Building a Four Seasons Sunroom or Home Addition is an exciting opportunity to expand your living space without the hassle of moving. Imagine enjoying more natural light, year-round protection from the elements, and a beautiful, functional area where your family can relax and grow—all from the comfort of your current home.

At Four Seasons Sunrooms & Additions, we bring over 30 years of experience in designing and installing custom sunroom additions. We’re proud to be Southwestern Ontario’s leading choice for sunroom design and expert installation.

To help you get started, we’ve listed the starting prices for our most popular sunroom and patio cover models below—so you can begin planning your new sunroom with clarity and confidence.

7 Key Factors that affect sunroom costs

When planning your Four Seasons Sunroom or home addition, understanding what impacts the overall cost can help you budget more accurately and avoid surprises. Here are the key elements that will influence your investment:

1. What’s already in place?

The existing structure and condition of your home have a major impact on project costs. Factors such as foundation work, electrical access, and the condition of adjacent walls or roofing can either streamline or delay the installation process.

2. Four Seasons Sunrooms Materials and Insulation

At Four Seasons Sunrooms & Additions, we provide a variety of solutions, from screen rooms and traditional sunrooms to fully insulated, year-round home additions.

• • • Screen Rooms – The most affordable option, offering protection from bugs and some weather elements.
    • Three-Season Sunrooms – Built with single-pane glazing, providing shelter from wind, rain, and insects.
    • All-Season (Four-Season) Sunrooms – Constructed with insulated aluminum structure and Insulated Glass to withstand year-round Canadian weather.
    • Fully Integrated Home Additions – Featuring vinyl windows and doors, meeting building code requirements to open an addition up to your home (e.g., knocking down a wall in the house to have a sunroom open concept).

3. Four Seasons Sunrooms Sizes

The size of your sunroom plays a direct role in overall cost. Larger sunrooms require more materials, labor, and potentially more extensive integration with your home’s structure.

4. Roof integration with your home

Seamlessly tying your new sunroom roof into your existing roofline can involve significant structural and design work. The complexity of the connection affects labor time and materials—especially if your home has a unique or intricate roof style.

5. Roof type for your Four Seasons Sunroom

Four Seasons Sunrooms offer various roof options, including solid insulated roofs, cathedral styles, and glass roof systems. Each offers different aesthetic and functional benefits, with corresponding differences in pricing.

6. Heating & Cooling Options

When determining how to heat and cool your sunroom, it’s important to take into account the climate, the room’s size, and how you intend to use the space.

7. Additional work and customization

When designing your sunroom addition, it’s important to recognize potential additional costs that may arise due to various factors. While these costs aren’t always necessary, being prepared for them will help you manage your budget effectively. Some common examples of additional costs include:

1. • Electrical requirements
   • Exterior decks or patios
   • Finished Flooring materials
   • Interior finishes

Four Seasons Sunrooms Pricing

In 2024, the average cost for one of our sunrooms ranged between $80,000 + tax and $90,000 + tax (CAD). However, since each sunroom is uniquely designed and tailored to suit your needs and site conditions, there isn’t a standard price per square foot.

While the information below serves as a general guide, it’s important to note that actual pricing may vary depending on the complexity of the project, materials, and site-specific factors. Below are some starting costs for our popular models:

Sunrooms

• • Three-Season Sunroom (12’x12’ – Solid Roof): Starting at $52,000 + HST 
  • Four-Season Sunroom (12’x12’ – Solid Roof): Starting at $57,000 + HST
  • Four-Season Sunroom (12’x12’ – Glass Roof): Starting at $74,000 + HST
  • Conservatory (12’6” x 12’6”): Starting at $95,000 + HST

Patio Covers

• • Patio Covers  (Glass Roof) (12×12): $40,000+HST  

• • Patio Covers  (Solid Roof) (12’x12’): $23,000+HST 

The preliminary cost estimate includes the supply and installation of the sunroom or patio cover system, along with drawings and structural engineering. It does not include costs related to flooring, foundation, heating and cooling systems, or other additional components.

Let our experts help make your sunroom vision a reality.

Contact us today to book a consultation and receive a personalized quote.