I'm not sure what the statue was made of, but it was very big and impressive. I was very glad to see it because I was walking from city center of Nottingham and went through a very barren looking industrial and warehouse district and was pretty sure I was lost before finally turning a corner and seeing the giant Space Marine. I knew I had found GWHQ.
I'm sure it would look nice on your lawn, but you'd have to have a pretty big porch to set it on.