3794 Happy Valley Rd is a 834 square foot house on a 1.04 acre lot with 1 bedroom and 2 bathrooms. - it last sold on June 01, 1978 for $198,000. Based on Redfin's Lafayette data, we estimate the home's value is $2,169,540.
Single-familyProperty Type
1965Year Built
1.04 acresLot Size
$2,601Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$2,169,540
$2.0M since sold in June 1978$65K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 8.4% 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
Jan 30, 2010 • Final
Building/residential/ad/single family addition
Construct a carriage house over a garage. No kitchen is included in the scope of work.
Addition
Jan 30, 2010 • Final
Building/commercial/d/demolition
Demolish a single-family home.
Demolition
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: 4
Exterior
Property Information
Subdivision Name: ACALANES RANCHO
Living Sq. Ft: 834
Ground Floor Sq. Ft: 228
Building Sq. Ft: 834
# of Stories: 2
Legal Description: POR RO ACALANES
Parking & Garage Information
Garage/Parking Sq. Ft: 805
Lot Information
# of Buildings: 1
Land Sq. Ft: 45,302
Acres: 1.04
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 1
Baths: 2.0
Sq. Ft.: 834
Stories: 2.0
Lot Size: 1.04 acres
Style: Single Family Residential
Year Built: 1965
Year Renovated: 1998
County: Contra Costa County
APN: 2450200171
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Happy Valley Elementary School
Public K-5 • Assigned • 0.3mi
8/10
M. H. Stanley Middle School
Public 6-8 • Assigned • 1.7mi
8/10
Acalanes High School
Public 9-12 • Assigned • 2.2mi
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 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)
60
43
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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
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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
$2.06M – $2.50M
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