It could be that the house next door had a hidden history. Maybe it was once the site of a tragic accident or a crime that was long forgotten, and then something triggered the recurrence of strange events. For example, renovations might have unearthed something from the past, leading to the screams.
The 'Suburban Screams' about the house next door might be due to a natural but disturbing phenomenon. There could be a large number of rodents or other pests in the house. Their movement and activities could be creating noises that sound like screams. Also, the structure of the house itself could be to blame. Old plumbing or a faulty ventilation system might be making noises that are being misconstrued as screams. It's also possible that a person living there had a sleep disorder like night terrors, which would cause them to scream in their sleep without being fully aware of it.