What Does It Really Cost to Build a Screened In Porch on an Existing Deck?

The cost to build screened in porch on existing deck typically falls between $2,000 and $5,800 for most homeowners — a fraction of what a brand-new screened porch costs to construct from scratch.

The exact number depends on your deck's size, condition, materials, and where you live. In coastal Florida, factors like wind-load requirements and salt-air-resistant framing can push costs toward the higher end of that range.

Your existing deck is actually your biggest money-saver. Because the foundation and floor structure are already in place, you're only paying for the framing, screens, and roof tie-in — not a new slab or substructure.

I'm Cody Lafferty, founder of Lafferty Aluminum & Screening in Melbourne, Florida, and I've spent over a decade helping Space Coast homeowners understand the real cost to build screened in porch on existing deck — from simple screen additions to fully engineered aluminum enclosures built for hurricane country. In this guide, I'll walk you through every cost factor so you can plan your project with confidence.

Average Cost to Build Screened In Porch on Existing Deck in 2025

If you are looking at your backyard deck and imagining a bug-free oasis where you can sip coffee without a mosquito "welcoming committee," you are in the right place. In 2025, the average cost to build screened in porch on existing deck is highly manageable because you already own the most expensive part: the foundation.

For a standard 200-square-foot deck, most homeowners spend between $2,000 and $5,000 for the conversion. This works out to roughly $10 to $25 per square foot. If your deck is already covered by a roof (a "lanai" style), you might even find yourself on the lower end of that spectrum, sometimes as low as $1,200 to $2,800 for the screening alone.

National Averages and Square Foot Pricing

When we break it down by size, the numbers become clearer. A small 12x12 enclosure (144 sq ft) typically costs between $1,500 and $3,500 to screen in. A larger 20x20 enclosure (400 sq ft) can reach up to $5,000 to $8,000, depending on the height of the walls and the complexity of the framing.

Nationally, the average rate to hire a professional for the labor portion of screening an existing structure is about $2 per square foot. However, keep in mind that this is just for the "screen-to-frame" work. If your deck needs new posts, a roof extension, or structural reinforcement, those costs will climb.

New Build vs. Existing Deck Comparison

Why is it so much cheaper to use your existing deck? A new screened porch build from scratch involves excavation, concrete footings or a slab, and a full floor structure. These new builds range from $25 to $120 per square foot, often totaling $15,000 to $36,000.

By starting with your existing deck, you are effectively "skipping" the first $10,000 of the project. You are reusing the structural integrity of your current outdoor space. For more details on these savings, check out our Cost to Screen in Porch Complete Guide.

Factors Influencing Your Deck Conversion Budget

Not all decks are created equal. Before we can nail down the cost to build screened in porch on existing deck, we have to look at what you’re starting with. If your deck was built to hold a couple of lawn chairs and a grill, it might not be ready for the weight of a roof and framing.

Material Impacts: Framing and Screen Types

The materials you choose will be the biggest driver of your final bill.

• Fiberglass Mesh: This is the most common and affordable option, costing about $0.15 to $0.50 per square foot. It’s easy to work with but can tear more easily than other materials.
• Aluminum Mesh: Slightly more durable and better for areas with high winds, costing $0.50 to $1.00 per square foot.
• Pet-Resistant Polyester: If you have a cat that thinks screens are vertical treadmills, this is a must. It’s much thicker and can withstand claws.
• Solar Screens: These are fantastic for our Florida heat, as they can block up to 30% of UV rays and heat gain, though they come at a premium.
• Framing: Aluminum framing is the gold standard in coastal areas like Merritt Island and Satellite Beach because it doesn’t rust or rot. Some pros use the Screeneze systems, which use an aluminum base and vinyl caps for a "no-staple" look that lasts longer.

Labor and Regional Pricing Variations

In Brevard and Indian River Counties, labor rates typically range from $40 to $60 per hour. However, regional factors play a massive role here. Because we live in a hurricane-prone area, our local building codes are much stricter than those in the Midwest.

For example, a project in Indialantic or Cocoa Beach may require enhanced engineering and "hurricane clips" to ensure the new porch doesn't become a kite during a storm. This can add $2,000 to $5,000 to a project compared to an inland location. To find experts who understand these specific coastal requirements, look for Screen Porch Companies Near Me that specialize in Florida-certified structures.

