$3,400,000
SOLD JUN 15, 2026

21 Cosso Ct Lafayette, CA 94549

Happy Valley Neighborhood
3 Beds
2.5 Baths
2,522 Sq Ft
0.96 Acre Lot

Sale Details

Date Sold: June 15, 2026

$1,348 Per Sq Ft

0 Day on Market

Highlights

  • Traditional Architecture
  • Wood Flooring
  • 2 Car Detached Garage
  • Happy Valley Elementary School Rated A
  • No HOA
  • Forced Air Heating System

About This Home

As of June 2026

This home is located at 21 Cosso Ct, Lafayette, CA 94549 and is currently priced at $3,400,000, approximately $1,348 per square foot. This property was built in 1915. 21 Cosso Ct is a home located in Contra Costa County with nearby schools including Happy Valley Elementary School, M.H. Stanley Middle School, and Acalanes High School.

Last Agent to Sell the Property

Ann Sharf

Village Associates Real Estate License #01156966 Listed on: 06/15/2026

Village Associates Real Estate

Last Buyer's Agent

Erin Martin

Compass License #01922810

Compass

Range of Values:

--
Value Increase
--
Percent Increase
--
Adjusted for Inflation
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Average Value
Not Available
List Price
Sold Price
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Home Details

Home Type

  • Single Family

Year Built

  • Built in 1915

Lot Details

  • 41,827 Sq Ft Lot

Parking

  • 2 Car Detached Garage
  • Carport

Home Design

  • Traditional Architecture
  • Composition Shingle Roof
  • Wood Siding

Interior Spaces

  • 2-Story Property
  • Family Room with Fireplace

Flooring

  • Wood
  • Carpet
  • Laminate

Bedrooms and Bathrooms

  • 3 Bedrooms

Utilities

  • No Cooling
  • Forced Air Heating System

Community Details

  • No Home Owners Association
  • Happy Valley Subdivision

Listing and Financial Details

  • Assessor Parcel Number 2461100162

Home Details

Home Type

Single Family

Year Built

Built in 1915

Lot Details

0.96 Acres

Parking

2

Listing Details

  • Stories: 2
  • Year Built: 1915
  • Property Sub Type: Detached
  • Prop. Type: Residential
  • Subdivision Name: Happy Valley
  • Directions: HVR - Cosso Ct
  • Architectural Style: Traditional
  • Garage Yn: Yes
  • Unit Levels: Two Story
  • New Construction: No
  • Special Features: None

Interior Features

  • Flooring: Hardwood, Laminate, Carpet
  • Other Equipment: None
  • Full Bathrooms: 2
  • Total Bedrooms: 3
  • Fireplace Features: Family Room
  • Fireplaces: 1
  • Fireplace: Yes
  • Room Kitchen Features: None

Exterior Features

  • Roof: Composition Shingles
  • Lot Features: Premium Lot
  • Pool Features: None
  • Pool Private: No
  • Construction Type: Wood Siding
  • Property Condition: Existing

Garage/Parking

  • Garage Spaces: 2
  • Parking Features: Carport, Detached

Utilities

  • Heating: Forced Air
  • Cooling: None
  • Laundry Features: Laundry Room
  • Cooling Y N: No
  • Heating Yn: Yes
  • Electric: No Solar
  • Water Source: Public District (Irrigat)

Condo/Co-op/Association

  • Association: No

Lot Info

  • Lot Size Sq Ft: 41827
  • Parcel Number: 2461100162

Ownership History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Name Owned For Owner Type

Purchase Details

Listed on
Jun 15, 2026
Closed on
Jun 10, 2026
Sold by
Bought by
Seller's Agent
Ann Sharf
Village Associates Real Estate
Buyer's Agent
Erin Martin
Compass
List Price
$3,400,000
Sold Price
$3,400,000
Views
11

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Avg. Annual Appreciation
-10.88%

Purchase Details

Closed on
Jul 21, 2016
Sold by
Bought by

Purchase Details

Closed on
May 1, 2001
Sold by
Bought by

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$350,000
Interest Rate
6.25%
Mortgage Type
Purchase Money Mortgage

Purchase Details

Closed on
Apr 4, 2001
Sold by
Bought by

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$350,000
Interest Rate
6.25%
Mortgage Type
Purchase Money Mortgage

Purchase Details

Closed on
Jan 14, 2000
Sold by
Bought by

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$450,000
Interest Rate
3.95%
Mortgage Type
Purchase Money Mortgage

Purchase Details

Closed on
Jan 6, 2000
Sold by
Bought by

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$450,000
Interest Rate
3.95%
Mortgage Type
Purchase Money Mortgage

