Depends on your preconceptions on what fairies are.
The fey are a diverse range of spirits, from the spirits of rocks and trees, to the genii loci of place, house spirits, to those spirits that exist in the great below, Elphame, luminous Watchers, Old Gods, the hosts of the Dead, Goblins, etc.
Often chthonic, capable of malevolence turned up to 11, inhuman morality, operating on rules most care not bother with, and certainly not the tinkerbells of popular culture.
In essence, fairies can be just as pretty and nice, as they can be dangerous and hideous. Take the Slaugh (think a host of unbaptized evil shades that like to drop people from heights for fun), a red cap, or even the common goode folk (things like replacing your firstborn with a stick, to blighting your crops, or better yet, finding human suffer HYSTERICAL). Hell, I think demons, jinn, etc, are fairies by another name.
Plenty fairies can and do work indoors. Brownies, House Hobbs, Tomte are house spirits that can and do move in, though they are more like little helpers than workable entities.
You wanna learn about fairies? Go look at folklore. Skip all the new age stuff that likes the victorian romanticization that gave us the little tinkerbells we see everywhere. It's neither helpful, nor safe to rely on that stuff.
A great book I would recommend for familiar spirit alliances with fairies is an acedemic work; Cunning Folk and Familiar Spirits by Emma Wilby.