OFF MARKET

Off Market Aug 2009 for $290K

$725,245

Est. refi paymentEst. refi $2,300/mo

•

2,562

sq ft

3410 Keystone Loop, Discovery Bay, CA 94505

About this home

Single-familyProperty Type

2003Year Built

7,600 sq ftLot Size

$283Est. Price/Sq.Ft.

2 car garageParking

Listed by Nellie Andeel-madrid •DRE #00808122 • Century 21 MM

Bought with Adela Ramzi •DRE #01476270 • BETTER HOMES/MANN & ASSC

Redfin checked: 3 minutes ago

•Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #40385480

Redfin Estimate

$725,245

$435K since sold in August 2009$11K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 1.3% lower than the average sale price ($735K) of 6 comparable homes.

SOLD SEP 4, 2026
$745,000
A
4 beds3 baths2,704 sq ft
1525 Coleridge Way, Discovery Bay, CA 94505
SOLD JUN 18, 2026
$690,000
B
4 beds3 baths2,302 sq ft
2072 Bridgeport Loop, Discovery Bay, CA 94505
SOLD AUG 18, 2026
$680,000
C
4 beds2.5 baths2,613 sq ft
2466 Yosemite Way, Discovery Bay, CA 94505
SOLD JAN 8, 2026
$770,000
D
4 beds3 baths2,723 sq ft
5672 Arcadia Cir, Discovery Bay, CA 94505
SOLD DEC 19, 2025
$725,000
E
3 beds2.5 baths2,609 sq ft
2078 Bridgeport Loop, Discovery Bay, CA 94505
SOLD MAY 19, 2026
$800,000
F
4 beds3 baths2,913 sq ft
2350 Winchester Loop, Discovery Bay, CA 94505

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Earn from this home

Sell

$553,677

Est. take-home

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Refinance

Est. cash available

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Rent

$3,670/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

OPEN SAT, 1PM TO 4PM
$849,000
4 beds3 baths3,367 sq ft
453 Emerson Ct, Discovery Bay, CA 94505
OPEN SAT, 1PM TO 4PM
$979,000
4 beds3 baths2,263 sq ft
9133 Calypso Ct, Discovery Bay, CA 94505
Coldwell Banker Realty, Coldwell Banker Realty
COMING SOON
$799,000
3 beds2 baths2,168 sq ft
4681 Spinnaker Way, Discovery Bay, CA 94505
$818,000
4 beds2.5 baths2,340 sq ft
7295 Keyesport Way, Discovery Bay, CA 94505
COMING SOON
$835,000
3 beds2.5 baths2,330 sq ft
7364 Bay Harbor Way, Discovery Bay, CA 94505
OPEN SAT, 12PM TO 3:30PM
$745,000
4 beds3 baths2,432 sq ft
3694 Otter Brook Loop, Discovery Bay, CA 94505
$1,250,000
4 beds3 baths2,636 sq ft
4880 Discovery Pt, Discovery Bay, CA 94505
OPEN SAT, 1PM TO 3PM
$685,000
4 beds2.5 baths1,706 sq ft
3524 Sailboat Dr, Discovery Bay, CA 94505
$689,000
4 beds3 baths2,562 sq ft
6171 Seneca Cir, Discovery Bay, CA 94505
$682,500
4 beds2 baths1,760 sq ft
2419 Imperial Ct, Discovery Bay, CA 94505
See all

Provided by Redfin

Sale history for 3410 Keystone Loop

Year

Property tax

Land + Additions

Assessment*

2025

$6,211 (+5.9%)

$59,239 + $322,565

$381,804

2024

$5,867 (+1.6%)

$58,078 + $316,241

$374,319

2023

$5,774 (+1.7%)

$56,940 + $310,041

$366,981

2022

$5,677 (+2.4%)

$55,824 + $303,962

$359,786

2021

$5,546 (+0.6%)

$54,730 + $298,002

$352,732

2020

$5,512 (+1.4%)

$53,657 + $292,159

$345,816

2019

$5,436 (+4.1%)

$53,107 + $289,164

$342,271

2018

$5,220 (+2.4%)

$52,066 + $283,495

$335,561

2017

$5,099 (+6.3%)

$50,046 + $272,488

$322,534

2016

$4,798 (+3.3%)

$50,046 + $272,488

$322,534

2015

$4,644 (+2.0%)

$49,065 + $267,146

$316,211

2014

$4,553 (+8.6%)

$47,382 + $257,980

$305,362

2013

$4,191 (−2.6%)

$47,382 + $257,980

$305,362

2012

$4,302 (+10.6%)

$42,671 + $232,329

$275,000

2011

$3,891 (−7.5%)

$44,378 + $241,622

$286,000

2010

$4,206 (+2.3%)

$38,793 + $211,207

$250,000

2009

$4,111 (−26.1%)

$44,612 + $242,888

$287,500

2008

$5,559

$79,959 + $198,041

$278,000

Tax history for 3410 Keystone Loop

Year

Property tax

Land + Additions

Assessment*

2025

$6,211 (+5.9%)

$59,239 + $322,565

$381,804

2024

$5,867 (+1.6%)

$58,078 + $316,241

$374,319

2023

$5,774 (+1.7%)

$56,940 + $310,041

$366,981

2022

$5,677 (+2.4%)

$55,824 + $303,962

$359,786

2021

$5,546 (+0.6%)

$54,730 + $298,002

$352,732

2020

$5,512 (+1.4%)

$53,657 + $292,159

$345,816

2019

$5,436 (+4.1%)

$53,107 + $289,164

$342,271

2018

$5,220 (+2.4%)

$52,066 + $283,495

$335,561

2017

$5,099 (+6.3%)

$50,046 + $272,488

$322,534

2016

$4,798 (+3.3%)

$50,046 + $272,488

$322,534

2015

$4,644 (+2.0%)

$49,065 + $267,146

$316,211

2014

$4,553 (+8.6%)

$47,382 + $257,980

$305,362

2013

$4,191 (−2.6%)

$47,382 + $257,980

$305,362

2012

$4,302 (+10.6%)

$42,671 + $232,329

$275,000

2011

$3,891 (−7.5%)

$44,378 + $241,622

$286,000

2010

$4,206 (+2.3%)

$38,793 + $211,207

$250,000

2009

$4,111 (−26.1%)

$44,612 + $242,888

$287,500

2008

$5,559

$79,959 + $198,041

$278,000

*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

7,600 Sq. Ft.

