OFF MARKET

Off Market May 2011 for $265K

$709,610

Est. refi paymentEst. refi $1,201/mo

•

2,033

sq ft

3404 Keystone Loop, Discovery Bay, CA 94514

About this home

Single-familyProperty Type

2003Year Built

7,800 sq ftLot Size

$349Est. Price/Sq.Ft.

2 car garageParking

Listed by Christos Soukoulis •DRE #01852404 • Corcoran Icon Properties

Bought with Darrell Hanson •DRE #01293448 • Corcoran Icon Properties

Redfin checked: a minute ago

•Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #40519651

Redfin Estimate

$709,610

$445K since sold in May 2011$1,000 since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 15.2% lower than the average sale price ($837K) of 6 comparable homes.

SOLD AUG 17, 2026
$649,900
A
3 beds2 baths1,886 sq ft
705 Pardee Ct, Discovery Bay, CA 94505
SOLD MAY 4, 2026
$721,305
B
3 beds2 baths2,178 sq ft
550 Lee Loop, Discovery Bay, CA 94505
SOLD AUG 17, 2026
$765,000
C
3 beds2 baths2,123 sq ft
5250 Edgeview Dr, Discovery Bay, CA 94505
SOLD FEB 10, 2026
$1,185,000
D
3 beds2 baths2,051 sq ft
4174 Beacon Pl, Discovery Bay, CA 94505
SOLD AUG 21, 2026
$965,000
E
3 beds2 baths1,763 sq ft
4839 Cabrillo Pt, Discovery Bay, CA 94505
SOLD APR 2, 2026
$735,000
F
3 beds2 baths1,886 sq ft
8301 Brookhaven Cir, Discovery Bay, CA 94505

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Earn from this home

Sell

$537,852

Est. take-home

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Refinance

Est. cash available

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Rent

$3,380/mo

Redfin rental estimate

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Market trends in 94505, CA

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

97.7%

0.6% MoM

Median sale price

$792K

$8K MoM

Avg. days on market

34d

7 days MoM

Recently sold homes

2 MoM

New listings for sale

NEW 12 HRS AGO
$682,500
4 beds2 baths1,760 sq ft
2419 Imperial Ct, Discovery Bay, CA 94505
NEW 17 HRS AGO
$689,000
4 beds3 baths2,698 sq ft
2652 Crescent Way, Discovery Bay, CA 94505
LISTED BY REDFIN
$849,000
4 beds3 baths2,455 sq ft
1280 Saint Andrews Dr, Discovery Bay, CA 94505
OPEN SUN, 12PM TO 2PM
$450,000
2 beds2 baths1,248 sq ft
5679 Schooner Loop, Discovery Bay, CA 94505
$549,999
4 beds2.5 baths1,782 sq ft
4108 Regatta Dr, Discovery Bay, CA 94505
COMING SOON
$574,900
3 beds2 baths1,484 sq ft
3733 Catamaran Ct, Discovery Bay, CA 94505
$850,000
5 beds4 baths3,917 sq ft
3159 Castle Rock Loop, Discovery Bay, CA 94505
COMING SOON
$685,000
4 beds2.5 baths1,706 sq ft
3524 Sailboat Dr, Discovery Bay, CA 94505
$799,000
4 beds3 baths2,762 sq ft
2353 Wayfarer Dr, Discovery Bay, CA 94505
$1,075,000
4 beds2.5 baths2,493 sq ft
1650 Riverlake Rd, Discovery Bay, CA 94505
See all

Provided by Redfin

Sale history for 3404 Keystone Loop

Year

Property tax

Land + Additions

Assessment*

2025

$5,829 (+6.0%)

$39,198 + $307,093

$346,291

2024

$5,498 (+1.6%)

$38,430 + $301,072

$339,502

2023

$5,410 (+1.7%)

$37,677 + $295,169

$332,846

2022

$5,319 (+2.3%)

$36,939 + $289,382

$326,321

2021

$5,197 (+0.7%)

$36,215 + $283,708

$319,923

2020

$5,163 (+1.4%)

$35,505 + $278,146

$313,651

2019

$5,091 (+4.2%)

$35,141 + $275,294

$310,435

2018

$4,887 (+2.4%)

