Updated: May 29, 2026
Location
Address
Grinnell, IA, 50112
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Duane Neff Plumber
Duane Neff at Grinnell, IA 50112, held a Plumber license (#EL002512MB) with the Iowa contractors license board with an expiration date of 12-25-2008. We last verified the license was expired on 05-28-2026.
Their BuildZoom score is 0 because we haven’t been able to verify an active license. As a result, they’re not ranked in the top 50% of 39,764 Iowa contractors.
If you’re thinking about hiring them, we recommend double-checking their license status with your local licensing authority. Alternatively, use our project planner to be easily matched to qualified, licensed professionals in your area.
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Duane Neff License info
Inactive License
| License # | EL002512MB |
| Status | Inactive |
| State | Iowa |
| Type | Class B |
- According to the Iowa Department of Public Safety, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Duane Neff at the Iowa Department of Public Safety.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 9424 |
| Status | Inactive |
| State | Iowa |
| Type | Hydronics, Hvac/R, Plumbing |
- According to the Iowa Department of Public Health, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Duane Neff at the Iowa Department of Public Health.
This is a sample of licensing data; click here to access a complete history.
ALERT*
BuildZoom Score
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- *No active license on file. If you are Duane Neff, click “This is My Business” to update your information.