How Much Does It Cost to Build a Deck in Ontario? (2026 Homeowner’s Guide)
- Cameron M
- Feb 10
- 8 min read
As a professional deck builder and business owner in the London area I'm often asked at project consultations “How much is this thing going to cost?”
If you’re thinking about adding a deck to your home and have questions about what to expect, this blog intends to bring clarity to those seemingly "wild" deck costs, straight from a pro.
Now, to answer the original question about the cost of building a deck, the short answer is... it depends. The long answer is what this guide is for. This blog will help you better understand real-world deck pricing in Southwestern Ontario, explain what factors influence cost, as well as, helping you budget confidently for a deck that fits your home, lifestyle, and long-term plans.
Why Deck Costs Vary So Much
Simply put every deck project is unique. A basic ground-level deck will be much cheaper than a multi-level composite deck with stairs, lights, and railings.
Here are the biggest factors that impact pricing on decks in Southwestern Ontario:
Size and layout of the deck
Height off the ground and number of stairs
Choice of materials (wood vs composite vs PVC)
Railing style and safety requirements
Digging conditions
Permit and inspection requirements
Add-ons like lighting, privacy screens, or built-in seating
All of these influence both material costs and labor time, which together determine the final price.
Average Deck Cost in London, Ontario (2026 Pricing Guide)
As a business, we find that quoting deck projects solely based on a "price per square foot" doesn't always capture the full picture due to so many factors at play. That being said, I’ve put together some general price ranges that homeowners in the London area can typically expect:
Basic Pressure Treated Wood Deck
$30-$50 per square foot
This is the best option for homeowners looking for a classic, budget-friendly outdoor space. Depending on the requirements for your project, features like railings, stairs, skirting etc. all play a major role in it's cost. So, the more specs needed, the more likely you are to find your price outside of this model.
Mid-Range Composite Deck
$55-$100 per square foot
Some lines of composite decking are priced lower, meaning you can get a low-maintenance, long-lasting deck, for less. However, this is where you begin to see some major price jumps. A similar project made from pressure treated wood could be half the price, simply due to the material costs being so different.
Premium PVC Deck
$70-$150+ per square foot
This is the "cream of the crop". You are getting high-end materials, advanced designs, and premium features. Similar to the mid-range composite deck, the major jump in price is mostly due to the material pricing. Often times when someone is interested in the "Premium PVC Deck" option, alternative framing or post foundation methods are used to fully take advantage of this material's long lifespan.
Depending on the specific details of your project these ranges can fluctuate quite a bit, so it's always a good idea to discuss your unique needs with your contractor for a more accurate estimate.
These estimates typically include materials, labor, and standard installation — but not custom features or major structural upgrades.
Wood vs Composite vs PVC — How Materials Affect Cost
Choosing the right decking material plays one of the biggest roles in your overall budget.
Pressure-Treated Wood Decks
This is the most cost-effective option and one of the most popular choices we see across Southwestern Ontario.
Pros:
Lower upfront cost
Natural appearance
Easy to repair or modify
Things to Consider:
Requires staining or sealing every 1–2 years to maintain it's appearance and lifespan
More susceptible to weathering and moisture
Composite Decking
Composite boards are made from a blend of wood fibres and plastic, designed to resist fading, rot, and insects.
Pros:
Low maintenance
Long lifespan
Consistent colour and finish
Things to Consider:
Higher upfront cost
Can feel warmer in direct sunlight
PVC Decking
PVC is a premium option made entirely from synthetic materials.
Pros:
Maximum moisture resistance
Extremely low maintenance
Great for shaded or damp areas
Things to Consider:
Generally highest material cost
More “modern” look compared to wood
In this blog I have "Composite" and "PVC" as two different price points. However... depending on the brand you go with, both PVC and composite decking products usually have a variety of product lines within that brand, each with options at different price points. So, although it's not always the case, for simplicity sake, I've highlighted composite as a cheaper alternative to PVC.
What Adds to the Cost of a Deck Build?
Many homeowners are surprised to learn that the deck boards aren’t always the most expensive part of the project. Here’s what can significantly affect pricing:
Deck Height & Stairs
Higher decks mean:
Deeper footings
Guardrails
Longer stairs
Obstacles by working off ladders or scaffolding
Potential permits requirements
All of these increase both labor and materials.
Railings
Basic railings like the wood with metal balusters (something that is very popular in this area) are affordable, but upgrading to:
Aluminum railings
Glass panels
Vinyl railings
can add a substantial amount to your total.
Permits & Code Compliance
In many cases, decks in London and Middlesex County require permits depending on height and attachment to the home. Professional builders will factor in:
Drawings
Inspections
Local bylaw compliance
This protects you and ensures your deck is built to be compliant with the Ontario Building Code.
Site Conditions
Sloped yards, rocky soil, or limited access can increase installation time and equipment needs.
