23 RANCHITOS DEL SOL DIABLO CA 94528, DIABLO, CA 94528
Tax Assessment & Valuation
The 2025 property tax bill for 23 Ranchitos del Sol was $26,126.
Source: Contra Costa County assessment roll, as of July 14, 2026
Property Jurisdictions
Type
Name
State
California
County
Contra Costa County
Unified School District
San Ramon Valley Unified School District (KG - 12)
Tax Bill & Assessment History
Year
Tax Bill
Assessed Value
2026
$2,292,983 (+2%)Land $1,569,712Building $723,271
2025
$26,126.00
$2,248,024Land $1,538,934Building $709,090
2023
$25,196.00 (+0.81%)
$2,160,732Land $1,479,176Building $681,556
2022
$24,994.00
Assessed value is set for property tax purposes and is not a market price estimate.
Flood
FEMA maps place 23 Ranchitos del Sol in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2017.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
FEMA Flood Zone
Zone X minimal risk
Flood Insurance Requirement
Not required lenders may require it
Flood Insurance Cost
Premium on File median of 18 policies
Community Rating System
Class 6 (20% premium discount)
Nearby Flood Policies
18 in force
Nearby Flood Claims
1 (2017)
Claims Outside the SFHA
1 of 1
Most Recent Claim
Feb 2017 · Severe Winter Storms, Flooding, And Mudslides
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire
Wildfire risk around 23 Ranchitos del Sol is high, ranking above 70% of the US, with a 0.3% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
Wildfire Risk
High above 70% of the US · above 45% of California
Wildfire Likelihood
0.3% annual chance
Exposure
Indirect within ember reach
Adjoins Burnable Land
Yes
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Drinking Water
Source: EPA Safe Drinking Water Information System, as of September 2026
Water System
EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005
Water Source
Surface water
Last State Inspection
Dec 2021
Lead
Under 1 ppb (2022–2024) action level 15 ppb
Violations Reported to EPA
Water Quality
None last 10 years
Treatment and Procedure
None last 10 years
Monitoring and Reporting
None last 3 years
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.
Internet Providers
Source: FCC Broadband Data Collection, based on 153 locations within half a mile, as of December 31, 2025