640 Happy Valley Rd is a 5,050 square foot house on a 4.23 acre lot with 6 bedrooms and 6 bathrooms. - it last sold on April 30, 1996 for $415,000. Based on Redfin's Pleasanton data, we estimate the home's value is $3,350,686.
Single-familyProperty Type
1914Year Built
4.23 acresLot Size
$664Est. Price/Sq.Ft.
8 spacesParking
Source:Public Records
Redfin Estimate
$3,350,686
$2.9M since sold in April 1996$152K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 21.1% higher than the average sale price ($2.77M) 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.
Zoning and permits
Zoning
Permits
R1
Single-Family Residence Districts
Single-family residence districts, hereinafter designated as R-1 districts, are established to provide for and protect established neighborhoods of one-family dwellings, and to provide space in suitable locations for additional development of this kind, together with appropriate community facilities and allowance for restricted interim cultivation of the soil compatible with such low-density residential development.
Permitted uses
Include but are not limited to:
Housing-Single unit
Agriculture-Cropland
Agriculture-Grove / orchard
May 5, 2026 • Final
Building
Demolition
Dec 30, 2009 • Final
Building
ADU
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: 12
Exterior
Exterior Information
Physical Condition: Excellent
Building Style Type: L-Shape
Construction Type: Wood
Building Construction Quality: Good
View Information
View: Average
Property Information
Subdivision Name: DEL VALLEY DE SAN JUAN RHO
Living Sq. Ft: 4,812
Building Sq. Ft: 4,812
# of Units: 1
# of Stories: 1
Legal Description: LOT 1
Parking & Garage Information
# of Parking Spaces: 3
Lot Information
# of Buildings: 1
Land Sq. Ft: 184,259
Legal Lot Number: 1
Municipality Name: PLEASANTON UNINCORP
Acres: 4.23
County Use Description: SINGLE FAMILY RESIDENTIAL HOME
Financial
Assessor Information
Assessment Year: 2025
Public facts
Beds: 6
Baths: 6.0
Sq. Ft.: 5,050
Stories: 1.0
Parking Spaces: 8
Basement: Yes
Accessible: No
Lot Size: 4.23 acres
Style: Single Family Residential
Year Built: 1914
Year Renovated: 1985
County: Alameda County
APN: 949 000800400
HOA Dues: —
Garage: Yes
Features: —
Home facts updated by owner on Aug 22, 2024
Around this home
Schools
Phoebe Apperson Hearst Elementary School
Public K-5 • Assigned • 1.2mi
8/10
Pleasanton Middle School
Public 6-8 • Assigned • 1.4mi
7/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
6/10 Flood Factor
Estimated 62-76% chance of a flood reaching the building in the next 30 years
5/10 Fire Factor
4% chance of being in a wildfire in next 30 years
4/10 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, 15 days in 30 years
Provided by First Street
Historical weather
Pleasanton, CA • 94566
Average low and high temperatures (°F)
60
38
63
42
70
46
69
47
76
50
82
53
82
55
87
57
84
57
77
53
64
44
58
43
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 11.4 hours in
June and 4.9 hours in December, placing it above the
U.S. average for solar exposure.
11.4 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$3.18M – $3.85M
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