September 15, 2026
The Trump administration told a Colorado federal court Tuesday that federal law preempts Colorado and the city of Denver's regulations on greenhouse gas emissions from buildings, backing a magistrate judge who recommended that a lawsuit challenging the regulations proceed.
October 03, 2025
The city and county of Denver have pushed for the dismissal of a suit filed by real estate trade groups challenging regulations on greenhouse gas emissions from buildings, arguing on Friday in federal court the goal of the regulations is "to avoid the injuries plaintiffs ascribe to it."
March 31, 2025
A Colorado federal judge tossed a suit challenging state and Denver laws that set target dates for certain properties to reduce their greenhouse gas emissions, saying the trade groups that brought the claims lacked standing.
June 25, 2024
The city of Denver says residential and commercial real estate trade groups have failed to show why they can't comply with recent city and state energy-efficiency standards for buildings and appliances, looking to ditch their lawsuit in federal court.