The current codes adopted by the Town are the 2006 International Codes.

To review the complete Johnstown adoption and amendments to the codes, click here. To review the individual code amendments, click on the code abbreviation below.

Click here for some of the significant changes to the 2006 IRC

Colorado House Bill 09-1091 requires carbon monoxide alarms to be install in residential properties.

Click here for more information.

Adopted Codes effective October 18, 2008
  • 2006 International Residential Code - IRC
  • 2006 International Building Code - IBC
  • 2006 International Mechanical Code - IMC
  • 2006 International Fuel Gas Code - IFGC
  • 2006 International Plumbing Code - IPC
  • 2006 International Energy Conservation Code - IECC
  • 2006 International Fire Code - IFC
  • 2008 National Electric Code - NEC
  • 1997 Uniform Code for the Abatement of Dangerous Buildings - UCADB
Design Criteria

effective 10-18-08
Basic Wind Speed
90 mph 3 second gust
Ground Snow Load  
30 psf
Seismic Design Category  
Winter Design Temperature  

Ice Shield Underlayment Required  
Air Freezing Index  
Mean Annual Temperature  
Subject to Damage from Weathering  
Subject to Damage from Frost Depth  
Subject to Damage from Termite Damage  
Slight to moderate
Subject to Damage from Decay  
Foundation Design
All foundation systems shall be engineered foundations designed by a Colorado licensed engineer or Architect. The engineered foundation shall be based upon a soils analysis for the specific location where the foundation is to be installed.
Exception: IRC detached accessory buildings may have a foundation system approved by the building official.