How Much Do 4-Season Rooms Cost?

Compare quotes from up to four local home service companies, no sign-up required.
Get quotes


The four-season room is not exactly a room addition. Instead, it is a fully enclosed space with climate control; the majority of which is constructed of glass to allow maximum visual clarity. Today’s advanced quality materials not only ensure a weatherproof environment, they offer the ability to control the indoor air quality with maximum efficiency making the sunroom the kind of space one nearly never wants to leave.

Interior Of Modern Conservatory

Today you have options

Whether you call it a sunroom, a solarium, or a conservatory, the 3-season sunroom may be:

  • Built on-site requiring a foundation slab to be poured with post and beam construction, or
  • A completely prefabricated structure constructed off-site in a climate controlled facility and transported to the site.

In either case, on-site construction may involve demolition, site prep, and pouring a concrete foundation. For building on-site, next comes the framing, electrical and molding. The prefabricated unit may be built at the facility to meet your custom design specifications. Keep in mind this affects the basic cost. Ultimately, it is the choice of glass that makes the difference in your mostly glass four-season room. The impact and the enjoyment comes from having this direct engagement with the outdoor view while maintaining a comfortably controlled indoor climate. This is where it is important to choose the correct low-E clear tempered glass for your area.

Cost becomes a relative issue based on variables

Given the variables and designing to your specifications, the cost may vary tremendously. Taking your preferences into account, construction can range from the low $10,000 to $20,000 or as high as $72,000 to $98,000. Again, your area, the size of the unit, your design, and whether you select an all-glass roof or go with a framed roof with skylights all have a bearing on the expense involved.

The professionals do all the heavy lifting

There is the possibility of numerous contractors each performing their specialty of work, also dealing with the necessary permits and building codes for you. Determining cost relies upon the cost of materials and labor. To help, here is a rough idea of what contractors tend to charge for their labor:

  • Carpenters can charge on average $70 per hour
  • Electricians range somewhere between $65 and $85 per hour
  • Painters charge anywhere between $20 and $35 per hour

From the ground up, a rough base-estimate might be about $360 per square foot, keeping in mind the space is about 200 square feet, and this is for a basic plan. Casement windows with low-E, laminated or tempered glazed glass and screens average $2400 for materials and an average of $240 for labor. Large aluminum-clad venting skylights with screens run on average $425 each not including the cost for time and materials to construct the roof.

While prefabricated units can cost a little more than an on-site build, they provide all the state-of-the art materials and construction methods to provide a modern, modular patio room, sunroom, or conservatory often completed in less time than conventional construction. Start with getting estimates to help you decide on how you want to advance your plans. The more estimates you get, the better odds of getting the best price as well as learning just what you need to create the living space of your dreams.

Ready to get free quotes from local contractors?