I am subbing some work from another buulder right now. i have seen the whole project from start to finish. my estimate for the total cost was around one hundrend thousand dollars and that would be the high end. If i contracted the job I would have charged about 75,000.00 max. he charged over 150,000.00. i based costs off materials and labor cost with a reasonable mark up. Is there something im missing? Is there a way to bid off % of homes worth or how do people get their bids so high.