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Want a convenient extension to your living space that can totally transform the look of your house? Get a 4 season sunroom built in your outdoor area. The best part about this type of sunroom is that regardless of the weather outside, you will be comfortably nestled inside. The seasons may change, but you can soak up nature’s beauty from your patio enclosure every day of the year! 

What is a 4 season sunroom?

A 4 season sunroom is a kind of sunroom addition that’s custom-designed and insulated in such a way that it heats and cools all-year-round as per your convenience. No matter if it’s chilly outside or scorching hot, you and your family can enjoy the room comfortably every season of the year.

Typically, it has high performing energy efficient glass windows throughout the room. The superior insulated glass helps reduce the loss of heat in the winters and prevents heat and ultraviolet rays from entering during summers.

This fully enclosed and climate-controlled patio room is built almost entirely of glass. As a result, you get ample sunshine and a view of the outdoors — making your 4 season sunroom one of the most comfortable and scenic rooms in your house.

What’s more, there is additional insulation in the walls, roof, and floor to help keep the heat in during winters. You can also install an HVAC unit for either heating or cooling purposes.

Want to Know the A-Z of Sunroom Windows? Take a look at our guide!

Beautiful sunroom
Photo by Joe Calhoun on flickr [CC BY-SA 2.0]

More advantages of a sunroom

  • An increase in your home’s value (by almost half of the cost of the room addition).
  • Extra living and entertainment space.
  • Outdoor enjoyment throughout the year.
  • Potential greenroom for your herbs, flowers, and container garden.

Costs to build a 4 season sunroom

When it comes to a 4 season sunroom, you can expect a total budget of $20,000 to $80,000 — averaging around $30,000. This translates to anything between $120 and $300 per square foot. 

The high range is due to the specialized materials and insulation. Here, the exterior walls, roof, windows, and doors have high insulation grades to retain heat and cool air during different seasons. 

Creating a budget for your project?

Explore financing options for your sunroom installation without affecting your credit score

Read more: Why getting a sunroom price estimate is crucial

Sunroom cost factors

Airy sunroom
Modern Design Inspired by the 1960s – Veranda Magazine, Photo by Thibault Jeanson on flickr CC0

There are various factors that affect the total cost to install a 4 season sunroom. This includes your sunroom design, roof type, where your new structure will be, additional sunroom features, your location, etc. 

For instance, if you live in an area that gets a lot of snow, your sunroom will need additional insulation and possibly a different structural design. Do check your local building codes and prescribed sunroom requirements. Getting a building permit will cost you anything between $400 and $2, 000

Let’s explore some of the cost factors. 

Sunroom placement: patio or deck

You can always build your sunroom onto an existing patio. It will save you considerable dollars. But, if you’re contemplating building a deck, you should be prepared to shell out $4,400 – $11,000. You may also need to consider the cost of constructing a concrete slab at an additional cost.

Site preparation

If you have to clear a part of your land and prepare it for construction, it will cost you between $1,400 and $4,400. Add to that a landscaping cost of $1,500 to $5,500. You may also need to factor in an excavation in case there’s a tree or a structure that you need to remove. That will be an additional $1,400 to $4, 800.

Size of the 4 season sunroom

A lot of your home renovation costs will depend on the size of your project. Since licensed contractors work by the hour, an increase in the size of your sunroom will mean an increase in labor costs. The cost to install a sunroom will range from $4,000 (for an 8’x10’ sunroom) to $20,000 (for a 12’x20’ sunroom).


Since a four-season sunroom requires effective insulation to maintain reasonable heating and cooling, you must be prepared to shell out a minimum of $1,000.

Roof type

Typically, roofing costs anything between $2,000 and $8,000. Of course, the amount depends on your structure, its size, and roofing material. It’s the choice of glass that makes a difference in your four-season room cost. Also, whether you select an all-glass roof or a framed roof with skylights — will have a bearing on the total expense. 

Windows and doors

All-glass sunroom
Image by Gregory Beaty from Pixabay CC0

Window installation will amount to around $15,000 for a fully insulated solarium. Casement windows with low-E, laminated, or tempered glazed glass and screens will be approximately $2500 for materials and $250 for labor. 

In a 4 season sunroom, a door is not compulsory but you can always install one if you want to make the transition between the indoors and outdoors more natural. A sliding glass door will range from $1,000 to $2,800. There are also other expensive door options such as French, telescoping, or folding doors.

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If you’re going to be watching TV in your sunroom, you will have to install electrical wiring. Needless to say, your cost will increase if you require an additional electrical panel box. You can hire a licensed electrician for $160 to $500 (at the rate of $50 to $100 per hour) and get the work done seamlessly.

Here are a few potential electrical additions for your sunroom:

  • Power outlet: $130 to $280
  • Ceiling fan: $150 to $360
  • Lighting fixture: $145 – $800

HVAC system

Adding heating and air conditioning in your sunroom will be between $300 and $6,000. In case you need to expand your existing ductwork, it will cost you in the range of $4,000 to $6,000 including installation. 

Labor costs

If you are constructing a four-season room on-site, this will mean hiring multiple contractors.

The average labor cost may vary based on location, the complexity of work, and the level of expertise. Having said that, here is an approximate price range for the various contractors:

  • Carpenter: $40 to $80 per hour
  • Electrician: $50 to $100 per hour
  • Painter: $20 to $40 per hour

Interior finishing

Your sunroom’s interior design and decor will cost you between $900 and $3,000. Add to it the cost of painting ($800 to $3,000), flooring ($1,600 to $4,500), and sunroom furniture

Read more: Sunroom flooring ideas: What works best for your home


A 4 season sunroom lets you bring the magnetism of nature inside your comfortably controlled indoor space during all four seasons of the year. Moreover, adding a sunroom will easily enhance the beauty and value of your home. It will add natural light and a spacious feel that will go perfectly with any style of the house. A bright place where you can gather your family and friends for game nights, get-togethers, parties, a tête-à-tête, or a quiet time alone.

How Much Does a 4 Season Sunroom Cost? was last modified: March 29th, 2021 by Ramona Sinha

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