Most decks take 1 to 3 weeks of on-site work, but the full project runs 3 to 8 weeks once you add design, permits, and inspections. That gap surprises most homeowners.
After more than a decade of deck building across this region, the pattern is clear: the hammering and drilling rarely cause delays. Planning, permit approval, and a short building season do. Spring works up fast here, so timing matters more than people think.
Read on to see exactly how long each stage takes, what slows things down, and when to start.
What Is the Average Time to Build a Deck
If you are budgeting your summer around a new deck, start with this: the average deck takes 1 to 3 weeks to build on-site. Size drives most of that range. A small platform goes up in a few days, while a large custom deck runs several weeks.
| Deck type | Square footage | On-site build time |
| Small deck | Under 200 sq ft | 1 to 2 weeks |
| Medium deck | 200 to 500 sq ft | 2 to 3 weeks |
| Large or custom deck | 500+ sq ft | 4 to 8 weeks |
Small Deck
A small deck suits compact yards and simple layouts. If your goal is a tidy spot for a barbecue and a couple of chairs, this is your range. Because the design stays basic, crews finish framing and boards quickly. With a single level and standard railings, the build takes roughly one to two weeks, and fewer footings mean faster progress.
Medium Deck
Most homeowners here choose a medium deck, since it fits the larger detached lots common across Newmarket and Aurora. For a deck this size, expect two to three weeks of work. The extra square footage adds framing, more footings, and longer railing runs.
Large or Custom Deck
A large or custom deck takes the most time. Picture multi-level layouts, wraparound shapes, or built-in seating, the kind of backyard that hosts the whole family.
Building an elevated deck above a walkout basement also calls for deeper footings and heavier posts. As a result, you should plan for four to eight weeks, sometimes more with premium features.
Read More: How to Clean a Wood Deck: The Newmarket Homeowner’s Guide
Step-by-Step Deck Building Timeline
| Stage | Typical duration |
| 1. Planning and design | 2 to 7 days |
| 2. Permits and approval | 3 days to 3 weeks |
| 3. Site preparation | 1 to 3 days |
| 4. Foundation and framing | 2 to 5 days |
| 5. Decking installation | 1 to 4 days |
| 6. Railings and stairs | 1 to 3 days |
| 7. Finishing touches | 1 to 2 days |
1. Planning and Design (2–7 days)
This stage sets up the whole project. First, a builder measures the yard, confirms materials, and finalizes the layout. A simple rectangular design is drawn quickly. If you want a fully customized deck designed around your yard, however, expect more time to draw and approve the plans.
2. Permits and Approval (3 days – 3 weeks)
Here is the stage that catches most people off guard. The Town of Newmarket issues most deck permits in 10 to 20 business days when the drawings are complete.
During spring and summer, though, those queues run longer. A builder who prepares the full application and drawings keeps this stage moving, especially when the Region of York or a conservation authority also needs to sign off.
3. Site Preparation (1–3 days)
Site prep comes next, and it means clearing the area and marking footing locations. If an old deck stands in the way, tearing out and hauling away the existing structure adds a day or two before the new build starts.
4. Foundation and Framing (2–5 days)
Footings come first, and in this region they must sit below the frost line, about 1.2 metres deep. Skip that depth and your deck will heave when the ground freezes, so it matters. Because of the depth, a footing inspection happens before any concrete is poured. Once it passes, the crew sets posts, beams, and joists in two to five days.
5. Decking Installation (1–4 days)
With framing approved, the boards go down. This is the part you have been waiting for, when the deck finally looks like a deck. Straight runs install quickly, while diagonal patterns and composite fastening systems take longer. Either way, this stage gives your deck its finished surface.
6. Railings and Stairs (1–3 days)
Railings and stairs follow the deck surface. Both must meet Ontario Building Code rules for height and spacing, which is non-negotiable on any deck above 0.6 metres. Adding custom railings and built-in benches around the perimeter stretches this window by a day or two.
7. Finishing Touches (1–2 days)
Finishing touches come last. At this point, many homeowners add low-voltage deck lighting, along with trim and a full cleanup. A final inspection then confirms the deck meets code, and after that, the deck is ready for use.
Read More: Composite Decking Installation: How-to, Costs & Pro-tips
What Affects How Long It Takes to Build a Deck?
Several factors decide your real timeline. Some you control, like materials and design, while others, like weather and permit queues, you cannot.
Knowing each one helps you set honest expectations from the start.
Deck Size and Layout Complexity
Bigger decks need more footings, framing, and labour. A simple rectangle goes up quickly, but a multi-level deck layout that steps down toward the yard adds cuts and coordination. In the end, complexity, not just size, decides your timeline.
