You do not need an account with the Guelph Permit and Application System to see if a property has an active or historic building permit.
Open the Guelph Permit and Application System. From the landing page click Public search for permits and applications. Navigate to the property by zooming in on the map and selecting the desired property or use the Public Search fields. Any permits will be displayed under Results listing. You can refine your search for All or Active permits.