You’ve been craving more light, more space, more ease—but you’re not sure if a sunroom is worth it. You’ve googled sunroom cost and landed in a sea of vague numbers and prefab options that feel nothing like your home.
You want something tailored. Beautiful. Built to last. And you’re not interested in a room that only works half the year. If you’re asking what a sunroom really costs—and what it’s worth—you’re asking the right questions. Let’s break down the real numbers, benefits, and what it takes to do it right.
What Is a Sunroom?
A sunroom is a light-filled living space designed to bring the outdoors in—without giving up comfort, climate control, or everyday usability.
It’s a home addition that, when designed thoughtfully, a sunroom becomes a natural extension of your home: a place to read, recharge, entertain, or enjoy a quiet morning without stepping outside.
Types of Sunrooms (With Costs)
Not all sunrooms are created equal. The type you choose will directly affect both the feel of the space and your overall investment. Below are the most common styles, along with typical cost ranges to help you understand what’s possible.
Three-Season Sunroom | $30,000–$60,000+
Designed for spring, summer, and fall use, these rooms are not fully insulated or connected to your home’s HVAC.
Four-Season Sunroom | $60,000–$120,000+
Built with full insulation, double-pane windows, and climate control, this option allows year-round use and seamless daily living.
Solarium | $70,000–$150,000+
Walls and roof are made primarily of glass, maximizing sunlight and views. These require precise planning to manage heat, privacy, and structural integrity.
Custom Sunroom Addition | $100,000–$200,000+
Fully integrated into your home’s architecture with tailored design, finishes, and functionality. Ideal for those seeking a refined, forever space.
11 Factors That Affect the Cost of a Sunroom
The final investment depends on how the space is built, what it’s made from, and how well it’s integrated into your home. Here’s what truly shapes the cost of a sunroom:
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Size of the Sunroom
Larger footprints naturally require more materials, labor, and structural planning. But it’s not just about square footage—it’s about how the room flows with your home.
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Site Preparation
Before building begins, we assess the land, grade, and accessibility. Excavation, leveling, and clearing can all impact overall cost and timeline.
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Foundation
A solid base is essential for long-term stability. Slab, crawl space, or full foundation—each has a different price point and purpose.
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Insulation
Even three-season sunrooms benefit from thoughtful insulation, especially in transitional months. The better the envelope, the more usable the room.
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Sunroom Materials Used
Framing choices (wood, vinyl, or aluminum) influence both aesthetics and price. We guide clients toward materials that complement their home and perform well over time.
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Sunroom Window and Glass Choices
From energy-efficient glass to oversized panes, window selections affect everything from light levels to climate control—and they come with varied costs.
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Heating and Air Conditioning (HVAC) Systems
While not always included in a three-season sunroom, optional ductless mini-splits or radiant flooring can elevate comfort and extend the room’s use.
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Interior Finishing
Flooring, trim, ceiling treatments, and built-ins bring the space to life. These are the details that make a sunroom feel like part of the home—not an afterthought.
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Cleanup
Post-construction cleanup isn’t just a courtesy—it’s part of the full-service experience. We leave your space spotless and ready to enjoy.
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Landscaping
A well-designed sunroom looks intentional from every angle. Landscaping around the new structure completes the vision and increases curb appeal.
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Permits and Insurance
As a licensed contractor, we handle all the necessary permits and liability coverage, so you don’t have to worry about compliance or surprises.
Benefits of Building a Sunroom
You start your mornings here. Coffee in hand, light pouring in, the stillness of the outdoors just a pane of glass away. It’s where you take a breath, find your rhythm, and reconnect with what matters. A sunroom is a thoughtful extension of how you want to live.
Natural Light That Supports Your Well-Being
Sunlight is more than a design feature. It supports mood regulation, circadian rhythms, and a sense of calm. We design sunrooms that intentionally invite in light, without the glare, heat, or seasonal discomfort.
Space That Adapts to You
Our clients use their sunrooms as yoga spaces, reading lounges, entertaining areas, or quiet places to reset. Because every space is custom-built, we align the layout, finishes, and flow with how you actually want to use it.
A Closer Connection to Nature
Whether your sunroom faces a wooded ravine or a peaceful garden, we orient every view to feel grounded and restorative. Large-format windows and carefully selected materials create a true sense of place, without stepping outside.
A Long-Term Investment in Your Lifestyle
Sunrooms increase usable square footage, improve daily life, and add measurable home value. Sunrooms often increase the cost by 4-8%. But most of all, they help you slow down and savor the space you’re in.
Sunroom Costs: Frequently Asked Questions
How much does a 20×20 sunroom cost?
A 20×20 sunroom addition typically costs between $60,000 and $120,000, depending on the materials, foundation, and interior finishes. Larger sunrooms with custom details, like a glass roof or climate control, will fall on the higher end of that range.
How much is a 12×12 sunroom?
For a smaller sunroom addition, like a 12×12 build, you can expect costs to range from $30,000 to $60,000. Factors like site prep, insulation, and building codes will influence the final cost.
How much should I budget for a sunroom?
Budget $100 to $300 per square foot for a sunroom addition that’s customized to your lifestyle. If you’re dreaming of a refined, light-filled space that supports daily living, consider investing in materials and design that reflect the quality of your home.
Is it cheaper to build a sunroom or an extension?
In most cases, a sunroom costs less than a full home extension. However, your budget depends on the scope of the project and how you plan to use the space. For clients looking to create their dream sunroom—complete with elegant finishes and seasonal comfort—costs can be comparable to those of a full addition.
Create the Sunroom of Your Dreams With Ron Scott Design Build
Sunrooms That Support the Way You Want To Live
We believe your home should restore you. From the sunlight you sit in to the way a room opens up to nature, every element shapes how you feel. That’s why our sunrooms aren’t cookie-cutter—they’re crafted with intention, beauty, and longevity in mind.
- True Color Expert + Certified Medical Intuitive on Staff: We understand how light and hue affect mood, focus, and comfort.
- CLIPP-Certified Design: We design for all seasons of life—offering peace of mind now and later.
- Holistic Interiors, Built to Last: Every decision—from layout to finish—is tailored to your wellbeing.
- Amish Craftsmanship + Custom Detailing: We don’t just install. We build heirloom-quality additions that feel like they’ve always belonged.
Building a custom sunroom should feel as thoughtful as the space itself. That’s why we partner with professional contractors and master craftspeople—ensuring every detail is carried out with care, clarity, and craftsmanship. Book your consultation today.
Disclaimer: Pricing estimates are subject to change based on market conditions, inflation, and annual cost fluctuations. For the most accurate and up-to-date pricing, please contact us directly.
Scott Veatch is a seasoned remodeling expert who has been transforming homes and businesses since 1988, bringing visionary design to luxury residences and commercial spaces. He is a NARI-certified remodeling professional and a Certified Living-In-Place Professional (CLIPP), and he has even served in leadership roles on industry committees to advance best practices.