Does it follow that the house has nothing in common with art and is architecture not to be included in the arts? Only a very small part of architecture belongs to art: the tomb and the monument. Everything else that fulfils a function is to be excluded from the domain of art.
The room has to be comfortable; the house has to look habitable.
The work of art is brought into the world without there being a need for it. The house satisfies a requirement. The work of art is responsible to none; the house is responsible to everyone. The work of art wants to draw people out of their state of comfort.
The house has to serve comfort. The work of art is revolutionary; the house is conservative.
The house has to please everyone, contrary to the work of art which does not. The work is a private matter for the artist. The house is not.