modular space manufacturer
A company that makes modular units, e.g. shipping containers, used in buildings of modular construction.
A modular space manufacturer is a company that manufactures modular units employed in construction, whether intended for building use or some other original purpose, e.g. all-purpose shipping containers. In some cases these may be used in permanent structures, but they are more commonly used in container buildings.
The supplied product is a modular unit used in construction. Its original purpose can be building accommodation or another use, so a shipping container can retain a manufacturer distinct from the company that later adapts it for a building.
The manufacture of the unit is separate from the assembly of several units into a structure. Permanent use is included; the association with container buildings does not make temporary installation a condition of the definition.