OFF MARKET

Off Market Nov 2021 for $2M

$3,270,100

Est. refi paymentEst. refi $13,067/mo

•

3,902

sq ft

3920 Happy Valley Rd, Lafayette, CA 94549

About this home

What can you get for under 3 million on Happy Valley Road? 4,000 Square footage of living space and tons of possibilities! First time on market in 35 years, architect’s masterpiece.The hexagonal house strikes all visitors' eyes from the very moment of entering. A lightly-stained redwood ceiling climbs to an 18-foot peak at the center, where it meets a free standing fireplace of white dolomite block pillars contrast to acid washed aged copper panels, between them at the hub are skylights.The big primary bedroom on the main floor opens onto a private terrace, with the living room, dining room and kitchen on the same level; three bedrooms, one full bathroom and the utility/laundry room are cut like pie slices out of the lower level. Enjoy the fully upgraded sleek and sophisticated modern kitchen with glossy cabinets, marble countertop and high-end kitchen appliances. This home is pure geometry and math. You will feel the free flow of space and air and light.

Single-familyProperty Type

1966Year Built

1.06 acresLot Size

$838Est. Price/Sq.Ft.

2 car garageParking

Listed by Lingya Zhang •DRE #02055184 • Keller Williams Realty

Bought with Lawrence Ng •DRE #01336005 • 4 USA Loans, Inc.

Redfin checked: a few seconds ago

•Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #40959548

Redfin Estimate

$3,270,100

$1.3M since sold in November 2021$23K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 2.6% lower than the average sale price ($3.36M) of 6 comparable homes.

SOLD AUG 20, 2026
$2,000,000
A
4 beds2.5 baths2,931 sq ft
1066 Via Baja, Lafayette, CA 94549
SOLD MAY 15, 2026
$2,450,000
B
4 beds2 baths2,686 sq ft
3958 Los Arabis Dr, Lafayette, CA 94549
SOLD JUN 2, 2026
$3,950,000
C
4 beds3 baths3,311 sq ft
3853 Palo Alto Dr, Lafayette, CA 94549
SOLD AUG 26, 2026
$4,800,000
D
4 beds3.5 baths4,033 sq ft
3954 S Peardale Dr, Lafayette, CA 94549
SOLD AUG 21, 2026
$4,250,000
E
4 beds3.5 baths3,399 sq ft
3814 Happy Valley Rd, Lafayette, CA 94549
SOLD DEC 29, 2025
$2,700,000
F
4 beds4 baths4,150 sq ft
3938 Los Arabis Dr, Lafayette, CA 94549

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Earn from this home

Sell

$1,644,420

Est. take-home

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Refinance

Est. cash available

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Rent

$9,621/mo

Redfin rental estimate

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Market trends in 94549, CA

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

101.8%

0.2% MoM

Median sale price

$2.0M

$26K MoM

Avg. days on market

17d

2 days MoM

Recently sold homes

103

4 MoM

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Tom Linthicum RE Company
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$2,799,000
5 beds3.5 baths3,500 sq ft
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OPEN SAT, 12PM TO 2PM
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(415) 660-9955
OPEN SAT, 1PM TO 4PM
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See all

Provided by Redfin

Sale history for 3920 Happy Valley Rd

Year

Property tax

Land + Additions

Assessment*

2025

$25,979 (+1.7%)

$1,515,404 + $722,286

$2,237,690

2024

$25,541 (+4.9%)

$1,485,691 + $708,124

$2,193,815

2023

$24,358 (+1.5%)

$1,456,560 + $694,240

$2,150,800

2022

$23,988 (+108.7%)

$1,428,000 + $612,000

$2,040,000

2021

$11,495

$1,400,000 + $600,000

$2,000,000

2020

$11,492 (+4.3%)

$423,332 + $451,982

$875,314

2019

$11,020 (+3.6%)

$418,992 + $447,348

$866,340

2018

$10,634 (+1.7%)

$410,777 + $438,577

$849,354

2017

$10,453 (+2.0%)

