940 Stone Valley Rd is a 1,864 square foot house on a 6.9 acre lot with 3 bedrooms and 1 bathroom. Based on Redfin's Alamo data, we estimate the home's value is $1,946,125.
Single-familyProperty Type
1920Year Built
6.9 acresLot Size
$1,044Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,946,125
$13K since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 8.6% lower than the average sale price ($2.13M) of 6 comparable homes.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2025
$12,339 (+2.1%)
$1,009,654 + $53,840
$1,063,494
2024
$12,087 (+1.6%)
$989,857 + $52,785
$1,042,642
2023
$11,899 (+0.7%)
$970,449 + $51,750
$1,022,199
2022
$11,812 (+2.2%)
$951,421 + $50,736
$1,002,157
2021
$11,559 (+1.4%)
$932,766 + $49,742
$982,508
2020
$11,395 (+1.1%)
$914,477 + $48,767
$963,244
2019
$11,270 (+3.9%)
$905,101 + $48,267
$953,368
2018
$10,850 (+3.8%)
$887,354 + $47,321
$934,675
2017
$10,455 (+1.3%)
$852,898 + $45,485
$898,383
2016
$10,325 (+1.3%)
$852,898 + $45,485
$898,383
2015
$10,195 (+27.0%)
$836,175 + $44,594
$880,769
2014
$8,025 (+64.0%)
$624,526 + $41,679
$666,205
2013
$4,894 (+3.2%)
$624,526 + $41,679
$666,205
2012
$4,740 (+2.1%)
$347,828 + $39,420
$387,248
2011
$4,642 (+1.6%)
$341,008 + $38,648
$379,656
2010
$4,570 (−0.1%)
$334,322 + $37,891
$372,213
2009
$4,576 (+3.9%)
$331,824 + $37,608
$369,432
2008
$4,405
$332,613 + $37,698
$370,311
Tax history for 940 Stone Valley Rd
Year
Property tax
Land + Additions
Assessment*
2025
$12,339 (+2.1%)
$1,009,654 + $53,840
$1,063,494
2024
$12,087 (+1.6%)
$989,857 + $52,785
$1,042,642
2023
$11,899 (+0.7%)
$970,449 + $51,750
$1,022,199
2022
$11,812 (+2.2%)
$951,421 + $50,736
$1,002,157
2021
$11,559 (+1.4%)
$932,766 + $49,742
$982,508
2020
$11,395 (+1.1%)
$914,477 + $48,767
$963,244
2019
$11,270 (+3.9%)
$905,101 + $48,267
$953,368
2018
$10,850 (+3.8%)
$887,354 + $47,321
$934,675
2017
$10,455 (+1.3%)
$852,898 + $45,485
$898,383
2016
$10,325 (+1.3%)
$852,898 + $45,485
$898,383
2015
$10,195 (+27.0%)
$836,175 + $44,594
$880,769
2014
$8,025 (+64.0%)
$624,526 + $41,679
$666,205
2013
$4,894 (+3.2%)
$624,526 + $41,679
$666,205
2012
$4,740 (+2.1%)
$347,828 + $39,420
$387,248
2011
$4,642 (+1.6%)
$341,008 + $38,648
$379,656
2010
$4,570 (−0.1%)
$334,322 + $37,891
$372,213
2009
$4,576 (+3.9%)
$331,824 + $37,608
$369,432
2008
$4,405
$332,613 + $37,698
$370,311
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Jan 30, 2010 • Final
Building/commercial/mic/misc.
Work on a monument sign.
Electrical
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property details
Interior
Room Information
# of Rooms: 8
Exterior
Property Information
Subdivision Name: SAN RAMON RHO
Living Sq. Ft: 1,864
Ground Floor Sq. Ft: 1,864
Building Sq. Ft: 1,864
# of Stories: 1
Legal Description: POR RO SAN RAMON
Parking & Garage Information
Garage/Parking Sq. Ft: 1,173
Lot Information
# of Buildings: 1
Land Sq. Ft: 300,520
Acres: 6.899
Zoning Code: R-20
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 1.0
Sq. Ft.: 1,864
Stories: 1.0
Lot Size: 6.9 acres
Style: Single Family Residential
Year Built: 1920
Year Renovated: 1936
County: Contra Costa County
APN: 1921420319
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Rancho Romero Elementary School
Public K-5 • Assigned • 1.0mi
9/10
Stone Valley Middle School
Public 6-8 • Assigned • 0.3mi
10/10
Monte Vista High School
Public 9-12 • Assigned • 2.1mi
10/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
4/10 Fire Factor
2% chance of being in a wildfire in next 30 years
4/10 Heat Factor
8 days above 93° expected this year, 17 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
9/10 Air Factor
17 unhealthy days expected this year, 17 days in 30 years
Provided by First Street
Historical weather
Alamo, CA • 94507
Average low and high temperatures (°F)
58
39
61
42
68
46
68
47
74
51
80
54
82
56
86
58
81
59
76
53
62
44
56
43
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 11.5 hours in
June and 4.9 hours in December, placing it above the
U.S. average for solar exposure.
11.5 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$1.85M – $2.24M
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