What Are Property Tax Rates Like in Jefferson County versus Arapahoe County for Homeowners Right Now

Colorado property taxes are calculated using two variables: an assessed value and a mill levy. Understanding both is essential before you can make sense of any county-to-county comparison, because neither number alone tells the full story.

Assessed Value vs. Market Value

Your county assessor estimates your home's actual value, called the actual value or market value, every two years during a reassessment cycle. Colorado then applies a state-set assessment rate to that figure to produce the assessed value, which is the number the mill levy is applied to.

For the 2025 and 2026 tax years, the residential assessment rate in Colorado is 6.765 percent. That rate applies statewide, meaning both Jefferson County and Arapahoe County use the same percentage when converting your home's market value into an assessed value. The divergence between counties comes entirely from the mill levy, not from the assessment rate.

The Mill Levy Explained

A mill is one-tenth of one cent, or $1 of tax per $1,000 of assessed value. Your total mill levy is not a single government number; it is a stack of levies from multiple taxing authorities layered on top of each other.

Those layers typically include the county itself, the local school district, the municipality or unincorporated area, fire protection districts, water and sanitation districts, and sometimes special metropolitan districts. A home in Lakewood and a home in Arvada are both in Jefferson County, but they sit in different school districts and different municipal jurisdictions, so their total mill levies are not identical. The same logic applies across Arapahoe County, where a home in Aurora carries a different composite levy than a home in Centennial or Englewood.

2. Property Tax Rates in Jefferson County Right Now

Jefferson County's effective property tax rate for residential homeowners currently sits in the range of approximately 0.50 to 0.65 percent of market value, depending on location within the county. That range reflects the variation in local mill levies across Jefferson County's many cities, fire districts, and special districts.

Current Assessment Rate and Mill Levy in Jefferson County

Jefferson County's base county mill levy for 2025 (billed in 2026) is approximately 13.00 mills from the county government itself. The Jefferson County R-1 School District, which covers most of the county's residential areas including Lakewood, Arvada, Wheat Ridge, Littleton portions, and Golden, carries a school district levy in the range of 44 to 50 mills depending on the specific sub-area.

When you add the county levy, the school district levy, municipal levies, and special district levies together, total composite mill levies in Jefferson County commonly land between 75 and 95 mills for most residential properties. Unincorporated areas of the county with no city levy tend to sit at the lower end of that range. Incorporated cities with their own mill levies push totals higher.

What a Typical Jefferson County Home Actually Pays

Consider a home in Lakewood with a market value of $575,000, which is close to the median sale price in that city as of September 2026. Applying the 6.765 percent assessment rate produces an assessed value of approximately $38,900. At a composite mill levy of 85 mills, the annual property tax bill would be approximately $3,307.

For a home in Arvada priced at $620,000, the assessed value at 6.765 percent is approximately $41,943. At a composite mill levy of 88 mills, the annual bill comes to approximately $3,691. These are illustrative calculations; your actual bill depends on the precise mill levies certified for your specific parcel, which you can confirm through the Jefferson County Assessor's office.

Jefferson County is one of the larger and more geographically varied counties in the Denver metro, stretching from the plains near Wheat Ridge west into the foothills communities of Evergreen, Morrison, and Conifer. Homes in the mountain foothills can carry different fire district levies than homes closer to the urban core, which is one more reason to pull the actual certified levy for any specific property rather than relying on county averages.

3. Property Tax Rates in Arapahoe County Right Now

Arapahoe County's effective residential property tax rate currently runs somewhat higher than Jefferson County's, generally in the range of 0.55 to 0.75 percent of market value. The county spans a wide swath of the southeast Denver metro, covering Aurora, Centennial, Englewood, Littleton portions, Sheridan, and large unincorporated areas, each carrying its own composite mill levy.

