Colorado's baseline residential assessment rate gives established neighborhoods in Denver, Boulder, Jefferson, and El Paso counties some of the lowest effective property tax rates in the United States, typically 0.50% to 0.65% of market value.
However, in master-planned new-construction communities across Adams (Thornton, Brighton, Commerce City), Douglas (Parker, Castle Rock, Highlands Ranch, Sterling Ranch), Arapahoe (Aurora), Weld (Erie, Frederick, Firestone, Severance), El Paso (Colorado Springs / Banning Lewis Ranch / Falcon), and Larimer (Timnath, Berthoud), developers finance water, sewer, roads, and parks through Colorado Title 32 Metropolitan Districts ("Metro Districts").
A Metro District can add 35 to 65+ mills on top of school and county levies, pushing the total effective property tax rate to 1.25% to 2.10%+ of the home's value. Because underwriters qualify your front-end and back-end DTI using the parcel's verified county assessor mill levy certificate (plus any separate HOA fee), a $500,000 Metro District home can carry $350 to $550 more per month in tax escrow than an older home at the exact same price.