Thomas Properties Group Inc. said its fourth quarter net loss decreased slightly as the Los Angeles real estate owner enjoyed improved revenue from its office properties.

The company late Thursday reported a net loss of $7.73 million (-30 cents per share), compared with a loss of $7.7 million (-33 cents) a year earlier. Total revenues rose 30 percent to $27.8 million, with after-tax cash flow quadrupling to $2.5 million.

“Last year was one of the most difficult ever for the real estate industry, and the impacts were felt across the board in all sectors,” said Chief Executive James A. Thomas in a news release. “Even in this environment, we were able to increase cash flow as evidenced by improvements in the fourth quarter, and we favorably restructured some of our debt and loan terms to better position our properties for the future.”

For the full year, the net loss was $21.6 million (-86 cents), nearly triple that in 2008, with revenue down 33 percent to $114 million.

Shares were up 4 cents, or 1.4 percent, to $2.94 in midday trading on the Nasdaq.