Google street view image for 3975 Happy Valley Rd, Lafayette, CA 94549

Off market jun 2000 for $2.5M

$6,022,776

Est. refi paymentEst. refi $9,948/mo

•

5 ba

•

6,254

sq ft

3975 Happy Valley Rd, Lafayette, CA 94549

About this home

3975 Happy Valley Rd is a 6,254 square foot house on a 1.02 acre lot with 5 bedrooms and 5 bathrooms. - it last sold on June 13, 2000 for $2,500,000. Based on Redfin's Lafayette data, we estimate the home's value is $6,022,776.

Single-familyProperty Type

1938Year Built

1.02 acresLot Size

$963Est. Price/Sq.Ft.

2 car garageParking

Source:Public Records

Redfin Estimate

$6,022,776

$3.5M since sold in June 2000$69K since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 59.3% higher than the average sale price ($3.78M) of 6 comparable homes.

SOLD AUG 26, 2026
$4,800,000
A
4 beds3.5 baths4,033 sq ft
3954 S Peardale Dr, Lafayette, CA 94549
SOLD AUG 21, 2026
$4,250,000
B
4 beds3.5 baths3,399 sq ft
3814 Happy Valley Rd, Lafayette, CA 94549
SOLD SEP 9, 2026
$3,550,000
C
5 beds3.5 baths3,890 sq ft
3907 Happy Valley Rd, Lafayette, CA 94549
SOLD OCT 28, 2026
$1,990,000
D
4 beds3.5 baths4,015 sq ft
65 Bates Blvd, Orinda, CA 94563
SOLD MAY 15, 2026
$3,300,000
E
4 beds4 baths3,530 sq ft
1122 Via Media, Lafayette, CA 94549
SOLD JUL 9, 2026
$4,800,000
F
4 beds3.5 baths4,511 sq ft
1165 Glen Rd, Lafayette, CA 94549

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Earn from this home

Sell

$5,328,580

Est. take-home

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Refinance

Est. cash available

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Rent

$9,687/mo

Redfin rental estimate

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Market trends in 94549, CA

Last updated October 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

102.4%

+1.0% MoM

Median sale price

$1.8M

$948 MoM

Avg. days on market

17d

0 days MoM

Recently sold homes

1 MoM

New listings for sale

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1003 Woodbury Rd #104, Lafayette, CA 94549
$1,092,000
2 beds2 baths1,110 sq ft
1003 Woodbury Rd #104, Lafayette, CA 94549
COMING SOON
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3 beds2 baths1,651 sq ft
490 Florence Dr, Lafayette, CA 94549
OPEN TODAY, 1PM TO 4PM
$1,495,000
3 beds2 baths1,670 sq ft
3241 Judith Ln, Lafayette, CA 94549
3D WALKTHROUGH
$2,895,000
4 beds4.5 baths4,225 sq ft
3370 Stage Coach Dr, Lafayette, CA 94549
OPEN TODAY, 1PM TO 4PM
$2,975,000
4 beds3 baths2,619 sq ft
4022 Happy Valley Rd, Lafayette, CA 94549
3D WALKTHROUGH
$999,000
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OPEN TODAY, 2PM TO 4PM
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See all

Provided by Redfin

Sale history for 3975 Happy Valley Rd

Year

Property tax

Land + Additions

Assessment*

2026

$52,294 (+2.4%)

$783,853 + $3,789,712

$4,573,565

2025

$51,092 (+1.7%)

$783,853 + $3,789,712

$4,573,565

2024

$50,259 (+1.7%)

$768,484 + $3,715,404

$4,483,888

2023

$49,417 (+0.9%)

$753,416 + $3,642,553

$4,395,969

2022

$48,989 (+3.0%)

$738,644 + $3,571,131

$4,309,775

2021

$47,561 (+11.3%)

$724,161 + $3,501,109

$4,225,270

2020

$42,719 (+2.2%)

$709,962 + $3,432,460

$4,142,422

2019

$41,803 (+4.5%)

