3661 Happy Valley Rd is a 2,840 square foot house on a 1.31 acre lot with 3 bedrooms and 2 bathrooms. - it last sold on May 21, 1971 for $56,000. Based on Redfin's Lafayette data, we estimate the home's value is $2,369,462.
Single-familyProperty Type
1950Year Built
1.31 acresLot Size
$834Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$2,369,462
$2.3M since sold in May 1971$7,000 since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 0.5% lower than the average sale price ($2.38M) 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
Jun 7, 2023 • Final
Building - residential re-roof
Remove and replace the roofing on a pitched section with new composition shingles. Replace the modified bitumen on the low slope section with a single-ply membrane.
Roofing
Nov 24, 2020 • Final
Building/grading/gn/grading unsupervised
Demolish a swimming pool.
Demolition
Pool and hot tub
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
Subdivision Name: ACALANES RHO
Living Sq. Ft: 2,840
Ground Floor Sq. Ft: 2,840
Building Sq. Ft: 2,840
# of Stories: 1
Legal Description: POR RO ACALANES
Parking & Garage Information
Garage/Parking Sq. Ft: 483
Lot Information
# of Buildings: 1
Land Sq. Ft: 57,064
Acres: 1.31
Depth Footage: 300
Front Footage: 168
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 2,840
Stories: 1.0
Lot Size: 1.31 acres
Style: Single Family Residential
Year Built: 1950
Year Renovated: 1960
County: Contra Costa County
APN: 2441400120
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
62
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
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
$2.25M – $2.73M
Reach more buyers when you sell with Redfin. Save up to $23,695 in fees.3 minutes to get started.