Urban Jungle has a value-bundle deal going on over on Wargame Vault. Get all the terrain at once for your table. Makes it a lot easier that way.
From the copy:
These card stock models, once constructed, will give you a realistic three dimensional British urban town for your 28mm scale miniatures to play around! Ideal for any modern wargame (1950s – present and beyond). Whether its a stronghold during a zombie outbreak, invasion by Spatz-Natz on British soil or as a location on a street devolved into violence, you will find “The Urban Jungle Bundle” a a great addition to the tabletop.
These models are simple to construct and there are some basic instructions to help you build them.