Initially the robes were from Gryffindor because I made the costume as a Halloween display for my workplace, and red was the most recognizable of the houses. Now that it's mine again, though, I get to be whichever house I want ^_^ So I ripped out the red lining and replaced it with blue. The front and hood are fully lined, but I skipped lining the sleeves because I didn't have enough fabric :(
The sweater and skirt were also made by me, but the dress shirt was store-bought. My house tie isn't the licensed version, but I think it does a good job regardless.
I'm still in the process of making my wand, but other than that, the costume is complete - I just need an excuse to wear it!