The Children's Hospital of Orange County is naming its new seven-story tower after Orange County resident Bill Holmes.
Holmes recently pledged $27 million to the hospital, the most ever given by a living donor.
Hospital Foundation Vice President Graig Eastin called the gift transformational for the organization.
"Because of the size of the contribution, it will have lasting ramifications on the benefit that children in Orange County and the region will receive because of his investment," Eastin said.
Holmes made his fortune in the pool and spa business before retiring in 2004.
The "Bill Holmes Tower" will open in early February and will house, among other things, a pediatric emergency room with operating rooms, a laboratory, pathology and imaging services. The hospital has yet to decide how to use Holmes' donation.
The tower is set to open set its main campus in spring 2013.