OFF MARKET

Off Market Oct 2007 for $1.3M

$4,218,210

Est. refi paymentEst. refi $8,023/mo

•

4 ba

•

2,070

sq ft

21 OAK VALLEY Rd, San Mateo, CA 94402

About this home

Single-familyProperty Type

1957Year Built

0.31 acresLot Size

$2,038Est. Price/Sq.Ft.

2 car garageParking

Listed by Jodi Campion •DRE #01357206 • Compass

Contact: (650) 430-4556

Bought with Jolaine Woodson •DRE #01080402 • Alain Pinel Realtors

Redfin checked: 2 minutes ago

•Source:MLSListings #ML80752901

Redfin Estimate

$4,218,210

$2.9M since sold in October 2007$38K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 27.6% higher than the average sale price ($3.31M) of 6 comparable homes.

SOLD JAN 12, 2026
$2,550,000
A
3 beds2.5 baths2,140 sq ft
897 Parrott Dr, San Mateo, CA 94402
SOLD NOV 19, 2025
$2,815,000
B
4 beds3 baths2,260 sq ft
18 Wildwood Dr, San Mateo, CA 94402
SOLD AUG 10, 2026
$3,250,000
C
3 beds2.5 baths2,460 sq ft
523 Iowa Dr, San Mateo, CA 94402
SOLD JUL 30, 2026
$3,610,000
D
3 beds3 baths2,450 sq ft
401 Castilian Way, San Mateo, CA 94402
SOLD MAY 29, 2026
$3,805,000
E
4 beds3 baths2,880 sq ft
678 Barneson Ave, San Mateo, CA 94402
SOLD MAY 11, 2026
$3,800,000
F
5 beds3 baths2,450 sq ft
606 Yale Dr, San Mateo, CA 94402

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Earn from this home

Sell

$3,440,754

Est. take-home

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Est. cash available

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Rent

$8,285/mo

Redfin rental estimate

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Market trends in 94402, CA

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

106.6%

0.5% MoM

Median sale price

$2.5M

$129K MoM

Avg. days on market

12d

0 days MoM

Recently sold homes

6 MoM

New listings for sale

OPEN SAT, 2PM TO 4PM
$2,398,000
4 beds3 baths1,930 sq ft
1227 Rhus St, San Mateo, CA 94402
$7,500,000
4 beds3.5 baths3,802 sq ft
128 Clark Dr, San Mateo, CA 94402
OPEN SAT, 1:30PM TO 4PM
$1,885,000
3 beds2.5 baths1,930 sq ft
1800 Randall Rd, San Mateo, CA 94402
EARLY ACCESS
$8,000,000
5 beds5 baths4,275 sq ft
709 Hurlingham Ave, San Mateo, CA 94402
$4,999,000
4 beds3.5 baths3,380 sq ft
342 Parrott Dr, San Mateo, CA 94402
OPEN SAT, 1PM TO 4PM
$4,595,000
4 beds3.5 baths2,720 sq ft
36 Belford Way, San Mateo, CA 94402
$2,297,000
4 beds3 baths2,300 sq ft
940 S Idaho St, San Mateo, CA 94402
HOT HOME
$3,695,000
4 beds3 baths2,565 sq ft
210 Avila Rd, San Mateo, CA 94402
VIDEO TOUR
$4,498,000
3 beds2 baths2,190 sq ft
1586 Lexington Ave, San Mateo, CA 94402
$1,900,000
2 beds4 baths3,325 sq ft
414 East 16th Ave, San Mateo, CA 94402
See all

Provided by Redfin

Sale history for 21 OAK VALLEY Rd

Year

Property tax

Land + Additions

Assessment*

2025

$21,729 (+0.8%)

$909,709 + $909,709

$1,819,418

2024

$21,561 (+2.7%)

$891,872 + $891,872

$1,783,744

2023

$21,004 (+1.2%)

$874,385 + $874,385

$1,748,770

2022

$20,762 (+1.4%)

$857,241 + $857,241

$1,714,482

2021

$20,479 (+4.3%)

$840,433 + $840,433

$1,680,866

2020

$19,631 (+2.9%)

$823,954 + $823,954

$1,647,908

2019

$19,073 (+3.7%)

$815,506 + $815,506

$1,631,012

2018

$18,401 (+2.8%)

$799,516 + $799,516

$1,599,032

2017

$17,894 (+1.3%)

