What an amazing idea and twist. Solid overview which I appreciate lets the GM knows exactly whats going on in one solid short summary. Love the reward being the house for this adventure and I could see this fitting in really well into a campain where you want to give the party a home to live out of. Awesome Work!

I see dead people. Interesting premise.

Good job.

I love the overall premise. Your layout is good, and I liked you way of calling out GM only information. I don't think your clues actually point to the PCs in the direction you want them to go. 

The mystery at the center of this haunted house is a lot of fun! I could see this being a really solid early adventure in a campaign, establishing a base of operations. You could plop this down anywhere in pretty much any setting.

A delightfully haunted house with creative foes, clever solutions, and a willy-wonka style 'test' that fits well with the theme. I wonder if patterns of layout or sub-headings could help make the haunted rooms easier to scan at the table.