How Much Does It Cost to Cover An Existing Deck?

A well-crafted deck is the perfect spot to enjoy nature and entertain friends and family. However, outdoor deck usage is often limited by the weather. Covering an existing deck can significantly enhance its functionality and comfort. Not only that, but it also protects the deck structure and extends its lifespan.

Overall, covering an existing deck requires a budget ranging from $2,000 to $12,000. This can be very different depending on the patio’s size, the type of covering, and the materials used.  Awnings, pergolas, and other simple choices can cost anywhere from $1,000 to $3,700. On the other hand, roofs that are stronger can cost anywhere from $3,000 to $10,000 or even more.

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What is the average cost of covering decks of different sizes?

The average cost to cover an existing deck is roughly $10 to $60 per square foot. This price includes materials, labor, and basic installation. The wide range reflects the difference between simple shade options and more complex roof systems. To build a new covered deck from scratch, total costs commonly range from around $2,500 to $36,000. The final price depends on size, design, and finish level.

The table below gives estimates for covering existing decks of various sizes. These are based on national averages. For regions with higher costs, add about 10%–20%.

What is the cost of covering the deck using different methods?

The cost to cover an existing deck varies widely. It primarily depends on the type of cover you choose, material quality, project complexity, and your location. Below are estimated costs based on different covering types.

Various types of deck coverings differ significantly in cost, appearance, functionality, and durability. Below is a detailed cost analysis of the mainstream options available on the market:

Sun Sails

Sun sails average $1–2 per square foot, with total costs ranging from $150 to $500. They are made of taut canvas or polymer cloth and are attached to deck posts or other strong anchors with ropes to make flat or curved shade structures.

• Pros: They offer the lowest cost and simplest installation. Additionally, they come in diverse colors and shapes and are easy to dismantle and store.
• Cons: They are only suitable for summer sun protection. They can’t stand up to snow, hail, or strong winds, and they need to be checked and tightened often.

Awnings

Manual awnings have an average cost of $5–15 per square foot. Total costs range from approximately $200 to $3,000. Motorized retractable awnings are slightly more expensive, costing $20–35 per square foot. Total costs can reach $6,000.

• Pros: They typically consist of an aluminum frame and a canvas canopy. Their advantage is high flexibility, and they can be retracted when not in use to maintain an unobstructed view.
• Cons: They are similar to shade sails; they cannot withstand severe weather. The canvas canopy requires regular cleaning and has a limited lifespan.

Related Content Reading: 10 Deck Awning Ideas to Create a Shaded Outdoor Space

Pergolas

The average cost of a pergola ranges from $10 to $40 per square foot. For a 200-square-foot deck, the total cost of installing a pergola ranges from approximately $2,000 to $8,000. Custom designs can reach $30 to $65 per square foot. Pergolas typically feature an open lattice roof structure. They provide partial shade and create a romantic garden ambiance.

• Pros: This permanent building looks nice and can hold climbing vines to make the shade better.
• Cons: However, it does not provide complete rain protection. Wooden pergolas require regular maintenance to prevent rot.

Gazebos

Gazebos are typically freestanding structures with solid roofs. Their sides are usually open, featuring designs like single-slope or double-slope roofs. The average cost ranges from $35 to $60 per square foot. The total cost for a medium-sized deck pavilion typically ranges from $7,000 to $12,000.

• Pros: The gazebo provides all-weather shelter and serves as a permanent structure. It significantly enhances both the aesthetic appeal and functionality of a yard.
• Cons: Initial costs are relatively high. It is one of the most expensive options for covering a deck. Building a gazebo requires a solid concrete foundation and obtaining a building permit. Additionally, wooden gazebos also require frequent maintenance.

Permanent Roof Extensions

Many homeowners choose to extend their building’s roof. This is also a highly durable, sturdy deck-covering solution. It provides excellent protection and harmonizes with the home’s exterior. The average cost ranges from $60 to $155 per square foot. This method may cost between $12,000 and $24,000 or more. This price reflects the structural work and materials involved.

• Pros: Provide seamless protection and a strong return on investment, often recouping 50%–80% of the cost in resale value.
• Cons: Complex builds that require engineering and inspections. In addition, this design also requires concrete foundations and building permits.

Aluminum-Wood Composite

The exterior of the aluminum-wood composite structure features an aluminum shell with a wood grain finish. Its interior is filled with a foam core for thermal insulation. It combines the aesthetic appeal of wood with the durability of aluminum. The average cost ranges from $30 to $60 per square foot. For a 200-square-foot deck, the total cost of aluminum-wood cladding ranges from approximately $4,000 to $10,000. 

• Pros: It includes resistance to pests, moisture, and corrosion. It requires minimal maintenance and offers excellent thermal insulation.
• Cons: Can dent under impact; higher upfront cost than wood. Reduced maintenance can offset this premium over time.

Screened Porch

Want an outdoor living space protected from insects and rain? Consider building a screened porch. Install screen walls around an existing deck with a sturdy roof. Enclose it completely to create a porch space. A screened porch offers a relatively cost-effective option. The average cost is approximately $10–25 per square foot. Its total cost generally ranges from $1,000 to $1,900. 

