3717 Happy Valley Rd is a 4,576 square foot house on a 0.94 acre lot with 5 bedrooms and 4 bathrooms. - it last sold on June 28, 1996 for $815,000. Based on Redfin's Lafayette data, we estimate the home's value is $3,036,241.
Single-familyProperty Type
1982Year Built
0.94 acresLot Size
$664Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$3,036,241
$2.2M since sold in June 1996$43K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 15.8% lower than the average sale price ($3.60M) 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
Jan 13, 2020 • Final
Building - residential plumbing
Remove and replace a gas water heater.
Gas
Plumbing
Water heater
Sep 1, 2017 • Final
Building - residential mechanical
Replace two air conditioning units and an evaporator coil.
HVAC
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: 13
Exterior
Property Information
Subdivision Name: SUBDIVISION 3660
Living Sq. Ft: 4,576
Ground Floor Sq. Ft: 3,287
Building Sq. Ft: 4,576
# of Stories: 2
Legal Description: TRACT 3660 LOT 12
Parking & Garage Information
Garage/Parking Sq. Ft: 702
Lot Information
# of Buildings: 1
Land Sq. Ft: 40,800
Legal Lot Number: 12
Acres: 0.9366
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 5
Baths: 4.0
Sq. Ft.: 4,576
Stories: 2.0
Lot Size: 0.94 acres
Style: Single Family Residential
Year Built: 1982
Year Renovated: 1984
County: Contra Costa County
APN: 2442420101
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Happy Valley Elementary School
Public K-5 • Assigned • 0.6mi
8/10
M. H. Stanley Middle School
Public 6-8 • Assigned • 1.4mi
8/10
Acalanes High School
Public 9-12 • Assigned • 2.0mi
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
1% chance of being in a wildfire in next 30 years
3/10 Heat Factor
7 days above 95° 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, 16 days in 30 years
Provided by First Street
Historical weather
Lafayette, CA • 94549
Average low and high temperatures (°F)
60
43
62
46
70
50
68
49
75
52
78
54
79
55
87
58
84
59
77
56
63
48
57
45
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
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
$2.89M – $3.49M
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