The City of Grinnell is currently under the following building codes:
- 2015 International Building Code
- 2015 International Residential Code
- 2015 International Existing Building Code
- 2015 International Fire Code
- 2020 National Electric Code
- 2018 International Mechanical Code
- 2018 Uniform Plumbing Code
- 2012 International Energy Conservation Code
- 2010 ADA Standards
- 2015 IRC Shingle and Ice Barrier Requirements