A Complete Cost Breakdown for Homeowners in Sherman, TX and the Texoma Area
Updated January 2025
If you’ve been searching online to find out how much it costs to add a sunroom to your home, you’ve likely run into the same frustrating answers:
“It depends on too many factors.”
“You’ll need to talk to a salesperson for an exact number.”
“We can design something around any budget!”
Sound familiar? Contractors have avoided giving clear pricing for years — leaving homeowners like you guessing what’s realistic and what’s not.
At MJB Interiors, we take a different approach. With years of remodeling experience across Sherman, Denison, McKinney, and the North Texas region, our goal is full transparency. You deserve to know what a sunroom costs before signing a contract.
In this article, you’ll learn what goes into the cost of a sunroom addition — from screen rooms to four-season spaces — and what kind of budget you can expect based on the size and type of build. By the end, you’ll be ready to plan confidently and choose the right contractor for your home.
How Much Does It Cost to Build a Sunroom?
In 2025, the average cost to build a sunroom in North Texas ranges from $10,000 to $85,000, depending on the size, materials, and whether it’s designed for seasonal or year-round use.
That’s a wide range — but it makes sense once you factor in these variables:
- Type of sunroom: screen room, three-season, or four-season
- Room size: larger rooms require more framing, foundation, and glass
- Existing structures: if your porch already has a roof or foundation, costs drop
- Heating and cooling: adding HVAC access increases comfort but raises the price
Let’s look closer at what each sunroom type costs and what you get for that investment.
How Much Do Different Types of Sunrooms Cost?
Screen Rooms — The Most Affordable Option
Screen rooms are the simplest and most budget-friendly type of sunroom. They’re enclosed with heavy-duty mesh screens instead of glass windows, protecting you from insects while still letting fresh air flow through.
A screen room addition in the Sherman or Denison area generally costs $8,000 to $30,000, depending on size, materials, and whether you’re enclosing an existing porch.
You’ll get an open-air space that feels like an outdoor living room — perfect for morning coffee, reading, or enjoying summer nights without mosquitoes.
Pros:
- Lowest cost per square foot
- Fastest installation (often one week or less)
- Minimal maintenance
Cons:
- Not usable year-round
- No insulation or temperature control
- Exposure to pollen, wind, and humidity
Screen rooms are ideal if you want a casual outdoor living space that extends your patio season from March through November without the price tag of a full addition.
Three-Season Sunrooms — Comfort and Flexibility
Three-season sunrooms bridge the gap between an open-air patio and a full four-season addition. They’re enclosed with aluminum framing and glass windows, allowing you to enjoy the space spring through fall — and sometimes even mild Texas winters.
The average cost for a three-season sunroom ranges from $20,000 to $60,000 in North Texas.
The price depends heavily on whether the structure is built on an existing deck or slab foundation and the type of glass used:
- Single-pane glass is the most affordable but offers limited insulation.
- Double-pane insulated glass costs more but keeps temperatures comfortable longer.
Why homeowners love them:
- More protection from the elements
- Versatile design styles (aluminum, vinyl, or hybrid)
- Lower maintenance than a patio enclosure
Typical features:
- Tempered glass windows with screens
- Insulated roof panels
- Ceiling fan or portable heater for extended use
Three-season rooms are perfect if you want more indoor comfort without the full cost of an HVAC-connected space.
Four-Season Sunrooms — Year-Round Luxury
A four-season sunroom is designed for year-round enjoyment, offering the comfort and insulation of a true home addition. These rooms are fully enclosed, insulated, and often integrated with your home’s heating and cooling system.
In North Texas, the cost to build a four-season sunroom typically ranges between $25,000 and $75,000, depending on design complexity, size, and material choices.
These sunrooms often feature:
- Thermally broken framing systems that prevent heat transfer
- Double-pane or low-E insulated glass
- Electrical upgrades for lighting, ceiling fans, and outlets
- Integrated HVAC or a mini-split system for climate control
The investment is higher, but so is the value — both for your comfort and your home’s resale appeal. A four-season room adds true square footage that can function as a dining area, home office, plant room, or relaxation retreat.
How Much Do Sunrooms Cost per Square Foot?
Sunrooms in North Texas generally cost $100 to $350 per square foot, depending on construction type, materials, and site conditions.
Here’s how that breaks down in practical terms:
- Screen rooms: $100–$150 per sq. ft.
- Three-season rooms: $150–$250 per sq. ft.
- Four-season rooms: $200–$350 per sq. ft.
