there are books and tools out there for you to use to get the info that general contractors and subcontractors know and use.one such book or tool is called the home remodel estimator book.this tool gives you the sq ft prices for just about any rehab or new build category you r looking for.you can buy a book for just about any state as each state is going to have their own price range.for instance if you are looking for a roof sq ft price it will break down the job as follows1[rip out per sq ft 2] framing if needed 3]plywood per sq ft at 7/16 or 1/2 " or 3/4" whatever size you need a price on then felt paper per sq ft etc. it is a VERY handy tool for estimating yourself. you can also use it to double check your contractor or just to familiar yourself with the building or rehab process.
excavation,concrete,plumbing,electrical,framing,insulation,sheetrock,flooring, roofing every category you need. there is also a "means" estimator book you can ask for at a lumder yard or bookstore or on the internet.
hope this helps LOVE TO BUILD
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