20 Castle Crest Rd is a 3,466 square foot house on a 0.6 acre lot with 4 bedrooms and 5 bathrooms. - it last sold on February 08, 2017 for $815,000. Based on Redfin's Alamo data, we estimate the home's value is $2,691,925.
Single-familyProperty Type
1949Year Built
0.6 acresLot Size
$777Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$2,691,925
$1.9M since sold in February 2017$124K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 9.3% higher than the average sale price ($2.46M) of 6 comparable homes.
Construct a new detached shade pavilion supported on existing retaining walls.
ADU
Sep 3, 2021 • Final
Building/residential/p/pool
Install a new gunite swimming pool and spa.
Pool and hot tub
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
Room Information
# of Rooms: 11
Exterior
Pool Information
Has Pool
Property Information
Subdivision Name: WALNUT CRK PARK
Living Sq. Ft: 3,466
Ground Floor Sq. Ft: 3,466
Building Sq. Ft: 3,466
# of Stories: 1
Legal Description: WALNUT CREEK PARK POR LOT 13
Parking & Garage Information
Garage/Parking Sq. Ft: 390
Lot Information
# of Buildings: 1
Land Sq. Ft: 26,136
Legal Lot Number: 13
Acres: 0.6
Zoning Code: R-20
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 5.0
Sq. Ft.: 3,466
Stories: 1.0
Lot Size: 0.6 acres
Style: Single Family Residential
Year Built: 1949
Year Renovated: 2010
County: Contra Costa County
APN: 1882000084
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Murwood Elementary School
Public K-5 • Assigned • 0.7mi
9/10
Walnut Creek Intermediate School
Public 6-8 • Assigned • 2.5mi
9/10
Las Lomas High School
Public 9-12 • Assigned • 1.2mi
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
0.93% chance of being in a wildfire in next 30 years
3/10 Heat Factor
8 days above 96° expected this year, 16 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
8/10 Air Factor
15 unhealthy days expected this year, 16 days in 30 years
Provided by First Street
Historical weather
Alamo, CA • 94507
Average low and high temperatures (°F)
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68
46
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47
74
51
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80
55
86
58
83
57
76
53
62
44
56
43
Jan
Feb
Mar
Apr
May
Jun
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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
$2.56M – $3.10M
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