By my logic. If living beings have a soul or spirit, why can't an in-animate object?
- In my experience with Energy Manipulation, you can manipulate the energy or spirit from anything in the world - and things not of this world.
As for aura's, If an aura is by my interpretation, something that protects a spirit or soul. And using logic, that objects can have energy/spirits/souls - then it is possible.
However, in my experience houses or building in-particular can hold memories and fragments of energy/spirits. There's a theory on flash memory, that houses can hold onto the spiritual or emotional aspects of an event.
Sorry, I'm rambling. I believe that houses/building don't have an aura as such - but a version of it. I couldn't tell you anything more - i've not be researching for a number of years, but I hope this helps.
Love and Light,