Hello, I’m making this for a Blender Battles challenge which has a few days left, but I can’t work on it after tomorrow, so your crits are important within the next 20 hours. 
Blender internal, 1 sun light, with AO.
Thats great, but maby put a path leading up to the steps as it looks empty without a path,and maby enhance the ridges eg.
,thats all i can say, i love the texturing 
If you already used a nor map on the brick walls make it have more effect, otherwise make a nor map for the brick walls. (It doesn’t really looks like it has a nor map)
I agree with that there should be a path of some sort.
The grass should have more grass… 
perhaps some dirt maps to make the castle look more real.
perhaps also make a roof or a drain along the walls in the outer left and right of the image.
It is a very good start but for my opinion some thing should be tweaked a bit.
The windows look bad.
The castle needs a door.
The bricks in the wall are too perfect, they need a bit of erosion. I know this is hard to achieve in a short time.
Work a bit on the lighting - it is flat and uninspiring now.
Thanks for the help. Here’s a small update before I get some sleep.
thats better but still no path, i know i may be only a newbie but a path would make all the difference, but still far better than what i could do! 
this looks very nice Wiggie,what are those holes in the windows sides?
Interesting model - what reference are you working from? Also, all this talk of a path, you don’t have to have a ‘path’ per se, but you do need something. Generally castles were built not only as a living place, but also as a fortification, so you’re pretty much at liberty to put a moat, a defensive ditch, rocks, greatspears, an old rusting iron portcullis, anything you like. What you have is kind of stylized…homogenous work, but interesting nonetheless. I would think about taking your ‘windows’ though and either making them Arrow slits, or reworking them with Iron bars to intimate a more ‘defensive’ feel to the place. All the castles that I’ve ever been to proved one thing to me: Iron and Stone go together like Arm & Hammer.
Hope this helps, and keep up the good work, as it’s much better than anything I can currently acheive
Taladan
I would put a low intensity light pointing the other direction. Those shadowed areas just don’t look right as black voids.
-Obiwan
Thanks again for all the help everyone, I’m calling it finished for now.
The reason there’s no door or iron bars, etc, is because it’s a modern castle and my source (from google) was pretty much the same.
I’m not very happy with it yet, but I’ve done as much as I can for now.
The windows are much better now, the grass is better but the light is still too harsh. A great progress so far.
Great work, like the stones