South Shore Bank and Braintree Cooperative Bank yesterday received regulatory and legal approval to merge operations under the South Shore Bank name.

“Together, our banks have built a reputation for service, integrity and trust for generations,” Jim Dunphy, president and CEO of South Shore Bank, said in a statement. “Our combined expertise, resources and offerings will set the standard for community banking in the South Shore and beyond.”

The deal was announced in July.

Dunphy is the merged bank’s CEO, and Braintree Cooperative Bank’s President and CEO Paul M. Pecci is now president of the expanded company. Members of both banks’ management teams retain senior roles and all employees will continue to have jobs at the combined institution.

Braintree Co-operative Bank has two branches in Braintree, as well as a loan center. South Shore Bank has 16 branches in Quincy, Weymouth, Stoughton, Pembroke, Norwell, East Bridgewater, Hingham and Braintree.

Both Braintree Cooperative Bank locations will remain open and transition to the South Shore Bank name when the client conversion happens in early 2018.

Pecci in July said the combined bank will not renew the lease at South Shore Bank’s Braintree location, consolidating that business into the two current Braintree Co-operative locations.

With Braintree’s roughly $257 million in assets and South Shore’s $1.06 billion in assets as of Sept. 30, the expanded bank is now up to about $1.31 billion in total assets, according to call reports.