Complex sentence: Janeaway allows him to stay but eventually has to turf him out fearing even more trouble from the police over his hiring an illegal, so the house becomes a shambles of half-completed reconstruction, reflecting its owner's own disordered state of mind.
Split into simpler sentences: Janeaway allows him to stay but eventually has to turf him out, fearing even more trouble from the police over his hiring an illegal. So the house become a shambles of half-completed reconstruction, reflecting its owner's own disordered state of mind.