A San Diego-based hotel company has sold three of its all-suites hotels, including one in Sorrento Mesa, to an affiliate of Hyatt Hotels Corp.

The $76.5 million sale by The Hardage Group in San Diego included a 142-room hotel in Orange County, a 234-room property in Emeryville in the San Francisco Bay Area, and the 194-room Sorrento Mesa hotel.

Each of the hotels will be re-branded as Hyatt Summerfield Suites hotels, which are upscale, residential-style hotels. Hyatt plans to invest $15 million toward renovating all three properties.

Samuel Hardage, founder of Chase Suite and Woodfin Hotels, said the hotels were sold to help pay off $110 million in debt that was coming due. He explained that hey were among a total of eight hotels that had been refinanced in 2006 as part of a $110 million securitized debt deal. Two other properties also were sold in the last year, he said, and three of the eight were retained.