I can't find any useful inspirational photos for the Housekeeper's room. This one has the basic notions though:
I am working with a fairly small room, so her fireplace will be small and plain. This was a period when mantelpieces hadn't really come into their own and it wasn't usual to have things placed on them. This is a reasonable representation of a simple fireplace and hearth.
She has the huge linen cupboard which I showed you in a previous post (under lock and key) taking up the whole of the back wall but she will need the basic things like a comfortable armchair, a very small desk and chair and a small table and chair. The two chairs can be used at the table for any meals she may want to take away from the other servants or with a visitor. She will also have a rug. Old one from the house of course.
Only in large houses was a housekeeper's room strictly hers; generally it was shared with the lady's maid and other senior members of staff who needed a quiet space now and then and certainly all the senior staff would have eaten there and not in the servants hall.
Dalton House is a modest house and this is a small room and, in this house, it is strictly Mrs Dallow's room to do with as she wants. Some compensation for having to be Cook and Housekeeper.