, those folks can put a lien on your property—even if you already paid the contractor. Protect yourself by requiring statutory declarations or lien waivers before handing over the final payment.
Managing Change Orders
Let’s be honest: changes happen. Maybe you want wider stairs, fancier decking, or extra lights. The contract should make it clear how you request changes and how those changes get approved.
A proper change order process means nothing extra happens until both sides sign off in writing. Each change order should say what’s changing, the new cost (or credit), and how it affects the schedule.
Skip verbal agreements about changes. Too many headaches come from “I thought that was included” or “I expected to get paid for that.” Written change orders keep everyone honest and avoid drama later.
Project Timeline, Communication, And Warranty
If you want your deck project to go smoothly, you need three things: a real timeline, good communication, and a decent warranty. Miss any of these, and you’re asking for trouble.
Establishing Start And Completion Dates
We always give specific start and finish dates in our proposals—not just “sometime in spring.” Most decks in Markham take 1-2 weeks, unless you’re after something really custom or complicated. Weather can mess with the schedule, but your contractor should keep you posted and update the timeline if things get delayed.
Ask builders about their current workload and when they can realistically start. If someone says they can begin tomorrow but others are booked for weeks, you might want to dig deeper into why. Get a timeline that breaks down the main phases—framing, decking, railings—so you know what’s happening each day.
Make sure the contract spells out these dates and explains what happens if the job runs late. Some builders offer compensation for big delays, others just aim to finish as soon as possible.
Warranty On Labour And Materials
Trex decking comes with a 25-year material warranty, but that won’t help if the installation is botched. We offer a separate labour warranty, usually 2-5 years, depending on the job. That covers stuff like loose railings, squeaky boards, or structural issues from bad installation.
Check that your contract spells out exactly what’s covered and for how long. Some contractors only cover major failures, others include cosmetic stuff too. Get it in writing before you sign.
Ask how warranty claims work. Will your builder come back quickly, or will you be stuck waiting? We suggest choosing builders who’ve been around at least five years—they’re more likely to stick around if issues crop up.
Clear Communication Practices
A good contractor gets back to you within a day, even if it’s just to say they’ll follow up soon. Watch how fast and clearly builders answer your questions during the quoting stage. If they’re slow now, it probably won’t get better once work starts.
Find out who your main contact will be during construction. Will you talk to the owner, or is there a project manager? We assign one person per project so you’re not chasing different people for answers.
Ask how often you’ll get updates. Weekly check-ins usually work, plus immediate calls if there’s a problem or change. Your builder should also explain the change-order process up front, so you’re not in the dark about how modifications get handled.
Frequently Asked Questions
If you’re building a deck in Markham, you probably have a bunch of questions—about materials, qualifications, and local rules. Here’s what we usually get asked, and what you should know before hiring anyone.
How can I verify the quality of materials a deck builder plans to use?
Ask your builder for detailed specs on the materials—brand names, product lines, all of it. We always give you samples and manufacturer docs so you can check out the warranties and ratings yourself.
Try to see the actual materials before they’re installed. That way, you’re not just relying on descriptions or stock photos.
Check if the materials have manufacturer warranties. Good composite decking usually has a 25-year warranty; premium pressure-treated lumber should have at least a 15-year guarantee against rot.
If you’re going with wood, ask about the grade. There’s a big difference between premium and standard, and some builders cut corners here.
We always suggest researching the products your builder recommends. Read independent reviews and see if the brands have a good rep in Canada.
What qualifications and experience should I look for in a deck building contractor?
Your builder needs a valid business licence for Markham and should carry liability insurance and workers’ comp. We’ll show you copies of these up front so you can double-check.
Look for at least five years of experience building decks in the GTA. Local experience matters—Markham has its own building codes and weather quirks.
Membership in groups like the Canadian Home Builders’ Association or North American Deck and Railing Association shows they care about quality and keeping up with building standards.
Ask if they’ve built the kind of deck you want. Someone who mostly does ground-level decks might not be the right fit for a tricky two-storey build with custom features.
Can you provide customer testimonials or a portfolio of your previous deck projects?
Any good builder should be happy to share photos of their work and give you contact info for recent clients. We keep a portfolio sorted by deck type, materials, and special features so you can see what’s possible.
Ask to see decks built a few years ago, not just the newest ones. That shows you how well the work holds up through a few tough winters.
Get references from jobs in Markham. Local projects prove they know the building codes you’ll need to meet.
Check Google and HomeStars reviews, but don’t obsess over the occasional bad one. Look for patterns in feedback.
If possible, visit completed decks in person. There’s no substitute for seeing the quality up close and talking to homeowners about their experience.
What’s the ballpark estimate for the cost of building a deck in the Markham area?
Basic pressure-treated wood decks in Markham usually run $15–$25 per square foot installed. That means a standard 12×16 deck would cost about $2,880 to $4,800, materials and labour included.
Cedar or premium wood decks cost more—$25–$35 per square foot. So, the same 12×16 deck would be $4,800 to $6,720.
Composite decking is pricier up front ($30–$45 per square foot), but needs less upkeep. Budget $5,760 to $8,640 for a 12×16 composite deck.
Add-ons like multi-levels, benches, pergolas, or fancy railings will bump up the price—sometimes by 20% to 50%, depending on how elaborate you go.
Permits in Markham are usually $200–$500, depending on deck size. Your builder should include permit costs in their quote, not spring them on you later.
How do deck builders ensure compliance with Markham’s building codes and regulations?
Good deck builders keep up with Markham’s codes by staying in touch with local inspectors and doing regular training. We check code requirements at the start of every project to make sure everything’s safe and legal.
Your builder should handle the permit application with the City of Markham, including submitting detailed plans that show structure, railing heights, setbacks, and all the rest.
Decks here have to meet Ontario Building Code standards for structural loads—think snow and crowds. We calculate these loads during design so you don’t end up with a saggy deck.
Inspections usually happen twice: once after the foundation and framing, and again when everything’s finished. Your builder should coordinate these and fix any issues the inspector finds.
Ask about setback rules for your lot. Markham has strict guidelines about how close decks can be to property lines, and ignoring them can mean expensive fixes later.
What kind of warranty or guarantee do you offer on your deck construction work?
We offer at least a two-year warranty on our workmanship. If anything goes wrong because of how we built or installed your deck, we’ll take care of it. This warranty doesn’t cover the materials themselves—that’s a separate deal.
Material warranties can be all over the map, honestly. With composite decking, you’re usually looking at 25 to 30 years of coverage for things like fading, stains, or structural issues. Pressure-treated lumber tends to come with about 15 years against rot or bugs.
Before we start, you’ll want all the warranty details in writing. The contract should spell out what’s covered, how long it lasts, and what you need to do if something goes sideways.
Curious about how we handle warranty claims? If you ever have an issue, just reach out—we usually respond within 48 hours and try to get repairs scheduled fast.
A heads-up: some manufacturers require you to do regular maintenance to keep your warranty valid. When we wrap up your project, we’ll give you care instructions so you know exactly how to look after your deck and keep that coverage intact.