The cost to add a screened-in porch over an existing deck depends on several key factors. Size, roof style, and the way the new roof ties into the house all affect the price. This guide explains what you can expect and where the main costs come from.
How Much Does a Screened-In Porch Cost on a 16×12 Deck?
For a common 16×12 project built over an existing deck, most budgets land near $30,000. Here is the simple breakdown:
- Roof addition and tie-in to the house: about $20,000
- Screen system with door: $6,000 to $8,000
- Basic electrical for a fan and lights: project-specific
These ranges come from real builds. Roof structure and your house’s roof lines are the biggest cost drivers.
Key Takeaway: Roof design sets the base price. Complex tie-ins add labor and detail, which raises the total.
Which Roof Style Costs More?
- Shed roof: Usually the lowest cost and a clean tie-in.
- Gable roof: Our most common build. Mid-range cost and classic look.
- Hip roof: More cuts and framing. Often the highest cost.
Need expert help with a screened-in porch to an existing Deck? Contact DW Decks for a free consultation.
What if There is No Deck Yet?
Starting from bare ground adds about $20,000 for a new 16×12 foundation and deck frame before we build the porch. Using a current frame often saves money. If the frame is weak or out of code, we can rebuild it now and keep the project under one permit.
Pro Tip: Ask for a framing check before design. Fix the structure early to avoid change orders and protect the screen system from movement.
What Upgrades Change the Price the Most?
- Electrical package: Fan box, dimmer, extra outlets on the dry side.
- Floor surface: Pressure-treated, composite, or tongue-and-groove porch boards.
- Screen choice: Standard aluminum mesh or high-visibility mesh.
- Ceiling and trim: Beadboard look, stained ceiling, wrapped posts, simple crown.
- Door quality: Basic screen door or heavy-duty door with closer and sweep.
We itemize each upgrade so you can pick what matters and skip what does not.
Key Takeaway: Choose a roof style first. Then select one or two upgrades that improve daily use. This keeps the project on budget and still delivers comfort.
Do You Need Plans, Permits, and Inspections?
Yes. We draw plans, pull permits, and schedule inspections with your city. Inspectors check posts, beams, roof tie-in, flashing, electrical boxes, and safety clearances. Clear plans and neat work help the job pass on the first visit and protect warranties.
How Long Does the Build Take?
Most 16×12 screen porches take 2 to 4 weeks on site once permits are approved. Weather, electrical schedules, and material lead times can affect the start date. We share a simple timeline and keep you updated.
Is a Screened-In Porch Worth It?
For many homes, yes. You gain a bug-free space for meals, work, or quiet time. Shade and airflow make summer afternoons easier to enjoy. The roof also shields deck boards from heavy sun, which can extend surface life. A clean tie-in that matches shingles, fascia, and soffit helps the porch look original to the house.
Pro Tip: Ask us to match roof pitch and trim profiles. Consistent lines help the porch blend in and support resale value.
Get Your Exact Price from DW Decks
Every house is different. We check the frame, measure roof tie-ins, confirm setbacks, and list options that fit your goals. Then we deliver a clear, itemized quote with no guesswork.
Ready to plan your screened-in porch? Book a site visit with DW Decks today. We will price your project, confirm code needs, and map a clean build plan. Call us to schedule your free consultation and start enjoying your new space.
