Quick answer: A Louisville, CO home valued at the $808,615 median sale price owes about $4,917 in property taxes for 2025, paid in 2026, or about 0.61% of value. That uses the 91.135-mill total for Louisville's base tax area on Boulder County's 2025 mill levy list. A metro district can add over $2,200.
By Nick Ahrens, Colorado real estate broker license FA.100104470, eXp Realty
Published November 9, 2026.
How much are property taxes on a Louisville, CO home in 2026?
About $4,917 a year on an $808,615 home in Louisville's base tax area, roughly 0.61% of value, or about $410 a month in escrow. That is the tax year 2025 bill, paid in 2026. Tax area 0090 (Boulder Valley School District, City of Louisville, Louisville Fire District, Northern Colorado Water and Urban Drainage and Flood Control) totals 91.135 mills on the county's 2025 mill levy changes list. The $808,615 figure is Louisville's median sale price for the three months ending September 2026, down 4.8% from a year earlier, per Redfin's Louisville housing market page.
Here is the math, assuming the assessor's actual value equals that median:
- School share: $808,615 x 7.05% = $57,007 school assessed value. At 48.044 mills for Boulder Valley School District, that is $2,739.
- Local government share: $808,615 x 6.25% = $50,538 local assessed value. At the other 43.091 mills, that is $2,178.
- Total: $4,917 a year.
The 43.091 local mills break down as Boulder County 24.046, Louisville Fire District 10.586, City of Louisville 6.559, Northern Colorado Water 1.000 and Urban Drainage and Flood Control 0.900. On the median home, the city's own levy is only about $331 a year; the county (about $1,215) and the fire district (about $535) are bigger pieces. The two assessment rates come from the Boulder County Assessor's tax calculation page.
Nick Ahrens, a North Denver relocation specialist with eXp Realty, tells Louisville buyers and sellers to price taxes by tax area, because one Louisville subdivision can carry a metro district levy that nearly doubles the local share.
Sources and as-of dates: Boulder County Assessor 2025 mill levy changes list (tax year 2025, payable 2026), mill levy page and tax calculation page; Boulder County Treasurer 2026 due dates; Colorado Division of Property Taxation; Colorado Real Estate Commission Contract to Buy and Sell (CBS1, mandatory January 1, 2026); Takoda Metropolitan District website; Redfin Louisville data for the three months ending September 2026. All checked November 9, 2026.
What this guide does not cover: commercial or vacant land, property tax exemptions, HOA dues, valuation appeal strategy, or tax advice. Talk to a CPA or tax advisor about your own situation, and confirm any exact bill with the Boulder County Treasurer.
How is a Louisville property tax bill calculated?
It is two calculations added together: actual value x 7.05% x the school mills, plus actual value x 6.25% x every other mill, for tax year 2025. Colorado split residential property into separate school and local assessment rates starting in 2025, per the Colorado Division of Property Taxation. The pieces:
- Actual value: the assessor's market value, set from comparable sales. For tax years 2025 and 2026, those sales had to close between January 1, 2023 and June 30, 2024.
- Assessed value: actual value times the assessment rate (7.05% for schools, 6.25% for local governments in 2025).
- Mill levy: each district's rate. One mill is $1 of tax per $1,000 of assessed value.
- Tax due: school assessed value x school mills, plus local assessed value x local mills.
The surprise for many buyers: your purchase price does not reset the tax value. Colorado revalues real property every odd-numbered year, so the next reappraisal is tax year 2027. If you are coming from a state where a sale resets the tax base, compare the two systems in our California vs. Colorado property tax guide.
Which Louisville tax areas cost more, and by how much?
Boulder County's 2025 list shows 13 tax areas that include the City of Louisville, running from 90.135 to 134.780 mills, which is a spread of about $2,256 a year on the median home. Every one carries the same 48.044-mill school levy, so the difference sits in the local share. On an $808,615 home:
- Tax area 0099, no Northern Colorado Water levy: 90.135 mills, about $4,866.
- Tax area 0090, base Louisville: 91.135 mills, about $4,917.
- Tax area 0059, adds the Redtail Ridge Metropolitan District (5.000 mills): 96.135 mills, about $5,169.
- Tax area 1431, Mountain View Fire District (plus a Rocky Mountain Fire bond levy) instead of Louisville Fire: 97.901 mills, about $5,259.
- Tax area 0098, adds the Takoda Metropolitan District (43.645 mills): 134.780 mills, about $7,122.
That Takoda line is the big one: about $2,206 a year on its own at the median, and about $2,728 on a $1 million home. The Takoda Metropolitan District says it was formed to finance public infrastructure such as water, sewer, streets and parks, and that it overlaps Boulder County, the City of Louisville, Boulder Valley School District and Louisville Fire District.
For comparison, the City of Boulder's base tax area totals 89.200 mills on the same county list; our Boulder property tax guide runs that math. To find the tax area for any address, open the Assessment tab on Boulder County Property Search. A school levy is not a school assignment; to confirm which schools serve an address, use the official BVSD school finder.
Comparing Louisville homes, or getting ready to sell one?
Send me the addresses. I'll pull each tax area and mill levy so you compare the real monthly cost, or so your listing shows buyers the tax number up front.
Call or text me: 949-230-3625, search Louisville homes for sale, or get your Louisville home value.
