3981 Happy Valley Rd is a 4,734 square foot house on a 1.3 acre lot with 5 bedrooms and 5 bathrooms. Based on Redfin's Lafayette data, we estimate the home's value is $4,055,026.
Single-familyProperty Type
1942Year Built
1.3 acresLot Size
$857Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$4,055,026
$163K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 16.7% lower than the average sale price ($4.87M) 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
$9,816 (+1.8%)
$245,098 + $508,914
$754,012
2024
$9,640 (+1.9%)
$240,293 + $498,936
$739,229
2023
$9,456 (+1.6%)
$235,582 + $489,153
$724,735
2022
$9,304 (+3.1%)
$230,963 + $479,562
$710,525
2021
$9,027 (+0.3%)
$226,435 + $470,159
$696,594
2020
$9,004 (+4.3%)
$221,996 + $460,941
$682,937
2019
$8,630 (+3.7%)
$219,720 + $456,215
$675,935
2018
$8,319 (+1.8%)
$215,412 + $447,270
$662,682
2017
$8,172 (+2.2%)
$207,049 + $429,902
$636,951
2016
$7,997 (+2.9%)
$207,049 + $429,902
$636,951
2015
$7,768 (+1.1%)
$202,990 + $421,473
$624,463
2014
$7,680 (+1.4%)
$196,025 + $407,011
$603,036
2013
$7,573 (+3.3%)
$196,025 + $407,011
$603,036
2012
$7,334 (+1.8%)
$195,140 + $405,172
$600,312
2011
$7,208 (+3.6%)
$191,314 + $397,228
$588,542
2010
$6,954 (−2.9%)
$187,563 + $389,440
$577,003
2009
$7,165 (+1.7%)
$186,162 + $386,530
$572,692
2008
$7,044
$186,605 + $387,449
$574,054
Tax history for 3981 Happy Valley Rd
Year
Property tax
Land + Additions
Assessment*
2025
$9,816 (+1.8%)
$245,098 + $508,914
$754,012
2024
$9,640 (+1.9%)
$240,293 + $498,936
$739,229
2023
$9,456 (+1.6%)
$235,582 + $489,153
$724,735
2022
$9,304 (+3.1%)
$230,963 + $479,562
$710,525
2021
$9,027 (+0.3%)
$226,435 + $470,159
$696,594
2020
$9,004 (+4.3%)
$221,996 + $460,941
$682,937
2019
$8,630 (+3.7%)
$219,720 + $456,215
$675,935
2018
$8,319 (+1.8%)
$215,412 + $447,270
$662,682
2017
$8,172 (+2.2%)
$207,049 + $429,902
$636,951
2016
$7,997 (+2.9%)
$207,049 + $429,902
$636,951
2015
$7,768 (+1.1%)
$202,990 + $421,473
$624,463
2014
$7,680 (+1.4%)
$196,025 + $407,011
$603,036
2013
$7,573 (+3.3%)
$196,025 + $407,011
$603,036
2012
$7,334 (+1.8%)
$195,140 + $405,172
$600,312
2011
$7,208 (+3.6%)
$191,314 + $397,228
$588,542
2010
$6,954 (−2.9%)
$187,563 + $389,440
$577,003
2009
$7,165 (+1.7%)
$186,162 + $386,530
$572,692
2008
$7,044
$186,605 + $387,449
$574,054
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Apr 19, 2021 • Final
Building - residential solar photovoltaic
Install roof-mounted solar panels on a residential building.
Electrical
Solar
Mar 5, 2021 • Final
Building - residential solar photovoltaic
Install a roof-mounted photovoltaic system with modules and energy storage systems.
Battery
Electrical
Solar
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
Heating & Cooling
Heating Fuel Type: Gas
Heating Type: Forced Air
Fireplace Information
# of Fireplaces: 3
Has Fireplace
Room Information
# of Rooms: 14
Exterior
Exterior Information
Physical Condition: Good
Foundation Type: Raised W/Crawlspace
Building Style Type: Conventional
Building Construction Quality: Good
Exterior Wall: Wood Siding
Property Information
Living Sq. Ft: 4,734
Ground Floor Sq. Ft: 4,354
Building Sq. Ft: 4,734
# of Stories: 1
Legal Description: PARCEL MAP 45 PG 10 PCL A
Parking & Garage Information
# of Parking Spaces: 2
Parking Type: Garage/Carport
Garage/Parking Sq. Ft: 528
Lot Information
# of Buildings: 1
Land Sq. Ft: 56,628
Acres: 1.3
County Use Description: SINGLE FAMILY
Utility Information
Sewer Type: Public
Water Service Type: Public
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 5
Baths: 5.0
Sq. Ft.: 4,734
Stories: 1.0
Lot Size: 1.3 acres
Style: Single Family Residential
Year Built: 1942
Year Renovated: 1970
County: Contra Costa County
APN: 2461600179
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Happy Valley Elementary School
Public K-5 • Assigned • 0.5mi
8/10
M. H. Stanley Middle School
Public 6-8 • Assigned • 2.4mi
8/10
Acalanes High School
Public 9-12 • Assigned • 2.9mi
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
4/10 Fire Factor
1% 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
14 unhealthy days expected this year, 15 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
$3.85M – $4.66M
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