Iron County, UT Noise Ordinances: Construction Hours (2026)

Section 8.20.060(D)(3) singles out construction sites in residential zones: performing or causing construction work between 10 p.m. and 7 a.m. in a way that is plainly audible at 20 feet from the source is prima facie evidence of a violation of the county's general noise nuisance standard in subsection A. The Iron County board of county commissioners may authorize extended hours for construction operations that by their nature require continuous work, or may modify or waive the nighttime cutoff for projects in generally isolated areas where extended hours will not affect adjoining property occupants, so a contractor working overnight on an isolated parcel should apply to the commission rather than assume the exemption applies automatically.

Outside the prima facie window, subsection C's nine factors (noise level, ambient conditions, proximity to sleeping facilities, zoning, time, duration, and recurrence) still govern whether daytime construction noise crosses into a nuisance. Relief requests under subsection F go to the board of county commissioners, and any conditions granted must be followed or the relief is revoked. Enforcement follows the rest of Chapter 8.20, including the no-prior-notice rule in subsection G.