Google street view image for 4840 Alpine Rd, Portola Valley, CA 94028

Off market dec 1979 for $275K

$3,521,683

Est. refi paymentEst. refi $1,686/mo

•

2.5 ba

•

2,580

sq ft

4840 Alpine Rd, Portola Valley, CA 94028

About this home

4840 Alpine Rd is a 2,580 square foot house on a 0.84 acre lot with 5 bedrooms and 2.5 bathrooms. - it last sold on December 01, 1979 for $275,000. Based on Redfin's Portola Valley data, we estimate the home's value is $3,521,683.

Single-familyProperty Type

1964Year Built

0.84 acresLot Size

$1,365Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$3,521,683

$3.2M since sold in December 1979$86K since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 2.1% higher than the average sale price ($3.45M) of 5 comparable homes.

SOLD SEP 25, 2026
$3,055,000
A
4 beds3 baths2,040 sq ft
100 Tan Oak Dr, Portola Valley, CA 94028
SOLD JUN 1, 2026
$3,998,000
B
5 beds2.5 baths2,474 sq ft
14278 Amherst Ct, Los Altos Hills, CA 94022
SOLD JUL 21, 2026
$3,100,000
C
4 beds3.5 baths2,992 sq ft
124 Foxwood Rd, Portola Valley, CA 94028
SOLD JUN 29, 2026
$3,600,000
D
3 beds2.5 baths2,625 sq ft
5 Sandstone St, Portola Valley, CA 94028
SOLD JUN 11, 2026
$3,500,000
E
3 beds3 baths2,225 sq ft
332 Canyon Dr, Portola Valley, CA 94028

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Earn from this home

Sell

$3,335,795

Est. take-home

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Refinance

Est. cash available

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Rent

$3,847/mo

Redfin rental estimate

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Market trends in 94028, CA

Last updated September 2026

Buyer's Market

Seller's Market

Balanced market

Sale-to-List Price

98.4%

0.6% MoM

Median sale price

$5.4M

$473K MoM

Avg. days on market

42d

0 days MoM

Recently sold homes

6 MoM

New listings for sale

EARLY ACCESS
$4,295,000
4 beds2 baths2,150 sq ft
980 La Mesa Dr, Portola Valley, CA 94028
EARLY ACCESS
$4,850,000
4 beds4 baths3,511 sq ft
369 Ramona Rd, Portola Valley, CA 94028
OPEN SUN, 1PM TO 4PM
$2,950,000
3 beds2 baths1,790 sq ft
251 Dedalera Dr, Portola Valley, CA 94028
OPEN SUN, 1:30PM TO 4:30PM
$4,995,000
4 beds3 baths3,770 sq ft
12 Hawkview St, Portola Valley, CA 94028
$4,999,999
5 beds3.5 baths5,040 sq ft
10 Joaquin Rd, Portola Valley, CA 94028
See all

Provided by Redfin

Sale history for 4840 Alpine Rd

Year

Property tax

Land + Additions

Assessment*

2025

$8,023 (+1.8%)

$395,928 + $226,485

$622,413

2024

$7,881 (+2.1%)

$388,165 + $222,045

$610,210

2023

$7,718 (+2.7%)

$380,554 + $217,692

$598,246

2022

$7,513 (+1.5%)

$373,093 + $213,424

$586,517

2021

$7,404 (+1.0%)

$365,778 + $209,240

$575,018

2020

$7,334 (+1.6%)

$358,606 + $205,138

$563,744

2019

$7,220 (+5.2%)

$354,929 + $203,035

$557,964

2018

$6,866 (+1.8%)

$347,970 + $199,054

$547,024

2017

$6,743 (+2.3%)

$334,459 + $191,325

$525,784

2016

$6,589 (+1.5%)

$334,459 + $191,325

$525,784

2015

$6,492 (+3.5%)

$327,901 + $187,574

$515,475

2014

$6,275 (+4.2%)

$316,650 + $181,138

$497,788

2012

$6,023 (+2.7%)

$315,219 + $180,320

$495,539

2011

$5,866 (+2.0%)

$309,039 + $176,785

$485,824

2010

$5,752 (+2.1%)

$302,980 + $173,319

$476,299

2009

$5,631 (+4.7%)

$300,716 + $172,024

$472,740

2008

$5,381

$301,431 + $172,433

$473,864

Tax history for 4840 Alpine Rd

Year

Property tax

Land + Additions

Assessment*

2025

$8,023 (+1.8%)

