OFF MARKET

Off Market Apr 2010 for $1.6M

$3,435,372

Est. refi paymentEst. refi $6,802/mo

•

2,713

sq ft

3670 Happy Valley Rd, Lafayette, CA 94549

About this home

Single-familyProperty Type

1955Year Built

1.16 acresLot Size

$1,266Est. Price/Sq.Ft.

2 car garageParking

Listed by Susan Zeh Layng •DRE #00970956 • Village Associates Real Estate

Bought with Sherrie Perlstein •DRE #00925213 • Prudential California Realty

Redfin checked: a few seconds ago

•Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #40423851

Redfin Estimate

$3,435,372

$1.8M since sold in April 2010$32K since July

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 23% higher than the average sale price ($2.79M) of 6 comparable homes.

SOLD JUN 12, 2026
$2,810,000
A
4 beds3.5 baths2,442 sq ft
1125 Glen Rd, Lafayette, CA 94549
SOLD JUN 17, 2026
$2,365,000
B
4 beds3 baths2,531 sq ft
1119 Oak Hill Rd, Lafayette, CA 94549
SOLD JUN 1, 2026
$2,405,000
C
3 beds3 baths2,282 sq ft
3345 Ridge Rd, Lafayette, CA 94549
SOLD JUN 15, 2026
$3,400,000
D
3 beds2.5 baths2,522 sq ft
21 Cosso Ct, Lafayette, CA 94549
SOLD DEC 23, 2025
$1,825,000
E
4 beds3 baths3,049 sq ft
3399 Goyak, Lafayette, CA 94549
SOLD JUN 2, 2026
$3,950,000
F
4 beds3 baths3,311 sq ft
3853 Palo Alto Dr, Lafayette, CA 94549

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Earn from this home

Sell

$2,448,015

Est. take-home

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Est. cash available

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Rent

$9,383/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

15 MoM

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See all

Provided by Redfin

Sale history for 3670 Happy Valley Rd

Year

Property tax

Land + Additions

Assessment*

2025

$30,872 (+1.7%)

$1,316,633 + $1,380,936

$2,697,569

2024

$30,353 (+1.7%)

$1,290,817 + $1,353,859

$2,644,676

2023

$29,842 (+1.5%)

$1,265,507 + $1,327,313

$2,592,820

2022

$29,389 (+3.0%)

$1,240,694 + $1,301,288

$2,541,982

2021

$28,541 (+2.0%)

$1,216,367 + $1,275,773

$2,492,140

2020

$27,970 (+2.0%)

$1,192,517 + $1,250,758

$2,443,275

2019

$27,409 (+3.7%)

$1,180,290 + $1,172,934

$2,353,224

2018

$26,441 (+1.7%)

$1,157,148 + $1,149,936

$2,307,084

2017

$25,988 (+1.8%)

$1,112,215 + $1,105,284

$2,217,499

2016

$25,532 (+2.7%)

$1,112,215 + $1,105,284

$2,217,499

2015

$24,849 (+0.8%)

$1,090,407 + $1,083,612

$2,174,019

2014

$24,658 (+1.1%)

$1,052,991 + $1,046,429

$2,099,420

2013

$24,395 (+70.3%)

$1,052,991 + $1,046,429

$2,099,420

2012

$14,327 (−21.7%)

$1,048,233 + $1,041,700

$2,089,933

2011

$18,287 (+515.9%)

$919,881 + $274,000

$1,193,881

2010

$2,969 (+30.9%)

$919,881 + $630,119

$1,550,000

2009

$2,269 (+1.5%)

$58,856 + $117,742

$176,598

2008

$2,234

$58,996 + $118,022

$177,018

Tax history for 3670 Happy Valley Rd

Year

Property tax

Land + Additions

Assessment*

2025

$30,872 (+1.7%)

$1,316,633 + $1,380,936

$2,697,569

2024

$30,353 (+1.7%)

$1,290,817 + $1,353,859

$2,644,676

2023

$29,842 (+1.5%)

$1,265,507 + $1,327,313

$2,592,820

2022

$29,389 (+3.0%)

$1,240,694 + $1,301,288

$2,541,982

2021

$28,541 (+2.0%)

$1,216,367 + $1,275,773

$2,492,140

2020

$27,970 (+2.0%)

$1,192,517 + $1,250,758

$2,443,275

2019

$27,409 (+3.7%)

$1,180,290 + $1,172,934

$2,353,224

2018

$26,441 (+1.7%)

$1,157,148 + $1,149,936

$2,307,084

2017

$25,988 (+1.8%)

$1,112,215 + $1,105,284

$2,217,499

2016

$25,532 (+2.7%)

$1,112,215 + $1,105,284

$2,217,499

2015

$24,849 (+0.8%)