$34,452 + $269,897

$304,349

2017

$4,771 (+6.4%)

$33,115 + $259,417

$292,532

2016

$4,482 (+3.5%)

$33,115 + $259,417

$292,532

2015

$4,330 (+2.1%)

$32,466 + $254,331

$286,797

2014

$4,243 (+1.1%)

$31,353 + $245,604

$276,957

2013

$4,199 (+5.9%)

$31,353 + $245,604

$276,957

2012

$3,963 (+1.1%)

$31,212 + $244,494

$275,706

2011

$3,919 (+2.4%)

$28,868 + $226,132

$255,000

2010

$3,827 (−5.0%)

$80,778 + $164,722

$245,500

2009

$4,028 (−27.9%)

$80,942 + $165,058

$246,000

2008

$5,586

$89,004 + $181,496

$270,500

Tax history for 3404 Keystone Loop

Year

Property tax

Land + Additions

Assessment*

2025

$5,829 (+6.0%)

$39,198 + $307,093

$346,291

2024

$5,498 (+1.6%)

$38,430 + $301,072

$339,502

2023

$5,410 (+1.7%)

$37,677 + $295,169

$332,846

2022

$5,319 (+2.3%)

$36,939 + $289,382

$326,321

2021

$5,197 (+0.7%)

$36,215 + $283,708

$319,923

2020

$5,163 (+1.4%)

$35,505 + $278,146

$313,651

2019

$5,091 (+4.2%)

$35,141 + $275,294

$310,435

2018

$4,887 (+2.4%)

$34,452 + $269,897

$304,349

2017

$4,771 (+6.4%)

$33,115 + $259,417

$292,532

2016

$4,482 (+3.5%)

$33,115 + $259,417

$292,532

2015

$4,330 (+2.1%)

$32,466 + $254,331

$286,797

2014

$4,243 (+1.1%)

$31,353 + $245,604

$276,957

2013

$4,199 (+5.9%)

$31,353 + $245,604

$276,957

2012

$3,963 (+1.1%)

$31,212 + $244,494

$275,706

2011

$3,919 (+2.4%)

$28,868 + $226,132

$255,000

2010

$3,827 (−5.0%)

$80,778 + $164,722

$245,500

2009

$4,028 (−27.9%)

$80,942 + $165,058

$246,000

2008

$5,586

$89,004 + $181,496

$270,500

*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
Zoning
Permits

Beds

Baths

Stories

Lot width

—

Lot depth

—

Lot size

7,800 Sq. Ft.

Year renovated

2003

Sq. Ft.

2,033

Year built

2003

Style

Single Family Residential

County

Contra Costa County

APN

0114210446

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Jul 13, 2026.

P-1

Planned Unit District

A large-scale integrated development or a general plan special area of concern provides an opportunity for, and requires cohesive design when flexible regulations are applied; whereas the application of conventional regulation, designed primarily for individual lot development, to a large-scale development or special area may create a monotonous and inappropriate neighborhood. The planned unit district is intended to allow diversification in the relationship of various uses, buildings, structures, lot sizes and open space while insuring substantial compliance with the general plan and the intent of the county code in requiring adequate standards necessary to satisfy the requirements of the public health, safety and general welfare. These standards shall be observed without unduly inhibiting the advantages of large-scale site or special area planning.

Permitted uses

Include but are not limited to:

Housing-Single unit

Oct 5, 2022 • Final

Building - residential plumbing

Replace a water heater in the same location.

Plumbing

Water heater

Feb 20, 2003 • Final

Building/residential/r/new single family-duplex

New construction

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
Has Attached Garage
Garage Spaces: 2
Covered Spaces: 2
Parking Features: Attached, Garage, Int Access From Garage, Side Yard Access, Garage Door Opener

Interior

Bathroom Information
# of Bathrooms Total: 2
# of Bathrooms Full: 2
Other Bathrooms Included Features: Shower Over Tub, Solid Surface, Tub
Primary Bathroom Included Features: Solid Surface, Stall Shower, Tub with Jets

