The Ames rule
From the City's Permitting and Inspections page (read 23 October 2026):
| Job | Permit? | The City's wording |
|---|---|---|
| Water heater replacement | Yes, plumbing permit and inspection | "Water heater replacements ... require permitting and inspections!" |
| Sump pump installation | Yes | Same sentence |
| Clearing a stoppage or fixing a leak | No, unless valves, pipes or fixtures are replaced or rearranged | Plumbing exemptions |
| Replacing a defective concealed pipe | Yes | Counts as new work |
| Gas piping to the heater | Yes, mechanical and gas work | "Permits are required for most mechanical and gas work" |
Gas water heaters also carry gas and venting work, which the City treats as mechanical; ask Inspections (515-239-5153) whether your swap needs a mechanical permit as well.
Who can pull it
The City says "Homeowners can apply for permits for any projects on their primary residence." Owners cannot pull permits for registered rental properties, where plumbing "must be done by a licensed contractor". Contractors must be "licensed with the Department of Inspections, Appeals, & Licensing", registered with the State, and carry at least $500,000 in general liability insurance; the State's PMSB contractor license also requires a master of record and a $5,000 bond.
The inspection
The City lists a water heater inspection among its plumbing inspections, due "After the installation is complete", and it needs only 2 hours' notice, against 24 hours for most others. Inspections run Monday to Friday; request one on 515-239-5153, by email to inspections@cityofames.org, or in the City's portal.
How to apply
- Open the City's Citizen Self Service portal (EnerGov).
- Apply for a residential plumbing permit for the water heater and pay; the portal has a fee estimator.
- Install, then request the water heater inspection with 2 hours' notice.
What it costs
From Appendix U of the Ames Municipal Code, effective 1 July 2026 (2026-27 Appendix Fee Changes):
| Plumbing fee, existing 1- and 2-family homes | Amount |
|---|---|
| Basic fee (in addition to the items below) | $56.23 |
| Water heater and/or vent | $2.84 |
| Each plumbing fixture, trap or appurtenance | $2.84 |
| Reinspection of defective work | $56.23 |
| Mechanical: each appliance vent (if charged separately) | $6.25 |
| Mechanical: each gas-piping outlet | $4.25 |
So a straight swap is $59.07, and a failed inspection almost doubles it. Installed prices are in water heater replacement cost; Ames trade permits carry no job value.
What 1,578 Ames water heater permits show
| Measure | Ames water heaters |
|---|---|
| Permits on homes, October 2023 to September 2026 | 1,578 |
| Firms | 49 |
| Firms with a permit in the last 12 months of the file | 37 |
| Share held by the five busiest | 73.8% |
| Usual days from issue to final | 2 |
| Busiest / quietest month | July (144) / August (73) |
Water heater permits in Ames close in a usual 2 days, the fastest of any trade in our Ames file, so an install whose permit is still open a week later has missed its inspection. Five firms hold 73.8% of the work; in the last 12 months the busiest were C and K Inc (133 permits), Draintech (131) and One Hour Heating & Air (66).
See every Ames water heater installer by days to final →
Related
Compare firms on the Ames water heater list and the Ames plumber list; check a license with the Ames contractor license lookup. Furnace and AC rules: Ames HVAC permit. Past permits on your address: Ames building permit search. Other cities' rules: do I need a permit for a water heater; the checklist: hiring a plumber. Monthly counts: Ames permit statistics.
What this does not tell you
We do not show a finished share for Ames, because almost every older permit passes final. Ames trade permits carry no job value, and Iowa publishes no bulk license file, so no license status is shown. The City's pages block automated reading, so they were read through a page reader; the portal's fee estimator is the final word.
How we know this
Permit, homeowner, licensing and inspection rules are quoted from the City of Ames's Permitting and Inspections page, and fees from Appendix U of the Ames Municipal Code (2026-27, effective 1 July 2026), read 23 October 2026; the $59.07 total is our arithmetic. Counts are City of Ames residential water heater permits, October 2023 to September 2026; days run from issue to the City's final date.
Numbers come from City of Ames residential permits (one record per permit), data through October 16, 2026. Nobody paid to be on this page and nobody can.
Questions
- Do I need a permit to replace a water heater in Ames?
Yes. The City's permitting page says 'Water heater replacements and sump pump installations require permitting and inspections!' The water heater inspection is due after the installation is complete.
- How much is a water heater permit in Ames?
Under Appendix U, in effect from 1 July 2026, the basic plumbing fee for an existing home is $56.23 plus $2.84 for the water heater and/or vent, so $59.07. A reinspection is another $56.23.
- Can I replace my own water heater in Ames?
Yes, on your own primary residence: the City says homeowners can apply for permits for any project there. Not on a registered rental, where plumbing must be done by a licensed contractor.
- How long does a water heater permit take in Ames?
The City asks for only 2 hours' notice for a water heater inspection, and the usual Ames water heater permit in our file reached final 2 days after issue.
- Who licenses plumbers in Ames?
The State. The City says all plumbing contractors must be licensed with the Iowa Department of Inspections, Appeals, and Licensing, registered with the state, and carry at least $500,000 of general liability insurance.
Build your own list
Every firm with that kind of permit on record. Pick what you value. The list moves.
Related guides
- Ames building permit search: how to look up permits on an address
- Do I need a water heater permit in Bellevue, WA? Gas vs electric, emergencies, and one firm with most of the permits
- Boulder SmartRegs: the 100-point rental efficiency standard, who is exempt, and hiring for the upgrades
- Do I need a permit to replace a water heater in Boulder? Yes, a mechanical permit, and half never pass final
- Do I need a remodel permit in Baltimore? Yes for any renovation: what's exempt, inspections, 11,434 permits
- Do I need a permit to build a house in Charleston, SC? What the City asks for, flood certificates and 1,142 permits
For one city
- Ames contractor license lookup: Iowa registration, electrical and PMSB licenses, and the City permits
- Ames Smart Energy rebates in 2026: heat pumps, heat pump water heaters, AC and solar from Ames Electric Services
- Do I need an HVAC permit in Ames? Yes: what is exempt, homeowner permits, the $56.23 base fee and inspections
- Permitting and Inspections — City of Ames (accessed 2026-10-23)
- Appendix U: Plumbing, Mechanical, Electric and Other Building Permit Fees (2026-27) — Ames Municipal Code (accessed 2026-10-23)
- 2026-27 Appendix Fee Changes — City of Ames (accessed 2026-10-23)
- City of Ames EnerGov SelfService permit portal (2026-10-23)
- PMSB Contractor License — Iowa DIAL (2026-10-23)