$1,090,407 + $1,083,612

$2,174,019

2014

$24,658 (+1.1%)

$1,052,991 + $1,046,429

$2,099,420

2013

$24,395 (+70.3%)

$1,052,991 + $1,046,429

$2,099,420

2012

$14,327 (−21.7%)

$1,048,233 + $1,041,700

$2,089,933

2011

$18,287 (+515.9%)

$919,881 + $274,000

$1,193,881

2010

$2,969 (+30.9%)

$919,881 + $630,119

$1,550,000

2009

$2,269 (+1.5%)

$58,856 + $117,742

$176,598

2008

$2,234

$58,996 + $118,022

$177,018

*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

Stories

Lot width

—

Lot depth

—

Lot size

1.16 Acres

Year renovated

2012

Sq. Ft.

4,187

Year built

2011

Style

Single Family Residential

County

Contra Costa County

APN

2441600109

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Jul 13, 2026.

Jan 9, 2023 • Final

Permit submittal

Remodel the front entrance by moving the front wall forward to create a new enclosed area under the existing roof. Construct a new portico with asphalt shingles over the new front door. Install new electrical light fixtures, wall outlets, and switches.

Remodel

Jun 1, 2020 • Final

Building/residential/p/pool

Construct a new pool and spa with a heater and pool equipment.

Pool and hot tub

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: Workshop in Garage, Garage Door Opener

Interior

Virtual Tour

Bathroom Information
# of Bathrooms Total: 3
# of Bathrooms Full: 3
Other Bathrooms Included Features: Tub
Primary Bathroom Included Features: Stall Shower

Interior Features
Interior Features: Workshop, Laminate Counters
Appliances: Dishwasher, Gas Range, Oven
Laundry Features: Hookups Only, Laundry Room
Street Level Features: 3 Bedrooms, 3 Baths, Primary Bedrm Suite - 1, No Steps to Entry
Fireplaces Total: 1
Has Fireplace

Room Information
Kitchen Features: Counter - Laminate,Dishwasher,Gas Range/Cooktop,Oven Built-in
Rooms Total: 9
Fireplace Features: Living Room
Basement: Crawl Space

Exterior

Building Information
Construction Materials: Brick, Wood Siding
Building Area Total: 2,713

Exterior Features
Patio And Porch Features: Patio, Covered, Enclosed
Exterior Features: Back Yard, Front Yard, Garden/Play, Side Yard, Sprinklers Automatic, Storage

Property Information
Living Area: 2713
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 1955

Lot Information
Other Structures: Shed(s)
Lot Size Square Feet: 50529
Lot Size Area: 1.16
Lot Size Units: Acres
Lot Size Acres: 1.16
Lot Features: Cul-De-Sac, Level, Premium Lot, Secluded

Utilities

Utility Information
Water Source: Public
Sewer: Public Sewer

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: 5.0
Sq. Ft.: 4,187
Stories: 1.0
Lot Size: 1.16 acres
Style: Single Family Residential
Year Built: 2011
Year Renovated: 2012
County: Contra Costa County
APN: 2441600109

Home facts updated by county records on Jul 13, 2026

Around this home

Schools

Happy Valley Elementary School

Public K-5 • Assigned • 0.9mi

8/10

M. H. Stanley Middle School

Public 6-8 • Assigned • 1.1mi

8/10

Acalanes High School

Public 9-12 • Assigned • 1.7mi

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

0.93% chance of being in a wildfire in next 30 years

3/10 Heat Factor

7 days above 93° 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

$3.26M – $3.95M

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Home values near 3670 Happy Valley Rd

Data from public records.

Address	Redfin Estimate
3682 Happy Valley Road, Lafayette, CA 4 Beds \| 3.5 Baths \| 3317 Sq. Ft.	$3,696,257
3668 Happy Valley Road, Lafayette, CA 4 Beds \| 2.5 Baths \| 3658 Sq. Ft.	$3,907,703

Address	Redfin Estimate
3666 Happy Valley Road, Lafayette, CA 6 Beds \| 7.5 Baths \| 6890 Sq. Ft.	$6,249,623
3660 Happy Valley Road, Lafayette, CA 5 Beds \| 6.5 Baths \| 5235 Sq. Ft.	$4,330,285

Address	Redfin Estimate
3664 Happy Valley Road, Lafayette, CA 4 Beds \| 3 Baths \| 2906 Sq. Ft.	$2,810,819
3674 Happy Valley Road, Lafayette, CA 3 Beds \| 4.5 Baths \| 5242 Sq. Ft.	$4,878,257

Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2009. This data may not match . 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 3670 Happy Valley Rd

Tax history for 3670 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 3670 Happy Valley Rd

More real estate resources