Plumbing and HVAC rules in Nebraska

Nebraska has no state plumbing license. Cities such as Omaha, Lincoln and Grand Island license master and journeyman plumbers, and all contractors register with the Nebraska Department of Labor.^{1, 2, 3}

Omaha and Lincoln license heating and cooling work locally. Nebraska's Department of Labor registers contractors, but that registration isn't a competency license.^{4, 3}

Nebraska has no statewide plumbing code: a city or village without its own plumbing ordinance defaults to the 2018 Uniform Plumbing Code, except for single-family homes and farm and ranch buildings.⁵

Nebraska has no statewide plumbing code, and the default plumbing code for towns without their own doesn't cover single-family homes, so permit rules are local.⁵

If your home has a backflow preventer, your water utility can tell you whether it needs testing and who can test it.