The buildings are a slightly large 15mm, or perhaps even 20mm. The scale isn't exactly constant, but at £2 each I couldn't resist.
There were four different types in the shop, so I got a mixture of six. They all come with a little light inside (easily removed) and some tasteful people and animals standing outside which simply snap off. Here's some pictures of them with a Peter Pig figure outside for comparison.
|"Mini House with Balcony"|
With a layer of paint and a bit of basing I think they'll do fine for generic modern era European buildings.
The shop still had a few left. Might leave it a week to see if they cut the price some more!