Sugar had no broken bones or cuts from the plunge, just bruising, after she fell an estimated 45-60m (150-200ft).
She was taken to vets at the Animal Rescue League, who say that when cats fall from such a height, they act like a flying squirrel - spreading their legs apart like wings.
This action may have saved Sugar from getting any serious injuries.
The owner was amazed that her cat survived and since the fall, a screen has been installed on the window that Sugar fell from.
source from: bbc.co.uk