Mountgarrett's Cottage, Woolmers Estate. Constructed for Dr Mountgarrett in the 1820s and later moved to Woolmers, where it was used for agricultural purposes.
I wasn't going to post this one as the photos are poor quality, but because the building hasn't been maintained/restored as a residence, the construction details can be seen.
The cottage consists of two rooms. The main one through the front door, which has had large double doors added at the back to allow access to the machinery, and a smaller room to the side.
Door to second room. Detail from wall below.