Property taxes in Boulder County, Colorado

Q: How are property taxes calculated in Boulder County?

Rate Gazetteer uses U.S. Census Bureau ACS county medians for real estate taxes paid and owner-occupied home value; the implied rate is median tax ÷ median value—a survey snapshot, not your parcel’s mill levy stack. Colorado applies separate school vs local assessment rates to residential value. Boulder County — median owner-occupied real estate taxes ($3,821) and median home value ($713,900) from the U.S. Census Bureau ACS 2023 5-year (Tables B25103 / B25077). Implied effective rate ≈ 0.54% (median tax ÷ median value). This is a survey-based county median, not a mill-levy reconstruction; Colorado taxes school and local portions of value using different assessment rates (Division of Property Taxation).

Q: How can I lower my property tax bill in Boulder County?

File a timely protest if you disagree with actual value on your notice of valuation, claim senior or veteran exemptions you qualify for under Title 39, and review tax area and mill levy lines on your treasurer statement—Colorado splits school and local assessed portions.

Q: What Colorado exemptions or protests matter in Boulder County?

Common programs include the senior property tax exemption for qualifying homeowners (statutory rules), disabled veteran exemptions where eligible, and other provisions in Title 39 C.R.S.—confirm filing deadlines with your county assessor.

Q: Why don’t these figures match my Colorado property tax bill?

This page uses U.S. Census Bureau ACS county medians for real estate taxes paid and home value—a county summary, not your parcel’s tax area mill stack. Colorado also applies different residential assessment rates to school vs local portions of value. Use your county assessor and treasurer notices for authoritative mills and credits.

For Boulder County, U.S. Census Bureau ACS county medians imply about 0.54% of median owner-occupied value in reported annual property taxes ($713,900 value, $3,821 taxes)—a regional benchmark, not your individual notice. Colorado splits school and local residential assessment rates; your tax area mill stack can differ materially.

Boulder County — median owner-occupied real estate taxes ($3,821) and median home value ($713,900) from the U.S. Census Bureau ACS 2023 5-year (Tables B25103 / B25077). Implied effective rate ≈ 0.54% (median tax ÷ median value). This is a survey-based county median, not a mill-levy reconstruction; Colorado taxes school and local portions of value using different assessment rates (Division of Property Taxation).

Boulder County mixes high-demand foothills cities with mountain towns; effective burdens vary sharply by tax area and valuation cycle.

Last verified2026-04-18

Reference

Rates at a glance

Effective rate is median real estate taxes ÷ median owner-occupied value (U.S. Census Bureau ACS 5-year). Colorado uses separate school vs local assessment rates—your tax area can differ.

Implied eff. rate (ACS medians): 0.54%
Median annual taxes (ACS): $3,821
Median home value (ACS): $713,900
County population (2024 estimate): 330,262

How this compares nationally

Boulder County’s modeled effective rate here is 0.54% of this page’s benchmark. That modeled effective rate is below the broad national band many surveys use for orientation (often roughly 1–1.3% of home value, varying by source and methodology)—local bills still depend on your parcel.

Orientation band (~1–1.3%): many U.S. surveys summarize owner-occupied property taxes in that range as a share of value—definitions differ. See Tax Foundation — Property taxes as a percentage of owner-occupied housing value (state / local, illustrative national context).

Estimate

Modeled property tax

Annual tax (modeled)

$3,821

Breakdown

Levy components

Major portions of the published rate stack (schools, county, specials) as labeled on the cited source—not parcel-specific.

Component	Detail
School districts	School mill levies apply to the school-assessed portion of residential value under the school assessment rate published annually by the Division of Property Taxation.
County, municipality, and special districts	Combined local-government mill levies apply to the local-government assessed portion; your tax area determines which authorities appear on the bill.

Assessment & taxable value

Colorado property tax applies **mill levies** to **assessed** value. For residential property, **school** and **local government** portions of **actual value** use **different statutory assessment rates** (see the Division of Property Taxation’s current rate chart). Your **notice of valuation** and **tax bill** list the **tax area** stack that applies to your parcel.

