4040 Happy Valley Rd is a 2,607 square foot house on a 1.54 acre lot with 3 bedrooms and 3 bathrooms. - it last sold on October 20, 1992 for $454,000. Based on Redfin's Lafayette data, we estimate the home's value is $2,510,668.
Single-familyProperty Type
1946Year Built
1.54 acresLot Size
$963Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$2,510,668
$2.1M since sold in October 1992$53K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 25.4% higher than the average sale price ($2.00M) 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
Nov 3, 2017 • Final
Building - residential mechanical
Install a new two-stage furnace and a two-stage air conditioning unit. The equipment includes a high-efficiency furnace and a high-efficiency air conditioner.
HVAC
Oct 25, 2017 • Final
Building - residential electrical
Install a new 220-volt electrical circuit from the main electrical panel. Utilize conduit as needed and install a fused disconnect.
Electrical
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: 9
Exterior
Property Information
Subdivision Name: ACALANES RHO
Living Sq. Ft: 2,607
Ground Floor Sq. Ft: 1,939
Building Sq. Ft: 2,607
# of Stories: 1
Legal Description: RO ACALANES 1.54 AC
Parking & Garage Information
Garage/Parking Sq. Ft: 375
Lot Information
# of Buildings: 1
Land Sq. Ft: 67,082
Acres: 1.54
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 3.0
Sq. Ft.: 2,607
Stories: 1.0
Lot Size: 1.54 acres
Style: Single Family Residential
Year Built: 1946
Year Renovated: 1966
County: Contra Costa County
APN: 2460200070
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Happy Valley Elementary School
Public K-5 • Assigned • 0.7mi
8/10
M. H. Stanley Middle School
Public 6-8 • Assigned • 2.6mi
8/10
Acalanes High School
Public 9-12 • Assigned • 3.2mi
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
1% chance of being in a wildfire in next 30 years
3/10 Heat Factor
7 days above 92° 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
14 unhealthy days expected this year, 15 days in 30 years
Provided by First Street
Historical weather
Lafayette, CA • 94549
Average low and high temperatures (°F)
60
43
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46
70
50
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75
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79
55
87
58
84
59
77
56
63
48
57
45
Jan
Feb
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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
$2.39M – $2.89M
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