Another hidden cost is literally hidden behind the wall. We recently completed a kitchen remodel where we were 99.9% sure that we would not need a structural beam. We even went and get the engineer to tell us that we are ok to proceed. Client pays the deposit, work started and what do you know! We need a beam. We had to pause the job, get new plans, re-file the Job, which of course had an additional cost to the Job. Point is, you never know the craziness that are hidden behind your walls, which can only be discovered after demolition.
It does not have to be a structural beam as in this case. It can be hidden pipes, duct work, termites, rot, mold or just about anything that’s not done up to code or is damaged and needs replacement. Just plan for the unknown. It’s better if you have it set aside in your mind or better yet in your budget, than rather be caught off guard without it.
Comes in all forms and versions from any sort of situations like natural disasters to man-made. Delays should be accounted for in your budget as well. Yes, it does cost. It could cost you, especially if you are moving into your home from a rental or from a house you haven’t sold as yet, so you are caught paying double mortgages. You can be caught paying additional storage for items that should have already been delivered and the list can go on. It happens more often than you think so put a pin there and plan in for some delays.