Current Energy Code Status
| Residential | Commercial | |
|---|---|---|
| Current State Code | 2021 IECC | 2021 IECC and ASHRAE 90.1-2019 |
| State Amendments | Yes | Yes |
| Equivalent Code* | 2009 IECC | 90.1-2019 |
| Amendments Efficiency Impact (Compared to Model Adopted Code) |
-11.20% | 3.10% |
| Effective Date | ||
| Enforcement | Mandatory Statewide | Mandatory Statewide |
| Can use COMcheck / Rescheck | Yes | Yes |
*Equivalent Code is based on a quantitative analysis of the state code with amendments as displayed in the Residential and Commercial Status of State Energy Code Maps.
State Certifications
Federal law directs states to review and update their building energy codes regarding energy efficiency and submit related certifications. The following is the most recent certification submitted by the state.
States are required by statute to submit certifications within 2 years of the publication of an affirmative determination of a new model energy code. Learn more about the statutory requirements.
Most Recent Submitted Certification
- Residential: None
- Commercial: None
Model Energy Code Impacts
Key metrics related to incremental construction costs and consumer energy cost savings.
Energy and Economic Impacts
| Model Energy Code | Measure | Energy Cost Savings |
|---|---|---|
| Residential Statewide Impact Potential (2024 IECC) | Incremental First Cost of 2024 IECC ($/home) | $ 8,690 |
| Annual Energy Cost Savings ($/home) | $ 201 | |
| Annual Energy Savings (kBtu/home) | 22,889 | |
| 30 year Life Cycle Cost (LCC) Savings ($/home) | -$ 3,900 | |
| Simple Payback Period (years) | 43.3 | |
| Housing Starts (15 year average)** | 2,708 | |
| Statewide Total Incremental Cost Impact ($) | $ 23,532,520 | |
| Statewide First Year Energy Cost Savings ($) | $ 544,308 |
** Based on 2020 U.S Census, American Housing Survey 15 year average housing starts
Contacts
301 S. Park Avenue
P.O. Box 200517
Helena, MT 59620
United States
1100 N Last Chance Gulch
Helena, MT 59620
United States