3669 Happy Valley Rd is a 3,390 square foot house on a 1.8 acre lot with 4 bedrooms and 4 bathrooms. - it last sold on August 16, 1971 for $72,500. Based on Redfin's Lafayette data, we estimate the home's value is $2,984,044.
Single-familyProperty Type
1938Year Built
1.8 acresLot Size
$880Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$2,984,044
$2.9M since sold in August 1971$2,000 since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 1.3% higher than the average sale price ($2.95M) 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 18, 2021 • Final
Building - residential plumbing
Replace a waterline with galvanized pipe from the building to the meter.
Plumbing
Apr 30, 2018 • Final
Building - residential mechanical
Replace the existing furnace.
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: 10
Exterior
Pool Information
Has Pool
Property Information
Living Sq. Ft: 3,390
Ground Floor Sq. Ft: 2,940
Building Sq. Ft: 3,390
# of Stories: 1
Legal Description: PARCEL MAP 17 PG 34 PCL A
Parking & Garage Information
Garage/Parking Sq. Ft: 829
Lot Information
# of Buildings: 1
Land Sq. Ft: 78,408
Acres: 1.8
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 4.0
Sq. Ft.: 3,390
Stories: 1.0
Lot Size: 1.8 acres
Style: Single Family Residential
Year Built: 1938
Year Renovated: 1950
County: Contra Costa County
APN: 2441400138
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Happy Valley Elementary School
Public K-5 • Assigned • 0.9mi
8/10
M. H. Stanley Middle School
Public 6-8 • Assigned • 1.1mi
8/10
Acalanes High School
Public 9-12 • Assigned • 1.9mi
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
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46
70
50
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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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Aug
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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
$2.84M – $3.43M
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