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David Olson
Founder, TheFatBook.com
David Olson founded TheFatBook and built its independent cost index: a Bill-of-Materials model that derives fair price ranges, true cost-to-deliver, and contractor margin from U.S. Bureau of Labor Statistics wages, Craftsman National Estimator labor hours, FRED material price indexes, and verified city permit fees. He designed the Bid Fairness Checker and True Cost Calculator and authors the per-city cost-index pages. Editorial guides are reviewed against the index for data accuracy.
How the data is built
Every number on TheFatBook traces back to a public source. See the methodology for the full derivation, or about for how the project is built and reviewed.