Current Assessment Rate and Mill Levy in Arapahoe County

Arapahoe County's base county mill levy for 2025 taxes (billed in 2026) is approximately 13.5 mills from the county government itself, slightly above Jefferson County's base rate. School district levies vary considerably across Arapahoe County because the county contains portions of multiple school districts: Cherry Creek School District, Aurora Public Schools, Littleton Public Schools, Englewood Schools, and Sheridan School District all operate within county boundaries.

Cherry Creek School District, which covers Centennial and portions of Aurora, carries one of the higher school district levies in the metro, contributing meaningfully to composite totals in those areas. Total composite mill levies across Arapahoe County residential properties commonly range from 85 to 115 mills, with properties in Aurora's metro districts and certain Centennial subdivisions sometimes reaching the upper end of that range.

What a Typical Arapahoe County Home Actually Pays

Take a home in Centennial with a market value of $625,000, near the median for that area in September 2026. At the 6.765 percent assessment rate, the assessed value is approximately $42,281. With a composite mill levy of 95 mills, the annual tax bill works out to approximately $4,017. That is roughly $700 more per year than the comparable Lakewood example above, even though the homes are similarly priced.

For a home in Aurora priced at $480,000, the assessed value is approximately $32,472. At a composite mill levy of 100 mills, which is common in parts of Aurora that include metro district levies, the annual bill is approximately $3,247. Aurora's wide geographic footprint means its mill levies vary considerably from one subdivision to the next, particularly where metropolitan districts have been formed to finance infrastructure.

For a deeper breakdown of how Arapahoe County compares to other Denver metro counties including Denver, Douglas, and Adams, this county-by-county property tax comparison is a useful reference point.

4. Jefferson County vs. Arapahoe County: A Side-by-Side Comparison

When you compare property tax rates in Jefferson County versus Arapahoe County for homeowners right now, Arapahoe County tends to carry a higher effective rate, primarily driven by school district levies and the prevalence of metropolitan district levies in newer developments. The gap is not uniform, however, and there are pockets of each county where the relationship flips.

Where the Numbers Diverge

The clearest difference shows up in the school district component. Jefferson County R-1 is a single large district covering most of the county's residential base, which creates a relatively consistent school levy across the county. Arapahoe County's multiple school districts produce more variation, and the Cherry Creek district's levy is notably higher than Jefferson County R-1's on a mill-for-mill basis.

Metropolitan districts are the other major variable. Many of Arapahoe County's newer master-planned communities, particularly in Centennial and southeast Aurora, were built using metropolitan district financing, which adds a dedicated metro district mill levy on top of all the standard levies. Jefferson County has metro districts too, but they are less prevalent in its older, more established residential stock.

Why Mill Levies Vary Within Each County

Within Jefferson County, a home in Golden carries a different composite levy than a home in Wheat Ridge, because Golden has its own city mill levy while Wheat Ridge has its own separate municipal rate. In the foothills, fire protection district levies can be higher than those in the urban core because the districts serve lower-density areas with higher per-property service costs.

Within Arapahoe County, Englewood and Sheridan have their own municipal levies and school districts that differ from Centennial and Aurora. Unincorporated Arapahoe County areas, which have no city levy, can sometimes carry lower composite rates than incorporated cities within the county. The practical takeaway is that you should always request the specific mill levy certificate for any property you are seriously considering, not just a county average.

5. Colorado's Changing Property Tax Laws and What They Mean for Buyers

Colorado's property tax landscape has shifted significantly since 2023, and buyers in both Jefferson County and Arapahoe County need to understand those changes before locking in a budget. The state legislature has passed multiple bills aimed at tempering the impact of rising home values on tax bills, but those measures have not fully insulated homeowners from higher costs.

Senate Bill 233 and Subsequent Adjustments

Colorado's 2023 and 2024 legislative sessions produced a series of property tax relief measures, including temporary reductions to the residential assessment rate and caps on how much assessed values could grow from one reassessment cycle to the next. Those measures brought the assessment rate down from the historical 7.15 percent to 6.765 percent for the current cycle.

