DENVER — Colorado’s Public Utilities Commission approved a 41 percent greenhouse gas reduction target for natural gas utilities by 2035, a decision that energy policy analysts say will force hundreds of thousands of homeowners to replace gas furnaces with electric heat pumps at costs exceeding $20,000 per household.
The December 2025 ruling, which applies to Xcel Energy, Black Hills Energy, and Atmos Energy, nearly doubles the previous 22 percent reduction mandate set for 2030. More than two-thirds of Colorado households rely on natural gas for winter heating.
Senate Bill 21-264 requires investor-owned gas utilities serving more than 90,000 customers to submit clean heat plans to the PUC. The commission’s December decision set the 2035 target at 41 percent below 2015 emission levels, with compliance methods including energy efficiency upgrades, heat pump installation, pipeline leak prevention, and home insulation improvements.
The PUC deferred targets for 2040 through 2050 until December 2032, but the commission’s written decision states it is “reasonable to conclude” that Colorado’s statutory climate goals correspond to 100 percent emissions elimination from gas utilities by 2050.
The approved target exceeded what the governor’s own agencies requested. The Colorado Energy Office and Air Pollution Control Division recommended a 31 percent reduction; environmental groups pushed for 55 percent. The PUC landed at 41 percent.
Utilities have warned the transition will be expensive. Black Hills Energy estimated compliance with the earlier 22 percent target at approximately $397 million annually, according to the Denver Gazette. Xcel Energy projected costs exceeding $1 billion over five years for the 2030 targets alone, surpassing the statutory cost cap of 2.5 percent of annual gas bills, according to the Independence Institute.
For individual homeowners, residential electrification retrofits cost in excess of $20,000 per home before incentives, according to utility filings cited by the Independence Institute. Colorado offers up to $14,000 in rebates through the income-qualified HEAR program for households earning up to 150 percent of area median income, but the upfront cost remains significant for many households.
According to the Independence Institute’s analysis of a 2024 National Renewable Energy Laboratory study, approximately zero percent of Colorado households would see cost savings by switching from natural gas furnaces to cold-climate heat pumps, given that electricity costs more than four times as much per unit of energy delivered as natural gas in the state.
Meeting the targets requires installing between 28,000 and 57,000 heat pumps annually through 2030, according to the Colorado Sun. The 2022 installation rate was 14 to 28 times lower than the required pace.
PUC Chairman Eric Blank has acknowledged the challenge. “The electric transition took 25 years. I am worried we are trying to jam too much into five years,” Blank told the Colorado Sun in June 2024. At a separate PUC meeting, Blank described the projected costs of the broader energy transition as “mind-boggling,” according to Complete Colorado.
The state’s Utility Consumer Advocate, Cindy Schonhaut, acknowledged affordability concerns, telling the Colorado Sun that “the problem is that bills are so high” for Colorado ratepayers.
Amy Oliver Cooke, president of Always On Energy Research and former executive vice president of the Independence Institute, told The Kim Monson Show on February 20 that energy transition modeling projects $620 billion in total costs for Colorado’s full energy transition, combining 100 percent renewable electricity by 2040 with complete residential heating electrification.
“Xcel Energy said that for natural gas customers, it’ll cost upwards of $20,000 to retrofit just your own home. And that’s before you’ve paid for their infrastructure costs,” Cooke said on the program.
Cooke warned that eliminating natural gas as a heating fuel would remove a critical backup during extreme weather. The Independence Institute’s modeling projected 26 hours of mid-winter blackouts under a fully electrified scenario. In December 2025, Xcel Energy preemptively cut power to thousands of Front Range customers ahead of high winds, according to Complete Colorado, illustrating existing grid vulnerability before the additional load from forced electrification.
Xcel Energy, which serves approximately one million gas customers in Colorado, has characterized its approach as a “balanced, dual-fuel clean heat transition” emphasizing affordability, reliability, and customer choice, according to the Colorado Sun.
The PUC will revisit targets for 2040 through 2050 in December 2032. In the meantime, utilities must file updated compliance plans demonstrating how they will achieve the 41 percent reduction by 2035 within the 2.5 percent rate cap.
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