OFF MARKET

Off Market May 2019 for $580K

$798,597

Est. refi paymentEst. refi $4,384/mo

•

3,517

sq ft

3423 Keystone Loop, Discovery Bay, CA 94505

About this home

Step Inside this Amazing Home Within the Highly Desirable Lakeshore Guard-Gated Community and You Will Appreciate the Pride Taken from Top to Bottom in this Wonderful Family Home! Enjoy the Welcoming Front Porch Area as it Leads You to the Foyer and Living Room with Soaring Ceilings. This Magnificent Home Boasts 3,517 sqft. which includes 5 Bedrooms + 4 Baths (1 Generously Sized Bedroom & Full Bath Downstairs) + Loft/Office and Highly Sought after 3 Car Garage! Experience the Roomy Open-Concept Floor Plan with Vaulted Ceilings and an Updated Kitchen that Leads you Right into the Family Room with Cozy Fireplace. Enjoy the Peaceful Atmosphere of the Generously-Sized Lot at 7,000 sqft which Includes Professionally Designed English-Style Gardens & Shade Feature Accenting the Rear Patio. *Bonus Features: Community Pool, Basketball Court, Walking Trails Surrounding Beautiful Fountains & Lakes, Picnic Areas & Exercise Stations for Those Health Aficionados! Call for a Private Viewing TODAY!!

Single-familyProperty Type

2003Year Built

7,000 sq ftLot Size

$227Est. Price/Sq.Ft.

3 car garageParking

Listed by Randy Prince •DRE #01234036 • Corcoran Icon Properties

Listed by Megen Marshall •DRE #01958837 • Corcoran Icon Properties

Bought with Andrew Lomano •DRE #01729968 • Living Estates Realty

Redfin checked: 2 minutes ago

•Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #40859086

Redfin Estimate

$798,597

$219K since sold in May 2019$24K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 4.2% higher than the average sale price ($766K) of 6 comparable homes.

SOLD JUL 20, 2026
$849,900
A
6 beds4 baths4,088 sq ft
3438 Keystone Loop, Discovery Bay, CA 94505
SOLD BY REDFIN APR 14, 2026
$818,000
B
5 beds4 baths4,011 sq ft
3432 Keystone Loop, Discovery Bay, CA 94505
BOUGHT WITH REDFIN JUN 15, 2026
$740,000
C
4 beds3.5 baths3,097 sq ft
327 Mendocino Way, Discovery Bay, CA 94505
Iron Valley Real Estate NorCal, Iron Valley Real Estate NorCal
SOLD APR 30, 2026
$750,000
D
4 beds3 baths3,517 sq ft
716 Seminole Ct, Discovery Bay, CA 94505
SOLD NOV 20, 2025
$750,000
E
5 beds3 baths3,536 sq ft
3645 Otter Brook Loop, Discovery Bay, CA 94505
SOLD JUN 18, 2026
$690,000
F
4 beds3 baths2,302 sq ft
2072 Bridgeport Loop, Discovery Bay, CA 94505

