3545 Keystone Loop, Discovery Bay, CA 94505

Off Market Oct 2015 for $510K

$797,941

Est. refi paymentEst. refi $3,084/mo

•

3,517

sq ft

3545 Keystone Loop, Discovery Bay, CA 94505

About this home

Single-familyProperty Type

2003Year Built

6,500 sq ftLot Size

$227Est. Price/Sq.Ft.

3 car garageParking

Bought with John Diaz •DRE #01335900 • U Realty Team

Redfin checked: 2 minutes ago

•Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #40689600

Redfin Estimate

$797,941

$288K since sold in October 2015$22K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 2.6% higher than the average sale price ($778K) of 6 comparable homes.

SOLD APR 30, 2026
$750,000
A
4 beds3 baths3,517 sq ft
716 Seminole Ct, 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 MAY 19, 2026
$800,000
C
4 beds3 baths2,913 sq ft
2350 Winchester Loop, Discovery Bay, CA 94505
SOLD NOV 20, 2025
$750,000
D
5 beds3 baths3,536 sq ft
3645 Otter Brook Loop, Discovery Bay, CA 94505
SOLD DEC 1, 2025
$850,000
E
4 beds3 baths3,272 sq ft
3638 Otter Brook Loop, Discovery Bay, CA 94505
SOLD DEC 23, 2025
$827,000
F
5 beds3 baths3,435 sq ft
3627 Otter Brook Loop, Discovery Bay, CA 94505

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Earn from this home

Sell

$444,608

Est. take-home

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Refinance

Est. cash available

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Rent

$3,891/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

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

REDFIN COMING SOON
1280 Saint Andrews Dr, Discovery Bay, CA 94505
$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
$1,399,000
4 beds2.5 baths2,707 sq ft
4450 Driftwood Ct, Discovery Bay, CA 94505
OPEN SAT, 1:30PM TO 4:30PM
$589,000
3 beds2.5 baths2,042 sq ft
3713 Yacht Dr, Discovery Bay, CA 94505
See all

Provided by Redfin

Sale history for 3545 Keystone Loop

Date

Event

Price

bridgeMLS, Bay East AOR, or Contra Costa AOR #40689600

Nov 10, 2015

Sold

$510,000

$145/sq ft

Sep 30, 2015

Pending

—

Jul 23, 2015

Relisted

—

Jul 7, 2015

Pending

—

May 26, 2015

Pending

—

May 15, 2015

Relisted

—

May 5, 2015

Listing Removed

—

Mar 6, 2015

Listed

$510,000

$145/sq ft

MLSListings #ML81453931

Sep 30, 2015

Pending

—

Jul 23, 2015

Relisted

—

Jul 8, 2015

Pending

—

May 26, 2015

Contingent

—

May 15, 2015

Relisted

—

May 5, 2015

Listing Removed

—

Mar 6, 2015

Listed

$510,000

$145/sq ft

bridgeMLS, Bay East AOR, or Contra Costa AOR #40683531

Feb 19, 2015

Sold

$395,000

$112/sq ft

Jan 16, 2015

Pending

—

Jan 8, 2015

Listed

$477,000

$136/sq ft

bridgeMLS, Bay East AOR, or Contra Costa AOR #40676681

Jan 8, 2015

Listing Removed

—

Oct 7, 2014

Listed

Public Records

Oct 29, 1998

Sold

$2,583,227

$734/sq ft

Join or sign in to view all info

Year

Property tax

Land + Additions

Assessment*

2025

$8,726 (+5.1%)

$120,744 + $495,060

$615,804

2024

$8,300 (+1.6%)

$118,377 + $485,353

$603,730

2023

$8,170 (+1.7%)

$116,056 + $475,837

$591,893

2022

$8,035 (+2.4%)

$113,781 + $466,507

$580,288

2021

$7,846 (+0.5%)

$111,550 + $457,360

$568,910

2020

$7,811 (+1.2%)

$109,363 + $448,393

$557,756

2019

$7,714 (+4.0%)

$108,242 + $443,796

$552,038

2018

$7,416 (+2.1%)

$106,120 + $435,095

$541,215

2017

$7,263 (+5.6%)

$102,000 + $418,200

$520,200

2016

$6,879 (+7.2%)

$102,000 + $418,200

$520,200

2015

$6,418 (+5.4%)

$100,000 + $410,000

$510,000

2014

$6,090 (+12.9%)

$95,845 + $343,655

$439,500

2013

$5,393 (+12.2%)

$95,845 + $343,655

$439,500

2012

$4,806 (+4.2%)

$82,434 + $295,566

$378,000

2011

$4,611 (−0.7%)

$70,876 + $254,124

$325,000

2010

$4,645 (+0.5%)

$67,277 + $241,223

$308,500

2009

$4,622 (−18.1%)