$395,928 + $226,485

$622,413

2024

$7,881 (+2.1%)

$388,165 + $222,045

$610,210

2023

$7,718 (+2.7%)

$380,554 + $217,692

$598,246

2022

$7,513 (+1.5%)

$373,093 + $213,424

$586,517

2021

$7,404 (+1.0%)

$365,778 + $209,240

$575,018

2020

$7,334 (+1.6%)

$358,606 + $205,138

$563,744

2019

$7,220 (+5.2%)

$354,929 + $203,035

$557,964

2018

$6,866 (+1.8%)

$347,970 + $199,054

$547,024

2017

$6,743 (+2.3%)

$334,459 + $191,325

$525,784

2016

$6,589 (+1.5%)

$334,459 + $191,325

$525,784

2015

$6,492 (+3.5%)

$327,901 + $187,574

$515,475

2014

$6,275 (+4.2%)

$316,650 + $181,138

$497,788

2012

$6,023 (+2.7%)

$315,219 + $180,320

$495,539

2011

$5,866 (+2.0%)

$309,039 + $176,785

$485,824

2010

$5,752 (+2.1%)

$302,980 + $173,319

$476,299

2009

$5,631 (+4.7%)

$300,716 + $172,024

$472,740

2008

$5,381

$301,431 + $172,433

$473,864

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

Property details

Interior

Bathroom Information
# of Full Baths: 2
# of 1/2 Baths: 1

Heating & Cooling
Air Conditioning Type: Central
Heating Type: Central

Fireplace Information
# of Fireplaces: 1
Has Fireplace

Room Information
# of Rooms: 10

Exterior

Exterior Information
Building Style Type: Ranch
Construction Type: Wood/Steel
Building Construction Quality: Good
Exterior Wall: Stucco

View Information
View: Good

Property Information
Subdivision Name: JOSE ANTONIO MARTINEZ ESTATE
Living Sq. Ft: 2,580
Ground Floor Sq. Ft: 1,500
Building Sq. Ft: 3,250
# of Stories: 2
Legal Description: PTN LOT 7 MARTINEZ PARTITION RSM 2/83-84

Parking & Garage Information
# of Parking Spaces: 3
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 670
Garage / Carport Type: Attached

Lot Information
# of Buildings: 1
Land Sq. Ft: 36,775
Legal Lot Number: 7
Acres: 0.8442
Zoning Code: R1001A
County Use Description: SINGLE FAMILY

Location Information
Parcel Location Influence: Corner

Financial

Assessor Information
Assessment Year: 2026

Public facts

Beds: 5
Baths: 2.5
Sq. Ft.: 2,580
Stories: 2.0
Lot Size: 0.84 acres
Style: Single Family Residential
Year Built: 1964
Year Renovated: —
County: San Mateo County
APN: 079140310

Home facts updated by county records on Sep 2, 2026

Around this home

Schools

Corte Madera School

Public 4-8 • Assigned • 0.3mi

10/10

Woodside High School

Public 9-12 • Assigned • 5.7mi

8/10

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

3/10 Fire Factor

0.62% chance of being in a wildfire in next 30 years

2/10 Heat Factor

7 days above 94° expected this year, 14 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

Portola Valley, CA • 94028

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

10.7 hrs

5 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$3.35M – $4.05M

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Home values near 4840 Alpine Rd

Data from public records.

Address	Redfin Estimate
4750 Alpine Rd, Portola Valley, CA 3 Beds \| 3 Baths \| 2210 Sq. Ft.	$3,721,894
4850 Alpine Rd, Portola Valley, CA 4 Beds \| 3.5 Baths \| 2900 Sq. Ft.	$3,915,660

Address	Redfin Estimate
4780 Alpine Rd, Portola Valley, CA 4 Beds \| 3.5 Baths \| 2540 Sq. Ft.	$3,837,525
4860 Alpine Rd, Portola Valley, CA 5 Beds \| 3 Baths \| 3590 Sq. Ft.	$6,161,994

Address	Redfin Estimate
4760 Alpine Rd, Portola Valley, CA 4 Beds \| 4 Baths \| 2930 Sq. Ft.	$3,831,684
4880 Alpine Rd, Portola Valley, CA 4 Beds \| 3 Baths \| 3400 Sq. Ft.	$2,994,989

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