4380 Harmon Rd is a 1,022 square foot house on a 39 acre lot with 3 bedrooms and 1 bathroom. - it last sold on October 31, 2014 for $320,000. Based on Redfin's El Sobrante data, we estimate the home's value is $787,053.
Single-familyProperty Type
1951Year Built
39 acresLot Size
$770Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$787,053
$467K since sold in October 2014$86K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 27.7% higher than the average sale price ($616K) of 6 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Oct 10, 2014 • Final
Building - residential plumbing
Gas
Sep 17, 2009 • Final
Building/rrip/single family/na
New construction
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: 6
Exterior
Property Information
Subdivision Name: GREEN ACRES
Living Sq. Ft: 1,022
Ground Floor Sq. Ft: 1,022
Building Sq. Ft: 1,022
# of Stories: 1
Legal Description: GREEN ACRES 39
Parking & Garage Information
Garage/Parking Sq. Ft: 252
Lot Information
# of Buildings: 1
Land Sq. Ft: 1,698,840
Legal Lot Number: 39
Acres: 39
Zoning Code: R-6
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 1.0
Sq. Ft.: 1,022
Stories: 1.0
Lot Size: 39 acres
Style: Single Family Residential
Year Built: 1951
Year Renovated: 1951
County: Contra Costa County
APN: 4350350106
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Sheldon Elementary School
Public K-6 • Assigned • 0.4mi
6/10
Betty Reid Soskin Middle
Public 6-8 • Assigned • 1.5mi
2/10
De Anza Senior High School
Public 9-12 • Assigned • 0.9mi
4/10
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
3/10 Heat Factor
7 days above 88° expected this year, 15 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, 15 days in 30 years
Provided by First Street
Historical weather
El Sobrante, CA • 94803
Average low and high temperatures (°F)
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44
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45
67
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49
69
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66
53
73
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73
56
73
54
61
48
57
45
Jan
Feb
Mar
Apr
May
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Aug
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Dec
Sun exposure
In this area, properties receive around 11.1 hours in
June and 5 hours in December, placing it above the
U.S. average for solar exposure.
11.1 hrs
5 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$748,000 – $906,000
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