$670,000 + $2,970,000

$3,640,000

2018

$39,989 (+4.2%)

$670,000 + $2,880,000

$3,550,000

2017

$38,367 (+4.9%)

$603,459 + $2,696,541

$3,300,000

2016

$36,565 (+1.3%)

$603,459 + $2,696,541

$3,300,000

2015

$36,093 (+6.5%)

$573,012 + $2,560,488

$3,133,500

2014

$33,900 (+5.5%)

$530,313 + $2,369,687

$2,900,000

2013

$32,147 (+1.2%)

$530,313 + $2,369,687

$2,900,000

2012

$31,763 (−7.9%)

$505,168 + $2,257,332

$2,762,500

2011

$34,498 (−5.0%)

$505,168 + $2,257,332

$2,762,500

2010

$36,324

$548,599 + $2,451,401

$3,000,000

2009

$36,298 (−0.7%)

$582,157 + $2,601,343

$3,183,500

2008

$36,537

$582,157 + $2,601,343

$3,183,500

Tax history for 3975 Happy Valley Rd

Year

Property tax

Land + Additions

Assessment*

2026

$52,294 (+2.4%)

$783,853 + $3,789,712

$4,573,565

2025

$51,092 (+1.7%)

$783,853 + $3,789,712

$4,573,565

2024

$50,259 (+1.7%)

$768,484 + $3,715,404

$4,483,888

2023

$49,417 (+0.9%)

$753,416 + $3,642,553

$4,395,969

2022

$48,989 (+3.0%)

$738,644 + $3,571,131

$4,309,775

2021

$47,561 (+11.3%)

$724,161 + $3,501,109

$4,225,270

2020

$42,719 (+2.2%)

$709,962 + $3,432,460

$4,142,422

2019

$41,803 (+4.5%)

$670,000 + $2,970,000

$3,640,000

2018

$39,989 (+4.2%)

$670,000 + $2,880,000

$3,550,000

2017

$38,367 (+4.9%)

$603,459 + $2,696,541

$3,300,000

2016

$36,565 (+1.3%)

$603,459 + $2,696,541

$3,300,000

2015

$36,093 (+6.5%)

$573,012 + $2,560,488

$3,133,500

2014

$33,900 (+5.5%)

$530,313 + $2,369,687

$2,900,000

2013

$32,147 (+1.2%)

$530,313 + $2,369,687

$2,900,000

2012

$31,763 (−7.9%)

$505,168 + $2,257,332

$2,762,500

2011

$34,498 (−5.0%)

$505,168 + $2,257,332

$2,762,500

2010

$36,324

$548,599 + $2,451,401

$3,000,000

2009

$36,298 (−0.7%)

$582,157 + $2,601,343

$3,183,500

2008

$36,537

$582,157 + $2,601,343

$3,183,500

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

Permits

Dec 1, 2020 • Final

Building/residential/mir/miscellaneous residential

Install a natural gas standby generator and a transfer switch with associated electrical work.

Generator

Oct 12, 2020 • Final

Building/grading/gl/grading lafayette

Demolish an existing pool and perform grading and drainage work to install new retaining walls.

Demolition

Grading

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
Air Conditioning Type: Central
Heating Fuel Type: Gas
Heating Type: Forced Air

Fireplace Information
# of Fireplaces: 1
Has Fireplace

Room Information
# of Rooms: 14

Exterior

Exterior Information
Physical Condition: Good
Foundation Type: Raised W/Crawlspace
Building Construction Quality: Good
Exterior Wall: Wood

Property Information
Subdivision Name: ACALANES RHO
Living Sq. Ft: 6,254
Ground Floor Sq. Ft: 4,364
Building Sq. Ft: 6,254
# of Stories: 2
Legal Description: RO ACALANES

Parking & Garage Information
# of Parking Spaces: 2
Parking Type: Garage/Carport
Garage/Parking Sq. Ft: 777

Lot Information
# of Buildings: 1
Land Sq. Ft: 44,431
Acres: 1.02
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.: 6,254
Stories: 2.0
Lot Size: 1.02 acres
Style: Single Family Residential
Year Built: 1938
Year Renovated: 1975
County: Contra Costa County
APN: 2461600161

Home facts updated by county records on Oct 30, 2026

Around this home

Schools

K - 12
Preschool & daycare

Happy Valley Elementary School

Public K-5 • Assigned • 0.4mi

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°

81°

56°

87°

58°

81°

60°

72°

54°

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

$5.72M – $6.93M

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Home values near 3975 Happy Valley Rd

Data from public records.

