Embrace the pinnacle of luxury living on this spectacular 5.12-acre homesite. Perfect for a premier estate, this rare property comes complete with a schematic plan and a sprawling, versatile building pad primed for your architectural vision. Drink in panoramic, 360-degree vistas of Mount Diablo and the surrounding valley from your future private sanctuary. On-site utilities, ample space for a multi-generational ADU, and room for a custom barn make this an unparalleled canvas. Best of all, you are just a leisurely golf cart ride away from the historic Diablo Country Club clubhouse. Start living the Diablo lifestyle.
Mount Diablo Estate Park, located between Mount Diablo State Park and the Diablo Country Club, is a residential and park-adjacent Diablo neighborhood with oak-studded hillsides and winding private lanes. Character concentrates at the Diablo Road and Green Valley Road junction, where a quiet, equestrian-leaning atmosphere replaces storefront bustle. Architecture trends toward large, custom homes with long driveways, stone accents, and views framed by mature trees. Trailheads and open-space edges shape daily routines, with quick transitions from pavement to ridge-line paths. The Diablo Country Club clubhouse and grounds act as a central social landmark. The nearby Acalanes Ridge Open Space and Mount Diablo’s foothill corridors keep the setting distinctly outdoors-first.
Provided by Walk Score and Local Logic
Property details
Exterior
Exterior features
Premium lot
Horses allowed
Home design
Unimproved land
Utilities
Public water
Public sewer
Electricity connected
Sewer on site
Water connected
Sale and tax history for 0 Caballo Ranchero
Sale History
Tax History
Date
Event
Price
bridgeMLS, Bay East AOR, or Contra Costa AOR #41153455
Nov 10, 2026
Listed
$2,250,000
Public Records
Jul 22, 2026
Sold
$3,700,000
bridgeMLS, Bay East AOR, or Contra Costa AOR #41084211
Dec 8, 2025
Listing Removed
—
bridgeMLS, Bay East AOR, or Contra Costa AOR #41020872
Feb 7, 2024
Listing Removed
—
Public Records
Dec 10, 2019
Sold
$4,000,000
Year
Property tax
Land + Additions
Assessment*
2026
$239 (+2.9%)
$5,576
2025
$232 (+2.6%)
$5,576
2024
$226 (+2.4%)
$5,467
2023
$221 (+2.2%)
$5,360
2022
$216 (+2.5%)
$5,255
2021
$211 (+2.1%)
$5,152
2020
$207 (+29.4%)
$5,051
2019
$160 (+2.8%)
$5,000
2018
$155 (+12.9%)
$1,104
2017
$138
$1,062
Public record
Beds
—
Baths
—
Stories
—
Lot width
—
Lot depth
—
Lot size
0.55 Acres
Year renovated
—
Finished Sq. Ft.
—
Unfinished Sq. Ft.
—
Total Sq. Ft.
—
Year built
—
Style
Vacant Land
County
Contra Costa County
APN
1953510011
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Oct 30, 2026.
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
6/10 Fire Factor
10% chance of being in a wildfire in next 30 years
3/10 Heat Factor
7 days above 95° expected this year, 14 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
8/10 Air Factor
14 unhealthy days expected this year, 15 days in 30 years
Provided by First Street
Historical weather
Diablo, CA • 94528
Average low and high temperatures (°F)
59
41
62
43
69
47
68
48
75
51
80
54
83
56
86
58
81
60
72
53
62
46
57
43
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
94/ 100
Exceptional sunlight
Sunscore
This home ranks in the top 1% for direct sun exposure in Diablo. There appears to be minimal shading by surrounding buildings, terrain, and vegetation.
9.5 hrs
6.7 hrs
JuneDecember
Provided by Shadowmap
Redfin Estimate for 0 Caballo Ranchero
$2,200,850
$49K under list price of $2.25M
Nearby comparable homes
The Redfin Estimate uses 6 recent nearby sales, priced between $2.0M to $2.8M.