• Pros: It includes ventilation and breathability, making it ideal for summer use.
• Cons: It includes the need for regular maintenance to prevent screen damage. In addition, screens can tear and may need replacement every few years.

Related Content Reading: Top 12 Unique Under-Deck Screened Porch Ideas

Factors Affecting Total Cost

Beyond the decking method, the following factors also influence the final expense.

• Deck Size: This is the most direct factor. Larger decks require more materials and longer construction time.
• Material Selection: Materials form the core of the cost. For instance, standard lumber is cheaper than composite decking materials. However, composite decking offers better value in terms of lifespan and maintenance costs. Additionally, material thickness and brand also impact the final price.
• Labor Costs: Installation expenses constitute a major portion of the total project cost. Labor rates vary by region, contractor type, and project complexity. For straightforward construction projects, DIY installation may be feasible, yielding significant savings. For complex undertakings like roof extensions, hiring a professional contractor is advisable.
• Deck Condition: Some projects require assessing the structural integrity of the existing deck. It must support the additional weight of the new roof. This may necessitate deck repairs or even partial demolition, increasing upfront costs.
• Design Complexity: A simple, gable roof is more economical. Complex roof lines add to the cost.
• Height: Taller roofs require longer posts and sturdier foundations, increasing expenses.
• Insulation: Adding extra insulation layers increases material costs. However, it significantly improves comfort.
• Extra Features: It costs extra to install things like outdoor outlets, light fixtures, and ceiling fans. Permits: Most permanent structures, especially roof extensions and gazebos, require building permits. These typically cost between $60 and $1,800.

Case Study: A Real-World Example

A homeowner in Los Angeles chose a composite pergola for their 200-square-foot deck. The initial quote was around $6,000. By scheduling the project in the off-season and handling some prep work, they negotiated a discount of roughly 10%–15%. This brought the total closer to $5,100. Over five years, the low-maintenance composite saved them a few hundred dollars in upkeep compared to wood. An appraiser later noted that the covered space added several thousand dollars of perceived value to the home.

Note: This example is for illustration. Actual costs and value will vary.

How to Save on Costs When Covering an Existing Deck

If you’ve already planned how to cover your existing deck, you can save on installation costs by:

• Getting Quotes From Multiple Contractors: By comparing prices from several contractors, you can save 10% to 15%. Off-season installation rates are typically 5% to 20% lower.
• Choose Cost-Effective Materials: Unit prices vary significantly between material types. Substituting materials can reduce costs without compromising appearance or functionality. Consider both initial cost and long-term durability when selecting materials. For example, composite decking materials have a slightly higher initial cost. However, they offer a longer lifespan and require no maintenance.
• Stage Construction: Dividing the project into phases effectively controls costs. For instance, build the deck structure first before adding electrical systems and other features.
• Mix Materials Strategically: Use more expensive materials in prominent areas. Use less expensive materials in less visible areas.
• Watch for Product Discounts: Many decking material suppliers offer discounts on certain products. This can help you save on overall costs.
• Partial DIY Construction: If you have construction experience, you can complete some of the work yourself. This also helps reduce construction costs.
• Utilize Existing Structures: Utilize existing trellises or other structures on your house or deck. This can also save on the cost of support beams and other items.
• Understand Local Policies: For example, some local governments offer subsidies for shade structures.

Conclusion

Covering your existing deck can fundamentally transform your outdoor living experience. People with different wants and budgets can find a solution that works for them, from simple shade sails to building screened porches. When planning, consider your budget, functionality, and long-term maintenance requirements.

Before making a final decision, obtain detailed estimates from reputable contractors. If you have further questions about outdoor decks, please contact us. COOWIN provides premium composite wood decking and answers your questions.

FAQ

Can I Add a Roof to Any Existing Deck?

You need to make sure that the frame of the deck you already have is strong enough to hold the extra weight. If you want to build a pergola or other structures on top of the deck, you may need to strengthen it or add new supports.

How High Should a Deck Roof Be?

A height between 8 and 12 feet is recommended. This aligns with typical indoor ceiling heights. A roof that is too low can feel oppressive and trap heat, while one that is too high may appear disproportionate.

Can I Barbecue on a Covered Deck?

This is generally not recommended. Using an open-flame grill in an enclosed or semi-enclosed space is highly dangerous. Flammable roofing materials and accumulated smoke pose significant safety risks. If you must do so, ensure the space is extremely well-ventilated. Additionally, local laws and regulations may prohibit this practice in certain areas.

How can I Safely Heat a Covered Deck?

The safest option is to use a portable electric heater. If the space is well-ventilated, propane heaters or tabletop fire pits may also be used. Always follow safety guidelines, keeping heaters away from walls and flammable materials.

Does a Covered Patio Increase Home Value?

Covered patios typically enhance a home’s overall appraisal value. A well-designed patio inherently boosts a property’s curb appeal. Enclosing an existing patio creates an all-weather outdoor living space. This can yield a high return on investment.