Firefighters took 15 minutes to bring a fire under control at a single-story housing structure for the Coast Guard in Aina Haina.
The building was unoccupied at the time and no injuries were reported, said Honolulu Fire Department spokesman Capt. Kevin Mokulehua.
The Fire Department took three minutes to arrive at the fire reported at 10:36 a.m. today and used firefighting foam to suppress the flames and protect neighboring structures.
The cause of the fire and its damage was under investigation.