A buyer comparing Highlands Ranch to a new subdivision farther south along I-25 will usually start with the listing price, and as of mid-2026 those two numbers can look almost identical. Highlands Ranch homes have been trading in the roughly $680,000 to $710,000 range for months. A comparably sized new build in one of the county's newer master-planned communities can land in the same neighborhood on price.
What the listing sheet won't tell you is that one of those homes is paying off infrastructure debt that's decades from finished, while the other is sitting on top of a system that's mostly already paid for. That difference doesn't show up in the sale price. It shows up on the tax bill, and it can run into the thousands of dollars a year, every year, for as long as the bonds are outstanding.
What a Mill Levy Actually Buys
Every property in Colorado pays a mix of tax rates set by different authorities: the county, the school district, and any special districts that serve the property. Douglas County's assessor explains the math plainly: each taxing entity figures out how much revenue it needs, divides that by the total assessed value in its boundaries, and the result is a mill levy, expressed as dollars owed per $1,000 of assessed value.
For most of that list, the entity is providing a service you're already using, like schools or county government. A metropolitan district is different. It's a financing tool, authorized under Colorado's Title 32, that lets a developer build roads, water lines, sewers, and parks by issuing bonds up front and then repaying that debt through a mill levy charged to the people who eventually buy homes there. The infrastructure gets built years before most residents move in. The bill arrives after they do, and it doesn't go away until the bonds are retired, which for some Douglas County districts is a multi-decade proposition.
On a $700,000 home, one mill works out to roughly $47 a year. A district charging 50 mills for debt service alone adds about $2,345 to the annual tax bill, on top of everything else. That's the part a builder's marketing sheet doesn't lead with.
The Range Across Douglas County Is Wider Than Most Buyers Expect
Not every metro district in the county charges the same rate, and the spread is bigger than a lot of people assume when they're comparing two similarly priced homes.
| District | 2024 Certified Levy | What It Covers | Where It Stands |
|---|---|---|---|
| Centennial Water and Sanitation District (serves Highlands Ranch) | Comparatively low, water and sewer only | Water and wastewater infrastructure, built out using surface water and reuse systems rather than relying solely on the Denver Basin aquifers | Infrastructure largely complete; no active bond-financed buildout underway |
| Founders Village Metropolitan District (Castle Rock) | 94.56 mills, the highest single district levy in the county | Debt service on bonds originally issued in 1986, restructured through a 1991 Chapter 9 bankruptcy into a 40-year repayment plan | On track to discharge in 2031, after which the district expects to adopt a significantly lower levy |
| Castle Pines North Metropolitan District | 3.5 mills as of 2024, down from 19 mills | Wholesale water and wastewater service only | Parks, recreation, and stormwater duties were transferred to the City of Castle Pines in 2023, cutting the levy roughly in half before it dropped again |
Founders Village is the extreme case, and it's an instructive one. Its combined mill levy, once schools and county rates are added in, clears 164 mills. On a $700,000 home, the district's debt-service line alone is around $4,440 a year, close to nine times what a Highlands Ranch homeowner pays for the equivalent water and sanitation charge. That gap is baked into the bond structure from 1986, not into anything a current homeowner did wrong.
Castle Pines North tells a different version of the same story. Its residents voted down a $49 million bond proposal for renewable water infrastructure in 2018, a project that would have carried a $103 million repayment cost, by roughly a 70 percent margin. Two years later the district handed off parks, open space, and stormwater management to the city itself, and the levy fell from 19 mills to 7, then down to 3.5. The lesson isn't that metro districts are bad. It's that the age and history of a specific district tells you far more about your future tax bill than the price of the house sitting inside it.
Why Highlands Ranch Looks Different on Paper
Highlands Ranch never went through the metro district model the way Founders Village or Castle Pines North did. Its water and sewer service runs through Centennial Water and Sanitation District, and its parks, trails, and recreation centers are funded through the Highlands Ranch Community Association, a mandatory homeowners association that collects dues rather than levying a bond-backed property tax. The roads and core infrastructure were largely built by the original developer decades ago and have since been absorbed into ongoing operations rather than financed through a district still working down 1980s-era debt.
