Google satellite image for 21 Castanea Ridge Rd, La Honda, CA 94020

OFF MARKET

$2,133,600

•

2 ba

•

2,570

sq ft

21 Castanea Ridge Rd, La Honda, CA 94020

About this home

21 Castanea Ridge Rd is a 2,570 square foot house on a 5.9 acre lot with 4 bedrooms and 2 bathrooms. Based on Redfin's La Honda data, we estimate the home's value is $2,133,600.

Single-familyProperty Type

1973Year Built

5.9 acresLot Size

$830Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$2,133,600

$97K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 50.8% lower than the average sale price ($4.33M) of 5 comparable homes.

SOLD MAY 5, 2026
$3,500,000
A
5 beds4 baths2,878 sq ft
26969 Moody Rd, Los Altos Hills, CA 94022
SOLD MAR 26, 2026
$4,114,500
B
4 beds2.5 baths2,567 sq ft
24793 Northcrest Ln, Los Altos Hills, CA 94024
SOLD NOV 13, 2025
$3,300,000
C
4 beds2 baths2,250 sq ft
26385 Altamont Rd, Los Altos Hills, CA 94022
SOLD AUG 13, 2026
$4,350,000
D
3 beds2.5 baths2,649 sq ft
27690 Central Dr, Los Altos Hills, CA 94022
SOLD MAR 11, 2026
$6,400,000
E
4 beds3.5 baths3,070 sq ft
11913 Murietta Ln, Los Altos Hills, CA 94022

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Earn from this home

Sell

$2,020,586

Est. take-home

List your home with Redfin and save $10,668

Rent

$3,404/mo

Redfin rental estimate

List your home for rent

Market trends in 94020, CA

Last updated August 2026

Sale-to-List Price

97.6%

+2.2% MoM

Median sale price

$1.1M

$238 MoM

Avg. days on market

19d

0 days MoM

Recently sold homes

0 MoM

New listings for sale

OPEN SUN, 1PM TO 3PM
$975,000
5 beds2 baths1,200 sq ft
5 Pope Rd, La Honda, CA 94020
See all

Provided by Redfin

Sale history for 21 Castanea Ridge Rd

As the MLS and public records start to fill up, we'll list the details here.

Year

Property tax

Land + Additions

Assessment*

2025

$2,254 (+1.4%)

$46,925 + $150,408

$197,333

2024

$2,223 (+6.7%)

$46,005 + $147,459

$193,464

2023

$2,083 (+1.6%)

$45,103 + $144,568

$189,671

2022

$2,051 (+1.7%)

$44,219 + $141,734

$185,953

2021

$2,017 (+1.3%)

$43,352 + $138,955

$182,307

2020

$1,992 (+2.8%)

$42,502 + $136,231

$178,733

2019

$1,938 (+2.6%)

$42,067 + $134,835

$176,902

2018

$1,888 (+2.4%)

$41,243 + $132,192

$173,435

2017

$1,843 (+0.8%)

$39,643 + $127,059

$166,702

2016

$1,829 (+3.0%)

$39,643 + $127,059

$166,702

2015

$1,775 (+1.8%)

$38,866 + $124,568

$163,434

2014

$1,743 (+0.1%)

$37,534 + $120,294

$157,828

2012

$1,741 (+1.8%)

$37,365 + $119,751

$157,116

2011

$1,710 (+1.3%)

$36,633 + $117,403

$154,036

2010

$1,689 (+1.8%)

$35,915 + $115,101

$151,016

2009

$1,659 (+2.2%)

$35,647 + $114,241

$149,888

2008

$1,624

$35,732 + $114,513

$150,245

Tax history for 21 Castanea Ridge Rd

Year

Property tax

Land + Additions

Assessment*

2025

$2,254 (+1.4%)

$46,925 + $150,408

$197,333

2024

$2,223 (+6.7%)

$46,005 + $147,459

$193,464

2023

$2,083 (+1.6%)

$45,103 + $144,568

$189,671

2022

$2,051 (+1.7%)

$44,219 + $141,734

$185,953

2021

$2,017 (+1.3%)

$43,352 + $138,955

$182,307

2020

$1,992 (+2.8%)

$42,502 + $136,231

$178,733

2019

$1,938 (+2.6%)

$42,067 + $134,835

$176,902

2018

$1,888 (+2.4%)

$41,243 + $132,192

$173,435

2017

$1,843 (+0.8%)

$39,643 + $127,059

$166,702

2016

$1,829 (+3.0%)

