The picture comes from a haunter in Columbus, Ohio, who goes by the name Eerie on HalloweenForum. You can see some of his construction pictures on ImageShack as well as in the albums he's posted on the forums. The crazy thing is, the gothic archway to his house was built a second time with a different design, which you can see in his albums. I also like the welcome sign to his haunt.
Added thoughts. I have to thank the great Pumpkinrot for reminding me about Eerie's excellent work. While I had run across his talent last year on the forums, I had forgotten about it until 'rot posted some pictures on his own blog. That necessitated me going back and admiring the talent -- and equally awe-inspiring workshop -- that Eerie has.