While the per-square-foot method gives a quick estimate, remember that fixed costs like foundation work, electrical wiring, and permits can add several thousand dollars to any project — regardless of size.
What Does a 12×12 Sunroom Cost?
A 12×12 room (144 sq. ft.) is one of the most popular sizes for North Texas homeowners. It provides enough space for furniture, plants, and comfortable movement while keeping costs manageable.
Here’s what you can expect based on the type of room and existing structure:
- 12×12 Screen Room: $10,000 – $28,000
If you’re enclosing an existing covered patio or porch, expect costs toward the lower end. Starting from scratch with a new foundation and roof will place you at the higher end. - 12×12 Three-Season Room: $18,000 – $42,000
Aluminum-framed systems with insulated panels and double-pane glass fall in this range. Adding upgraded finishes like beadboard ceilings or decorative trim can raise the cost slightly. - 12×12 Four-Season Room: $25,000 – $50,000+
When you include full insulation, HVAC connections, and premium finishes, your sunroom becomes a true extension of your home — perfect for year-round relaxation.
Even modest-sized sunrooms can have a dramatic impact, adding light, usable living space, and connection to your backyard that few other home improvements can match.
Is It Cheaper to Build a Sunroom or a Full Home Addition?
If your goal is to add space to your home, you generally have two options:
- Traditional home addition (stick-built) — involves removing an exterior wall and constructing a fully integrated room with matching roofing, siding, and foundation.
- Prefabricated or custom sunroom — attaches to your home externally and is typically built from aluminum, vinyl, or hybrid materials.
A prefabricated sunroom usually costs about half the price of a traditional wood-framed addition. The reason is simple: prefab panels are manufactured off-site, reducing material waste, construction time, and labor.
Traditional additions, while more customizable, require full framing, insulation, drywall, and roofing — all of which add weeks to your timeline and tens of thousands to your budget.
So, which is right for you?
- Choose a sunroom if you want natural light, panoramic views, and lower costs.
- Choose a traditional addition if you need year-round conditioned space that seamlessly matches your existing architecture.
At MJB Interiors, we help homeowners explore both options so you can balance cost, comfort, and design.
What Factors Influence the Cost of a Sunroom?
Even within the same type of sunroom, prices can vary based on these elements:
- Foundation: Concrete slab vs. raised deck or piers
- Roof style: Gable, studio, or integrated tie-in
- Glass type: Single-pane, double-pane, or low-E insulated
- Framing material: Aluminum, vinyl, or wood
- Climate control: Adding HVAC or mini-split system
- Electrical: Outlets, lighting, and ceiling fans
- Permits and site prep: Soil grading, drainage, and foundation reinforcement
Understanding these cost drivers early allows you to prioritize features that matter most for your lifestyle and budget.
How to Plan Your Sunroom Addition
Adding a sunroom is one of the most rewarding ways to expand your living space — but it pays to plan carefully. Here’s a roadmap to get started:
- Define Your Goals
Decide how you’ll use the space. Will it be a morning coffee spot, plant room, home office, or family lounge? Your intended use determines whether a three-season or four-season design makes sense. - Determine Your Budget
Research local pricing and talk with trusted remodelers to confirm your cost range. Having a clear number in mind helps guide design decisions and prevent surprises. - Choose the Right Contractor
Look for a company experienced in both remodeling and structural additions. The best contractors handle design, permits, and construction in-house — ensuring everything ties smoothly into your existing home. - Plan for Year-Round Enjoyment
Even if you’re building a three-season space now, consider designing it so you can upgrade later with insulation or HVAC connections as your needs change.
Why Homeowners in Sherman and Denison Love Sunrooms
Sunrooms are among the most popular home additions in the Texoma area because they combine the beauty of outdoor living with the comfort of indoor amenities.
Key benefits include:
- Expands usable square footage
- Adds natural light and improves mood
- Creates a versatile space for entertaining or relaxing
- Boosts curb appeal and resale value
With North Texas weather offering plenty of sunshine and mild seasons, a sunroom lets you enjoy outdoor views all year without battling insects, wind, or heat.
Ready to Start Your Sunroom Project?
Setting a budget for your sunroom shouldn’t be overwhelming. With transparent pricing and a clear understanding of the factors involved, you can plan your addition with confidence.
Whether you want a screen room for summer evenings or a fully insulated four-season retreat, the MJB Interiors team can help design and build a space that fits your home, lifestyle, and budget.
Or explore our Portfolio and Gallery to see how we’ve helped homeowners across Sherman, Denison, and McKinney transform their homes with bright, inviting sunroom additions.
