How much does a rooftop deck cost?
How much does a rooftop deck cost?
$35 – $120 average cost per square foot (deck & railing installation)
$10,500 – $36,000 average rooftop deck installation cost (300 SF)
Average rooftop deck cost
Adding a rooftop deck costs $35 to $120 per square foot, depending on the roof’s condition, access points, materials, and design choices. Total costs range from $10,500 and $36,000 for a typical 300-square-foot deck. Remember to budget for permits and any necessary structural reinforcements.
| Deck size (square feet) | Average installed cost |
|---|---|
| 150 | $5,300 – $18,000 |
| 300 | $10,500 – $36,000 |
| 450 | $15,750 – $54,000 |
| 600 | $21,000 – $72,000 |
| 1,000 | $35,000 – $120,000 |
What affects the cost of building a rooftop deck?
A rooftop deck consists of several key components, including decking material, safety railings, and support beams for stability. Additionally, you can enhance the space with features like lighting and seating, which improve functionality and appearance—all of which will impact the overall cost.
Decking material
A primary consideration for a rooftop deck is the cost to install decking, which ranges from $25 to $80 per square foot, depending on the material. Options vary from budget-friendly pressure-treated pine to low-maintenance composite decking. The material you choose impacts both your overall budget and the long-term performance of your deck.
| Material | Cost per square foot installed* | Pros | Cons |
|---|---|---|---|
| Pressure-treated pine wood cost | $25 – $50 |
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| Composite decking cost | $40 – $80 |
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| Trex decking cost | $45 – $70 |
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| AZEK decking cost | $60 – $80 |
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| PVC decking | $50 – $70 |
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*Cost includes materials and labor.
Check out these additional deck ideas to inspire your next deck project.
Safety railings
In addition to the decking material, your rooftop deck will require railings for safety. Deck railings cost $20 to $60 per linear foot with installation for wood or vinyl. Higher-end materials like cable or glass can cost $60 to $600 per foot for a sleeker look that preserves the view.
Looking to elevate your new rooftop deck's style? Check out our collection of creative deck railing ideas.
Other structural components
Depending on your roof’s condition and access, your rooftop deck will likely need additional structural components—such as support beams, waterproofing, and access stairs—which also add to the total project cost.
A structural engineer costs $100 to $220 per hour to evaluate whether a rooftop deck is safe and structurally sound enough to support the added weight of furniture, people, and plants.
Support beams cost $3 to $30 per linear foot, depending on the material used and specific load-bearing requirements, and are essential for distributing weight evenly across the deck.
Exterior waterproof membrane costs $4 to $7 per square foot to protect the underlying structure from water damage, ensuring longevity and preventing leaks.
Access stairs cost $1,000 and $5,000 with professional installation. Options include wood, metal, or composite materials, with designs available in straight or spiral configurations.
Be sure your contractor adheres to local building codes to ensure safety and compliance for your rooftop deck structure.
Add-on features
Beyond the structure itself, there are numerous features you may want to add to make the rooftop deck more beautiful and functional. These can include:
Deck covers cost $10 to $60 per square foot for shaded comfort.
An outdoor kitchen costs $10,000 to $35,000 for a custom outdoor kitchen.
An outdoor fireplace costs $1,500 to $9,000 for a prefab fireplace.
Outdoor furniture costs $500 to $1,000 for lounge seating or an outdoor dining area.
Outdoor lighting costs from $50 to $500, depending on the type of lighting you install.
Rooftop deck FAQs
Does a rooftop deck increase property value?
A rooftop deck can enhance property value, particularly in urban areas where outdoor space is limited. The increase depends on factors like construction quality, design features, and market demand. A well-built deck with appealing amenities can attract buyers and justify a higher home sale price, making it a worthwhile investment for homeowners seeking to boost their property's appeal.
Where can I build a rooftop deck?
Flat roofs are typically ideal for deck construction due to their stability, while pitched roofs may require special engineering to create a level surface. It's essential to ensure that you work with a structural engineer to confirm the roof can support the added weight.
How long does a rooftop deck last?
Wooden decks last 10 to 25 years, while composite decks last 25 to 50 years. Factors like design, material quality, installation standards, and ongoing care play significant roles in determining how long your rooftop deck will last.
Does insurance cover damage on a rooftop deck?
While insurance may cover rooftop deck damage under certain conditions—such as storms, fire, or vandalism—it’s essential to review your policy for specifics. Coverage typically depends on the type of insurance you have, the cause of the damage, and whether the deck was installed according to code.
Getting estimates from deck installers
When getting estimates from deck builders, use these tips to ensure you receive accurate bids:
Get at least three estimates to compare prices and services.
Specify size, materials, and features to help installers provide accurate bids.
Discuss different materials and their costs with each installer.
Ask for detailed breakdowns of costs for labor, materials, and other expenses.
Be aware of any permits or inspections needed in your area.
Confirm the contractor is licensed, insured, and offers warranties.
Questions to ask a deck contractor
Ask your deck builder these questions to ensure you choose a qualified contractor:
Are you licensed and insured?
Can you provide references or a portfolio?
What decking and railing materials do you recommend?
Will you handle the necessary permits?
How do you ensure the structural integrity of the rooftop deck?
What is your estimated timeline for the project?
How do you handle changes or unforeseen issues?
Who will be my main point of contact?
What warranties do you offer?
What is your payment schedule?
Using our proprietary cost database, in-depth research, and collaboration with industry experts, we deliver accurate, up-to-date pricing and insights you can trust, every time.