1918 A timber-clad house from Røssum in Kvam in Gudbrandsdalen is built for painter Gunnar Hjort, just outside the limits of the town of Lillehammer.
1919 Sigrid Undset rents the house from the painter, who wishes to move abroad. On the 27th of August she gives birth to her youngest son Hans Benedict.
1921 Sigrid Undset buys the house from Gunnar Hjort. She calls the place Bjerkebæk.
1922 Sigrid Undset extends the house, giving it a large veranda/gallery at the same time as she is converting the outhouse.
1923 Sigrid Undset advertises for an old house from Gudbransdal that she wishes to move to the place.
1924 The house dating from the 1700s from Dalseg in Sør-Fron is erected, and Sigrid Undset moves in at the end of November 1924. Following the separation from the painter Anders Castus Svarstad in October, she is now a single mother.
1930 She orders an exclusive bath, produced in America by Shanks, for her bedroom at Bjerkebæk.
1940 Sigrid Undset leaves Bjerkebæk and flees via Sweden, Russia and Japan to the USA together with Hans Benedict, her youngest son. Sigrid Undset’s housekeeper and her husband look after the house until the Germans come and occupy the house in February 1942. Sigrid Undset spends the war years in the USA as a “norsk informasjonssoldat” (Norwegian information soldier).
1942 The Germans occupy Bjerkebæk. In the USA Sigrid Undset, is chair of the organisation Fritt Norge (Free Norway) and a board member of Normannsforbundet (the union of Norwegians).
1945 Sigrid Undset returns to Norway and starts the work of recreating Bjerkebæk, which the Germans have devastated.
1946 Bjerkebæk and Sigrid Undset’s interest in flowers are presented in Alle Kvinner (a weekly magazine).
1947 Major renovation of Bjerkebæk.
1949 Sigrid Undset dies on the 10th of June and her son Hans Benedict inherits the place from his mother.
1952 Hans Benedict Undset Svarstad and Christianne nee Neraas move into Bjerkebæk following their marriage 30 June 1951. They extend the guest house and as time passes make it into a gallery for the works of Anders Castus Svarstad senior.
1974 Christianne Undset Svarstad writes to the Directorate for Cultural Heritage and suggests that the house and garden should be conserved as a tribute to Sigrid Undset.
1978 Hans Benedict Undset Svarstad dies 25 December in Spain. Christianne inherits Bjerkebæk.
1982 Bjerkebæk is conserved following a proposal by the Directorate for Cultural Heritage.
1996 Christianne Undset Svarstad dies and her two nieces inherit Bjerkebæk.
1997 The state, Oppland County Council and the municipality of Lillehammer buy Bjerkebæk, with the Ministry of Culture as the owner.
1999 - 2000 The restoration of the houses and work on the garden plan is carried out in cooperation with the conservation authorities.
2001 The restoration of Dalsegstua is completed. Planning of the public building commences.
2002 Carl Wiggo Hølmebakk wins the architectural competition for the design of the public building.
2004 The restoration of Røssumstua is completed. The finance for the public building is ready.
2005 The lower part of the garden is completed.
2006 Erection of the public building starts and the foundation stone is laid by Queen Sonja.
2007 The public building is handed over to Maihaugen. HM Queen Sonja attends the opening of Bjerkebæk with its public building on 20 May, Sigrid Undset's birthday.