3686 Happy Valley Rd is a 3,859 square foot house on a 0.7 acre lot with 5 bedrooms and 4 bathrooms. Based on Redfin's Lafayette data, we estimate the home's value is $2,763,629.
Single-familyProperty Type
1968Year Built
0.7 acresLot Size
$716Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$2,763,629
$68K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 8.8% lower than the average sale price ($3.03M) of 6 comparable homes.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2025
$7,827 (+1.9%)
$73,152 + $494,011
$567,163
2024
$7,685 (+2.0%)
$71,718 + $484,325
$556,043
2023
$7,532 (+1.7%)
$70,312 + $474,829
$545,141
2022
$7,409 (+3.1%)
$68,934 + $465,519
$534,453
2021
$7,187 (+0.6%)
$67,583 + $456,392
$523,975
2020
$7,148 (+5.2%)
$66,258 + $447,444
$513,702
2019
$6,793 (+3.7%)
$65,579 + $442,857
$508,436
2018
$6,547 (+1.8%)
$64,294 + $434,174
$498,468
2017
$6,431 (+2.3%)
$61,799 + $417,315
$479,114
2016
$6,284 (+3.0%)
$61,799 + $417,315
$479,114
2015
$6,100 (+1.3%)
$60,588 + $409,133
$469,721
2014
$6,022 (+1.5%)
$58,509 + $395,095
$453,604
2013
$5,931 (+3.3%)
$58,509 + $395,095
$453,604
2012
$5,740 (+1.9%)
$58,245 + $393,310
$451,555
2011
$5,635 (+4.5%)
$57,103 + $385,599
$442,702
2010
$5,391 (−0.3%)
$55,984 + $378,039
$434,023
2009
$5,405 (+1.8%)
$55,566 + $375,214
$430,780
2008
$5,312
$55,699 + $376,106
$431,805
Tax history for 3686 Happy Valley Rd
Year
Property tax
Land + Additions
Assessment*
2025
$7,827 (+1.9%)
$73,152 + $494,011
$567,163
2024
$7,685 (+2.0%)
$71,718 + $484,325
$556,043
2023
$7,532 (+1.7%)
$70,312 + $474,829
$545,141
2022
$7,409 (+3.1%)
$68,934 + $465,519
$534,453
2021
$7,187 (+0.6%)
$67,583 + $456,392
$523,975
2020
$7,148 (+5.2%)
$66,258 + $447,444
$513,702
2019
$6,793 (+3.7%)
$65,579 + $442,857
$508,436
2018
$6,547 (+1.8%)
$64,294 + $434,174
$498,468
2017
$6,431 (+2.3%)
$61,799 + $417,315
$479,114
2016
$6,284 (+3.0%)
$61,799 + $417,315
$479,114
2015
$6,100 (+1.3%)
$60,588 + $409,133
$469,721
2014
$6,022 (+1.5%)
$58,509 + $395,095
$453,604
2013
$5,931 (+3.3%)
$58,509 + $395,095
$453,604
2012
$5,740 (+1.9%)
$58,245 + $393,310
$451,555
2011
$5,635 (+4.5%)
$57,103 + $385,599
$442,702
2010
$5,391 (−0.3%)
$55,984 + $378,039
$434,023
2009
$5,405 (+1.8%)
$55,566 + $375,214
$430,780
2008
$5,312
$55,699 + $376,106
$431,805
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Dec 1, 2023 • Final
Building - residential mechanical
Replace a furnace in a closet and an air conditioning unit in the backyard. Replace the evaporator coil. A HERS report may be required at the final inspection.
HVAC
Jun 15, 2023 • Final
Building - residential mechanical
Replace a 4-ton air conditioning unit in the backyard and a 4-ton coil. A HERS report is required at the final inspection.
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: 13
Exterior
Pool Information
Has Pool
Property Information
Subdivision Name: ACALANES RHO
Living Sq. Ft: 3,859
Ground Floor Sq. Ft: 2,383
Building Sq. Ft: 3,859
# of Stories: 2
Legal Description: POR RO ACALANES
Parking & Garage Information
Garage/Parking Sq. Ft: 525
Lot Information
# of Buildings: 1
Land Sq. Ft: 30,492
Legal Lot Number: 1
Acres: 0.7
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 5
Baths: 4.0
Sq. Ft.: 3,859
Stories: 2.0
Lot Size: 0.7 acres
Style: Single Family Residential
Year Built: 1968
Year Renovated: 1975
County: Contra Costa County
APN: 2441500101
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Happy Valley Elementary School
Public K-5 • Assigned • 0.8mi
8/10
M. H. Stanley Middle School
Public 6-8 • Assigned • 1.2mi
8/10
Acalanes High School
Public 9-12 • Assigned • 1.8mi
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 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
$2.63M – $3.18M
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