Clayton property tax: where it goes
A Clayton house pays 1.104% of its taxable value in property tax, plus flat charges on the same bill. For a house at $873,551 of value before exemptions with the homeowners' exemption, that's about $10,388 a year.
Tax is levied on net assessed value as of January 1 (assessed value less exemptions); the 1% countywide tax plus the Mt. Diablo 2002, 2010 and 2018 bond, community college bond, BART and East Bay Regional Park District rates.
Who taxes this house
| Taxing agency | Rate | On $873,551 |
|---|---|---|
| Countywide 1% tax (Prop 13) | 1% | $8,666 |
| Mt. Diablo school bonds (MT DIABLO 2002, 2010, 2018 BND) (schools) | 0.0705% | $611 |
| Contra Costa Community College District bonds (schools) | 0.0152% | $132 |
| BART (incl. 2016 bond) | 0.0163% | $141 |
| East Bay Regional Park District | 0.0018% | $16 |
| Clayton citywide landscape maintenance tax (CLYTN CFD 07-1 LMD) | flat | $313 |
| Clayton GHAD (CLAYTON GHAD; varies by parcel) | flat | $305 |
| Mt. Diablo USD Mello-Roos special tax (MT D MELLO ROOS) | flat | $67 |
| Clayton street lighting (CLAYTON ST LT; varies by parcel) | flat | $44 |
| County stormwater charge (FED STORMWATER A-2) | flat | $29 |
| Clayton park community facilities district (CLYTN CFD 06-1 PRK) | flat | $26 |
| SF Bay Restoration Authority parcel tax (Measure AA) | flat | $12 |
| Emergency medical services charge (EMERGENCY MED B) | flat | $10 |
| CCWD land levy (CC WTR LEVY LAND; varies with land value) | flat | $7 |
| East Bay regional trails assessment | flat | $5 |
| Mosquito & vector control | flat | $5 |
| Total | 1.104% | $10,388 |
2026-27 tax year, Contra Costa County (Clayton tax rate area 13015). Exemptions applied: Homeowners' exemption ($7,000).
Ways to pay less
- Seniors, blind or disabled: postpone property taxes. The State Controller's Property Tax Postponement program lets eligible homeowners postpone payment of current-year property taxes on their primary residence. How: Go to www.ptp.sco.ca.gov, call (800) 952-5661 or email postponement@sco.ca.gov.
Dates
| When | What |
|---|---|
| Nov 1 (in 10 days) | First property tax installment coupon dated Nov 1, 2026; after Dec 10, 2026 a 10% late-payment penalty is added. |
| Nov 30, 2026 (in 39 days) | Last day of Contra Costa County's 2026 assessment appeal filing period (opened July 2). |
| Feb 15 | Last day for a first-time homeowners' exemption claim to get the full exemption for that year. |
Pay or manage it
Sources
- Contra Costa County 2026-27 secured property tax bills (look up any parcel at cctax.us)
- California BOE: Homeowners' Exemption
- Contra Costa County assessment parcels: median assessed value, Clayton tax rate area 13015
- Contra Costa County assessment parcels: Clayton single-family parcels by use code
- Contra Costa County assessment parcels: Clayton single-family parcels by tax rate area
- SF Bay Restoration Authority Measure AA (NBS parcel tax info)
- California BOE letter: 2026 assessment appeal filing periods by county
Checked October 22, 2026. Every number here comes from the public sources listed, matched by our checker.
Rates change every year; this page shows when it was last checked. Nothing here is legal, tax or insurance advice.