Despite those caps, many Colorado homeowners have still seen meaningful tax increases. As Denverite reported, even when a home's value does not change, the overall tax bill can rise because local governments are authorized to adjust their mill levies upward when assessed values are capped, partially offsetting the relief the state intended to provide. That dynamic affects both Jefferson County and Arapahoe County homeowners.

The next statewide reassessment cycle will reflect values as of June 30, 2026, with new assessed values taking effect for 2027 tax bills. Given that Denver metro home prices have remained elevated through 2026, buyers purchasing today should anticipate that their first reassessment could produce a higher assessed value than the current owner's tax bill reflects.

How to Budget for Future Tax Changes

When you are underwriting a purchase in either county, use the current tax bill as a floor, not a ceiling. A reasonable planning assumption is to budget for a tax increase of 10 to 20 percent at the next reassessment if you are paying significantly more than the current assessed value implies. Your lender will use the current tax bill when calculating your debt-to-income ratio and escrow payment, but your actual costs could rise.

If you are selling a home in Centennial or Littleton, it is worth noting that buyers will increasingly scrutinize the tax line on the listing sheet, particularly as tax bills have climbed across the metro. You can read more about pricing strategy and what buyers are paying attention to in the current market in this guide to selling a home in Centennial.

6. Practical Steps for Homebuyers Comparing Tax Costs Across Counties

Comparing property tax rates in Jefferson County versus Arapahoe County for homeowners right now requires looking at individual parcel data, not just county-level averages. Here is a straightforward process for doing that accurately.

Step one: Pull the current tax bill from the county assessor's website. Both Jefferson County and Arapahoe County publish searchable property records online. Search by address to find the current assessed value, the mill levy breakdown, and the most recent annual tax amount. This takes about two minutes per property and is far more reliable than any estimate.

Step two: Check whether the property sits within a metropolitan district. Metro district levies are listed in the mill levy breakdown on the assessor's record. If you see a line item for a metropolitan district, note the mill rate separately. Metro district levies in the Denver metro commonly run from 20 to 60 additional mills, which can add $800 to $2,500 or more per year to a home's tax bill depending on the property's assessed value.

Step three: Calculate the effective rate on the purchase price, not the current assessed value. Divide the current annual tax bill by the home's list price to get an approximate effective rate. Then recalculate using the 6.765 percent assessment rate applied to your purchase price, multiplied by the property's composite mill levy, to estimate what your first reassessment might look like.

Step four: Compare total housing costs, not just the purchase price. A $600,000 home in Lakewood with a $3,300 annual tax bill and a $600,000 home in Centennial with a $4,200 annual tax bill have a $900 per year difference, or $75 per month. Over a 30-year hold, that is $27,000 in additional tax costs at today's rates, before accounting for future increases. Factoring this into your side-by-side comparison of Jefferson County versus Arapahoe County gives you a much clearer picture of true affordability.

Step five: Ask about pending mill levy elections. School districts, fire districts, and municipalities in both counties periodically ask voters to approve new or increased mill levies. If an election is scheduled for November 2026, a yes vote could increase your tax bill starting with the 2027 assessment year. Your real estate agent can help you identify whether any such measures are on the ballot for the specific area you are considering.

For broader context on what buyers are navigating in the Denver metro right now, including pricing trends and inventory conditions that interact with carrying costs like taxes, the Denver Metropolitan Area real estate market guide covers the current landscape in detail.

It is also worth noting that Colorado's overall property tax burden, while rising, remains lower than many comparable states. The state's effective average rate has historically ranked among the lower half nationally, though recent reassessment cycles have compressed that advantage for owners in high-appreciation markets like the Denver metro.

If you are also evaluating timing, the question of whether to buy now or wait is closely tied to how rising carrying costs, including taxes, interact with interest rates and purchase prices. This analysis of whether now is a good time to buy in the Denver metro walks through that trade-off in detail.