An architect gets the job and is placed in a cabin I believe. As he begins to work on his blueprints many strange things begin to happen to him through the night. Finding piss on his blueprints one morning, and later someone comes in and breaks his toe in the night...

This wouldn't be the Secret Window would it?

No, this would have to be older. The memory I have is very vague. Secret window is like a mind twist thriller. This is a thriller, but involves someone else coming after this man trying to take away this job opportunity.

Living in Peril (http://www.imdb.com/title/tt0119555/)