About Us

> About Us

Since 2003 Great River Brokers and their construction partner, Cornerstone Builders have been providing homes and sun porches. Now adding Sun Space of Lake City to their mix, they are able to provide a larger selection  of comfortable, attractive, well-constructed sunrooms, three-season rooms, all-season rooms, and screen rooms—all at affordable prices. We pride ourselves on our customer service, and we’re proud of the fact that over 75% of our new business comes from referrals. To satisfy our customers’ needs we provide service after the sale and maintain a fully stocked warehouse including spare parts, panels, and hardware so you can get back to enjoying your sunroom as soon as possible.

By approaching every project with professionalism, craftsmanship, dependability and the highest levels of quality control, Sunspace of Lake City ensures that your sunroom or windows will be a worry-free experience from start to finish. You can feel confident in knowing that we have sold and installed over 1000 sunrooms and porch enclosures, and that our installation teams arrive on time, complete the job on schedule, and that we keep the project on budget. Sunspace of Lake City is state licensed and fully insured.

Located in Lake City, Minnesota our installers service a 150-mile radius.

Don Grundman

Over 35 years experience in the sunrooms and porch enclosures business.