How Does Open Book Billing Work?
1) You will receive a Guaranteed Maximum Price (GMP) Estimate. This estimate will specify all work to be done and provide a cost estimate that will be the most you would have to pay at the end. (Note: Any subsequent changes, additions, abatement, or unforeseen conditions not specified in estimate may cause the cost to exceed the GMP estimate.)
2) Accurate records of material cost, subcontractor cost, and hours of labor during construction will be maintained by Piper Construction.
3) Upon completion of work you may be provided with copies of all receipts and records of hours worked.
4) You will be billed for actual material cost + actual hours worked + business overhead+ 20% coordination cost, not to exceed your original GMP Estimate.