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How Much Do Four-Season Rooms Cost?

Interior Of Modern Conservatory

The four-season room is not exactly a room addition. Instead, it is a fully enclosed and climate-controlled space. It’s constructed almost entirely of glass, which allows for ample sunshine and an enhanced view of the outdoors. The advanced quality materials of today’s four-season rooms do more than simply ensure a weatherproof environment. They also allow you to control your indoor air quality with maximum efficiency, making a sunroom one of the most comfortable and scenic rooms of your home.

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How can you add a four-season room to your home?

Whether you call it a sunroom, a solarium, or a conservatory, you can add a 4-season room to your home in one of two ways:

  • Build it on-site, which requires a foundation slab to be poured with post and beam construction
  • Add a completely prefabricated structure—which is constructed off-site in a climate controlled facility—and have it transported to your home.

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 specification—just keep in mind that personalized design will, of course, affect the basic cost.

Cost of a four-season room is dependent on design factors

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 range, 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 a framed roof with skylights all have a bearing on the expense involved.

Ultimately, it is the choice of glass that makes the difference in your 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.


How much do contractors charge for building a new four-season room?

If you choose to have your four-season room built on-site, this will mean hiring a contractor—or possibly even multiple contractors—which will result in necessary permits and building codes. Determining the cost of working with contractors will rely upon the cost of materials and labor. Here is a rough idea of what contractors tend to charge for their labor—just keep in mind that the averages vary based on location, complexity of project, and level of experience:

From the ground up, a rough-base estimate could be between $120 and $300 per square foot. 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—and are often completed in less time than conventional construction. Start with getting estimates to help you decide how you want to advance your plans. The more estimates you get, the better your odds of getting the best price. Plus, you’ll have the added and invaluable bonus of learning just what you need to create the living space of your dreams.

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