Admiral:
Very good points, RedRaven!
Perry Miniatures have a plastic mud-brick house in store which might be useful:
To fill out with more stuff for inspiration:
Check out Babylon 3D:
These reed huts should be quite easy to make in miniature form, and could be used as Hobgoblin dwellings. Ma’dan reed huts, looking pretty much as they did during Sumerian times:
Also, check out The_Penguin’s stuff. Fantastic details, not least the houses. At the moment of writing, many images including those of WIP houses appear to be down.
Add step crenellations, skulls, skinned slave, chains, torches, braziers, spikes, Chaos stars, Daemon faces, general metal, fire and ash, bull god idols and the usual Warhammer suspect details, and you could have a nice CD dwelling.