Why two similar Douglas County homes can have different tax bills

In Douglas County, two houses can sell for about the same price and still get different property tax bills. That surprises people, but it follows from how the tax is built.

Colorado figures a property tax in three steps: the assessor sets the home’s actual value, the state applies an assessment rate to get a smaller “assessed” value, and then a mill levy is applied. The mill levy is the part that varies by location.

That is because a single address can sit inside several overlapping districts at once. Besides the county and the school district, a home may also be inside a town, a fire protection district, a water and sanitation district, a library district, and often a metropolitan district that helped pay for the neighborhood’s roads and pipes. Each of those bodies sets its own mill levy, and they stack. So a newer subdivision with its own metro district can carry a different total than an older neighborhood next door, even at the same sale price.

None of these numbers are fixed, and they change year to year, so it is not worth guessing. The honest move before buying is to look up the specific parcel and see which districts it falls in.

To see how your bill is calculated and which districts apply, use the Douglas County Assessor and Colorado’s Division of Property Taxation.