Crews with the San Francisco Fire Department responded at 4:25 a.m. to 224 Sea Cliff Ave. on a report of a structure fire.
A firefighter had to be rescued after falling down an elevator shaft while working the fire. The fire department reported the firefighter was transported to a local hospital for evaluation and is expected be okay.
Crews were able to contain the blaze at 4:44 a.m.
There were no reports of civilian injuries and no residents were displaced due to the fire.
The cause of the fire remained under investigation Friday morning.