Two Ways to Enjoy the Outdoors From Home
Both screened porches and sunrooms extend your living space outdoors, but they are very different projects with different costs, uses, and returns on investment. Understanding the differences helps you make the right choice for your home and budget.
What Is Each?
A screened porch is an open-air structure enclosed with screen mesh. It has a roof and often a ceiling fan, but no climate control. Screens keep insects out while allowing airflow. You can use it comfortably from spring through fall in most climates.
A sunroom (also called a four-season room) is a fully enclosed room with insulated walls, windows, and climate control (heating and cooling). It functions as a true indoor room that happens to have lots of windows and natural light. You can use it year-round.
Cost Comparison
Screened porch (converting an existing deck): $5,000 to $18,000. If you already have a deck, you are adding posts, a roof structure, screen framing, and a screen door. The existing deck serves as your floor. This is the most affordable option.
Screened porch (built from scratch): $15,000 to $35,000. Building a new screened porch from the ground up including foundation, framing, roof, and screening.
Sunroom (three-season): $15,000 to $40,000. Includes windows instead of screens but may not have full insulation or climate control. Usable spring through fall, plus mild winter days.
Sunroom (four-season): $25,000 to $70,000+. Fully insulated walls, double-pane windows, HVAC extension, and electrical. This is essentially adding a new room to your house.
Which Gets More Use?
This depends entirely on your climate:
Southern states (FL, TX, GA, SC, NC): A screened porch gets 8-10 months of use per year. The mild winters make full insulation less necessary, and the screen porch provides essential mosquito protection during warm months. A screened porch is often the better value in the South.
Northern states (NY, PA, OH, MI, MN): A screened porch gets only 4-6 months of use. A four-season sunroom provides year-round living space and is often the better investment if you have the budget.
Mid-Atlantic and Pacific Northwest: Either option works well. A three-season sunroom offers a good middle ground — usable 8-9 months and significantly cheaper than a four-season room.
Return on Investment
According to national remodeling data, both options add value but at different rates:
Screened porch ROI: 70% to 85% cost recovery at resale. Screened porches are popular with buyers in warm climates and are seen as valuable outdoor living space.
Sunroom ROI: 50% to 70% cost recovery at resale. Sunrooms cost more to build, so even though they add value, the percentage recouped is lower. However, the absolute dollar amount added may be higher because the project costs more.
In practical terms, a $12,000 screened porch that recovers 80% adds $9,600 to your home value. A $50,000 sunroom that recovers 60% adds $30,000. The sunroom adds more absolute value, but the screened porch is the better bang-for-buck investment.
Maintenance Comparison
Screened porch: Low maintenance. Replace torn screens as needed ($50 to $200), repaint or restain the structure every 3-5 years. Screens do tear over time from weather, pets, or kids.
Sunroom: Moderate maintenance. Windows need cleaning, weatherstripping replacement over time, and the HVAC system needs regular service. Similar to maintaining any room in your house.
The Bottom Line
If your budget is under $20,000 and you live in a warm climate, a screened porch is the clear winner. If you want year-round living space and can invest $30,000+, a four-season sunroom adds a true room to your home. And if you already have a deck, converting it to a screened porch is one of the highest-ROI home improvement projects you can do.
For the complete deck-to-screened-porch conversion process, check out our step-by-step guide. Use our cost calculator to estimate your specific project.