OFF MARKET
Google street view image for 3820 Happy Valley Rd, Lafayette, CA 94549
Off Market Jan 2022 for $12M
$9,670,624
Est. refi paymentEst. refi $77,665/mo
6
bd
•
— ba
•
9,281
sq ft

3820 Happy Valley Rd, Lafayette, CA 94549

map-entry

About this home

3820 Happy Valley Rd is a 9,281 square foot house on a 2.03 acre lot with 6 bedrooms. - it last sold on January 18, 2022 for $12,000,000. Based on Redfin's Lafayette data, we estimate the home's value is $9,670,624.
Single-familyProperty Type
1986Year Built
2.03 acresLot Size
$1,042Est. Price/Sq.Ft.
Source:Public Records

Redfin Estimate

$9,670,624
$2.3M since sold in January 2022$102K since July

This home's estimate is 154.7% higher than the average sale price ($3.80M) of 6 comparable homes.

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Earn from this home

Sell
$411,916
Est. take-home

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Refinance
$0
Est. cash available

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Rent
$10,133/mo
Redfin rental estimate

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Market trends in 94549, CA

Last updated July 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price
101.9%

0.2% MoM

Median sale price
$2.0M

$452 MoM

Avg. days on market
18d

0 days MoM

Recently sold homes
96

15 MoM

New listings for sale

Provided by Redfin

Sale history for 3820 Happy Valley Rd

Tax history for 3820 Happy Valley Rd

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Permits

Mar 7, 2024 • Final
Building/residential/r/adu-2nd unit

Construct a detached accessory dwelling unit consisting of a conversion and a new addition. The project includes ember resistant construction and fire sprinklers for a residential building located in a high fire hazard severity zone. A solar photovoltaic system is not required per the updated energy report.

ADU

Electrical

Solar

Feb 22, 2024 • Final
Building/residential/mir/miscellaneous residential

Construct a new pergola, an outdoor kitchen with a sink, and an outdoor fireplace on an existing pool patio.

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

Around this home

Schools

Happy Valley Elementary School

Public K-5 • Assigned • 0.2mi

8/10
M. H. Stanley Middle School

Public 6-8 • Assigned • 1.8mi

8/10
Acalanes High School

Public 9-12 • Assigned • 2.3mi

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 95° 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
$9.17M – $11.10M

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Home values near 3820 Happy Valley Rd

Data from public records.
This data may not show owner updates. Learn more.

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