Hamre Church has, by all accounts been one of the four main churches in Horda County in the Middle Ages. Hamre was a main church for the whole of Hordaland. Timber remains in the present church show that there was a stave church here in medieval times.
On Christmas Day 1795, at 5 a.m., the lightning struck the church in Hosanger. After three hours, the timbered church from the 1600s, which had replaced the stave church from the Middle Ages, was in ashes. Already on New Years Day in 1796, a sermon was held for the Hosanger population in the main church at Hamre, to which the congregation belonged earlier,
Around Mjøsvågen here is still a compact marine use area. Some of the buildings are common boathouses, but most of them also house small enterprises and workshops. This is where the farmers from Øvsthus, Mjøs, Hole and other farms have supplemented their meagre incomes as smiths, brass moulders, clog makers, chest builders and decorative painters.
Valestrand became a centre for the tanning industry in Osterøy; one of the old crafts that has developed into a local industry with many places of work. From the 1870s ever more ventures were started. Many of the large sea houses we see today around the bay have been places for tanning and leather enterprises.