3873 Happy Valley Rd is a 2,134 square foot house on a 1 acre lot with 5 bedrooms and 4 bathrooms. Based on Redfin's Lafayette data, we estimate the home's value is $2,457,754.
Single-familyProperty Type
1956Year Built
1 acresLot Size
$1,152Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$2,457,754
$72K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 3.5% lower than the average sale price ($2.55M) 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
$4,267 (+1.5%)
$120,865 + $154,241
$275,106
2024
$4,205 (+1.8%)
$118,496 + $151,217
$269,713
2023
$4,129 (+1.7%)
$116,173 + $148,252
$264,425
2022
$4,059 (+2.7%)
$113,896 + $145,346
$259,242
2021
$3,952
$111,663 + $142,497
$254,160
2020
$3,949 (+9.0%)
$109,474 + $139,703
$249,177
2019
$3,624 (+3.2%)
$108,352 + $138,271
$246,623
2018
$3,512 (+0.9%)
$106,228 + $135,560
$241,788
2017
$3,480 (+2.2%)
$102,104 + $130,297
$232,401
2016
$3,403 (+2.4%)
$102,104 + $130,297
$232,401
2015
$3,323 (+0.9%)
$100,102 + $127,743
$227,845
2014
$3,293 (+1.0%)
$96,668 + $123,361
$220,029
2013
$3,260 (+2.5%)
$96,668 + $123,361
$220,029
2012
$3,179 (+1.3%)
$96,232 + $122,804
$219,036
2011
$3,137 (+6.8%)
$94,346 + $120,397
$214,743
2010
$2,937 (+3.9%)
$92,497 + $118,037
$210,534
2009
$2,827 (+1.8%)
$91,806 + $117,155
$208,961
2008
$2,777
$92,025 + $117,434
$209,459
Tax history for 3873 Happy Valley Rd
Year
Property tax
Land + Additions
Assessment*
2025
$4,267 (+1.5%)
$120,865 + $154,241
$275,106
2024
$4,205 (+1.8%)
$118,496 + $151,217
$269,713
2023
$4,129 (+1.7%)
$116,173 + $148,252
$264,425
2022
$4,059 (+2.7%)
$113,896 + $145,346
$259,242
2021
$3,952
$111,663 + $142,497
$254,160
2020
$3,949 (+9.0%)
$109,474 + $139,703
$249,177
2019
$3,624 (+3.2%)
$108,352 + $138,271
$246,623
2018
$3,512 (+0.9%)
$106,228 + $135,560
$241,788
2017
$3,480 (+2.2%)
$102,104 + $130,297
$232,401
2016
$3,403 (+2.4%)
$102,104 + $130,297
$232,401
2015
$3,323 (+0.9%)
$100,102 + $127,743
$227,845
2014
$3,293 (+1.0%)
$96,668 + $123,361
$220,029
2013
$3,260 (+2.5%)
$96,668 + $123,361
$220,029
2012
$3,179 (+1.3%)
$96,232 + $122,804
$219,036
2011
$3,137 (+6.8%)
$94,346 + $120,397
$214,743
2010
$2,937 (+3.9%)
$92,497 + $118,037
$210,534
2009
$2,827 (+1.8%)
$91,806 + $117,155
$208,961
2008
$2,777
$92,025 + $117,434
$209,459
*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/p/pool
Work on a private pool.
Pool and hot tub
Jan 30, 2010 • Final
Building/residential/rp/repair
Remodel
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: 8
Exterior
Property Information
Living Sq. Ft: 2,134
Ground Floor Sq. Ft: 2,134
Building Sq. Ft: 2,765
# of Stories: 1
Legal Description: RECORD OF SURVEY 33 LSM 9 PCL C
Parking & Garage Information
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 631
Garage / Carport Type: Attached
Lot Information
# of Buildings: 1
Land Sq. Ft: 43,355
Acres: 0.9953
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 5
Baths: 4.0
Sq. Ft.: 2,134
Stories: 1.0
Lot Size: 1 acres
Style: Single Family Residential
Year Built: 1956
Year Renovated: 1959
County: Contra Costa County
APN: 2461100113
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 • 2.0mi
8/10
Acalanes High School
Public 9-12 • Assigned • 2.5mi
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
2% chance of being in a wildfire in next 30 years
3/10 Heat Factor
7 days above 92° 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
$2.34M – $2.83M
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