Fast Installation, Quality Work

By choosing C-Thru Sunrooms, you can not only count on high-performance materials, top-quality designs, innovative technology, and durability to last you decades, but you can also count on C-Thru’s commitment to our customers, which is why our sunroom additions are completely customizable and fast to install. We’ve been transforming the sunroom space with innovation and convenience since 1947. So when you need quality and flexible design for your budget along with a fast installation, trust the experts at C-Thru to provide the perfect sunroom solution.

Fast, Affordable Sunroom Addition Installation

Each of our customizable sunroom additions is fully designed and fabricated by us, using our industry-leading computer design technology. This eliminates design flaws and guarantees that our sunrooms are of the highest quality and able to withstand the toughest weather elements. With over seventy years in the business, you can take us at our word that your sunroom will be:

  • Energy Efficient: Our sunrooms are optimized to stay cool in the summer and warm in the winter, so you’ll save on energy bills—and save the environment too.
  • Professionally Installed: Our installation partners are professionals who have been factory-trained to provide you with the fastest, most thorough sunroom addition installation available.
  • Hassle-free: While other sunroom additions may take weeks to install, our sunrooms take only days to build on site, properly integrating into your home with little disruption to your regular routine.

Contact Us About the Leading Sunroom Installation Across the Country

No need to wait any longer to enjoy that lovely sunlight—choose C-Thru and start enjoying your expertly engineered and designed sunroom in a matter of days! Contact our friendly representatives and discover why we have the leading sunroom installation across the country. Give us a call to speak to one of our experts, or simply fill out our easy online form for more information now.

In Home Estimates

Only Certified Trained Estimators "Not Salesmen" will leave with you Multiple Free Estimates, Brochures, Design Layouts and Answer All of Your Questions. One of our preferred estimators can perform a in home estimate 7 Days a Week for your convenience & take roughly 15 to 40 Minutes to complete.

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12 Special Financing Programs Available

20% Off Installations

FREE Factory Room Upgrades

15% Off All Rooms

  • Manufactured in California - 100's of Combinations
  • Transferable Lifetime Factory Warranty - 100% Guaranteed Work - Financing Available
  • Installation from one of our prefered contractors is available in 5 Southern California Counties:
  • Los Angeles, Riverside, San Diego, Orange County, San Bernardino