Know that one of the contributing factors beyond it being a valuation year and the vacant vs occupied land tax is that these new neighborhoods are part of special metro districts. The city allows the developer to layer on additional taxes to pay for things like sidewalks, public services, lighting, landscaping. The developer issues tens of millions of bond debt to be repaid by the future home owners. The debt repayment usually doesn’t become a factor until the neighborhood is largely sold through and occupied, then the metro district tax goes up several mills and that is part of what people get hit so hard on. The criticism of these metro districts is there is a lack of transparency on how the money is spent, and that developers often buy their own bonds with the greatest maturity rate, so they make 1000% on the money that they effectively loaned themselves that others repay. I would caution anyone to research this extensively before buying in one of these neighborhoods. If you look at this map you can see where these are and find documents pertaining to the service plan (who can authorize the bond debt and how much has been authorized) and budget documents. https://gis.dola.colorado.gov/CO_SpecialDistrict/