Custom St. Louis Sunrooms

Bring the beauty of the outdoors inside with a custom sunroom from California Custom Decks. Enjoy more natural light, cool breezes, and a stunning view you won’t get from any other room in the house!


At California Custom Decks we build custom sunrooms exclusively in the St. Louis area, so we understand what it takes to build quality sunrooms that complement your home’s unique design and bring the beauty of nature indoors.

Screen Rooms

Offering a great balance between nature and indoor living, screen rooms are the most popular room addition we find people opting for because of its uniqueness. You won’t find another space like it in your entire home so it offers new and exciting space. You’ll feel the breezes, avoid the bugs and enjoy relaxing and entertaining all summer long.

California Custom Decks retractable screen room with open deck and fireplace
Screen Sunroom St Louis
Trex Transcend Spiced Rum Decking Signature Railing Screen Room Under Deck Black Column Wraps
Zuri Screen Room with Fireplace Open Deck with Grill

Three-Season Sunrooms

Unlike screen sunrooms that offer minimal protection from the cold, three season sunrooms can extend the seasons, which in the St. Louis area, can mean something different to everyone. The other “secret” benefit we hear back from our customers is how clean the rooms remain throughout the area, as the dust and pollen are kept out. Enjoy great views and excellent entertainment possibilities throughout the mild weather seasons.


Check out the video of our demonstration of the Eze-Breeze™ Sliding 3-Season Panels located in the showroom!

Sunroom St Louis

Four-Season Rooms

The ultimate in flexibility and comfort, four season sunrooms offer relaxation and enjoyment throughout the year, including the bitter cold winter months in the St. Louis area. Your four season sunroom will quickly become your favorite room in the house, perfect for watching the snow fall, the flowers and trees bloom or the changing leaves in Autumn.

Four Season Sunroom
Four Season Sunroom
Four Season Sunroom

Custom Sunrooms Built for Your St. Louis Home

Our sunrooms are extremely diverse because of the variety of distinct homes in the St. Louis area. Most folks want their new addition to be a part of their home and look like it belongs, so our sunrooms start from the ground up when planning. Each one is custom planned, not a one-size-fits-all kit, and offers tremendous value at a lower price when compared to other alternatives. While the concept and components of all sunrooms are similar, the actual choices for flooring, wall systems, ceiling finishes, roof styles, colors, finishes, and so on all vary, resulting in a diverse collection of possibilities.

California Custom Decks retractable screen room with open deck and fireplace

More About Us

At California Custom Decks we are innovators in deck design. We opened our doors in 1990 in St. Louis, MO and are leaders in custom deck and sunroom construction and renovation. We service areas in St. Louis like Ballwin, Chesterfield, Creve Coeur, Kirkwood, Webster Groves and Wildwood.


Every little component of your California Custom Decks space counts. Our team only uses the best materials to create the space of your dreams. We guarantee that you’ll be well-informed about every part of your outdoor living project. It’s part of our proven process.



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How much does it cost to build a sunroom? Whether it’s a screen room or a four season sunroom, we have a gallery of ideas with price ranges for you to get started on planning your sunroom project!

Need more inspiration? View our gallery for more Sunroom ideas!