$69,894 + $250,606

$320,500

2008

$5,645

$70,767 + $253,733

$324,500

Tax history for 3545 Keystone Loop

Year

Property tax

Land + Additions

Assessment*

2025

$8,726 (+5.1%)

$120,744 + $495,060

$615,804

2024

$8,300 (+1.6%)

$118,377 + $485,353

$603,730

2023

$8,170 (+1.7%)

$116,056 + $475,837

$591,893

2022

$8,035 (+2.4%)

$113,781 + $466,507

$580,288

2021

$7,846 (+0.5%)

$111,550 + $457,360

$568,910

2020

$7,811 (+1.2%)

$109,363 + $448,393

$557,756

2019

$7,714 (+4.0%)

$108,242 + $443,796

$552,038

2018

$7,416 (+2.1%)

$106,120 + $435,095

$541,215

2017

$7,263 (+5.6%)

$102,000 + $418,200

$520,200

2016

$6,879 (+7.2%)

$102,000 + $418,200

$520,200

2015

$6,418 (+5.4%)

$100,000 + $410,000

$510,000

2014

$6,090 (+12.9%)

$95,845 + $343,655

$439,500

2013

$5,393 (+12.2%)

$95,845 + $343,655

$439,500

2012

$4,806 (+4.2%)

$82,434 + $295,566

$378,000

2011

$4,611 (−0.7%)

$70,876 + $254,124

$325,000

2010

$4,645 (+0.5%)

$67,277 + $241,223

$308,500

2009

$4,622 (−18.1%)

$69,894 + $250,606

$320,500

2008

$5,645

$70,767 + $253,733

$324,500

*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

6,500 Sq. Ft.

Year renovated

2004

Sq. Ft.

3,517

Year built

2003

Style

Single Family Residential

County

Contra Costa County

APN

0114210248

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

Aug 7, 2019 • Final

Building - residential solar photovoltaic

Install a roof-mounted solar photovoltaic system on a residential building.

Electrical

Solar

Oct 9, 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: 3
Covered Spaces: 3
Parking Features: Attached

Interior

Virtual Tour

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

Interior Features
Interior Features: Family Room, Formal Dining Room, Tile Counters, Kitchen Island
Appliances: Dishwasher, Disposal, Gas Range, Microwave, Oven, Gas Water Heater
Laundry Features: 220 Volt Outlet, Gas Dryer Hookup, Laundry Room
Upper Level Features: 2 Bedrooms, 1 Bath, Primary Bedrm Suite - 1, Loft
Street Level Features: 1 Bedroom, 1 Bath
Window Features: Window Coverings
Fireplaces Total: 1
Has Fireplace
Flooring: Linoleum, Tile, Carpet

Room Information
Kitchen Features: Counter - Tile,Dishwasher,Garbage Disposal,Gas Range/Cooktop,Island,Microwave,Oven Built-in
Rooms Total: 10
Fireplace Features: Family Room, Gas

Exterior

Building Information
Construction Materials: Stucco
Building Area Total: 3,517

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

Pool Information
Pool Features: In Ground, Community

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

Lot Information
Other Structures: Shed(s)
Lot Size Square Feet: 6500
Lot Size Area: 0.1492
Lot Size Units: Acres
Lot Size Acres: 0.1492
Lot Features: Level
Zoning: 1003

Utilities

Utility Information
Water Source: Public
Sewer: Public Sewer

Heating & Cooling
Has Heating
Heating: Zoned, Natural Gas
Cooling: Ceiling Fan(s), Zoned

Location

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

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

Public facts

Beds: 4
Baths: 3.0
Sq. Ft.: 3,517
Stories: 2.0
Lot Size: 6,500 square feet
Style: Single Family Residential
Year Built: 2003
Year Renovated: 2004
County: Contra Costa County
APN: 0114210248

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 • 2.7mi

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, 14 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 – $918,000

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COMING SOON

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OPEN SAT, 12PM TO 3PM

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Home values near 3545 Keystone Loop

Data from public records.

Address	Redfin Estimate
3521 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4088 Sq. Ft.	$847,343
3539 Keystone Loop, Discovery Bay, CA 4 Beds \| 2 Baths \| 2033 Sq. Ft.	$701,222

Address	Redfin Estimate
3527 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4011 Sq. Ft.	$863,078
3551 Keystone Loop, Discovery Bay, CA 4 Beds \| 2.5 Baths \| 3030 Sq. Ft.	$742,903

Address	Redfin Estimate
3533 Keystone Loop, Discovery Bay, CA 5 Beds \| 3 Baths \| 2562 Sq. Ft.	$757,998
3557 Keystone Loop, Discovery Bay, CA 4 Beds \| 4 Baths \| 4088 Sq. Ft.	$902,052

Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2015. 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 3545 Keystone Loop

Tax history for 3545 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 3545 Keystone Loop

More real estate resources