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Earn from this home

Sell

$361,230

Est. take-home

List your home with Redfin and save $3,993

Refinance

Est. cash available

Get cash now or lower your monthly rate

Rent

$4,025/mo

Redfin rental estimate

List your home for rent

Market trends in 94505, CA

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

98.3%

+0.3% MoM

Median sale price

$799K

$35K MoM

Avg. days on market

27d

9 days MoM

Recently sold homes

6 MoM

New listings for sale

COMING SOON
$685,000
4 beds2.5 baths1,706 sq ft
3524 Sailboat Dr, Discovery Bay, CA 94505
REDFIN COMING SOON
$849,000
4 beds3 baths2,455 sq ft
1280 Saint Andrews Dr, Discovery Bay, CA 94505
OPEN SAT, 1PM TO 4PM
$799,000
4 beds3 baths2,762 sq ft
2353 Wayfarer Dr, Discovery Bay, CA 94505
COMING SOON
$1,100,000
5 beds3 baths2,779 sq ft
124 Tennyson Ct, Discovery Bay, CA 94505
OPEN SAT, 12PM TO 3PM
$1,075,000
4 beds2.5 baths2,493 sq ft
1650 Riverlake Rd, Discovery Bay, CA 94505
$3,200,000
7 beds8 baths7,424 sq ft
2200 Sunset Pt, Discovery Bay, CA 94513
$785,000
3 beds2 baths1,868 sq ft
2244 Colonial Ct, Discovery Bay, CA 94505
$1,699,000
4 beds2.5 baths2,773 sq ft
4818 Cabrillo Pt, Discovery Bay, CA 94505
$1,359,900
4 beds3.5 baths4,271 sq ft
1917 Windward Pt, Discovery Bay, CA 94505
Portfolio Real Estate, Portfolio Real Estate
OPEN SAT, 2:30PM TO 5PM
$1,399,000
4 beds2.5 baths2,707 sq ft
4450 Driftwood Ct, Discovery Bay, CA 94505
See all

Provided by Redfin

Sale history for 3423 Keystone Loop

Year

Property tax

Land + Additions

Assessment*

2025

$9,277 (+5.0%)

$159,294 + $500,642

$659,936

2024

$8,834 (+1.6%)

$156,171 + $490,826

$646,997

2023

$8,699 (+1.7%)

$153,109 + $481,202

$634,311

2022

$8,557 (+2.4%)

$150,107 + $471,767

$621,874

2021

$8,356 (+0.4%)

$147,164 + $462,517

$609,681

2020

$8,321 (+3.0%)

$144,279 + $453,449

$597,728

2019

$8,077 (+2.4%)

$142,800 + $448,800

$591,600

2018

$7,889 (+2.4%)

$149,508 + $424,492

$574,000

2017

$7,704 (+10.3%)

$145,992 + $414,508

$560,500

2016

$6,986 (+13.8%)

$145,992 + $414,508

$560,500

2015

$6,141 (+0.5%)

$135,443 + $384,557

$520,000

2014

$6,112 (+12.6%)

$116,820 + $331,680

$448,500

2013

$5,426 (+12.1%)

$116,820 + $331,680

$448,500

2012

$4,839 (+4.9%)

$101,062 + $286,938

$388,000

2011

$4,611 (+2.2%)

$87,257 + $247,743

$335,000

2010

$4,513 (+1.5%)

$82,179 + $233,321

$315,500

2009

$4,446 (−23.7%)

$82,179 + $233,321

$315,500

2008

$5,823

$82,179 + $233,321

$315,500

Tax history for 3423 Keystone Loop

Year

Property tax

Land + Additions

Assessment*

2025

$9,277 (+5.0%)

$159,294 + $500,642

$659,936

2024

$8,834 (+1.6%)

$156,171 + $490,826

$646,997

2023

$8,699 (+1.7%)

$153,109 + $481,202

$634,311

2022

$8,557 (+2.4%)

$150,107 + $471,767

$621,874

2021

$8,356 (+0.4%)

$147,164 + $462,517

$609,681

2020

$8,321 (+3.0%)

$144,279 + $453,449

$597,728

2019

$8,077 (+2.4%)

$142,800 + $448,800

$591,600

2018

$7,889 (+2.4%)

$149,508 + $424,492

$574,000

2017

$7,704 (+10.3%)

$145,992 + $414,508

$560,500

2016

$6,986 (+13.8%)

$145,992 + $414,508

$560,500

2015

$6,141 (+0.5%)

$135,443 + $384,557

$520,000

2014

$6,112 (+12.6%)

$116,820 + $331,680

$448,500

2013

$5,426 (+12.1%)

$116,820 + $331,680

$448,500

2012

$4,839 (+4.9%)

$101,062 + $286,938

$388,000

2011

$4,611 (+2.2%)

$87,257 + $247,743

$335,000

2010

$4,513 (+1.5%)

$82,179 + $233,321

$315,500

2009

$4,446 (−23.7%)

$82,179 + $233,321

$315,500

2008

$5,823

$82,179 + $233,321

$315,500

*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

7,000 Sq. Ft.

