Cost of Sunroom (Complete Guide 2023)

When it comes to enhancing your living space, the allure of a sunroom is undeniable. Whether you’re yearning for a cozy reading nook or a serene spot to soak up the changing seasons, a sunroom can be a transformative addition to your home. However, understanding the costs associated with this project is crucial for making an informed decision. In this comprehensive guide, we’ll delve into the various factors that influence the expense of building a sunroom, providing you with valuable insights to navigate this exciting endeavor.

Sunroom Costs Unveiled

A sunroom project encompasses a wide range of budgets, from the modest to the extravagant. The cost of a small, yet charming sunroom can start as low as $5,000, while a spacious, luxury sunroom could demand an investment of up to $140,000. The final price tag hinges on factors such as location, material expenses, and the desired size of the sunroom.

Low Cost: $5,000
Average Cost: $47,000
High Cost: $140,000

Price Per Square Foot

On average, the cost to build a sunroom hovers between $150 and $300 per square foot. This range reflects the diverse options available, ranging from three-season sunrooms to fully insulated four-season extensions. The type of sunroom you choose plays a pivotal role in determining the final price, with four-season rooms generally falling on the higher end of the spectrum, while three-season rooms and glass solariums tend to be more budget-friendly.

Sunroom Cost Factors

Delving deeper, several key factors contribute to the overall expense of a sunroom project. Let’s explore them:

  1. Size: Sunrooms offer a high degree of customization, ranging from 50 to 400 square feet. Expect to pay between $7,500 and $120,000, depending on your chosen dimensions. The existing structure and selected finishes can influence prices further.
  2. Permits & Insurance: Securing a building permit, a vital step in the process, typically costs between $400 and $1,500. This ensures compliance with building codes and insurance requirements.
  3. Site Preparation: Clearing land and preparing the construction site, especially if no existing foundation is available, can range from $500 to $5,600. Tree removal may add around $700 per tree, and land excavation can cost between $1,300 and $4,600.
  4. Foundation: Pouring a foundation for the sunroom comes with an estimated cost of $1,000 to $6,000, depending on square footage.
  5. Insulation: Expenses for insulation range between $500 and $1,500, contingent on materials and room size. Four-season rooms may require higher insulation costs for year-round comfort.
  6. Roofing: Installing a roof on the sunroom entails a cost of $3,600 to $8,500, determined by the type of structure and chosen roofing materials.
  7. Windows and Doors: Window installation, including labor, ranges from $3,500 to $15,000. Adding a patio door, facilitating direct access to your outdoor space, may cost an additional $1,300 to $11,000.
  8. Electricity: Professional electrical work, essential for wiring your new addition, may range from $160 to $525. Popular electrical features include outlets, ceiling fans, lighting fixtures, and home automation systems.
  9. Heating and Air Conditioning (HVAC) Systems: Installing HVAC systems can cost between $2,300 and $20,500. Factors such as expanding existing ductwork or opting for a ductless mini-split system influence the final expense.
  10. Interior Finishing: Finishes, including flooring and painting, can range from $200 to $9,000. Planning ahead can help you find budget-friendly options for furniture and decor.
  11. Cleanup and Landscaping: Cleanup costs, typically included in a contractor’s fee, may range from $280 to $670. Landscaping adds a final touch, with costs varying from $1,400 to $5,500.

Location Matters: Sunroom Costs Across U.S. Cities

The cost of building a sunroom varies based on your location. Here’s an overview of average cost ranges for different U.S. cities:

  • Los Angeles: $6,000 – $100,000
  • Albuquerque, NM: $6,000 – $75,000
  • Sioux Falls, SD: $2,500 – $110,000
  • Aurora, IL: $2,500 – $150,000
  • Cleveland, OH: $2,500 – $90,000
  • Atlanta: $2,500 – $90,210
  • Charlotte, NC: $2,500 – $80,000
  • Dallas: $2,500 – $80,000
  • Philadelphia: $2,500 – $120,000
  • Rochester, NY: $2,500 – $90,000
  • Portland, ME: $2,500 – $70,000

Types of Sunrooms

The type of sunroom you choose significantly impacts the final cost. Consider your usage needs and local climate when making this decision.

  • Four-Season Room: A fully insulated room usable year-round, with costs ranging from $25,000 to $80,000.
  • Three-Season Room: Less insulated, suited for warmer seasons, with costs between $10,000 and $40,000.
  • Glass Solarium: A room with glass walls and roof, offering a true outdoor connection. Expect costs between $30,000 and $75,000.
  • Conservatory or Garden Room: A enclosed greenhouse, with prices ranging from $5,000 to $80,000.
  • Atrium: An interior room with a glass roof, costing between $10,000 and $35,000.
  • Prefab Sunroom: Factory-manufactured structures with prices ranging from $5,500 to $30,000.

Conversions: From Porch to Sunroom

Converting existing spaces is a cost-effective approach. Transforming a porch to a sunroom typically costs between $8,000 and $50,000, while converting a deck can range from $20,000 to $100,000. Consider factors like reinforcing the structure and replacing flooring materials.

DIY vs. Hiring a Pro

While DIY may seem appealing, certain aspects like structural, electrical, and insulation work necessitate professional expertise. Local building codes may require a licensed contractor’s involvement. While there are DIY-friendly tasks, always prioritize safety and compliance.

Saving on Sunroom Costs

Getting creative with your sunroom project can lead to significant savings. Consider prefab designs, converting existing spaces, opting for smaller dimensions, or choosing a three-season room for reduced insulation needs. Compare estimates from multiple designers, explore DIY-friendly finishes, and align your sunroom with existing doors for convenience.

The ROI of a Sunroom: A Smart Investment

Despite the initial expense, a sunroom boasts an impressive 49% return on investment (ROI), enhancing your home’s value by half the cost of the addition. Whether integrated into a remodel or part of a new construction, a sunroom proves to be a savvy financial choice.


Building a sunroom offers a spectrum of possibilities, catering to various budgets and preferences. Armed with these insights, you can embark on your sunroom project with confidence, knowing that this addition holds the potential to enrich both your living space and property value.