The current building was erected in 1725 by Karen Toller. The architectural style is classic baroque, with a high, hipped roof and a symmetrical ground plan. The hall in the cellar dates from the Old Bishop's Palace of the 13th century. The property was expropriated by the government for railway purposes in 1894, and in 1956 it transferred to the City of Oslo. The manor house is used as a museum and concert hall. The estate garden, which went almost down to the seafront during the late 1700s, was reconstructed and reopened in 1999 on the basis of a pattern from 1779.  
- Ola Storsletten. "Oslo ladegård". Store norske leksikon. Retrieved January 25, 2016.
- "Oslo Ladegård" (in Norwegian). Oslo Municipality. Retrieved 5 March 2009.
- Sprauten, Knut. "Karen Toller". In Helle, Knut. Norsk biografisk leksikon (in Norwegian). Oslo. Retrieved January 25, 2016.
- "Karen Toller". Store norske leksikon (in Norwegian). Oslo. Retrieved January 25, 2016.
- Gunnar Christie Wasberg. "ladegård". Store norske leksikon. Retrieved January 25, 2016.
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