Storage above stairs

[xyz123]

Hi- considering that most of the PHers live in mega mansions this may be unusual question.

We r struggling for storage space in house and was thinking about having a largish storage cupboard built in space about stairs (standard 3 bed semi house and I am talking about stairs from hallway to upstairs.. hope this make sense). I am not talking about storing all the gold bars in the house but just bedding and quilts mainly....

I haven't actually seen one done ever and not sure if this is feasible, any downsides (other than losing ceiling clearance maybe and how will it look)
Thanks