$768,471 + $768,471

$1,536,942

2016

$17,657 (+2.6%)

$768,471 + $768,471

$1,536,942

2015

$17,215 (+2.4%)

$753,403 + $753,403

$1,506,806

2014

$16,814 (+21.8%)

$727,551 + $727,551

$1,455,102

2012

$13,800 (+0.2%)

$675,000 + $675,000

$1,350,000

2011

$13,775 (−11.8%)

$600,000 + $600,000

$1,200,000

2010

$15,621 (+0.6%)

$696,140 + $696,140

$1,392,280

2009

$15,522 (+2.1%)

$690,938 + $690,938

$1,381,876

2008

$15,205

$692,580 + $692,580

$1,385,160

Tax history for 21 OAK VALLEY Rd

Year

Property tax

Land + Additions

Assessment*

2025

$21,729 (+0.8%)

$909,709 + $909,709

$1,819,418

2024

$21,561 (+2.7%)

$891,872 + $891,872

$1,783,744

2023

$21,004 (+1.2%)

$874,385 + $874,385

$1,748,770

2022

$20,762 (+1.4%)

$857,241 + $857,241

$1,714,482

2021

$20,479 (+4.3%)

$840,433 + $840,433

$1,680,866

2020

$19,631 (+2.9%)

$823,954 + $823,954

$1,647,908

2019

$19,073 (+3.7%)

$815,506 + $815,506

$1,631,012

2018

$18,401 (+2.8%)

$799,516 + $799,516

$1,599,032

2017

$17,894 (+1.3%)

$768,471 + $768,471

$1,536,942

2016

$17,657 (+2.6%)

$768,471 + $768,471

$1,536,942

2015

$17,215 (+2.4%)

$753,403 + $753,403

$1,506,806

2014

$16,814 (+21.8%)

$727,551 + $727,551

$1,455,102

2012

$13,800 (+0.2%)

$675,000 + $675,000

$1,350,000

2011

$13,775 (−11.8%)

$600,000 + $600,000

$1,200,000

2010

$15,621 (+0.6%)

$696,140 + $696,140

$1,392,280

2009

$15,522 (+2.1%)

$690,938 + $690,938

$1,381,876

2008

$15,205

$692,580 + $692,580

$1,385,160

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Public record

Public record
Zoning

Beds

Baths

Stories

Lot width

—

Lot depth

—

Lot size

0.29 Acres

Year renovated

1980

Sq. Ft.

2,290

Year built

1957

Style

Single Family Residential

County

San Mateo County

APN

038211090

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Sep 2, 2026.

R1B

Single-Family Residence Districts

The R1 Single-Family Residence Districts are intended to create, preserve and enhance areas suitable for single-family dwellings with a substantial presence of open space and opportunities for outdoor living. The R1 districts are intended to protect the character and variety of neighborhoods, preserve privacy and prevent burdens on public facilities, while allowing reasonable housing opportunities for families.

Permitted uses

Include but are not limited to:

Day care facility
Housing-Single unit
Housing-Mobile home park

Property details

Parking

Parking Information
Garage (Minimum): 2
Garage (Maximum): 2
Garage Spaces: 2

Interior

Virtual Tour

Bedroom Information
# of Bedrooms (Minimum): 4
# of Bedrooms (Maximum): 4
Bedrooms: Primary Suite/Retreat

Bathroom Information
# of Baths (Minimum): 4
Bathroom Description: 2+ Showers Over Tubs, 2+ Tubs, 2+ Stall Shower

Room Information
Bonus/Hobby Room, Formal Entry, Storage
Family Room Description: Separate Family Room
Dining Room Description: Dining Area in Living Room, No Informal Dining Room
Kitchen Description: Dishwasher, Cooktop, Refrigerator(s), Microwave, Oven (Self Cleaning), Oven (Built-In), 220 Volt Outlet, Hookups (Gas)

Interior Features
Laundry: In Laundry Room, Dryer, Washer, Hookup (Gas Dryer), 220 Volt Outlet
Flooring: Tile, Hardwood, Vinyl/Linoleum

Fireplace Information
Fireplace Description: In Living Room, Wood-Burning, Fireplace Available

Heating & Cooling Information
Heating: Gas

Exterior

Exterior Features
View: Mountains, Local/Neighborhood
Roof: Composition
Yard/Grounds: Sprinkler(s) (Front), Sprinkler(s) (Auto), Deck

