During the 19th century, the farms began to change from growing grain to raising dairy cattle. By 1856 there were enough dairy farmers for a dairy to open in Alchenflüh. A warehouse was built two years later in 1858. The Burgdorf-Solothurn railroad opened a station in the municipality in 1876. The municipality grew slowly until 1965, when the A1 motorway was built between the two villages. The motorway brought new businesses and commuters to the municipality. Three new housing developments were built to house to growing population. New school buildings were built in 1969-70, 1989 and in 2006 and a kindergarten opened in 1987-88. Before the 1960s there was some industry in the municipality, including a gravel quarry and a printing factory. These were joined after 1969 by a machine factory, a distribution center for Emmi Käse AG, a regional potato storage station, and the Conforama and Pfister furniture factories. The Lyssach-Alchenflüh shopping center was built along the motorway and is shared between the two communities. A proposed merger with Kirchberg was rejected by the latter in a vote in 1973.