under one roof

English

Idiom

under one roof

1. at the same location
   • 1888, The Popular Science Monthly‎^[1], volume 33, page 34:

     And as a further part of such a system, it is claimed that the farm must be devoted to a specialty, or a few specialties, on the ground that it would be almost as fatal to success to admit mixed farming, as it would be to attempt the production of several kinds of manufactures under one roof and establishment.

2. in one house, apartment, etc.

   Synonym: under the same roof

References

• “under one roof”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.