Hi jack away!
Who do you buy your buildings from? I buy most of mine from Fat Dragon Games, who has stuff in an upcoming DCC, and some stuff from World Werks. Your castle and town looks like World Werks stuff.
All of the Castle PDFs came from Worldworks Games (the CastleWorks Ultimate and InteriorWorks : Castles and Keeps sets to be specific). There are a couple of props from other WWG sets and also a fair number of Dwarven Forge (more about them in a later post) props as well. Anyone not familiar with them should check them out at (hope this doesn't break a forum rule).http://www.worldworksgames.com
The village consisted of buildings from WWGs VillageWorks set as well as some buildings that used to be on free download from WoTC, but aren't available any longer. The trees and some of the fencing came from various ready made terrain suppliers.
The sewer system is largely from a WorldWorks Games set called Gothic Realms, modified by another WWG prodeuct called Missing Persons.
I noticed the Fat Dragon props in one of the recent DCCs. I haven't got any Fat Dragon PDFs myself, but I am sure they do good work as well.