The woman, 38, said after the accident that she had stalled her car while parking at lunchtime on Monday in Las Tablas, in the north of Madrid.
She became confused and put her foot on the gas, sending her car shooting through the second-storey wall. It landed roof-down on two vehicles parked in the street.
Witnesses shared photos of the accident on social media:
Spanish daily El Mundo reported that the driver was only lightly injured thanks to her car's airbag and that firefighters despatched to the scene were not needed to free her.
She was treated for an anxiety attack by paramedics then later taken to hospital for precautionary examinations.