Purchase Details

Closed on
Feb 25, 1998
Sold by
Bought by

Purchase Details

Closed on
Feb 12, 1998
Sold by
Bought by
Source: Public Records

Home Values in the Area

Source: Public Records

Average Home Value in this Area

Source: Public Records

Agents Specializing in Happy Valley, CA

  • Ben Olsen Real Estate Agent - Brightwork Realty Advocates

    Ben Olsen

    Brightwork Realty Advocates

    (925) 940-8628

    125 Total Sales

    1 in Happy Valley

    $1,810,000 Price

    Ben Olsen
     Section Image
  • Soraya Golesorkhi Real Estate Agent - Village Associates Real Estate

    Soraya Golesorkhi

    Village Associates Real Estate

    (925) 326-6671

    48 Total Sales

    2 in Happy Valley

    $2.4M - $3M Price Range

    Soraya Golesorkhi
     Section Image
  • Rita Dhillon Real Estate Agent - Compass

    Rita Dhillon

    Compass

    (925) 306-1395

    80 Total Sales

    1 in Happy Valley

    $4,250,000 Price

    Rita Dhillon
     Section Image
  • Kelly Crawford Real Estate Agent - Vanguard Properties

    Kelly Crawford

    Vanguard Properties

    (925) 396-7158

    217 Total Sales

    4 in Happy Valley

    $1.1M - $3M Price Range

    Kelly Crawford
     Section Image
  • Joakim Bye Real Estate Agent - Ocean Element Real Estate

    Joakim Bye

    Ocean Element Real Estate

    (650) 600-9932

    45 Total Sales

    1 in Happy Valley

    $2,600,000 Price

    Joakim Bye
     Section Image
  • Kat Sellis Real Estate Agent - Real Broker

    Kat Sellis

    Real Broker

    (925) 940-8695

    88 Total Sales

    2 in Happy Valley

    $2.6M - $4M Price Range

    Kat Sellis
     Section Image
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Purchase History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Type Sale Price Title Company
Grant Deed $3,400,000 Old Republic Title
Interfamily Deed Transfer -- None Available
Interfamily Deed Transfer -- --
Gift Deed -- Placer Title Company
Interfamily Deed Transfer -- --
Gift Deed -- Placer Title Company
Interfamily Deed Transfer -- Placer Title Company
Interfamily Deed Transfer -- Placer Title Company
Source: Public Records

Mortgage History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Status Loan Amount Loan Type
Previous Owner $938,250 Reverse Mortgage Home Equity Conversion Mortgage
Previous Owner $75,000 Credit Line Revolving
Previous Owner $350,000 Purchase Money Mortgage
Previous Owner $450,000 Purchase Money Mortgage
Previous Owner $50,000 Credit Line Revolving
Source: Public Records

Property History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Event Price List to Sale Price per Sq Ft
06/15/2026 06/15/26 Sold $3,400,000 0.0% $1,348 / Sq Ft
06/15/2026 06/15/26 For Sale $3,400,000 -- $1,348 / Sq Ft
Source: Contra Costa Association of REALTORS®

Tax History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2026 $8,144 $693,105 $300,218 $392,887
2025 $8,144 $679,516 $294,332 $385,184
2024 $7,848 $666,193 $288,561 $377,632
2023 $7,848 $653,131 $282,903 $370,228
2022 $7,733 $640,325 $277,356 $362,969
2021 $7,500 $627,770 $271,918 $355,852
2019 $7,427 $609,152 $263,853 $345,299
2018 $7,155 $597,209 $258,680 $338,529
2017 $7,004 $585,500 $253,608 $331,892
2016 $6,861 $574,021 $248,636 $325,385
2015 $6,662 $565,400 $244,902 $320,498
2014 $6,590 $554,325 $240,105 $314,220
Source: Public Records

Agents Affiliated with this Home

  • Ann Sharf Real Estate Agent - Village Associates Real Estate

    Seller's Agent in 2026

    Ann Sharf

    Village Associates Real Estate

    (925) 253-2525

    8 in this area

    150 Total Sales

    Ann Sharf
    Section Image
  • Erin Martin Real Estate Agent - Compass

    Buyer's Agent in 2026

    Erin Martin

    Compass

    (925) 951-3817

    12 in this area

    156 Total Sales

    Erin Martin
    Section Image
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Map

Source: Contra Costa Association of REALTORS®

MLS Number: 41138433

Contra Costa Association of REALTORS®

APN: 246-110-016-2

California Contra Costa County Lafayette 94549 Happy Valley

21 Cosso Ct, Lafayette, CA

Disclaimer: Certain information contained herein is derived from information provided by parties other than Homes.com. All information provided is deemed reliable, but is not guaranteed to be accurate and should be independently verified.

Contra Costa Association of REALTORS® Bay East ©2026. BridgeMLS ©2026, CCAR ©2026. Information Deemed Reliable But Not Guaranteed. This information is being provided by the Bay East MLS, BridgeMLS or CCAR MLS. The listings presented here may or may not be listed by the Broker/Agent operating this website. This information is intended for the personal use of consumers, and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.

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