A Building Permit is not required to widen a driveway; however, zoning regulations and/or site plan control may impose restrictions on the width and location of a driveway.
Call 311 or submit a service request to initiate an investigation under the zoning bylaw if you suspect that someone has illegally widened their driveway.
If the driveway widening has only occurred on the lower portion of the driveway on City property, this is considered an encroachment: Bylaw enforcement - encroachments - on City property