Property tax rates in Ventura County are made up of a base 1% under Proposition 13 plus voter-approved bonds and special assessments (including Mello-Roos in newer developments). The total effective rate varies by city and even by neighborhood within a city. I'm Brian Cooper, REALTOR at eXp Realty (DRE# 01434286), and this page is a practical reference for understanding what tax rates you'll actually pay across Ventura County in 2026.
How California Property Tax Actually Works
California's Proposition 13 sets the base property tax rate at 1% of assessed value. The assessed value is initially the purchase price, then increases by no more than 2% per year unless the property changes ownership (which triggers reassessment).
On top of the 1% base, voter-approved bonds add additional rates. These bonds fund school construction, infrastructure, and other public projects approved by local elections. Bond rates expire as the bonds are paid off and new ones are added through new elections.
Mello-Roos special assessments are common in newer developments. They fund infrastructure and amenities for specific communities. Mello-Roos can add significant additional tax and typically runs for 20-30+ years before sunsetting.
The total tax bill is base + bonds + special assessments. Always verify the specific parcel's actual tax record rather than assuming a city-wide rate.
Typical Ventura County City Effective Rates (May 2026)
Here are typical effective tax rates by Ventura County city, excluding Mello-Roos add-ons. These are starting estimates; verify specific parcels.
| City | Typical Effective Rate | Notes |
|---|---|---|
| Simi Valley | 1.10% - 1.25% | Mello-Roos in some newer tracts adds significantly |
| Thousand Oaks | 1.10% - 1.20% | Lower bond burden in older areas |
| Westlake Village (Ventura side) | 1.10% - 1.20% | Crosses into LA County at boundary |
| Camarillo | 1.15% - 1.35% | Mello-Roos common in newer tracts |
| Moorpark | 1.20% - 1.50% | Mello-Roos common in newer developments |
| Newbury Park (TO) | 1.10% - 1.20% | Part of Thousand Oaks |
| Oxnard | 1.15% - 1.35% | Varies by sub-area |
| Ventura (city) | 1.10% - 1.30% | Established areas lower |
| Ojai | 1.10% - 1.25% | Established area, lower bond burden |
Mello-Roos: Where It Lives in Ventura County
Mello-Roos special assessments are most common in newer master-planned communities. In Ventura County, Mello-Roos typically appears in parts of Moorpark (some newer developments), parts of Camarillo (newer tracts like Spanish Hills extensions), parts of Simi Valley (newer Wood Ranch areas and Big Sky), and parts of newer Westlake Village construction.
Mello-Roos can add 0.5%-1.5% to the effective tax rate. On a $1.4M home, that's $7,000-$21,000 per year on top of the base tax. Over 20-30 years, the cumulative cost is meaningful.
Sellers must disclose Mello-Roos status in disclosures. Buyers should review the actual assessment, the bond amount remaining, and the sunset year. The CFD (Community Facilities District) records show the specifics.
How to Verify a Specific Parcel's Tax
The Ventura County Assessor maintains tax records for every parcel. The records show the assessed value (which dictates the base 1%), any voter-approved bonds applicable to the area, and any special assessments including Mello-Roos.
Verification: search the Ventura County Assessor website by APN (Assessor's Parcel Number) or address, review the current tax bill, and note any special assessments listed. The county also publishes a Direct Assessment listing that breaks out individual bonds and assessments.
I run this verification for every buyer client before contingency removal. The actual tax burden is part of the affordability decision.
Reassessment at Sale
When a property sells in California, the assessed value is reset to the purchase price (with some exceptions for transfers between related parties or under Proposition 19 for over-55 transfers). This means the new buyer's tax is based on the new purchase price, not the previous owner's much-lower assessment.
Example: a Thousand Oaks home purchased in 1995 for $400K might have a current assessed value of $700K under Prop 13's 2% annual cap. If the new buyer pays $1.4M, the assessment resets to $1.4M and the tax doubles. New buyers should always estimate tax based on their purchase price, not the seller's existing tax.
- Property tax resets to purchase price at sale
- New buyer's tax based on new assessment
- Old assessment irrelevant to new tax
- Exceptions: Prop 19 transfers, related-party transfers
- Estimate at 1.1%-1.5% of purchase price for budgeting
Special Cases: Older Homes With Low Assessments
Some Ventura County homes have been owned by the same family for decades and carry very low assessed values relative to current market value. The seller's tax bill of $4,500/year is irrelevant to the buyer's projected $15,000/year tax at the new purchase price.
I always include the projected new tax bill in the buyer's net sheet to avoid surprises. The difference can be $10,000+ annually.
Comparing Across Counties
Ventura County effective rates are generally similar to or slightly lower than LA County effective rates. The base 1% is statewide under Prop 13, so differences come from bonds and special assessments.
Buyers crossing the LA/Ventura line (Westlake Village, parts of Calabasas) should compare actual parcel tax records rather than assume rate similarity. The differences are typically modest but not always.
Practical Budgeting Rule
For Ventura County budget estimation, plan for total effective tax of 1.10% to 1.25% of purchase price in most established areas, 1.20% to 1.50% in areas with significant voter-approved bonds, and 1.50% to 2.50% in Mello-Roos communities.
Confirm with the specific parcel tax record before contingency removal.
Frequently Asked Questions
What is the property tax rate in Ventura County?
The base is 1% of assessed value under California Proposition 13. Voter-approved bonds add typically 0.1%-0.4%. Mello-Roos special assessments (where applicable) can add 0.5%-1.5% more. Total effective rates commonly run 1.1%-2.5% depending on city and neighborhood.
What is Mello-Roos?
A special assessment that funds infrastructure and amenities in specific communities, typically newer master-planned developments. Can add 0.5%-1.5% to the effective tax rate and typically runs 20-30+ years before sunsetting. Sellers must disclose Mello-Roos status.
Where in Ventura County is Mello-Roos most common?
Parts of Moorpark (newer developments), parts of Camarillo (newer tracts), parts of Simi Valley (newer Wood Ranch and Big Sky areas), and parts of newer Westlake Village construction.
Does the previous owner's tax tell me what I'll pay?
No. California property tax resets to the purchase price at sale. A seller's $4,500/year tax can become $15,000/year for the new buyer when the assessment resets to a higher purchase price. Always estimate based on your purchase price.
What is the typical Simi Valley property tax rate?
Approximately 1.10%-1.25% of assessed value for most parcels, with Mello-Roos add-ons in newer Wood Ranch and Big Sky tracts that can push effective rates significantly higher.
What is the typical Thousand Oaks property tax rate?
Approximately 1.10%-1.20% of assessed value for most parcels. Generally lower bond burden than Mello-Roos areas.
How do I verify a specific parcel's tax?
Search the Ventura County Assessor website by APN or address. The record shows assessed value, voter-approved bonds, and special assessments. The Direct Assessment listing breaks out individual line items.
Does Brian Cooper verify tax for buyers?
Yes. I run parcel-specific tax verification before contingency removal for every buyer client. The projected new tax bill goes into the buyer's net sheet.
