Three-Season Sunrooms
Extend your outdoor living season without the cost of a full four-season build.
Three-season sunrooms are the sweet spot for many Flagstaff homeowners. They give you a bright, airy space to enjoy from spring through fall, without the higher cost of a fully insulated four-season room. If you're looking to extend your outdoor living season and create a comfortable space for warmer months, a three-season sunroom is an excellent choice.
What makes a sunroom three-season? It's designed for use during moderate weather, typically when outdoor temperatures are between 40 and 90 degrees. You get large windows for natural light and ventilation, durable framing, and a solid roof overhead. It's not heated or air-conditioned like a four-season room, but it protects you from bugs, wind, rain, and direct sun. You can relax, entertain, or dine in comfort for most of the year.
At BoldChoice Flagstaff Sunrooms, we've been building three-season sunrooms since 2024, and we understand what works in the high desert climate. We use quality materials that stand up to UV exposure, temperature swings, and occasional weather extremes. Your custom sunroom in Flagstaff will be built to last, giving you years of enjoyment without the ongoing maintenance headaches.
What You Get With a Three-Season Sunroom
Three-season sunrooms are simpler than four-season rooms, but that doesn't mean they cut corners. You still get a professionally built structure with quality materials and thoughtful design. Here's what typically goes into a three-season sunroom.
First, you get a strong frame, usually aluminum or vinyl, designed to support large windows and a solid roof. The frame sits on a foundation, which can be a concrete slab, existing patio, or deck depending on your property. Next come the windows, usually single-pane glass or vinyl panels that open and close for ventilation. You can customize window styles to match your home.
The roof is another important feature. Most three-season sunrooms use a shingle roof to match your home, though some homeowners choose glass or polycarbonate panels for extra light. We also install gutters and proper drainage to keep water away from your foundation. Inside, you can add ceiling fans, lighting, and electrical outlets to make the space fully functional.
Because three-season sunrooms aren't climate-controlled, they cost less to build and maintain than four-season rooms. That said, they still add real value to your home and expand your usable living space for a big chunk of the year. If you want a space that's usable year-round, check out our four-season sunrooms instead.
Why Flagstaff Homeowners Choose Three-Season Sunrooms
Three-season sunrooms are popular in Flagstaff for good reason. They're affordable, versatile, and perfect for our climate. Here's why so many local homeowners go with a three-season design.
- Lower cost: Three-season rooms cost 30-50% less than four-season sunrooms
- Faster installation: Most projects take 4 to 8 weeks from start to finish
- Bug-free outdoor living: Enjoy fresh air without mosquitoes, flies, or wasps
- Protection from elements: Stay dry during rain and shaded during hot afternoons
- Flexible use: Perfect for dining, entertaining, hobbies, or relaxing
- Easy maintenance: No HVAC systems to service, just occasional cleaning
In Flagstaff, three-season sunrooms work especially well because our spring, summer, and fall seasons are so enjoyable. You get months of comfortable outdoor living without dealing with winter heating costs or complex climate control systems. It's a practical choice that gives you the most bang for your buck.
Some homeowners eventually decide to upgrade their three-season sunroom to four-season. If that sounds like you, we can help with that too. Our sunroom conversion and upgrade services make it easy to transform your existing space into a year-round retreat.
Design Options for Your Three-Season Sunroom
Every three-season sunroom we build is custom designed to match your home and fit your lifestyle. You're not stuck with a one-size-fits-all kit. Here are some design choices to consider.
Size and Shape
Three-season sunrooms can be as small as 10x10 feet or as large as 20x30 feet or more. The size depends on your available space, budget, and how you plan to use the room. Rectangular designs are common, but we can also build L-shaped or wraparound sunrooms if your property allows. We'll help you choose a layout that maximizes natural light and views.
Window Styles
You can choose from sliding windows, double-hung windows, or fixed glass panels. Many homeowners mix styles, using fixed glass for walls and operable windows for ventilation. Screens are standard on all operable windows, so you can let fresh air in without letting bugs in. We also offer tinted glass options if you want extra UV protection.
Flooring and Finishes
Flooring choices include tile, vinyl plank, stained concrete, or outdoor-rated carpet. We recommend materials that can handle temperature changes and occasional moisture. For finishes, you can match your home's exterior siding and trim, or choose contrasting colors for a unique look. Ceiling fans, recessed lighting, and electrical outlets complete the space.
Ready to Add a Three-Season Sunroom?
Let's discuss your project and create a sunroom you'll love. Call us for a free consultation.