This brings some fun plot hooks.
An evil druid awakens a houseplant or pet using maximized awaken and it starts to kill people using animate objects (it takes levels in wizard). At first, the deaths look like suicides or accidents, someone falls down the stairs, "hangs" themself, or dies in their sleep.
If someone gets suspicious, "ghosts" begin to manifest and seem to be the issue.
The PC's try to exorcize the "haunted house" but even though the "ghosts" leave the deaths still continue.
Once the house is abandoned for good, the druid takes the pet/plant to another home to begin the cycle again.
The PC's will probably not figure out what's going on until the second or third house they get called to.