What is my In Game Name? fade_123 Am I a constructor? Yes How do I get to this? /plotme home:2 fade_123
You have a nice start here and i'm sure that you can improve it a lot. That is what I can tell you from viewing the pictures. So if you want the rank for sure go and add detail and design that pulls us into the building. Eye candy is the key.
A suggestion from a fellow designer: The Top looks a bit empty, you might want to try adding a second, possible third layer. Smaller than the previous layer. It could add that touch and make it a real fortress. Like Dzyriq said.
Here is the problem - you built a giant box over flat ground - you have no details... even your own house has rooms, and floors, and trees outside, and good lighting everywhere - a castle should too. I agree with Dzy. Denied.