Google street view image for 840 Stone Valley Rd, Alamo, CA 94507

Off market jun 1989 for $215K

$2,791,406

Est. refi paymentEst. refi $1,468/mo

•

4 ba

•

4,035

sq ft

840 Stone Valley Rd, Alamo, CA 94507

About this home

840 Stone Valley Rd is a 4,035 square foot house on a 0.74 acre lot with 4 bedrooms and 4 bathrooms. - it last sold on June 09, 1989 for $215,000. Based on Redfin's Alamo data, we estimate the home's value is $2,791,406.

Single-familyProperty Type

1997Year Built

0.74 acresLot Size

$692Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$2,791,406

$2.6M since sold in June 1989$1,000 since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 2.3% lower than the average sale price ($2.86M) of 6 comparable homes.

SOLD JUN 30, 2026
$2,650,000
A
4 beds3.5 baths3,893 sq ft
2358 Stone Valley Rd, Alamo, CA 94507
SOLD AUG 7, 2026
$3,400,000
B
4 beds3.5 baths4,329 sq ft
16 Ardendale Ct, Alamo, CA 94507
SOLD JUL 20, 2026
$2,834,000
C
4 beds3.5 baths3,131 sq ft
2763 Falcon View Ct, Alamo, CA 94507
SOLD JUN 5, 2026
$3,350,000
D
4 beds3.5 baths3,477 sq ft
4 Wing Set Pl, Alamo, CA 94507
SOLD AUG 17, 2026
$1,860,000
E
4 beds3.5 baths3,276 sq ft
1290 Laverock Ln, Alamo, CA 94507
SOLD MAY 20, 2026
728 Anderson Ranch Ct, Alamo, CA 94507
$3,054,893
F
4 beds3.5 baths3,808 sq ft
728 Anderson Ranch Ct, Alamo, CA 94507

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Earn from this home

Sell

$2,643,857

Est. take-home

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Est. cash available

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Rent

$7,962/mo

Redfin rental estimate

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Market trends in 94507, CA

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

101.6%

0.3% MoM

Median sale price

$3.2M

$199K MoM

Avg. days on market

24d

3 days MoM

Recently sold homes

5 MoM

New listings for sale

COMING SOON
$8,500,000
12 beds6.5 baths8,699 sq ft
512 Hemme Ave, Alamo, CA 94507
OPEN THU, 11AM TO 2PM
$2,749,000
4 beds3.5 baths3,752 sq ft
86 Royal Ridge Ct, Alamo, CA 94507
OPEN THU, 10:30AM TO 1:30PM
$2,599,000
4 beds3 baths2,423 sq ft
270 La Serena Ave, Alamo, CA 94507
OPEN SUN, 2PM TO 4PM
$850,000
2 beds2.5 baths1,757 sq ft
318 Alamo Sq, Alamo, CA 94507
COMING SOON
$3,898,000
5 beds4.5 baths4,525 sq ft
370 Golden Grass Dr, Alamo, CA 94507
OPEN THU, 11AM TO 1:30PM
$3,499,000
5 beds5 baths3,678 sq ft
2973 Limestone Rd, Alamo, CA 94507
COMING SOON
$6,790,000
5 beds5.5 baths5,135 sq ft
10 Corwin Dr, Alamo, CA 94507
COMING SOON
$3,799,000
4 beds3.5 baths3,482 sq ft
1993 Green Valley Rd, Alamo, CA 94507
$1,275,000
3 beds2 baths1,891 sq ft
136 Sugarloaf Ct, Alamo, CA 94507
$1,495,000
3 beds3 baths4,026 sq ft
337 Livorna Heights Rd, Alamo, CA 94507
See all

Provided by Redfin

Sale history for 840 Stone Valley Rd

Year

Property tax

Land + Additions

Assessment*

2025

$12,435 (+2.1%)

$373,239 + $706,415

$1,079,654

2024

$12,179 (+1.6%)

$365,921 + $692,564

$1,058,485

2023

$11,988 (+0.8%)

$358,747 + $678,985

$1,037,732

2022

$11,899 (+2.2%)

$351,713 + $665,672

$1,017,385

2021

$11,643 (+1.4%)

$344,817 + $652,620

$997,437

2020

$11,477 (+1.1%)

$338,056 + $639,824

$977,880

2019

$11,350 (+3.9%)

$334,590 + $633,264

$967,854

2018

$10,926 (+3.8%)

$328,030 + $620,848

$948,878

2017

$10,527 (+1.3%)

$315,294 + $596,741

$912,035

2016

$10,395 (+1.3%)

$315,294 + $596,741

$912,035

2015

$10,263 (+1.4%)

$309,112 + $585,041

$894,153

2014

$10,124 (+1.2%)

$298,505 + $564,966

$863,471

2013

$10,004 (+3.1%)

$298,505 + $564,966

$863,471

2012

$9,705 (+1.9%)

$297,156 + $562,413

$859,569

2011

$9,523 (+1.3%)

$291,330 + $551,386

$842,716

2010

$9,400 (−0.1%)

$285,618 + $540,575

$826,193

2009

$9,413 (+3.4%)

$283,484 + $536,535

$820,019

2008

$9,101

$284,158 + $537,810

$821,968

Tax history for 840 Stone Valley Rd

Year

Property tax

Land + Additions

Assessment*

2025

$12,435 (+2.1%)

$373,239 + $706,415

$1,079,654

2024

$12,179 (+1.6%)

