3649 Happy Valley Rd is a 4,264 square foot house on a 1 acre lot with 5 bedrooms and 6 bathrooms. - it last sold on June 11, 1976 for $107,500. Based on Redfin's Lafayette data, we estimate the home's value is $3,393,041.
Single-familyProperty Type
1941Year Built
1 acresLot Size
$796Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$3,393,041
$3.3M since sold in June 1976$58K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 28.3% lower than the average sale price ($4.73M) 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
Aug 28, 2024 • Final
Building - residential re-roof
Remove the existing roof and install new composition shingles.
Roofing
Oct 13, 2021 • Final
Building - residential mechanical
Replace two furnaces and air conditioning systems like-for-like. A HERS report is required at the final inspection.
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
Pool Information
Has Pool
Property Information
Subdivision Name: ACALANES RHO
Living Sq. Ft: 4,264
Ground Floor Sq. Ft: 1,879
Building Sq. Ft: 4,730
# of Stories: 2
Legal Description: POR RO ACALANES
Parking & Garage Information
# of Parking Spaces: 2
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 466
Garage / Carport Type: Attached
Lot Information
# of Buildings: 1
Land Sq. Ft: 43,560
Acres: 1
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 5
Baths: 6.0
Sq. Ft.: 4,264
Stories: 2.0
Lot Size: 1 acres
Style: Single Family Residential
Year Built: 1941
Year Renovated: 1975
County: Contra Costa County
APN: 2441300122
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Happy Valley Elementary School
Public K-5 • Assigned • 1.0mi
8/10
M. H. Stanley Middle School
Public 6-8 • Assigned • 1.0mi
8/10
Acalanes High School
Public 9-12 • Assigned • 1.8mi
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
3/10 Fire Factor
0.77% chance of being in a wildfire in next 30 years
3/10 Heat Factor
7 days above 93° 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
Lafayette, CA • 94549
Average low and high temperatures (°F)
60
43
62
46
70
50
68
49
75
52
78
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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
$3.22M – $3.90M
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