Bundesimmobiliengesellschaft m.b.H or BIG is a quasi-governmental company in Austria, which manages Austrian publicly owned real estate.

[8] BIG is the central provider of space for several public sector functions such as schools, universities, prisons, courts and police stations.

[1] The sole owner of BIG is the Republic of Austria,[1] and the company's activities cannot be considered separate from government policy.

[1] Unlike other companies close to the Austrian government, BIG acts on the free real estate market,[12] but its business activities are restricted to the Republic of Austria.

[1] The Austrian government is dependent on BIG, since it has a de facto monopoly on special-purpose buildings such as educational facilities and prisons.