$365,921 + $692,564

$1,058,485

2023

$11,988 (+0.8%)

$358,747 + $678,985

$1,037,732

2022

$11,899 (+2.2%)

$351,713 + $665,672

$1,017,385

2021

$11,643 (+1.4%)

$344,817 + $652,620

$997,437

2020

$11,477 (+1.1%)

$338,056 + $639,824

$977,880

2019

$11,350 (+3.9%)

$334,590 + $633,264

$967,854

2018

$10,926 (+3.8%)

$328,030 + $620,848

$948,878

2017

$10,527 (+1.3%)

$315,294 + $596,741

$912,035

2016

$10,395 (+1.3%)

$315,294 + $596,741

$912,035

2015

$10,263 (+1.4%)

$309,112 + $585,041

$894,153

2014

$10,124 (+1.2%)

$298,505 + $564,966

$863,471

2013

$10,004 (+3.1%)

$298,505 + $564,966

$863,471

2012

$9,705 (+1.9%)

$297,156 + $562,413

$859,569

2011

$9,523 (+1.3%)

$291,330 + $551,386

$842,716

2010

$9,400 (−0.1%)

$285,618 + $540,575

$826,193

2009

$9,413 (+3.4%)

$283,484 + $536,535

$820,019

2008

$9,101

$284,158 + $537,810

$821,968

*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/residential/r/new single family-duplex

Construct a new single-family home with an attached garage.

New construction

Jan 30, 2010 • Final

Building/commercial/d/demolition

Demolish a cottage.

Demolition

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

Heating & Cooling
Air Conditioning Type: Window Unit
Heating Type: Wall Furnace

Room Information
# of Rooms: 12

Exterior

Exterior Information
Physical Condition: Average
Foundation Type: Raised W/Crawlspace
Building Construction Quality: Average
Exterior Wall: Wood Siding

Pool Information
Has Pool

Property Information
Subdivision Name: SAN RAMON RHO
Living Sq. Ft: 4,035
Ground Floor Sq. Ft: 2,411
Building Sq. Ft: 4,035
# of Stories: 2
Legal Description: POR RO SAN RAMON

Parking & Garage Information
Garage/Parking Sq. Ft: 824

Lot Information
# of Buildings: 1
Land Sq. Ft: 32,200
Acres: 0.7392
Zoning Code: R-20
County Use Description: SINGLE FAMILY

Utility Information
Sewer Type: Public
Water Service Type: Public

Financial

Assessor Information
Assessment Year: 2026

Public facts

Beds: 4
Baths: 4.0
Sq. Ft.: 4,035
Stories: 2.0
Lot Size: 0.74 acres
Style: Single Family Residential
Year Built: 1997
Year Renovated: 1998
County: Contra Costa County
APN: 1921420301

Home facts updated by county records on Oct 10, 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 • 2.0mi

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

3/10 Heat Factor

8 days above 93° expected this year, 16 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)

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

$2.65M – $3.21M

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Nearby similar homes

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New listings for sale in 94507

COMING SOON

$8,500,000

12 beds6.5 baths8,699 sq ft

512 Hemme Ave, Alamo, CA 94507

OPEN THU, 11AM TO 2PM

$2,749,000

4 beds3.5 baths3,752 sq ft

86 Royal Ridge Ct, Alamo, CA 94507

OPEN THU, 10:30AM TO 1:30PM

$2,599,000

4 beds3 baths2,423 sq ft

270 La Serena Ave, Alamo, CA 94507

OPEN SUN, 2PM TO 4PM

$850,000

2 beds2.5 baths1,757 sq ft

318 Alamo Sq, Alamo, CA 94507

COMING SOON

$3,898,000

5 beds4.5 baths4,525 sq ft

370 Golden Grass Dr, Alamo, CA 94507

OPEN THU, 11AM TO 1:30PM

$3,499,000

5 beds5 baths3,678 sq ft

2973 Limestone Rd, Alamo, CA 94507

COMING SOON

$6,790,000

5 beds5.5 baths5,135 sq ft

10 Corwin Dr, Alamo, CA 94507

COMING SOON

$3,799,000

4 beds3.5 baths3,482 sq ft

1993 Green Valley Rd, Alamo, CA 94507

$1,275,000

3 beds2 baths1,891 sq ft

136 Sugarloaf Ct, Alamo, CA 94507

Home values near 840 Stone Valley Rd

Data from public records.

Address	Redfin Estimate
836 Stone Valley Road, Alamo, CA 6 Beds \| 2 Baths \| 2592 Sq. Ft.	$2,195,618
2110 Stone Valley Road, Alamo, CA 5 Beds \| 4.5 Baths \| 4477 Sq. Ft.	$2,970,623

Address	Redfin Estimate
2100 Stone Valley Road, Alamo, CA 3 Beds \| 2 Baths \| 1910 Sq. Ft.	$2,371,822
111 Megan Court, Alamo, CA 4 Beds \| 3.5 Baths \| 4853 Sq. Ft.	$4,311,331

Address	Redfin Estimate
940 Stone Valley Road, Alamo, CA 3 Beds \| 1 Baths \| 1864 Sq. Ft.	$1,946,125
3164 Miranda Avenue, Alamo, CA 5 Beds \| 2.5 Baths \| 2532 Sq. Ft.	$2,311,977

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Earn from this home

Market trends in 94507, CA

Sale history for 840 Stone Valley Rd

Tax history for 840 Stone Valley Rd

Permits

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 94507

Home values near 840 Stone Valley Rd

More real estate resources