This is the upstairs half story as it was when we bought the place. It was a seasonal space, perhaps used as a workshop or for storage. In Phase II of our remodel, we put in a large shed dormer (shed dormers are flat so allow more head room than a gabled dormer), transforming this space entirely. What you're looking at is the east side of the house.
Here is that same east end after the new dormer went in. Notice all the extra floor space to the right of the stairs. The framing you see is the beginning formation of the office. The threshold to the office is dictated by the massive support beam that had to be lifted by crane into our roof line and what will support the large dormer addition. Where the threshold of the office stands, provides the resting place for the beam above it. Ditto for the other side of the room where the bathroom was created.
After paint and new hardwood flooring throughout upstairs.
We had to disassemble the old desk (another Great Great Grandparent piece) due to its weight and size. But once reassembled, it fit quite well in the new space.
The office is mostly used by me as Hubby has an office at work. My collection of antique gold frames rests against the wall waiting for the right piece of art.
The gabled portion of the room offers enough head room for storage.