The cost of building a deck in Canada can vary significantly depending on various factors such as the size, materials used, design complexity, location, and additional features. It's important to note that the following estimates are general guidelines and the actual costs can vary.

On average, for a basic deck with pressure-treated wood and a size of approximately 200 to 500 square feet, you can expect to pay between $15 to $35 per square foot. This would include the cost of materials, labor, and basic features like stairs and railings. However, keep in mind that this estimate may not include additional expenses such as permits, site preparation, lighting, built-in seating, or special design elements.

If you opt for higher-end materials like cedar, redwood, or composite decking, the cost per square foot can increase to $30 to $60 or more. These materials often provide greater durability, aesthetics, and low-maintenance features.

For larger or more complex decks, the cost per square foot may decrease due to economies of scale. Conversely, smaller or intricate designs may incur higher costs due to increased labor and material requirements.

It's recommended to obtain detailed quotes from reputable contractors or builders who can assess your specific requirements and provide accurate cost estimates based on your desired deck specifications.

When building a deck, several requirements need to be considered to ensure compliance with local building codes and regulations. Here are some common requirements:

1. Permits: In most jurisdictions, obtaining a building permit is a prerequisite for deck construction. 

2. Structural Design: Decks must be designed to meet specific structural requirements to ensure stability and safety. This includes determining the appropriate size and spacing of beams, joists, and posts based on the load-bearing capacity of the materials used and the expected use of the deck.

3. Footings and Foundations: Proper footings and foundations are essential to support the weight of the deck and prevent shifting or sinking. The depth and size of footings will depend on factors such as soil conditions, deck size, and local building codes.

4. Guardrails and Handrails: Guardrails and handrails are necessary for safety, especially for elevated decks. The height and spacing requirements for guardrails and handrails vary by jurisdiction but are typically designed to prevent falls and ensure structural integrity.

5. Stairs: If your deck requires stairs, they must be built to code with appropriate dimensions, riser heights, and tread widths. Handrails may also be required for stairs, depending on the number of risers.

6. Balconies and Landings: If your deck includes balconies or landings at different heights, specific requirements for their design and safety will need to be met. This may include guardrails, handrails, and proper structural support.

7. Electrical and Plumbing Considerations: If you plan to incorporate electrical outlets, lighting, or plumbing fixtures into your deck, you may need to follow additional regulations and obtain permits for these installations.

Building your own fence can potentially be cheaper compared to hiring professional contractors, but it depends on various factors. Here are some considerations:

1. Skills and Experience: Building a fence requires a certain level of skill and knowledge in construction and carpentry. If you have experience in DIY projects and feel confident in your abilities, you may be able to save on labor costs by building the fence yourself. However, if you lack the necessary skills or are unsure about the process, it could lead to mistakes, additional expenses, and potential safety hazards.

2. Time and Effort: Building a fence is a time-consuming task that requires careful planning, measuring, digging, and assembling. You need to consider if you have the available time and willingness to dedicate yourself to the project. DIY fence installation may take longer compared to professional contractors who have the expertise and resources to complete the job efficiently.

3. Tools and Equipment: Building a fence 

requires specific tools and equipment such as post hole diggers, saws, levels, and drills. If you don't already own these tools, you'll need to factor in the cost of purchasing or renting them, which can add to the overall expenses.

4. Materials and Quality: The cost of materials can vary depending on the type of fence you choose, such as wood, vinyl, or metal. Contractors often have access to wholesale prices or discounted rates due to their industry connections, which may make their material costs more competitive. Additionally, professionals can guide you in selecting the most suitable and durable materials for your specific needs.

5. Long-Term Durability: Hiring professional contractors ensures that the fence is built to code and constructed with quality workmanship. This can provide greater durability and longevity, reducing the need for future repairs or replacements. DIY projects may have a higher risk of errors or shortcuts that could affect the fence's stability and lifespan.