OFF MARKET
Google street view image for 21821 Redwood Rd, Castro Valley, CA 94546
Off market jan 1990 for $235K
$798,758
Est. refi paymentEst. refi $1,373/mo
3
bd
•
1 ba
•
1,192
sq ft

21821 Redwood Rd, Castro Valley, CA 94546

map-entry

About this home

21821 Redwood Rd is a 1,192 square foot house on a 5,100 square foot lot with 3 bedrooms and 1 bathroom. - it last sold on January 03, 1990 for $235,000. Based on Redfin's Castro Valley data, we estimate the home's value is $798,758.
Single-familyProperty Type
1948Year Built
5,100 sq ftLot Size
$670Est. Price/Sq.Ft.
Source:Public Records

Redfin Estimate

$798,758
$564K since sold in January 1990$9,000 since September

This home's estimate is 2.3% lower than the average sale price ($817K) of 6 comparable homes.

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Earn from this home

Sell
$756,382
Est. take-home

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Refinance
$0
Est. cash available

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Rent
$3,228/mo
Redfin rental estimate

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Market trends in 94546, CA

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price
103.4%

0.6% MoM

Median sale price
$1.1M

$823 MoM

Avg. days on market
18d

3 days MoM

Recently sold homes
75

7 MoM

New listings for sale

Provided by Redfin

Sale history for 21821 Redwood Rd

Tax history for 21821 Redwood Rd

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

Zoning

CO

Administrative Office Districts

Administrative office districts, hereinafter designated as C-O districts, are established to provide for the location of offices for professional services and for business activities which are characterized by a low volume of direct consumer contact; and to encourage such development in a manner compatible with the uses in adjacent districts, with suitable open spaces, landscaping, and parking area. In Castro Valley (areas within the Castro Valley Urbanized Area), this also includes retail, service, and small scale production uses. C-O districts are typically situated in areas having convenient access from, but not directly on, main thoroughfares, and generally adjacent to a multiple residential development.
Permitted uses

Include but are not limited to:

  • Bank
  • Day care facility
  • Office
  • Medical office
  • Research & development

Property details

Around this home

Schools

Fairview Elementary School

Public K-6 • Assigned • 1.3mi

2/10
Bret Harte Middle School

Public 7-8 • Assigned • 1.4mi

4/10
Hayward High School

Public 9-12 • Assigned • 1.3mi

5/10
Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Local insights from Redfin agents

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

4/10 Heat Factor

7 days above 88° 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

Castro Valley, CA • 94546
Average low and high temperatures (°F)
63
43
64
46
71
49
69
49
73
53
74
54
75
57
79
57
79
60
77
54
65
48
61
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Sun exposure

In this area, properties receive around 11.2 hours in June and 4.9 hours in December, placing it above the U.S. average for solar exposure.

11.2 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$759,000 – $919,000

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Home values near 21821 Redwood Rd

Data from public records.

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