Year renovated

2003

Sq. Ft.

2,562

Year built

2003

Style

Single Family Residential

County

Contra Costa County

APN

0114210438

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

Feb 7, 2023 • Final

Building - residential mechanical

Remove and replace a condenser and indoor coil in the side yard. Remove and replace a furnace in the attic.

HVAC

Feb 20, 2003 • Final

Building/residential/r/new single family-duplex

Construct a new single-family home based on plan number two.

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, Int Access From Garage, Off Street, Secured, Side Yard Access, Guest, Enclosed, Garage Door Opener

Interior

Bathroom Information
# of Bathrooms Total: 3
# of Bathrooms Full: 3
Other Bathrooms Included Features: Shower Over Tub, Solid Surface, Updated Baths
Primary Bathroom Included Features: Solid Surface, Stall Shower, Tub with Jets, Updated Baths

Interior Features
Interior Features: Dining Area, Family Room, Formal Dining Room, Kitchen/Family Combo, Breakfast Bar, Breakfast Nook, Counter - Solid Surface, Kitchen Island, Pantry, Updated Kitchen
Appliances: Dishwasher, Double Oven, Disposal, Gas Range, Plumbed For Ice Maker, Microwave, Oven, Self Cleaning Oven, Gas Water Heater
Laundry Features: 220 Volt Outlet, Hookups Only, Laundry Room, In Unit
Street Level Features: 4 Bedrooms, 3 Baths, Primary Bedrm Suite - 1, Laundry Facility, Main Entry
Window Features: Double Pane Windows
Fireplaces Total: 1
Has Fireplace
Flooring: Concrete, Laminate, Vinyl, Carpet

Room Information
Kitchen Features: Breakfast Bar,Breakfast Nook,Counter - Solid Surface,Dishwasher,Double Oven,Garbage Disposal,Gas Range/Cooktop,Ice Maker Hookup,Island,Microwave,Oven Built-in,Pantry,Self-Cleaning Oven,Updated Kitchen
Rooms Total: 8
Fireplace Features: Family Room, Gas, Gas Starter, Raised Hearth, Wood Burning

Exterior

Building Information
Construction Materials: Brick, Stucco
Building Area Total: 2,562
Builder Name: Hoffman Co.

Exterior Features
Patio And Porch Features: Patio, Covered
Exterior Features: Back Yard, Front Yard, Sprinklers Automatic, Sprinklers Back, Sprinklers Front, Sprinklers Side
Door Features: Mirrored Closet Door(s)
Fencing: Fenced

Mobile Home Information
Model: Catalina

Pool Information
Pool Features: Gas Heat, Gunite, In Ground, Community

Property Information
Living Area: 2562
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 2003

Lot Information
Lot Size Square Feet: 7600
Lot Size Area: 0.17
Lot Size Units: Acres
Lot Size Acres: 0.17
Lot Features: Level, Premium Lot
Waterfront
Waterfront Features: Lake Front
Zoning: Res

Utilities

Utility Information
Water Source: Public
Sewer: Public Sewer

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

Location

Homeowners Association Information
Pets Allowed: Yes
Has Association
Association Amenities: Greenbelt, Playground, Pool, Gated
Association Name: LAKESHORE HOA
Association Fee: $165
Association Fee Includes: Common Area Maint, Management Fee, Reserves, Security/Gate Fee, Water/Sewer
Association Fee Frequency: Monthly
HOA Transfer Fees: Paid by Seller

School Information
High School District: Byron (925) 634-6644

Public facts

Beds: 4
Baths: 3.0
Sq. Ft.: 2,562
Stories: 1.0
Lot Size: 7,600 square feet
Style: Single Family Residential
Year Built: 2003
Year Renovated: 2003
County: Contra Costa County
APN: 0114210438

Home facts updated by county records on Jul 13, 2026

Around this home

Schools

Timber Point Elementary School

Public K-5 • Assigned • 0.5mi

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

2/10 Fire Factor

0.00% chance of being 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 • 94505

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

$689,000 – $835,000

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Home values near 3410 Keystone Loop

Data from public records.

Address	Redfin Estimate
3405 Keystone Loop, Discovery Bay, CA 4 Beds \| 2.5 Baths \| 3030 Sq. Ft.	$819,086
3423 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 3517 Sq. Ft.	$815,482

Address	Redfin Estimate
3411 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| - Sq. Ft.	$790,199
3429 Keystone Loop, Discovery Bay, CA 6 Beds \| 4 Baths \| 4285 Sq. Ft.	$923,012

Address	Redfin Estimate
3417 Keystone Loop, Discovery Bay, CA 4 Beds \| 3 Baths \| 2562 Sq. Ft.	$747,928
3435 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4011 Sq. Ft.	$853,496

Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2008. 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 3410 Keystone Loop

Tax history for 3410 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 3410 Keystone Loop

More real estate resources