Budgeting for a Deck in Ontario — Smart Planning Tips
If you’re setting a realistic budget, here’s how to avoid surprises:
1. Plan for Long-Term Value
Going for a cheaper deck now might mean more upkeep and fixes in the next 10–15 years. Composite and PVC decks might initially hit your wallet harder, but they can save you a lot of money in the long run.
Even though the initial cost of top-notch materials can seem steep, they usually last longer and handle the weather better, cutting down on how often you'll need to fix things. Plus, since composite and PVC decks need less maintenance, you can save a lot of time and effort over the deck's life.
2. Prioritize Structural Quality
Footings, framing, and fasteners matter just as much as surface boards, especially in Ontario’s freeze-thaw cycles. There's a number of products available for deck posts and framing.
The foundation is the most important part to your deck having a long, sturdy life. Wood posts dug and set with concrete are a popular and affordable option, but other options like Helical Piles, and PermaColumns, which may have higher upfront costs, offer a guaranteed extension to the life of your deck.
Similar to the posts you use, the framing also has options outside of the traditional, budget friendly, pressure treated lumber. More and more deck frames are being built with steel or structural composite materials because homeowners see the added value you get versus traditional lumber.
3. Leave Room for Add-Ons
Even if you don’t add lighting or privacy screens now, planning for them during construction can save money later.
Should You Hire a Professional Deck Builder?
While some homeowners might think about tackling a deck project on their own, there's major benefits to hiring the pros that are worth considering:
Expertise and Experience: Professionals bring years of experience to the table. There's no better way to ensure that your deck is built correctly and safely.
Quality Materials: They have experience working with high-quality materials, meaning they can help you choose the best options for your budget and design preferences.
Time Efficiency: A professional team can complete the project much faster than a DIY approach, allowing you to enjoy your new deck sooner!
Permitting and Regulations: The pros are familiar with local building codes and regulations, which can save you from potential legal issues down the line.
Design Assistance: The experts do this for a living, so they typically can provide valuable design insights and ideas that you might not have considered.
Warranty and Support: Many professional services offer warranties on their work as well as knowing the warranties on the products you are using. Some products require the installer to be certified for the warranty to be valid.
Overall, while DIY can be tempting, the advantages of hiring professionals often outweigh the initial cost, leading to a more successful and satisfying deck project.
How Long Does a Deck Take to Build?
Here's another question that depends on the deck's design, but generally, decks in the London area are finished within:
2–7 days for standard builds
1–3 weeks for complex or multi-level designs
Weather, inspections, and getting materials can mess with timelines, but having a solid construction plan keeps things running smoothly.
Deck Costs and Property Value
A nicely designed deck can really boost your home's charm and resale value. Buyers all over Ontario love a backyard with beautiful living spaces, especially when they're:
Low maintenance
Built by a professional
Designed for entertaining or family use
Local Considerations for London & Surrounding Areas
Homeowners in this region should factor in:
Frost-depth footing requirements
Setback rules near property lines
Height regulations for railings and guards
Permit thresholds for attached decks
Working with a local builder helps ensure your deck meets regional building standards and bylaw requirements.
Frequently Asked Questions About Deck Costs
Do I need a permit to build a deck in London, Ontario?
I always tell homeowners, if they want the peace of mind that things are being done right, save yourself the worry and apply for a permit. This assures that the deck is inspected and conforms to local bylaw standards. In certain instances a permit is required. Particularly, if the deck is attached to your home or if it's over 2' high. The specific requirements can vary based on the size and height of the deck, but it’s always a good idea to consult with a professional contractor who can walk you through the necessary steps and what may or may not be required .
What’s the most affordable decking option?
If you're looking for a budget-friendly option, pressure-treated wood is the clear stand out. It's affordable and durable, making it a popular choice for many homeowners. Plus, it holds up well against the elements, which is a big plus in our climate.
Is composite decking worth the extra cost?
Absolutely! For many homeowners, composite decks are a great choice. They really save you money in the long run because you won't have to worry as much about maintenance, staining, or repairs. Plus, they keep looking good for years, which is a big bonus! And if you can afford it, consider upgrading your framing so that your decks foundation lasts as long as the decking!
Thinking About Building a Deck?
When you think about a deck, it’s really more than just a platform. It's a place where families can gather, enjoy summer barbecues, and unwind during those peaceful evenings at home.
When you think about a deck, it’s really more than just a platform. It's a place where families can gather, enjoy summer barbecues, and unwind during those peaceful evenings at home. Whether it's a cozy family gathering or a lively get-together with friends, your deck is a place where laughter and joy come to life. If you're looking get started on that deck project and live in London, St. Thomas, Strathroy, West Lorne, Komoka, Mount Brydges or any of the surrounding areas, reach out and we'd be happy to help answer any questions.
Ready to Get a Free Deck Estimate?
At Deck Savvy, we design and build custom decks tailored to your home, budget, and lifestyle. From classic wood designs to low-maintenance composite builds, we help bring outdoor spaces to life.
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