Austin Bostic, of Ashburn, is believed to have set the fires around 2:30 p.m. on April 5, 2023 on Thistledown Terrace, the county fire marshal's office said.
He was charged with burning or destroying a dwelling and setting fire to woods, fences, grass, and more, officials said.
He was held at the Loudoun County Adult Detention Center.
Click here to follow Daily Voice Woodbridge and receive free news updates.