Typically customers prefer a lump sum estimate , in which we generate a detailed scope narrative outlining and explaining exactly what work we will perform . For unknown costs ( such as tile and plumbing fixtures ) we will provide a reasonable allowance to account for this in your estimate . We go through great lengths to produce an accurate estimate . Our goal is to avoid change orders and we typically succeed .
Another method is a cost plus fee estimate . We provide a line item, detailed estimate . This allows us to start quicker as we can begin with some “ unknowns” and continue to add work as it is done . The drawback with this approach is so many undetermined factors mean no price cap , which makes some clients uneasy . The plus side is you pay raw costs with no mark up ! you pay a flat percentage fee !