In the mid-1970s, a Mascoma Bank branch was located in West Lebanon on Interchange Drive, next to the current day McDonalds restaurant. The current West Lebanon branch was built in 1979 and opened in 1980, on the corner of Main and Tracy Streets, where Edson’s Bakery was established in 1890. The new building was constructed to help combat the energy crisis by using a passive solar building design. Concrete blocks, special windows, and wood heat were used to make things more energy efficient—the cost to heat the building the first winter was less than $1,000. The opening year of 1980 was the same year the bank first offered automatic-teller service.

In the 1980s, there was only one other bank in town: National Bank of Lebanon. By the end of the decade the competition had grown with Fleet Bank, Dartmouth Banking Company, and Connecticut River Bank on Main Street, and City Bank and Trust and BankEast on Route 12A. Deposits jumped from $9.6 million in 1966 to more than $100 million in 1985. Much of that growth mirrored that of Lebanon itself in the wake of the arrival of Interstate 89.