Building Information
Style: Contemporary
Subclass: Single Family Home
Building Type: Detached
Post & Pier, Concrete Perimeter and Slab

Property Features
Amenities: Window Covering(s), Double Pane Windows(s), High Ceiling
Communication: Cable TV Available
Living Sq. Ft.: 2,070

Property Information
Property Primary ID: 79929

Lot Information
Lot Size Area Minimum Units: Sq. Ft.
Lot Size Area Maximum Units: Sq. Ft.
Lot Size Source: Assessor
Zoning: R100

Utilities

Utility Information
Energy Features: Double Pane Windows, Skylight(s)
Sewer Septic: Sewer in Street, Sewer Connected

Water Information
Water: Heater (Gas), Public

Location

School Information
Elementary School District: San Mateo-Foster City Elementary
High School District: San Mateo Union High

Public facts

Beds: 3
Baths: 4.0
Sq. Ft.: 2,290
Stories: 1.0
Lot Size: 0.29 acres
Style: Single Family Residential
Year Built: 1957
Year Renovated: 1980
County: San Mateo County
APN: 038211090

Home facts updated by county records on Sep 2, 2026

Other

Miscellaneous Information
Incorporated: Yes

Around this home

Schools

Baywood Elementary School

Public K-5 • Assigned • 0.5mi

7/10

Borel Middle School

Public 6-8 • Assigned • 1.0mi

8/10

Aragon High School

Public 9-12 • Assigned • 0.6mi

10/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Local insights from Redfin agents

San Mateo stayed one of the Peninsula's busiest markets. Homes averaged 110% of asking price, and buyers continue to compete for updated homes in neighborhoods like Aragon, Baywood and Beresford Park.
2 months ago • San Mateo
Sasai Zhang
Redfin Premier agent
184 deals
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Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

1/10 Fire Factor

Unlikely to be in a wildfire in next 30 years

2/10 Heat Factor

4 days above 86° expected this year, 8 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

7/10 Air Factor

12 unhealthy days expected this year, 12 days in 30 years

Provided by First Street

Historical weather

San Mateo, CA • 94402

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 10.5 hours in June and 5 hours in December, placing it above the U.S. average for solar exposure.

10.5 hrs

5 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$4.01M – $4.85M

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Nearby similar homes

OPEN SAT, 2PM TO 4PM3D WALKTHROUGH

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1227 Rhus St, San Mateo, CA 94402

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3D WALKTHROUGH

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New listings for sale in 94402

OPEN SAT, 2PM TO 4PM

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OPEN SAT, 1:30PM TO 4PM

$1,885,000

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1800 Randall Rd, San Mateo, CA 94402

EARLY ACCESS

$8,000,000

5 beds5 baths4,275 sq ft

709 Hurlingham Ave, San Mateo, CA 94402

$4,999,000

4 beds3.5 baths3,380 sq ft

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OPEN SAT, 1PM TO 4PM

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HOT HOME

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VIDEO TOUR

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Home values near 21 OAK VALLEY Rd

Data from public records.

Address	Redfin Estimate
39 Oak Valley Rd, San Mateo, CA 3 Beds \| 2.5 Baths \| 2380 Sq. Ft.	$2,911,153
24 Oak Valley Rd, San Mateo, CA 4 Beds \| 2.5 Baths \| 2130 Sq. Ft.	$2,818,328

Address	Redfin Estimate
16 Oak Valley Rd, San Mateo, CA 4 Beds \| 2.5 Baths \| 2120 Sq. Ft.	$2,929,038
54 Oak Valley Rd, San Mateo, CA 3 Beds \| 2 Baths \| 2110 Sq. Ft.	$3,057,893

Address	Redfin Estimate
27 Oak Valley Rd, San Mateo, CA 3 Beds \| 2 Baths \| 1810 Sq. Ft.	$2,605,257
45 Oak Valley Rd, San Mateo, CA 4 Beds \| 2.5 Baths \| - Sq. Ft.	$2,942,534

Property information provided by MLSListings when last listed in 2007. This data may not match . Learn more.

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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 94402, CA

Sale history for 21 OAK VALLEY Rd

Tax history for 21 OAK VALLEY Rd

Public record

Property details

Around this home

Schools

Lifestyle

Local insights from Redfin agents

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 94402

Home values near 21 OAK VALLEY Rd

More real estate resources