Exemptions & credits

SeniorReference
Senior property tax exemption (qualifying homeowners, § 39-3-203 C.R.S.)
Colorado offers a property tax exemption for qualifying seniors when statutory conditions are met—verify age, occupancy, and income rules with your county assessor.
Veteran / militaryReference
Disabled veteran exemption (where eligible)
Additional exemptions may apply for qualifying disabled veterans—documentation and filing are handled through the assessor.
Other creditReference
Notice of valuation / protest
You may protest assessed value on statutory timelines after your notice of valuation—see your county assessor’s protest materials.

Common programs include the **senior property tax exemption** for qualifying homeowners (statutory rules), **disabled veteran** exemptions where eligible, and other provisions in **Title 39 C.R.S.**—confirm filing deadlines with your **county assessor**.

Tools

Estimate for your home

Move the slider to scale this page’s published model to a different home value. Illustrative only.

Your value

$0—$2,213,900

Value

Illustrative annual tax

$3,821

Implied effective rate at this value: 0.54% (after value scaling).

The slider scales the headline modeled tax in proportion to this page’s benchmark home value. If your taxable assessed value differs from market price (caps, fractional assessment, exemptions), your actual bill will not match a simple market multiple.

Not a tax bill, legal estimate, or appeal tool. Exemptions, caps, specials, and assessment rules can change your actual amount; confirm with your assessor or collector.

FAQ

Common questions

Short answers tied to this county’s model—always confirm dates and eligibility on official notices.

How are property taxes calculated in Boulder County?

Rate Gazetteer uses U.S. Census Bureau ACS county medians for real estate taxes paid and owner-occupied home value; the implied rate is median tax ÷ median value—a survey snapshot, not your parcel’s mill levy stack. Colorado applies separate school vs local assessment rates to residential value. Boulder County — median owner-occupied real estate taxes ($3,821) and median home value ($713,900) from the U.S. Census Bureau ACS 2023 5-year (Tables B25103 / B25077). Implied effective rate ≈ 0.54% (median tax ÷ median value). This is a survey-based county median, not a mill-levy reconstruction; Colorado taxes school and local portions of value using different assessment rates (Division of Property Taxation).

When are property taxes due in Colorado?

Colorado payment schedules vary by county; your tax notice lists installment due dates.

How can I lower my property tax bill in Boulder County?

File a timely protest if you disagree with actual value on your notice of valuation, claim senior or veteran exemptions you qualify for under Title 39, and review tax area and mill levy lines on your treasurer statement—Colorado splits school and local assessed portions.

What Colorado exemptions or protests matter in Boulder County?

Common programs include the senior property tax exemption for qualifying homeowners (statutory rules), disabled veteran exemptions where eligible, and other provisions in Title 39 C.R.S.—confirm filing deadlines with your county assessor.

Why don’t these figures match my Colorado property tax bill?

This page uses U.S. Census Bureau ACS county medians for real estate taxes paid and home value—a county summary, not your parcel’s tax area mill stack. Colorado also applies different residential assessment rates to school vs local portions of value. Use your county assessor and treasurer notices for authoritative mills and credits.

Sources

Verification

Primary reference

U.S. Census Bureau — American Community Survey (2023 5-year), Table B25103 (median real estate taxes paid) and Table B25077 (median value for owner-occupied units), county level (Colorado)

Last verified: 2026-04-18
Evidence type: Estimated

Built from secondary sources, summaries, or mixed references—not a single primary document.

County figures use **ACS 2023 5-year** county **medians**: annual property tax (B25103) and owner-occupied home value (B25077). The implied **effective rate** is **median tax ÷ median value**—a standard county summary statistic, **not** your parcel’s mill levy. Colorado applies **different residential assessment rates** to **school** vs **local government** portions of value; see the Division of Property Taxation overview. Medians can mask wide variation by tax area and property type.

Related official pages

Reference population (context): 330,262