In Colorado, your ESA housing rights rest first on state law. Under the Colorado Anti-Discrimination Act, as amended by HB26-1045, an emotional support animal is an assistance animal (C.R.S. § 24-34-301), and a complete ban on assistance animals in housing is presumed discriminatory (C.R.S. § 24-34-502.2). This state protection is enforced by the Colorado Civil Rights Division (CCRD) and remains fully active. The federal Fair Housing Act (42 U.S.C. § 3604) provides the same obligation, and that statute has not changed.
Landlords in Boulder who refuse a valid ESA letter or continue charging pet fees may be in violation of the Colorado Anti-Discrimination Act (CADA) and federal law. Complaints can be filed with the Colorado Civil Rights Division (CCRD)