I would probably consider that if changing the door or the floor wasn't going to be a huge issue structurally, an issue with the landlords of the building, too much time or cost for my own company, etc. If it meant that there would be issues, I would have to explain to the person as kindly as possible that I needed to look for another applicant. This person might be very well qualified for the job, but that doesn't guarantee that I have all of the ability, money, or resources to change certain situations. It would be one of those unpleasant "sorry this is how life is sometimes" kind of situations.