What Mechanical Square Footage Costs Plumbing Contractors on the Back End

Last spring, a plumber I work with in Charlotte sent me a bid packet where the GC had already penciled in mechanical at a flat rate per square foot, based on a cost book that was, best I could tell, at least five years old. The house was 5,200 square feet, three-and-a-half baths, a recirculation loop, and a slab that had already been poured over a rough-in the previous plumber walked away from [1].

Sources

1. pmmag.com · What Mechanical Square Footage Costs Plumbing Contractors on the Back End Sep 5, 2026

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