That's the mechanical reason a Highlands Ranch buyer's effective property tax rate tends to run lower, in the neighborhood of half a percent to six-tenths of a percent of assessed value, than what a buyer in a newer bond-financed community can end up paying once the full mill levy phases in. It isn't that Highlands Ranch is exempt from special district taxation. It's that the district serving it finished the expensive part of its job a long time ago.
New Districts Are Still Being Formed This Year
This isn't ancient history. Douglas County commissioners spent time in July 2026 reviewing a proposed development called Bloom, and the numbers on the table looked a lot like the early chapters of Founders Village and Castle Pines North: a 50-mill debt levy, a 10-mill operations levy, a 60-mill cap, and $20 million in authorized debt against roughly $20.8 million in estimated infrastructure improvements. Applicant counsel Megan Murphy noted that if the bonds can't be repaid, the institutional bondholders bear the loss, not Douglas County taxpayers at large. That protects the county's general fund. It doesn't change what the homeowners inside that specific district will owe every year until the debt is retired or restructured.
Buyers looking at any new-construction listing in Douglas County right now should assume there's a good chance it sits inside a district at this earlier, more expensive stage of its life cycle, not the later, paid-down stage that Highlands Ranch is in.
The Paperwork That Actually Protects You
Colorado law has required, since January 1, 2024, that a seller of residential property inside a metropolitan district organized on or after January 1, 2000 provide the buyer with the district's official website before closing. That disclosure exists because the tax figure sitting in most MLS listings for new construction is a historical number, often pulled from a year when the lot was still vacant land. County assessors typically don't complete their first valuation of a newly built home until sometime within the first year after construction, and it isn't unusual for the metro district's share of the tax bill to show up on the escrow statement one or two years after closing rather than on day one.
That gap between the number in the listing and the number that eventually lands in escrow is the most common source of a mortgage payment surprise for new-construction buyers in the southern suburbs.
What to Actually Ask Before You Compare Two Houses by Price
- Request the district's current certified mill levy and its debt maturity schedule, not the builder's estimated tax figure.
- Ask whether the district is still issuing bonds or is further along in paying down existing debt, since that trajectory tells you whether the levy is likely to rise, hold steady, or eventually drop.
- Separate HOA dues from special district taxes on paper. They can both apply to the same address, and they're collected differently, one through your monthly dues and the other through your property tax escrow.
- If you're comparing a Highlands Ranch listing to new construction elsewhere in the county, ask your lender to run the total housing payment using the district's own projected levy rather than the number on the listing sheet.
A Few Questions Worth Settling Before You Write an Offer
Does Highlands Ranch have a metro district? Not in the bond-financed sense that Founders Village or Castle Pines North do. Water and sewer service runs through Centennial Water and Sanitation District, which levies a comparatively modest tax, while parks and recreation are funded through HRCA dues rather than a property tax.
Will a high metro district levy elsewhere ever come down? It depends entirely on the bond schedule. Founders Village's debt is structured to discharge in 2031, after which the district has said it plans to adopt a much lower levy. Castle Pines North's levy already dropped once its parks obligations were transferred to the city. Neither outcome is guaranteed on any given timeline, which is why asking for the district's own documentation matters more than assuming a levy will decline on its own.
Where do I find the actual mill levy for a specific address? The Douglas County Assessor publishes certified mill levies by taxing authority, and any metro district organized after 2000 is required to maintain a public website with its budget and levy history. Both are worth pulling before you get attached to a house.
Comparing two homes by price alone tells you what you'll borrow. It doesn't tell you what you'll actually pay every month for the next twenty or thirty years. If you're weighing a move into Highlands Ranch against something newer in Douglas County, or you're trying to make sense of what a specific district's paperwork actually says, the team at J. Garland Thurman has spent years walking clients through exactly this kind of comparison. Let's Connect.
