

Protecting the sunroom from rain and snow runoff is the first consideration, and there are systems such as Trex RainEscape that are designed for the task.
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How to Build an Under-Deck Sunroom in 5 Steps

Allow several weeks to two months for the job to be completed. Most under-deck sunrooms are custom-designed and installed by professionals.
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Will the sunroom be built from the ground up, including a new deck? Will it be added under an existing deck?Īn experienced DIYer might install a basic off-the-shelf sunroom in one or two weeks if there are no changes to the deck or its support structure. The construction timeline depends on how much living area the sunroom will add and the project scope. How Long Does It Take to Build a Sunroom Under a Deck? In fact, adding a sunroom ranks higher than many other home improvements, with a 50 to 70 percent return on your investment. You might use your new sunroom as a TV or game room or as a place to grow plants or keep pets.īecause a sunroom adds functionality and living space to your home, it increases its value.

Also, because sunrooms are 70 to 80 percent glass, they’re the next best thing to an outdoor living space without the drawbacks of a screen room.Ī sunroom also brings more natural light into your house, making the space feel larger. The new addition will give you a place to gather with family and friends when the rain, wind, or cold keeps you off your deck. The biggest advantage of an under-deck sunroom is your enjoyment. What Are the Benefits of Building a Sunroom Under a Deck? After receiving the initial bids, this will require some discussion with each builder. When seeking a builder, homeowners should get at least three bids and make sure their scope is identical. But, of course, a DIY-installed, prefabricated sunroom will cost much less. The cost of an under-deck sunroom addition depends on how big the new sunroom will be, what design and features you select, and whether you hire a builder or make it a DIY project.Īssuming a square-footage cost of $150 to $300 ($1,615 to $3,230 per square meter), a basic 10- by 12-foot (3- by 3.7-meter) sunroom will cost $18,000 to $36,000, depending on whether it’s a three- or four-season room. How Much Does It Cost to Build a Sunroom Under a Deck? The only question is which design and construction methods will suit the site best: An inexpensive prefab structure or a customized four-season addition? Whatever your choice, follow these steps to plan and build an under-deck sunroom. If your home has a second-story deck, or if you plan to build one, there’s space below it for a sunroom, also called a solarium.
