James Ennos, the deputy construction and dredging manager for the project, said the repairs were needed after inspections raised safety concerns.
“These works will allow us to replace deteriorated timber using responsibly sourced materials,” he said.
“The Ha’penny Pier is an important historic asset for Harwich and its visitors.”
Once again, the public have been told they can still use the foot ferry, the Deck 1853 restaurant and the visitor centre.
The latest repairs are estimated to cost £115,000 and the authority hopes to be finished by the end of March.