The incident happened Thursday in Kissimmee when Carmen Roman said a minivan careened off the road and struck her home.
Roman said initially she thought someone was parking near her house.
"All the sudden he just, 'boom!' Hit my house," she told FOX35.
When Roman stepped out of her home to check on the driver, she said the man was unresponsive behind the wheel with "no pulse, no heartbeat."
Surveillance video from her home shows Roman beginning to give the man chest compressions.
“I gave him 30 compressions," she told FOX35. "A couple of seconds after [I started] he came back alive."
Later in the surveillance video, the man can be seen walking after getting out of the wreck. The incident is under investigation by police.
“It feels awesome. My kids are so proud, they’re like ‘Momma’s a hero!’” Roman told FOX35. “If I’m in the moment, and I know I can do something, I will react. Like I said, I just love to help people."