Water Heater Replacement in Arvada, CO

Do I need a city permit to swap my heater in Arvada?

Yes. Arvada Building Services requires a Residential Plumbing permit and an inspection to replace a domestic water heater. The city also counts a change of 5% or more in BTU rating as a modification, which matters if you're moving to a bigger or smaller gas unit. Contractors registered with the city apply online through Arvada Permits, while homeowners who do their own work apply in person at City Hall, 8101 Ralston Road. Questions go to 720-898-7620.

Will Arvada's water be hard on a new tank?

Less than in many suburbs. Arvada treats its own water at the Ralston and Arvada plants, drawing on Denver Water's North System and Clear Creek, and its 2026 report shows average hardness of about 43 ppm and 65 ppm at the two plants. That is on the soft side, so heavy scale is less of a worry here than in harder-water towns. Draining a few gallons from the tank each year still helps clear whatever sediment does collect. A few pockets of the city get water from other districts, such as Consolidated Mutual or Ralston Valley, so check your bill if you're unsure who serves you.

What should I expect in an older Arvada house?

Arvada grew fast after World War II. Census survey figures put the median year built at 1979, with about 52.5% of homes built before 1980. In houses that age, plumbers often find a flue that needs new sections, an old gas connector, or a closet sized for a smaller tank. None of that stops a replacement, but it can add parts and time, so ask for those items to be listed in the quote. Xcel Energy supplies gas in Arvada; if you notice a gas smell, get outside first, then call 911 and Xcel at 1-800-895-2999.

A note on timing

Because Arvada requires an inspection, plan for the plumber to install the heater and then schedule the city's visit. Keep the permit card handy until the inspector signs off. If the old tank is leaking right now, close the cold water valve above it and switch off the gas or breaker before help arrives.