Year renovated

2003

Sq. Ft.

3,517

Year built

2003

Style

Single Family Residential

County

Contra Costa County

APN

0114210040

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

Property details

Parking

Parking Information
Has Attached Garage
Garage Spaces: 3
Covered Spaces: 3
Parking Features: Attached, Int Access From Garage, Garage Door Opener

Interior

Virtual Tour

Bathroom Information
# of Bathrooms Total: 4
# of Bathrooms Full: 4

Interior Features
Interior Features: Bonus/Plus Room, Dining Area, Family Room, Formal Dining Room, Kitchen/Family Combo, Breakfast Bar, Breakfast Nook, Stone Counters, Eat-in Kitchen
Appliances: Dishwasher, Gas Range, Microwave, Oven
Laundry Features: Hookups Only, Laundry Room
Upper Level Features: 4 Bedrooms, 3 Baths, Primary Bedrm Suite - 1, Loft
Street Level Features: 1 Bedroom, 1 Bath, Laundry Facility, Main Entry
Window Features: Double Pane Windows
Fireplaces Total: 1
Has Fireplace
Flooring: Tile, Carpet

Room Information
Kitchen Features: Breakfast Bar,Breakfast Nook,Counter - Stone,Dishwasher,Eat In Kitchen,Gas Range/Cooktop,Microwave,Oven Built-in
Rooms Total: 11
Fireplace Features: Family Room, Gas Starter

Exterior

Building Information
Construction Materials: Brick, Stucco
Building Area Total: 3,517
Foundation Details: Slab

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

Property Information
Living Area: 3517
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 2003

Lot Information
Lot Size Square Feet: 7000
Lot Size Area: 0.16
Lot Size Units: Acres
Lot Size Acres: 0.16
Lot Features: Regular

Utilities

Utility Information
Water Source: Public
Sewer: Public Sewer

Heating & Cooling
Has Heating
Heating: Zoned, Natural Gas
Cooling: Zoned

Location

Homeowners Association Information
Has Association
Association Amenities: Greenbelt, Pool, Gated
Association Name: LAKESHORE HOA
Association Fee: $183
Association Fee Includes: Common Area Maint, Management Fee, Security/Gate Fee
Association Fee Frequency: Monthly

Public facts

Beds: 5
Baths: 4.0
Sq. Ft.: 3,517
Stories: 2.0
Lot Size: 7,000 square feet
Style: Single Family Residential
Year Built: 2003
Year Renovated: 2003
County: Contra Costa County
APN: 0114210040

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 • 4.5mi

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

7 days above 102° expected this year, 15 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

$759,000 – $919,000

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Nearby similar homes

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Loanstar Mortgage

New listings for sale in 94505

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REDFIN COMING SOON

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OPEN SAT, 1PM TO 4PM

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COMING SOON

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OPEN SAT, 12PM TO 3PM

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Portfolio Real Estate, Portfolio Real Estate

Home values near 3423 Keystone Loop

Data from public records.

Address	Redfin Estimate
3405 Keystone Loop, Discovery Bay, CA 4 Beds \| 2.5 Baths \| 3030 Sq. Ft.	$801,656
3429 Keystone Loop, Discovery Bay, CA 6 Beds \| 4 Baths \| 4285 Sq. Ft.	$894,439

Address	Redfin Estimate
3411 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| - Sq. Ft.	$781,356
3435 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4011 Sq. Ft.	$836,796

Address	Redfin Estimate
3417 Keystone Loop, Discovery Bay, CA 4 Beds \| 3 Baths \| 2562 Sq. Ft.	$738,106
3441 Keystone Loop, Discovery Bay, CA 4 Beds \| 2 Baths \| 2033 Sq. Ft.	$731,388

Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2019. 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 3423 Keystone Loop

Tax history for 3423 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 3423 Keystone Loop

More real estate resources