$394,827 + $421,548

$816,375

2016

$10,245 (+2.8%)

$394,827 + $421,548

$816,375

2015

$9,965 (+1.0%)

$387,086 + $413,283

$800,369

2014

$9,865 (+1.3%)

$373,804 + $399,102

$772,906

2013

$9,741 (+3.1%)

$373,804 + $399,102

$772,906

2012

$9,447 (+1.6%)

$372,115 + $397,299

$769,414

2011

$9,296 (+2.9%)

$364,819 + $389,509

$754,328

2010

$9,032 (+0.9%)

$357,666 + $381,872

$739,538

2009

$8,951 (+1.7%)

$354,993 + $379,018

$734,011

2008

$8,799

$355,837 + $379,919

$735,756

Tax history for 3920 Happy Valley Rd

Year

Property tax

Land + Additions

Assessment*

2025

$25,979 (+1.7%)

$1,515,404 + $722,286

$2,237,690

2024

$25,541 (+4.9%)

$1,485,691 + $708,124

$2,193,815

2023

$24,358 (+1.5%)

$1,456,560 + $694,240

$2,150,800

2022

$23,988 (+108.7%)

$1,428,000 + $612,000

$2,040,000

2021

$11,495

$1,400,000 + $600,000

$2,000,000

2020

$11,492 (+4.3%)

$423,332 + $451,982

$875,314

2019

$11,020 (+3.6%)

$418,992 + $447,348

$866,340

2018

$10,634 (+1.7%)

$410,777 + $438,577

$849,354

2017

$10,453 (+2.0%)

$394,827 + $421,548

$816,375

2016

$10,245 (+2.8%)

$394,827 + $421,548

$816,375

2015

$9,965 (+1.0%)

$387,086 + $413,283

$800,369

2014

$9,865 (+1.3%)

$373,804 + $399,102

$772,906

2013

$9,741 (+3.1%)

$373,804 + $399,102

$772,906

2012

$9,447 (+1.6%)

$372,115 + $397,299

$769,414

2011

$9,296 (+2.9%)

$364,819 + $389,509

$754,328

2010

$9,032 (+0.9%)

$357,666 + $381,872

$739,538

2009

$8,951 (+1.7%)

$354,993 + $379,018

$734,011

2008

$8,799

$355,837 + $379,919

$735,756

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

Public record

Public record
Permits

Beds

Baths

3.5

Stories

Lot width

—

Lot depth

—

Lot size

46,174

Year renovated

1985

Sq. Ft.

3,902

Year built

1966

Style

Single Family Residential

County

Contra Costa County

APN

2460500156

Parking Spaces

Basement

Accessible

HOA Dues

—

Garage

Yes

Features

Pool

Last updated by owner on Jul 26, 2024.

Oct 3, 2023 • Final

Building/residential/al/alteration

Perform an interior remodel and alteration including a concrete slab replacement. The project includes electrical, mechanical, and plumbing work for the kitchen and four bathrooms. Relocate two bedrooms from the lower level to the main level.

Bathroom

Electrical

HVAC

Plumbing

Remodel

May 3, 2022 • Final

Permit submittal

Perform an interior remodel and replace a damaged concrete slab. The project includes mechanical, electrical, and plumbing work for the kitchen and four bathrooms. Relocate two bedrooms from the lower level to the main level while keeping the existing stairs, fireplace, and roof unchanged.

Bathroom

Electrical

Kitchen

Plumbing

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

Parking

Parking Information
Garage Spaces: 2
Covered Spaces: 2
Parking Features: Detached, Guest, Garage Door Opener

Interior

Virtual Tour

Bathroom Information
# of Bathrooms Total: 3
# of Bathrooms Full: 2
# of Bathrooms Partial: 1
Other Bathrooms Included Features: Solid Surface, Sunken Tub, Tile, Tub with Jets
Primary Bathroom Included Features: Solid Surface, Split Bath, Sunken Tub, Tile, Tub, Double Sinks, Granite

