That pesky anti-energy code legislation is back for a third year. MO House Bill 2384 would cap energy codes in Missouri at the IECC 2009 edition. The bill also limits local jurisdictions from enacting any sustainability, energy efficiency or high performance energy standards for residential, commercial or industrial buildings. This is overreach on the State of Missouri’s part and it does not support greener and healthier buildings for Missourians, you and your community.
You can take action by contacting your Missouri Elected Officials and voicing your opposition to this bill. See below for a bill summary and talking points to help you out!
Don’t know who elected officials are? Look up your State Rep here and your Senator here.
UPDATE (February 23, 2026): This bill has passed the Missouri House and is now in the Senate. Reach out to your MO Senator via this one-click campaign provided by USGBC!
Missouri HOUSE BILL 2384 (HB 2384) Summary:
HB 2384 prohibits any county or municipality from enacting or maintaining any ordinance, regulation, or other policy that requires an owner, builder, or developer to implement green building design and construction practices for one- or two-family dwellings, condominiums, multiunit townhouses, multiunit apartment buildings, or commercial or industrial buildings, with the intent to improve sustainability, energy efficiency, high-performance energy standards, environmental responsiveness and other standards specified in the bill, that threatens the affordability of the construction, maintenance, repair or renovation. Two other pieces of legislation have been merged with the anti-code legislation this year: a single stair provision for multi-family buildings and timeline provisions for permitting.
Talking Points:
HB 2384 Removes local control – Given that the State of Missouri does not have a state wide building or energy code, this bill is an overreach by the state. Over 80 local jurisdictions have adopted energy codes that are beyond the 2009 code – this includes large and small cities all over the state, including the City of St. Louis and St. Louis County.
HB 2384 Leaves Missouri behind – The most recent IECC set of codes was published in 2024 and is currently available for adoption. States including Nebraska, Louisiana, and Texas have adopted at least the 2015 IECC as a statewide standard. Illinois requires that builders comply with the 2021 IECC. We cannot compete with other states with codes that are over a decade behind the most current codes.
HB 2384 Harms Missouri companies and their employees – Companies that produce high quality construction materials, including high-performance windows, building enclosures, roofing, insulation and air sealing products will lose business. In addition, local energy consultants, architects, engineers and heating & cooling companies could also lose work due to this legislation. Jobs that are responsible for making energy efficiency improvements in our buildings cannot be outsourced.
HB 2384 Increases energy bills and creates poor health impacts for Missourians – Modern energy codes (IECC 2021, 2024) improve insulation, air sealing, and mechanical systems, reducing energy costs by $40-$50 per month. Over a 30-year mortgage, homeowners save approximately $15,000 – money that stays in Missouri’s economy. (Source: International Code Council). These same energy efficiency measures improve indoor air quality by reducing mold, moisture and pollutants that can contribute to asthma and respiratory issues.
Want to get more involved? Consider joining MGGBC’s Advocacy Committee!
Questions? Contact Emily Andrews.