Interior Features
Interior Features: Bonus/Plus Room, Den, Dining Area, Kitchen/Family Combo, Breakfast Nook, Laminate Counters, Counter - Solid Surface, Kitchen Island, Updated Kitchen
Appliances: Dishwasher, Disposal, Gas Range, Microwave, Oven, Refrigerator, Self Cleaning Oven, Gas Water Heater
Laundry Features: 220 Volt Outlet, Gas Dryer Hookup, Hookups Only, Laundry Room
Street Level Features: 3 Bedrooms, 2 Baths, Primary Bedrm Suite - 1, Laundry Facility, Main Entry
Window Features: Double Pane Windows, Window Coverings
Fireplaces Total: 1
Has Fireplace
Flooring: Concrete, Laminate, Tile, Carpet

Room Information
Kitchen Features: Breakfast Nook,Counter - Laminate,Counter - Solid Surface,Dishwasher,Garbage Disposal,Gas Range/Cooktop,Island,Microwave,Oven Built-in,Refrigerator,Self-Cleaning Oven,Updated Kitchen
Rooms Total: 7
Fireplace Features: Family Room, Gas

Exterior

Building Information
Construction Materials: Stone, Stucco
Building Area Total: 2,033
Foundation Details: Slab

Exterior Features
Patio And Porch Features: Patio
Exterior Features: Back Yard, Front Yard, Side Yard, Sprinklers Automatic, Sprinklers Back, Sprinklers Front, Sprinklers Side
Fencing: Fenced

Property Information
Living Area: 2033
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 2003

Lot Information
Lot Size Square Feet: 7800
Lot Size Area: 0.18
Lot Size Units: Acres
Lot Size Acres: 0.18
Lot Features: Corner Lot, Sloped Down
Zoning: P-1

Utilities

Utility Information
Water Source: Public
Sewer: Public Sewer

Heating & Cooling
Has Heating
Heating: Forced Air
Cooling: Ceiling Fan(s), Central Air

Location

Homeowners Association Information
Has Association
Association Amenities: Pool, Gated
Association Name: LAKESHORE HOA
Association Fee: $170
Association Fee Includes: Management Fee, Security/Gate Fee
Association Fee Frequency: Monthly

School Information
High School District: Not Listed

Public facts

Beds: 3
Baths: 2.0
Sq. Ft.: 2,033
Stories: 1.0
Lot Size: 7,800 square feet
Style: Single Family Residential
Year Built: 2003
Year Renovated: 2003
County: Contra Costa County
APN: 0114210446

Home facts updated by county records on Jul 13, 2026

Around this home

Schools

Timber Point Elementary School

Public K-5 • Assigned • 0.4mi

6/10

Excelsior Middle School

Public 6-8 • Assigned • 2.8mi

4/10

Liberty High School

Public 9-12 • Assigned • 4.4mi

7/10

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

1/10 Fire Factor

Unlikely to be in a wildfire in next 30 years

6/10 Heat Factor

6 days above 102° expected this year, 13 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

9/10 Air Factor

20 unhealthy days expected this year, 21 days in 30 years

Provided by First Street

Historical weather

Discovery Bay, CA • 94514

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 12.6 hours in June and 4.7 hours in December, placing it above the U.S. average for solar exposure.

12.6 hrs

4.7 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$675,000 – $817,000

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Nearby similar homes

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New listings for sale in 94505

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Home values near 3404 Keystone Loop

Data from public records.

Address	Redfin Estimate
3405 Keystone Loop, Discovery Bay, CA 4 Beds \| 2.5 Baths \| 3030 Sq. Ft.	$842,511
3423 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 3517 Sq. Ft.	$816,938

Address	Redfin Estimate
3411 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| - Sq. Ft.	$794,463
3429 Keystone Loop, Discovery Bay, CA 6 Beds \| 4 Baths \| 4285 Sq. Ft.	$906,386

Address	Redfin Estimate
3417 Keystone Loop, Discovery Bay, CA 4 Beds \| 3 Baths \| 2562 Sq. Ft.	$744,732
3527 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4011 Sq. Ft.	$866,281

Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2011. 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 94505, CA

Sale history for 3404 Keystone Loop

Tax history for 3404 Keystone Loop

Public record

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 94505

Home values near 3404 Keystone Loop

More real estate resources