Eventually hearing her cries, neighbours contacted the emergency services, who hauled her out with a rope.
It is believed the woman fell into a disused well.
Operations Officer Paul Carrigg said: "This was a very unusual incident.
"Fortunately the lady has escaped without injury though she was obviously shaken up."
He added: "We have doorknocked all residents in the street and advised them to stay indoors until council engineers investigate further."
A sinkhole is essentially any hole in the ground created by erosion and the drainage of water. They can be just a few feet across or large enough to swallow whole buildings.
- The Independent