In order to comment on or object to a planning application, you need to know what constitute valid grounds for objection, and how best to put a letter of objection together. One of the best guides to the subject is freely available on the internet here and is recommended reading for anyone considering commenting on an application.
Comments can be posted to South Hams District Council, Follaton House, Plymouth Road, Totnes TQ9 5NE; or they can be emailed to customer.services@southhams.gov.uk; or they can be uploaded directly on to the South Hams website by following the instructions here.
In addition, sending a copy to any member of your Parish Council will ensure your comments are noted and discussed at Parish level, and this will be reflected in the Parish Council’s own response to the application.