Interior Features
Interior Features: No Additional Rooms, Breakfast Nook, Counter - Solid Surface, Eat-in Kitchen, Updated Kitchen
Appliances: Dishwasher, Disposal, Gas Range, Microwave, Oven, Range, Refrigerator, Self Cleaning Oven, Dryer, Washer, Gas Water Heater
Laundry Features: 220 Volt Outlet, Dryer, Laundry Room, Washer
Street Level Features: Primary Bedrm Suite - 1, Main Entry
Window Features: Double Pane Windows, Bay Window(s)
Fireplaces Total: 1
Has Fireplace
Flooring: Tile, Carpet, Engineered Wood

Room Information
Kitchen Features: Breakfast Nook,Counter - Solid Surface,Dishwasher,Eat In Kitchen,Garbage Disposal,Gas Range/Cooktop,Microwave,Oven Built-in,Range/Oven Built-in,Refrigerator,Self-Cleaning Oven,Updated Kitchen
Rooms Total: 10
Fireplace Features: Brick, Free Standing, Gas, Gas Starter, Living Room, Metal

Exterior

Building Information
Construction Materials: Composition Shingles, Wood Siding, Glass
Building Area Total: 3,902

Exterior Features
Exterior Features: Back Yard, Front Yard, Side Yard, Sprinklers Back, Sprinklers Front, Sprinklers Side, Landscape Front, Low Maintenance, Private Entrance
Fencing: Partial
Roof: Shingle

Pool Information
Pool Features: Above Ground, Outdoor Pool
Has Private Pool

Property Information
Living Area: 3902
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 1966

Lot Information
Lot Size Square Feet: 46174
Lot Size Area: 1.06
Lot Size Units: Acres
Lot Size Acres: 1.06
Lot Features: Landscape Front, Paved, Private

Utilities

Utility Information
Water Source: Public
Electric: Solar Unknown
Sewer: Public Sewer
Utilities: Irrigation Available, All Public Utilities, Master Electric Meter, Master Gas Meter

Heating & Cooling
Has Heating
Heating: Forced Air
Cooling: Central Air

Location

School Information
High School District: Acalanes (925) 280-3900

Public facts

Beds: 4
Baths: 3.5
Sq. Ft.: 3,902
Stories: 1.0
Parking Spaces: 2
Basement: No
Accessible: No
Lot Size: 1.06 acres
Style: Single Family Residential
Year Built: 1966
Year Renovated: 1985
County: Contra Costa County
APN: 2460500156
HOA Dues: —
Garage: Yes
Features: Pool

Home facts updated by owner on Jul 26, 2024

Around this home

Schools

Happy Valley Elementary School

Public K-5 • Assigned • 0.3mi

8/10

M. H. Stanley Middle School

Public 6-8 • Assigned • 2.2mi

8/10

Acalanes High School

Public 9-12 • Assigned • 2.7mi

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)

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

$3.11M – $3.76M

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Home values near 3920 Happy Valley Rd

Data from public records.

Address	Redfin Estimate
3900 Happy Valley Rd, Lafayette, CA 5 Beds \| 3 Baths \| 2896 Sq. Ft.	$2,904,804
3893 Happy Valley Rd, Lafayette, CA 3 Beds \| 3 Baths \| 2715 Sq. Ft.	$2,207,570

Address	Redfin Estimate
3915 Happy Valley Rd, Lafayette, CA 6 Beds \| 6.5 Baths \| 6940 Sq. Ft.	$10,118,109
3957 Happy Valley Rd, Lafayette, CA 4 Beds \| 3 Baths \| 3440 Sq. Ft.	$3,782,419

Address	Redfin Estimate
3955 Happy Valley Rd, Lafayette, CA 7 Beds \| 8.5 Baths \| 13737 Sq. Ft.	$8,622,277
3938 Happy Valley Rd, Lafayette, CA 5 Beds \| 5.5 Baths \| - Sq. Ft.	$4,358,499

Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2021. This data may not show owner updates. Learn more.

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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 3920 Happy Valley Rd

Tax history for 3920 Happy Valley Rd

Public record

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 3920 Happy Valley Rd

More real estate resources