Type of Materials Used
Your material choice changes both build speed and lead time. Some boards are stocked locally and install right away, while others need ordering ahead, especially in peak season.
i) Wood Decking
Homeowners across the area lean toward pressure-treated wood boards for good reason. The material is affordable, and it is often ready to install on delivery. As a result, wood decks rank among the faster options to build.
ii) Composite Decking
If you would rather not stain a deck every season, low-maintenance composite boards are worth the small trade-off, since they add a day or so to installation. The material needs special fasteners and matching trim, and lead times can stretch in summer. Still, the years of easy upkeep win many local homeowners over.
Weather Conditions
Rain, snow, and frozen ground all stall work. Footings cannot go into frozen soil, and spring rain often pauses framing. The region’s freeze-thaw climate shapes the schedule more than almost any other factor, which is why the building season here is short.
Permit Approval Process
Permit timing is the biggest hidden delay. A complete, code-compliant application clears faster, while missing drawings or setback issues add weeks. Local setback and lot-coverage rules trip up many DIY applications, so experienced builders handle the paperwork.
Site Preparation Requirements
Site prep varies by yard. A flat, clear lot is ready in a day, whereas slopes, poor drainage, and obstacles add days before framing starts.
i) Leveling the Ground
Uneven ground needs grading first, and sloped yards or walkout basements complicate the footings. On the clay-heavy lots common in York Region, water tends to pool, so a waterproof system that keeps the space under the deck dry pairs well with the build. That prep also guards against future shifting from frost heave.
ii) Removing Old Structures
Replacing a deck adds a teardown step before anything new goes up. Hauling away the old boards and footings takes time, so budget a day or two for removal before the new build begins.
Read More: Deck Stain vs Deck Paint: Pros, Cons & Best Uses
DIY vs Professional Deck Building Time
A DIY deck project often takes several weekends or even months because each step—setting footings, framing, cutting, and assembly takes longer without professional experience. Mistakes also lead to rework, which further delays completion.
Permits and building code requirements can add extra time, especially in regions with strict regulations like Ontario.
In contrast, professional contractors complete similar decks in just a few days to a week, thanks to experience, proper tools, and efficient project management.
Fastest Ways to Build a Deck
Want your deck done sooner? A few smart moves cut weeks off the timeline. Most delays trace back to late decisions and incomplete paperwork. Plan early, and each stage moves without waiting.
- Book your builder months ahead, since spring fills fast.
- Finalize your design and materials before applying for permits.
- Choose in-stock boards to skip long material lead times.
- Submit complete, code-compliant drawings the first time.
- Pick a simple rectangular layout over multi-level designs.
- Schedule footing and final inspections promptly.
- Hire a local crew that knows the Town’s permit process.
- Clear the work area before the team arrives.
Common Delays in Deck Construction
Even good projects hit snags, and it helps to know them before they surprise you. Spotting these early lets you build in a buffer instead of scrambling later. These are the delays that show up most often across the region.
- Permit queues that stretch during peak spring demand.
- Rain, snow, or frozen ground pausing footing work.
- Material backorders on composite boards in summer.
- Failed or rescheduled footing inspections.
- Mid-project design changes, known as change orders.
- Sloped or poorly drained yards needing extra prep.
- Hidden issues found after removing an old deck.
- Booked-out contractors with multi-week wait times.
When Is the Best Time to Build a Deck?
If you are wondering when to call a builder, here is the honest answer: the best time to build a deck here is late spring through fall. Fall, in particular, is underrated. Cooler temperatures, workable ground, and fewer rain delays make it ideal, and pouring footings before frost sets you up for an early finish.
If you want to use the space in cooler months, a roofed deck that shelters you from rain and sun extends your outdoor season well past summer.
Winter frozen ground stalls digging, while spring brings the longest permit queues and the most booked-out crews. For that reason, the best dates fill months in advance.
| Season | Build conditions | Permit wait |
| Spring | Good, but busy and rainy | Longest |
| Summer | Strong, some material delays | Moderate |
| Fall | Excellent, workable ground | Shortest |
| Winter | Poor, frozen ground | Low demand |
Conclusion
So, how long does it take to build a deck? Plan for 1 to 3 weeks of building and 3 to 8 weeks total, permits included. The smart move is simple: book early and start the design before spring, because that beats the permit rush and secures your preferred build dates.
If you are ready to enjoy your backyard this season, book a free on-site consultation with the deck builders serving Newmarket and York Region at XP Decking.
Frequently Asked Questions
Do I need a permit to build a deck in Newmarket?
Yes, for decks over 10 square metres, attached to your home, or above 0.6 metres. The Town confirms the thresholds.
How much does it cost to build a deck in Ontario?
Most installed decks run $45 to $95 per square foot in 2026. Material, size, and height drive the final price.
How long does a deck permit take to get approved?
The Town typically issues deck permits in 10 to 20 business days. Spring and summer applications can take longer.
How deep do deck footings need to go in Ontario?
Footings must sit below the frost line, roughly 1.2 metres deep. This prevents frost heave from shifting your deck.
How long does it take to build a second-story deck?
An elevated or second-story deck usually takes two to three weeks of build time. Deeper footings and taller posts add the extra days.