$39,643 + $127,059

$166,702

2015

$1,775 (+1.8%)

$38,866 + $124,568

$163,434

2014

$1,743 (+0.1%)

$37,534 + $120,294

$157,828

2012

$1,741 (+1.8%)

$37,365 + $119,751

$157,116

2011

$1,710 (+1.3%)

$36,633 + $117,403

$154,036

2010

$1,689 (+1.8%)

$35,915 + $115,101

$151,016

2009

$1,659 (+2.2%)

$35,647 + $114,241

$149,888

2008

$1,624

$35,732 + $114,513

$150,245

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

Zoning and permits

Zoning
Permits

Resource Management District

The purposes of this chapter are to carry out the objectives and policies of those San Mateo County General Plan Chapters that fulfill the requirements for State-mandated Open Space and Conservation Elements, as well as other elements adopted as part of the General Plan of San Mateo County, to meet the requirements of Section 65910 of the Government Code of the State of California requiring formulation of an open space zoning ordinance, and to ensure consistency between the General Plan and the zoning ordinance.

Permitted uses

Include but are not limited to:

Religious facility
Restaurant
Hotel / motel
Research & development
Educational/school
Fire house
Golf related
Veterinary clinic
Park & open space

Feb 8, 2023 • Final

Energy storage systems

Install an energy storage system including multiple powerwalls and a load center. Relocate powerwalls to the exterior of the building. A final fire inspection is required prior to the building final inspection.

Battery

Electrical

Aug 9, 2022 • Active

Building permit revision

Relocate energy storage systems to the exterior of the building and install a new load center.

Battery

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

Bathroom Information
# of Full Baths: 2

Room Information
# of Rooms: 7

Exterior

Exterior Information
Construction Type: Wood/Steel
Building Construction Quality: Good

View Information
View: Good

Property Information
Living Sq. Ft: 2,570
Ground Floor Sq. Ft: 2,570
# of Stories: 1
Legal Description: PARCEL B 5.928 AC MOL PARCEL MAP VOL 23/2

Parking & Garage Information
# of Parking Spaces: 2
Garage/Parking Sq. Ft: 640

Lot Information
# of Buildings: 1
Land Sq. Ft: 257,153
Acres: 5.9034
County Use Description: SFR, 5-40 ACRES

Financial

Assessor Information
Assessment Year: 2026

Public facts

Beds: 4
Baths: 2.0
Sq. Ft.: 2,570
Stories: 1.0
Lot Size: 5.9 acres
Style: Single Family Residential
Year Built: 1973
Year Renovated: 1973
County: San Mateo County
APN: 080410120

Home facts updated by county records on Sep 2, 2026

Around this home

Schools

La Honda Elementary School

Public K-5 • Assigned • 6.5mi

9/10

Pescadero Elementary And Middle School

Public K-8 • Assigned • 12.0mi

8/10

Pescadero High School

Public 9-12 • Assigned • 11.4mi

6/10

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

0.46% chance of being in a wildfire in next 30 years

1/10 Heat Factor

7 days above 88° expected this year, 13 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

8/10 Air Factor

13 unhealthy days expected this year, 13 days in 30 years

Provided by First Street

Historical weather

La Honda, CA • 94020

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 10.8 hours in June and 4.9 hours in December, placing it above the U.S. average for solar exposure.

10.8 hrs

4.9 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$2.03M – $2.45M

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New listings for sale in 94020

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$975,000

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Home values near 21 Castanea Ridge Rd

Data from public records.

Address	Redfin Estimate
10 Castanea Ridge Road, La Honda, CA 3 Beds \| 2.5 Baths \| 2240 Sq. Ft.	$1,749,133
40 Castanea Ridge Road, La Honda, CA 3 Beds \| 2.5 Baths \| 3000 Sq. Ft.	$3,703,747

Address	Redfin Estimate
42 Castanea Ridge Road, La Honda, CA 3 Beds \| 1.5 Baths \| 1990 Sq. Ft.	$1,497,749
71 Castanea Ridge Road, La Honda, CA 2 Beds \| 3 Baths \| 3520 Sq. Ft.	$3,977,539

Address	Redfin Estimate
33 Castanea Ridge Road, La Honda, CA 2 Beds \| 2.5 Baths \| 2820 Sq. Ft.	$3,201,139
51 Castanea Ridge Road, La Honda, CA 3 Beds \| 2 Baths \| 2800 Sq. Ft.	$3,412,761

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