By Prerna Kapoor, CLHMS | REAL Brokerage | August 25, 2026
I had two buyers under contract within a few weeks of each other this spring. Both homes appraised within about fifteen thousand dollars of each other. One was a resale in Highlands Ranch, the other a newer build in Castle Rock still finishing out its street. When their lenders ran the final numbers, the estimated annual tax bills came out well over a thousand dollars apart, on homes that were nearly identical in price. Both buyers asked me the same question: why?
The list price tells you almost nothing about what you’ll actually owe every year. If you’re comparing homes across Parker, Castle Rock, Highlands Ranch, Cherry Creek, or Greenwood Village, the tax bill can move around more than most buyers expect, and it’s worth understanding before you fall for a house.
It Comes Down to Two Numbers
Colorado property tax is the actual value of the home, multiplied by an assessment rate, multiplied by the mill levy. For tax year 2026, residential property is assessed at 7.05% for school district portions and 6.8% for everything else, with a 10% reduction applied to the first $700,000 of actual value on that local-government portion. Per the Douglas County Assessor’s own calculation guide, a $500,000 home works out to roughly $33,250 in school-assessed value and $30,600 in local-government-assessed value before the mill levy is even applied. The assessment rate is set by the state and barely varies by address. The mill levy is where things get interesting.
A mill is one-tenth of one percent. Every taxing authority with a claim on your property, the county, the school district, the fire district, water and sanitation, and often a metro district, certifies its own mill levy each December, and your total bill is the sum of all of them. Two homes with identical assessed values can end up with very different bills purely because they sit inside different combinations of taxing authorities.
The Real Variable Is the Metro District
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A metro district is a special district created under Colorado’s Title 32, and to qualify it has to provide at least two public services, things like roads, water, parks, or storm drainage. Developers use them to finance the infrastructure a new neighborhood needs, streets, sidewalks, water lines, sometimes a clubhouse or trail system, by issuing bonds and then paying them off with a dedicated property tax mill levy on the homes inside the district. The Colorado Division of Local Government’s guide for residents is a good plain-English explainer, and it’s worth knowing that state law requires you to receive metro district tax disclosures before you close, not after.
A metro district’s mill levy can run from single digits in an older, largely paid-off district to well over 60 or 80 mills in a newer development that’s still servicing its original construction bonds. Neither number is wrong. It just reflects how much infrastructure debt is still outstanding and how long ago it was issued. Over time, as bonds get retired, that mill levy is supposed to come down, but it can take fifteen to twenty years, sometimes longer if the district issues new bonds for a later phase of the same development.
How This Plays Out Across My Service Area
Parts of Parker and Castle Rock that have been built out within the last decade tend to carry newer metro districts, and newer means the construction debt is still fresh, so the added mill levy tends to run on the higher end. I go into the infrastructure side of this in my Castle Rock water supply guide, since water infrastructure financing is one of the bigger cost drivers behind those levies. Castle Pines has similar dynamics in some of its newer luxury sections.
Highlands Ranch is a different story. It’s one large, long-established metro district rather than a patchwork of newer ones, and a lot of its original infrastructure debt has already been paid down, which is part of why its added mill levy tends to run lower than a brand-new development nearby. I broke down exactly what that district covers, and what it doesn’t, in my Highlands Ranch metro district guide.
Cherry Creek and Greenwood Village are mostly built out and largely predate the current wave of metro-district-financed development, so you’ll typically see fewer of these added layers there at all. That’s one more thing that separates them from newer Douglas County construction beyond the obvious price difference. If you’re comparing all three areas side by side, I put together a broader Parker vs. Castle Rock vs. Lone Tree comparison that covers more than just tax structure.
What to Actually Check Before You Write an Offer
Don’t rely on a rule of thumb here. Ask your agent or the listing agent for the actual current mill levy on the specific parcel, not just the county average, and factor that into your monthly payment estimate the same way you’d factor in HOA dues. Douglas County publishes a mill levy calculation tool you can look up by address, and a good lender will run a real escrow estimate using the actual levy rather than a placeholder number. If your county assessment feels high relative to comparable homes once you own the place, I also wrote a guide to appealing a Colorado property tax assessment that walks through that process. And if you’re weighing how a higher or lower tax bill changes what you can actually afford, that’s exactly the kind of monthly-payment math I cover in my Colorado buyer financing playbook.
Quick answers
Does a more expensive home always come with a higher tax bill?
Not necessarily. The assessed value matters, but the mill levy where the home sits often matters more. A less expensive home in a heavily bonded newer metro district can carry a higher effective tax rate than a pricier home in an older, mostly paid-off area.
How do I find the actual mill levy for a specific home before I make an offer?
Ask your agent to pull the current mill levy for that exact parcel, not a citywide average, and request the metro district disclosure the seller is required to provide. Douglas County’s assessor site also has a lookup tool by address.
Will my property taxes go down once the metro district pays off its bonds?
Usually, eventually, but not on a fixed schedule. It depends on how the bonds were structured and whether the district issues new debt for a later development phase, so don’t count on a specific year without checking the district’s own certified levy history.
Prerna Kapoor | REALTOR® | Luxury Home Specialist
REAL Brokerage | 720-949-5450 | info@prernakapoor.com
CLHMS • RENE • PSA • ABR | International Sterling Society Award Winner
Prerna specializes in residential real estate across Parker, Aurora, Lone Tree, Castle Pines,
Highlands Ranch, Cherry Creek, Greenwood Village, and Centennial. She speaks English, Japanese,
and Hindi.
