Lake County Property Tax Rates by City, Area, and Tax District 2026
Lake County’s property tax picture reflects California’s Proposition 13 framework, local tax districts, and property-specific assessments. For 2024, the county’s median annual property tax was about $2,369, with an effective rate of approximately 0.72% based on Census-derived data.
Effective Tax Rate
0.72%
Median Property Tax
$2,369
Tax per $100K
$720
Last Update
August 2026
Lake County Property Tax 2026-27
Lake County Property Tax Rate
Lake County property tax rates vary by district in the provided data. Parcel bills can still include fixed charges, parcel taxes, CFD charges, or special assessments depending on the property.
Base rate
1.0000% general ad valorem tax.
District rates
Lake County district rates vary from 1.0000% to 1.4835% in the provided data.
Direct charges
Special assessments and parcel charges are added separately.
Area
Representative Rate
Clearlake (City) / Konocti Unified Zone
1.2600%
Cobb Mountain / Middletown Unified Zone
1.1450%
Countywide-Unitary Base Rate
1.0000%
Hidden Valley Lake District
1.1450%
Kelseyville Unified District Zone
1.0900%
Lakeport (City) / Lakeport Unified Zone
1.1900%
Lucerne / Upper Lake Unified Zone
1.1650%
Middletown Unified District Zone
1.1450%
North Lakeport District
1.1900%
State Unitary Utility Allocation
1.1820%
Unincorporated Area Baseline
1.0000%
Upper Lake Unified District Zone
1.1650%
Other Lake County Property Tools
Tax-rate information is only one part of researching a property. Property search, tax estimation, document-related calculations, and zoning or mapping tools can help users evaluate a parcel from several practical angles.
Lake County Property Search
Search property information by owner name, address, parcel number, city, ZIP code, or other available property filters.
Lake Property Tax Calculator
Estimate potential annual property taxes by combining property value with applicable tax-rate information.
Lake Doc Stamp Calculator
Estimate applicable documentary transfer taxes or related charges associated with qualifying real estate transactions.
Lake County Zoning and Maps
Explore property locations, parcel boundaries, zoning information, maps, and other geographic details for research.
How Property Tax Rates Are Applied in Lake County
Calculating a property tax bill involves more than multiplying a home’s current market price by one countywide percentage. The assessment, applicable tax rate area, local charges, exemptions, and other factors work together to determine the amount billed for a particular parcel.
Assessed Value and Taxable Value
California property taxation generally begins with the assessed value established under state property-tax rules. Taxable value can then reflect qualifying exemptions or other adjustments that affect the amount subject to taxation.
Applying the Property Tax Rate
The applicable rate is applied to the taxable assessment rather than simply to a property’s current asking price or market value. Lake County maintains annual tax-rate information showing the rates associated with its tax codes.
Tax Rate Areas
A tax rate area, or TRA, represents a geographic combination of cities, school districts, and other revenue districts. The exact TRA assigned to a parcel helps determine which tax rates and agencies apply to that property.
Special Assessments and Charges
A tax bill can contain amounts beyond the basic ad valorem property tax. Direct assessments, benefit-zone charges, and other approved assessments may apply to particular properties or areas.
Bonds and Voter-Approved Taxes
Local voters may approve bonded indebtedness that appears as an additional property-tax component. Lake County’s tax-rate records include school and other bond-related rates that vary by applicable tax code.
Annual Tax Bill and Collection
The Treasurer-Tax Collector collects property taxes and associated penalties. For secured real property, the regular annual bill is generally divided into two installments, with the first delinquent after December 10 and the second after April 10, subject to applicable calendar adjustments.
Why Lake County Has Different Tax Districts and Local Rates
Lake County is divided among different local jurisdictions, school systems, and revenue districts. Because each parcel can belong to a different combination of agencies, the total property-tax obligation can vary even between properties located relatively close to one another.
- Separate agencies can levy or receive property-tax revenue for their authorized governmental purposes
- Schools, community facilities, and other public services can involve different taxing or financing arrangements.
- Each TRA reflects a particular geographic combination of taxing jurisdictions applicable to parcels within its boundaries.
- Two parcels can sit close together while belonging to different districts, producing different total charges.
- Voter-approved bonded indebtedness may create additional tax rates beyond the basic property-tax component.
- The property's exact location and assessment characteristics help establish which rates, assessments, and districts apply.
Check Property Tax Rates in Nearby California Counties
Comparing Lake County with surrounding counties can help buyers, homeowners, investors, and researchers put local property-tax costs into broader Northern California context. California Property Checker provides county-specific property information that can support these comparisons and further property research.
Frequently Asked Questions
Does buying a home in Lake County change its assessed value?
A change in ownership can trigger reassessment under California property-tax rules. The resulting assessment may differ substantially from the seller’s previous assessed value, so a buyer should not assume the seller’s tax bill will remain unchanged.
Can my property taxes increase even if I make no improvements?
Yes. Changes to assessed value permitted under California law, changes in applicable tax rates, or new local charges can affect a tax bill. The annual amount is not determined solely by changes to the property’s market price.
What is a supplemental property tax bill?
A supplemental bill can result when a property is reassessed after a qualifying ownership change or new construction. Lake County specifically notes that supplemental taxes are separate from the regular annual property-tax bill and can have different due dates.
When are Lake County property taxes due?
Regular secured property taxes are generally paid in two installments. The first installment is due November 1 and becomes delinquent after December 10, while the second is due February 1 and becomes delinquent after April 10, subject to the county’s official calendar.
What happens if a property tax payment is late?
Late secured-property-tax installments can incur penalties. Lake County states that a 10% penalty applies after the applicable delinquent date, with additional costs or penalties potentially applying as delinquency continues.
Can I challenge my property's assessed value?
Property owners who believe an assessment is incorrect may have options under California assessment-appeal procedures. The appropriate process and deadlines depend on the type of assessment and the circumstances, so owners should verify current requirements with the county assessment authorities.
Can homeowners receive a property tax exemption?
Some property owners may qualify for exemptions or exclusions under California law. Eligibility depends on the specific exemption and the property’s circumstances. The Lake County Assessor determines exemption and exclusion eligibility under applicable California law.
Can new construction affect my property taxes?
Yes. New construction can result in a supplemental assessment for the added improvement. The resulting supplemental tax liability is separate from the property’s regular annual bill and may follow different payment dates.
Where can I verify an actual Lake County property tax bill?
For an official tax bill, payment status, delinquency information, or other tax-collection questions, property owners should use the Lake County Treasurer-Tax Collector’s official resources. The county identifies the Tax Collector as responsible for collecting property taxes and penalties.
Why is my actual tax bill different from an estimated tax calculation?
An estimate may use a countywide effective rate or assumed property value, while an actual bill reflects the parcel’s assessed value, applicable tax rate area, exemptions, direct assessments, bonds, and other charges. Lake County maintains detailed annual tax-rate and assessment records for these parcel-level calculations.