What will a $1 million Louisville home pay?
About $6,080 a year in the base tax area for tax year 2025: $3,387 in school taxes plus $2,693 in local taxes. The effective rate stays near 0.61% at any price in tax area 0090, so the bill scales with value:
- $1,000,000, tax area 0090: about $6,080 a year, or $507 a month.
- $1,000,000, Takoda tax area 0098: about $8,808 a year, or $734 a month.
- $1,250,000, tax area 0090: about $7,600 a year.
- $1,250,000, Takoda tax area 0098: about $11,010 a year.
What changes for tax year 2026, paid in 2027?
Very little on a median home: the local assessment rate rises to 6.8% but applies after a reduction of 10% of the first $700,000 of value, so the base-area estimate dips about $13, to roughly $4,903, if 2025 levies hold. The school rate stays at 7.05% on full value, per the Boulder County tax calculation page. The math in tax area 0090:
- $808,615 home: ($808,615 - $70,000) x 6.8% = $50,226 local assessed value, x 43.091 mills = about $2,164, plus the same $2,739 school share = about $4,903.
- $1,000,000 home: ($1,000,000 - $70,000) x 6.8% = $63,240, x 43.091 mills = about $2,725, plus $3,387 = about $6,112, up about $32.
- $1,250,000 home: the $70,000 reduction is capped, so the estimate rises about $91, to about $7,692.
These are estimates. Districts certify 2026 mill levies in December 2026, after this post, and the 2027 bill will use those new levies.
How do property taxes work at closing when you sell a Louisville home?
The seller credits the buyer for the current year's taxes up to the closing date, because Colorado taxes are billed a year in arrears; the 2026 bill is not mailed until after January 1, 2027. Under the Contract to Buy and Sell, section 16.1.1, the parties pick the basis for that credit, per the Colorado Real Estate Commission contract form:
- Taxes for the calendar year immediately preceding closing: last year's bill, the simple default.
- Most recent mill levy and most recent assessed or actual valuation: tracks current rates and value.
- Other: any basis both sides agree to in writing.
Unless the Additional Provisions say otherwise, those prorations are final. On the median home, a December 15, 2026 closing covers 349 of 365 days, so $4,917 x 349 / 365 = about $4,701 credited from seller to buyer.
Two more contract lines matter for sellers. Section 8.5 requires a Tax Certificate listing any special taxing or metropolitan districts to reach the buyer by the Record Title Deadline, and the buyer can terminate if its content is unsatisfactory. Section 8.4 warns buyers that metro districts can raise mill levies to pay debt. If your home sits in a metro district tax area, put the levy in your listing materials so it does not surface late. The Boulder County Treasurer's due dates for 2026 were March 2 and June 15 for two halves, or April 30 in full.
Which Louisville tax estimate should you use?
Use the total for the exact tax area, run both the 2025 and 2026 formulas, and budget the higher number until the 2027 bill arrives.
Choose the base-area estimate (about 0.61% of value) if:
- Property Search shows tax area 0090 or 0099.
- You are screening several homes and need one starting number.
Choose the full tax-area total if:
- The Tax Certificate or Property Search lists a metropolitan district such as Takoda or Redtail Ridge.
- The address is served by a fire district other than Louisville Fire.
Choose the mill-levy proration basis if:
- The seller's last bill reflects an exemption that ends at the sale.
- You want the closing credit to track current values and rates.
Choose to call the Treasurer first if:
- The last bill does not match the formula above.
- The home was built or remodeled recently, which can change its actual value.
"In Louisville, the address you pick can move the tax bill by more than $2,000 a year at the same price. Buyers should see that number before they write an offer, and sellers should show it before buyers ask." Nick Ahrens, North Denver relocation specialist with eXp Realty.
Taxes are one line of the budget. Check whether Louisville is a buyer's or seller's market right now, and if you are selling, see the full cost to sell a house in Louisville. Ready to move? Search homes for sale, see what your home is worth, or call or text me at 949-230-3625.
Related reading for Louisville buyers and sellers
Frequently Asked Questions
What is the property tax rate in Louisville, CO?
In Louisville's base tax area, the 2025 total is 91.135 mills, which works out to about 0.61% of actual value after Colorado's two assessment rates are applied. The 13 tax areas that include the City of Louisville run from 90.135 to 134.780 mills on Boulder County's list.
How much are property taxes on a $1 million home in Louisville?
About $6,080 a year in the base tax area for tax year 2025, paid in 2026: $3,387 in school taxes plus $2,693 in local taxes. In the Takoda Metropolitan District tax area, the same home pays about $8,808.
Does buying a Louisville home reset its property tax value?
No. For tax years 2025 and 2026, the assessor sets actual value from sales between January 1, 2023 and June 30, 2024, not from your purchase price. The next reappraisal is tax year 2027.
When are Boulder County property taxes due?
Colorado taxes are paid a year in arrears. For 2025 taxes paid in 2026, the Boulder County Treasurer set two half payments on March 2 and June 15, or one full payment on April 30.
About Nick Ahrens
Nick Ahrens is a Colorado real estate broker with eXp Realty who helps buyers and sellers in Louisville, Broomfield, Anthem, Baseline and the North Denver suburbs. Call or text 949-230-3625, or visit youranthemhome.com.
