Firefighters and paramedics were dispatched at 11:05 a.m. Saturday to 1326 S. Comstock Avenue, according to Lyndsey Lantz of the Los Angeles Fire Department.
The victim, described as a 40-year-old man, was dangling in safety equipment about 25 feet off the ground.
Pole-to-house high-voltage wires were de-energized and confirmed safe by the Los Angeles Department of Water and Power prior to the rescue effort, according to the fire department.
"He will be assessed and transported to a hospital," said Lantz, who added that the tree trimmer was alert and oriented.