A critical question to ask before starting: Can Your Deck Support a Screen Enclosure? If we have to add extra footings or beef up the joists, it’s better to know that during the planning phase than halfway through construction.

Hidden Expenses and DIY vs. Pro Comparisons

We’ve all seen those "easy weekend project" videos, but when it comes to the cost to build screened in porch on existing deck, the "hidden" stuff can sneak up on you.

Cost to Build Screened In Porch on Existing Deck: DIY vs. Pro

If you are handy with a miter saw and a spline tool, you can save between $1,200 and $2,000 in labor. DIY kits for a 200-square-foot deck usually run around $1,000.

• DIY Timeline: While a pro can often knock this out in 1 to 2 days, a first-time DIYer should expect to spend at least two full weekends.
• Professional Timeline: We typically finish a standard screening in about 48 hours, ensuring the screens are drum-tight and the doors are perfectly hung.

If you’re considering the "sweat equity" route, read our guide on Screening Your Existing Porch to see if you have the right tools for the job.

Essential Add-Ons and Repairs

Don’t forget the "extras" that make the space livable:

• Screen Doors: A quality door averages $300, plus $50–$75 for installation.
• Permits: In areas like Palm Bay or Vero Beach, a screened-in porch is often considered a home addition. Permits can range from $100 to $800.
• Electrical: You’ll want a ceiling fan ($100–$500) and maybe some outlets for a TV or lamp. Hiring an electrician for these runs usually adds $400–$800.
• Deck Repairs: Before we build up, we have to look down. If your deck boards are rotting or the flashing against the house is missing, those must be fixed first to prevent future structural failure.

For a full checklist of what to look for, see 16 Things to Consider Before Building a Screened-In Porch.

ROI, Maintenance, and Cost-Saving Strategies

Is the cost to build screened in porch on existing deck worth it? The data says yes. A well-built screened porch offers a 75% to 84% return on investment (ROI). In Florida, where outdoor living is a year-round lifestyle, this feature can be a major selling point for your home.

Smart Strategies to Lower Your Cost

If you’re looking to shave some dollars off your estimate, try these tips:

1. Off-Season Scheduling: Contractors are often busiest in the spring. Scheduling your build in late fall or winter (yes, even in Florida!) can sometimes lead to better rates.
2. Fiberglass Mesh: While stainless steel is tougher, fiberglass is the most cost-effective way to get the job done.
3. Bundle Projects: If you’re also thinking about a pool enclosure or new gutters, doing them at once saves on "mobilization" costs (the fee for getting the crew and equipment to your house).
4. Sweat Equity: Even if you hire a pro for the framing, you can handle the painting or staining yourself to save a few hundred dollars.

Maintenance is also a factor. While a quality aluminum frame can last 50 years, screens typically need a "refresh" every 6 to 8 years. A full professional rescreening for a standard porch averages about $2,900. You can learn more about these long-term figures in The Costs of a Screen Porch.

For more inspiration on how to design your space, check out Different Ways to Screen in a Porch.

Frequently Asked Questions about Deck Screening

Is it cheaper to screen an existing deck than build a new one?

Absolutely. By using your existing deck as the foundation, you save between $5,000 and $15,000 on structural costs. You are essentially only paying for the "walls" and the roof tie-in.

Do I need a permit to screen in my existing deck?

In most parts of Brevard and Indian River Counties, yes. Because adding a roof or permanent framing changes the footprint and wind-load of the structure, local municipalities usually require a permit to ensure it meets Florida Building Code.

How long does it take to screen in a 200 sq ft deck?

Professionally, the installation of the screens and framing usually takes 1 to 2 days. However, the planning phase—including engineering and permit approval—can take 2 to 6 weeks depending on your local building department.

Conclusion

At Lafferty Aluminum & Screening, we’ve spent over 30 years perfecting the art of the Florida outdoor sanctuary. Whether you’re in Titusville, Melbourne, or Vero Beach, we understand that your deck is more than just wood and nails—it’s where your family gathers.

When you calculate the cost to build screened in porch on existing deck, you’re investing in a bug-free, shaded retreat that adds real value to your home. We specialize in custom aluminum solutions that stand up to the salt air and high winds of the Space Coast, ensuring your investment lasts for decades.

Ready to start your transformation? More info about screen enclosure costs is just a click away, or give us a call to discuss your specific deck project!