3825 Happy Valley Rd is a 4,804 square foot house on a 1.12 acre lot with 4 bedrooms and 4 bathrooms. - it last sold on August 08, 1995 for $1,000,000. Based on Redfin's Lafayette data, we estimate the home's value is $4,099,048.
Single-familyProperty Type
1949Year Built
1.12 acresLot Size
$853Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$4,099,048
$3.1M since sold in August 1995$29K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 16.4% higher than the average sale price ($3.52M) 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
May 25, 2021 • Final
Building - residential re-roof
Install a new Tesla solar roof system including solar tiles and roofing squares.
Electrical
Roofing
Solar
May 25, 2021 • Final
Building - residential solar photovoltaic
Install a solar roof system with solar tiles and energy storage systems. Work includes installing a new internal electrical load center and replacing the inverter.
Electrical
Roofing
Solar
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
Heating & Cooling
Heating Type: Radiant
Fireplace Information
# of Fireplaces: 2
Has Fireplace
Room Information
# of Rooms: 13
Exterior
Exterior Information
Physical Condition: Good
Building Construction Quality: Good
Exterior Wall: Wood Siding
Pool Information
Has Pool
Property Information
Subdivision Name: ACALANES RHO
Living Sq. Ft: 4,804
Ground Floor Sq. Ft: 4,454
Building Sq. Ft: 4,804
# of Stories: 2
Legal Description: POR RO ACALANES
Parking & Garage Information
Parking Type: Detached Garage
Garage/Parking Sq. Ft: 912
Garage / Carport Type: Detached
Lot Information
# of Buildings: 1
Land Sq. Ft: 48,787
Acres: 1.12
County Use Description: SINGLE FAMILY
Utility Information
Sewer Type: Public
Water Service Type: Public
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 4.0
Sq. Ft.: 4,804
Stories: 2.0
Lot Size: 1.12 acres
Style: Single Family Residential
Year Built: 1949
Year Renovated: 1963
County: Contra Costa County
APN: 2440100036
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Happy Valley Elementary School
Public K-5 • Assigned • 0.1mi
8/10
M. H. Stanley Middle School
Public 6-8 • Assigned • 1.8mi
8/10
Acalanes High School
Public 9-12 • Assigned • 2.4mi
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, 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)
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43
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70
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49
75
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79
55
87
58
84
59
77
56
63
48
57
45
Jan
Feb
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May
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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
$3.90M – $4.71M
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