Councillor Grenville Chappel was born and brought up in the Penwerris Ward of Falmouth, one of four children. He attended Beacon School, Wellington Terrace School, and Falmouth Secondary Modern.
In 1964 he joined the Royal Navy as a Marine Engineer at H.M.S. Ganges, he completed over 24 years service leaving in 1988 as a Charge Chief Marine Artificer. After a short period of being a driver with Western National on the Penryn to Falmouth route he joined Bartlett Refrigeration. In 2000 he resigned to take up the post of Project Co-ordinator with the Beacon Community Regeneration Partnership, a charity based in the Penwerris Ward which he had helped set up.
During the time since returning to Falmouth he has been a Director of Carrick Housing and Cornwall Housing, and the Chairman of the District Forum of Tenants. In 2009 he became a Cornwall Councillor a position he held for four years and in 2013 became a Falmouth Town Councillor for the Penwerris Ward.
He married his wife June in 1972 and they have four children.