Make a Medieval Cottage a bit Steampunk?

I have had quite a dilemma over terrain developing in my head over the last few months since I bought In Her Majesty's Name and decided I'd like to have a go at playing it.

I have loads of medieval terrain, buildings but nothing even vaguely "Victorian", and while I was away I did some rough sketches of what I could do to alter the look of the cottages without having to do too much work and without actually altering the models I have irreparably.

I came up with all sorts of plans for the general look of play but also some specific ideas for the buildings. Here is the first tweak: