Bauhaus was an art school in Germany famous for its revolutionary approach to design. The philosophy was to unite the traditional arts, therefore painting, sculpture, architecture and design, with industrial technology, to produce work that harmonized design and function, aesthetics and utility.
Simply put objects had to be functional first but also beautiful.
Bauhaus was a reaction to the heavily ornamented design which was common in the early 1900s and therefore it is typically characterised by a deliberate lack of ornamentation and an emphasis on simplicity, symmetry and sleek clean lines.
Although, modernist and ultra-contemporary may be true Bauhaus, there's no reason why you cannot use the Bauhaus concept of well-made, beautiful, but always functional, when thinking of décor solutions for your home retaining your own unique style and taste.
There's no reason why even a country home can't be Bauhaus by utilising the core ideas of Bauhaus. It's simply about what works best for you, in your situation, and in your space by wisely using resources and getting everything out of the design that you can.