home office
US /ˈhoʊm ˌɔː.fɪs/
UK /ˈhoʊm ˌɔː.fɪs/

1.
a room in someone's house that is used for working in
:
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I spend most of my day working in my home office.
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Our new house has a dedicated home office space.
2.
a government department in the UK that deals with internal affairs, such as law and order, immigration, and security
:
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The new immigration policy was announced by the Home Office.
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Security matters fall under the jurisdiction of the Home Office.