Regarding my case matusiak explained it would be very rare for a mouse to be inside an interior wall but as he questioned me further we hit on a possibility.
Scratching in attic middle of the night.
If you are hearing the noise predominantly in the middle of the night you almost certainly are sharing your home with rats or mice.
Information about noises in the attic scratching sounds at night scratching sounds in the attic or walls if you hear scratching or knocking sounds in your walls or attic then this is a pretty good indication that it will be a wild animal in your home.
Raccoons are notorious for making themselves comfy in your attic insulation.
The explanation is much simpler than an apparition in the attic.
Rats and mice can make quick scratching sounds at the door wall or close to the windows and even beside your bed.
Bats may form a colony in your attic but you ll hear them squeaking and scratching if they get stuck in the attic.
So scratching sounds in the attic at night could be from a number of different nocturnal animals.
Raccoons make very loud noises too.
Houses whether new or old make plenty of noise.
Ultimately an inspection of the attic will tell you what animal you ve got.
If the noises are only occurring during the day or at dusk and dawn check around the eaves for birds entering and leaving.
If you are hearing scratching noises specifically as well as scurrying sounds.
Scratching noise at night in the attic rodents.
Both mice and rats make scratching sounds in an attic.
They are also nocturnal animals and it is common to hear them running back and forth in the attic at night and scratching the ceiling boards.
You ll hear these pests more at night as they re looking.
Pitter patter noises that are very fast at night may signify the presence of rats or mice in the attic.
It could even be from the heating cooling system or branches of a nearby tree scraping against the roof.
Mice or rats are your likely culprit.
With rodents you ll usually hear them around bedtime and late at night.