Harry Kim, the mayor of Hawaii County, confirmed the destroyed buildings, including one home, Friday morning.
"It is more than just a loss of a home," Kim said at a news conference Friday.
"We all have to understand how traumatic it is for the people being affected," he said.
The lava has also caused damage to a subdivision road and some heavily forested private property.
Talmadge Magno, Civil Defense administrator, said "nothing came of" the earthquake, though four or five landslides damaged the coastline and one road was shut down in the area. Magno said some buildings had "minor" damage.
Magno also said a fifth "vent" had opened up following the earthquake, spewing lava onto another local road.
At least 1,800 people were ordered to evacuate the area near the volcano. Kim said Friday that all eruptions so far have been concentrated in the southern area.
Hawaii Gov. David Ige said in a statement he's activated the state's National Guard "to provide support to county emergency response personnel to help with evacuations and security." He's also signed an emergency proclamation to help provide state money for "quick and efficient relief."
The Kilauea volcano began erupting around 4:45 p.m. local time Thursday, according to the U.S. Geological Survey.