of an admittedly earlier house( built c 1610).

It's called Aston Hall in Birmingham (see link below);I know it well because I worked there as a student for three summers doing research into the servants who were employed there.

This plan shows the house as it was remodelled in the late 18th century, and shows the uses of the rooms from 1820 when it was owned by James Watts’ son, who was alos called James.

Because the house fell into disrepair from 1841, it did not get remodelled to house extra servants in the Victorian/Edwardian era, as was the fate of so many country houses. Which makes it very useful for our purposes ;-)

I do apologise for the fuzziness of the plan: my fault entirely ,but I hope it gives you some idea.

To explain the plan:

From the top left wing we have the butlers room ( plus two extra small rooms presumably for his use).To the south of this is the grooms attic( with no fireplace note).

Then comes a servants attic, the Housekeepers attic and two maidservants rooms. One has neither fireplace or window ;-(.

But then there is the Green attic and the Yellow attic which were used by family members.

So- it is entirely possible that some of the Bertram family were housed on the attic floor in addition to Fanny. But I’ll bet Edmund had access to a fireplace ;-)
.
It is also entirely possible that Fanny did not have a fireplace in her bedroom as the plan of these attics shows.

If I can help with any more queries( and I do understand that the plan is not the clearest) please do not hesitate to ask.