Address	Redfin Estimate
3955 Happy Valley Rd, Lafayette, CA 7 Beds \| 8.5 Baths \| 13737 Sq. Ft.	$7,099,206
3936 Happy Valley Rd, Lafayette, CA 5 Beds \| 5.5 Baths \| 4937 Sq. Ft.	$6,186,875
3995 Happy Valley Rd, Lafayette, CA 4 Beds \| 4 Baths \| 3389 Sq. Ft.	$2,893,079
3947 Happy Valley Rd, Lafayette, CA 4 Beds \| 6 Baths \| 5588 Sq. Ft.	$12,573,345
4008 Happy Valley Rd, Lafayette, CA 4 Beds \| 4 Baths \| 3915 Sq. Ft.	$3,992,713
4001 Happy Valley Rd, Lafayette, CA 4 Beds \| 4 Baths \| 4498 Sq. Ft.	$5,103,487
3972 Happy Valley Rd, Lafayette, CA 4 Beds \| 4.5 Baths \| 7651 Sq. Ft.	$10,529,786

Address	Redfin Estimate
3957 Happy Valley Rd, Lafayette, CA 4 Beds \| 3 Baths \| 3440 Sq. Ft.	$3,857,929
3937 Happy Valley Rd, Lafayette, CA 6 Beds \| 5.5 Baths \| 5740 Sq. Ft.	$7,500,708
3965 Happy Valley Rd, Lafayette, CA 5 Beds \| 4 Baths \| 3726 Sq. Ft.	$4,026,428
3969 Happy Valley Rd, Lafayette, CA 4 Beds \| 3 Baths \| 2773 Sq. Ft.	$2,872,565
3991 Happy Valley Rd, Lafayette, CA 7 Beds \| 6 Baths \| 7403 Sq. Ft.	$6,927,488
3993 Happy Valley Rd, Lafayette, CA 3 Beds \| 5 Baths \| 4823 Sq. Ft.	$4,195,568
1232 Upper Happy Valley Rd, Lafayette, CA 3 Beds \| 3 Baths \| 2686 Sq. Ft.	$2,593,170

Address	Redfin Estimate
3938 Happy Valley Rd, Lafayette, CA 5 Beds \| 5.5 Baths \| - Sq. Ft.	$4,505,378
3959 Happy Valley Rd, Lafayette, CA 4 Beds \| 5 Baths \| 4408 Sq. Ft.	$5,217,625
3983 Happy Valley Rd, Lafayette, CA 5 Beds \| 6 Baths \| 5775 Sq. Ft.	$6,319,787
3981 Happy Valley Rd, Lafayette, CA 5 Beds \| 5 Baths \| 4734 Sq. Ft.	$3,541,756
3997 Happy Valley Rd, Lafayette, CA 4 Beds \| 3 Baths \| 2465 Sq. Ft.	$2,520,833
3941 Happy Valley Rd, Lafayette, CA 4 Beds \| 5.5 Baths \| 8620 Sq. Ft.	$7,791,093
1248 Upper Happy Valley Rd, Lafayette, CA 5 Beds \| 4.5 Baths \| 4830 Sq. Ft.	$4,033,345

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Earn from this home

Market trends in 94549, CA

Sale history for 3975 Happy Valley Rd

Tax history for 3975 Happy Valley Rd

Permits

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 94549

Home values near 3975 Happy Valley Rd

More real estate resources