OFF MARKET
Off Market Jul 2018 for $3.6M
$4,890,896
Est. refi paymentEst. refi $16,922/mo
6
bd
6 ba
4,578
sq ft

3905 Happy Valley Rd, Lafayette, CA 94549

map-entry

About this home

Single-familyProperty Type
1952Year Built
1.34 acresLot Size
$1,068Est. Price/Sq.Ft.
2 spacesParking
Listed by Anthony Cassel DRE #01475854 Golden Gate Sotheby's Int'l Re
Listed by Taylor Harriman DRE #01979921 Golden Gate Sotheby's Int'l Re
Bought with Amanda Thompson DRE #01911093 Alain Pinel REALTORS
Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #40728181

Redfin Estimate

$4,890,896
$1.2M since sold in July 2018$43K since July

This home's estimate is 1.7% lower than the average sale price ($4.98M) of 6 comparable homes.

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Earn from this home

Sell
$2,196,124
Est. take-home

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Refinance
$0
Est. cash available

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Rent
$10,158/mo
Redfin rental estimate

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Market trends in 94549, CA

Sale history for 3905 Happy Valley Rd

Tax history for 3905 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

Nov 18, 2025Final
Building - residential mechanical

Install a ductless mini-split system. No electrical work is included. A HERS report may be required at the final inspection.

HVAC

Nov 2, 2023Final
Building - residential mechanical

Replace a ducted mini-split system with a 14 SEER unit. A HERS report may be 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

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 • 2.1mi

8/10
Acalanes High School

Public 9-12 • Assigned • 2.6mi

10/10
Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Climate risks

10/10 Flood Factor

Estimated 80%+ chance 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

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
$4.65M – $5.63M

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GreatSchools Ratings provided by GreatSchools.org.