City of Louisville, CO
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Applicable Building Codes for Single-Family New Construction for Properties Damaged or Destroyed by Marshall Fire
- 2018 IRC - International Residential Code Fire Sprinklers no longer required, see below for more information
Louisville Amendments to 2018 IRC
- 2020 NEC - National Electric Code
- Energy Code - see below for more information
- Option 1: Residential 2018 IECC Prescriptive Code
- Option 2: Residential 2021 IECC Prescriptive Code or HERS Rating of 50
- Option 3: Residential 2021 IECC with Appendix RC
See the Design Criteria for the requirements for each option.
Updated October 6, 2022
To change your energy code path for a permit already issued, the items below are required to be submitted as a permitted revision:
To change to the 2021 IECC Prescriptive Code
- Provide a letter stating the intended updated changes at time of submittal
- Provide an updated Manual JDS on site
To change to the 2021 IECC HERs Rating
- Provide a letter stating the intended updated changes at time of submittal
- Provide updated HERs report at time of submittal
- Provide updated Manual JDS on site
To change to the 2021 IECC Zero Energy Appendix RC
- Provide a letter stating the intended updated changes
- Provide updated drawings reflecting the changes
- Provide a report from a RESNET rater demonstrating ERI of 47 before onsite power production and final ERI of 0 after onsite power production is installed
- Provide updated Manual JDS on site
City Council approved Ordinance 1825 on April 5, 2022, which allows homeowners who certify financial hardship due to inadequate insurance coverage to meet the previously adopted 2018 International Energy Conservation Code (IECC), with amendments, or the 2021 IECC without Appendix RC. City Council also approved Ordinance 1826 which removed the requirement for residential fire sprinklers city-wide. These ordinances have an effective date of May 10.
On May 3, 2022, City Council approved Ordinance 1828 which allows homeowners who select Option 1 or Option 2 above to only install 1 EV Capable space.