EQC will still assess land damage as land is not covered by private insurance policies.
Vero executive general manager of claims, Jimmy Higgins, said the agreement would simplify and speed up the claims handling process for its customers.
"Vero is highly experienced in disaster management, and this new process will allow us to provide an end-to-end claims service to our customers," Higgins said.
"This streamlined approach to handling claims is one of the many learnings to come out of the Canterbury earthquakes, and we are committed to showing the difference this will make to our customers, knowing they only have to deal with us, and that we'll look after them."
The private companies will be reimbursed by EQC for their share of the insurance costs following the settlement of the claims.