OFF MARKET

Off Market Sep 2023 for $799K

$823,463

Est. refi paymentEst. refi $5,214/mo

•

3,518

sq ft

3515 Keystone Loop, Discovery Bay, CA 94505

About this home

Expansive residence illuminated with natural light, showcasing an airy open floorplan designed for generous living. Boasting an elegant formal living and dining space, a harmonious family/kitchen fusion, and an immensely spacious bonus room/home office replete with double doors, a full bath, and a convenient laundry room - all conveniently situated on the main level. The kitchen exudes sophistication with its granite countertops, stainless steel appliances, a 5-burner gas stovetop, an inviting island, and ample storage for culinary essentials. Ascending to the second floor, you'll discover a vast loft area, 2 bedrooms interconnected with a tasteful jack and jill arrangement complemented by a shared full bath, an additional single bedroom, another full bath, and the luxurious owner's suite. The well-appointed owner's suite boasts considerable dimensions, highlighted by an expansive walk-in closet. The ensuite bathroom is a retreat within itself, featuring a stall shower, dual vanities, and a relaxing jacuzzi tub. Experience the enhanced comfort of new carpets throughout and an interior adorned with fresh paint. Accommodate your vehicles and recreational items effortlessly with the inclusion of a three-car garage and convenient side yard access, perfect for RV or watercraft!

Single-familyProperty Type

2003Year Built

6,500 sq ftLot Size

$234Est. Price/Sq.Ft.

3 spacesParking

Listed by Kenix Zhong •DRE #DRE #02026389 • RE/MAX Accord

•415-806-6251 (agent)

•kenix.zhong@gmail.com (agent)

•925-838-4100 (broker)

Bought with Brian Spears •DRE #01489951 • 1st Chois Fine Homes

•209-543-1113 (broker)

Redfin checked: a minute ago

•Source:San Francisco MLS #423760985

Redfin Estimate

$823,463

$24K since sold in September 2023$3,000 since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 12.5% higher than the average sale price ($732K) 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 AUG 18, 2026
$680,000
D
4 beds2.5 baths2,613 sq ft
2466 Yosemite Way, Discovery Bay, CA 94505
BOUGHT WITH REDFIN JUN 15, 2026
$740,000
E
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 MAR 5, 2026
$730,000
F
4 beds3 baths2,913 sq ft
2342 Winchester Loop, Discovery Bay, CA 94505

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Earn from this home

Sell

$175,808

Est. take-home

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Refinance

Est. cash available

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Rent

$4,155/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, 12PM TO 3PM
$745,000
4 beds3 baths2,432 sq ft
3694 Otter Brook Loop, Discovery Bay, CA 94505
NEW 3 HRS AGO
$1,250,000
4 beds3 baths2,636 sq ft
4880 Discovery Pt, Discovery Bay, CA 94505
OPEN SAT, 1PM TO 3PM
$699,999
2 beds2 baths1,370 sq ft
825 Discovery Bay Blvd, Discovery Bay, CA 94505
OPEN SAT, 1PM TO 4PM
$685,000
4 beds2.5 baths1,706 sq ft
3524 Sailboat Dr, Discovery Bay, CA 94505
NEW 24 HRS AGO
$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
$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
OPEN SAT, 12PM TO 2PM
$549,999
4 beds2.5 baths1,782 sq ft
4108 Regatta Dr, Discovery Bay, CA 94505
See all

Provided by Redfin

Redfin agents who toured

The masters has a walk-in shower and closet and there’s also a tub. There’s also a loft upstairs. There’s vaulted ceilings. The kitchen has granite countertops, an island, gas range and stainless appliances.
3 years ago• May not reflect the current state of the home
Terry Kreuz
Redfin Associate agent

Sale history for 3515 Keystone Loop

Year

Property tax

Land + Additions

Assessment*

2025

$11,119 (+4.7%)

$208,080 + $623,199

$831,279

2024

$10,616 (+2.4%)

$204,000 + $610,980

$814,980

2023

$10,364 (+1.7%)

$200,000 + $599,000

$799,000

2022

$10,196 (+66.3%)

$156,060 + $619,038

$775,098

2021

$6,129 (+0.6%)

$153,000 + $606,900

$759,900

2020

$6,096 (+1.3%)

$53,529 + $339,057

$392,586

2019

$6,017 (+4.1%)

$52,981 + $335,581

$388,562

2018

$5,781 (+2.3%)

$51,943 + $329,001

$380,944

2017

$5,653 (+6.0%)

$49,927 + $316,226

$366,153

2016

$5,333 (+3.0%)

$49,927 + $316,226

$366,153

2015

$5,177 (+1.9%)

$48,949 + $310,026

$358,975

2014

$5,079 (+0.9%)

$47,270 + $299,389

$346,659

2013

$5,033 (+2.5%)

$47,270 + $299,389

$346,659

2012

$4,910 (+4.1%)

$47,057 + $298,036

$345,093

2011

$4,715 (+0.9%)

$45,613 + $288,887

$334,500

2010

$4,672 (+7.3%)

$43,364 + $274,636

$318,000

2009

$4,353 (−26.1%)

$44,045 + $278,955

$323,000

2008

$5,888

$65,000 + $235,000

$300,000

Tax history for 3515 Keystone Loop

Year

Property tax

Land + Additions

Assessment*

2025

$11,119 (+4.7%)

$208,080 + $623,199

$831,279

2024

$10,616 (+2.4%)

$204,000 + $610,980

$814,980

2023

$10,364 (+1.7%)

$200,000 + $599,000

$799,000

2022

$10,196 (+66.3%)

$156,060 + $619,038

$775,098

2021

$6,129 (+0.6%)

$153,000 + $606,900

$759,900

2020

$6,096 (+1.3%)

$53,529 + $339,057

$392,586

2019

$6,017 (+4.1%)

$52,981 + $335,581

$388,562

2018

$5,781 (+2.3%)

$51,943 + $329,001

$380,944

2017

$5,653 (+6.0%)

$49,927 + $316,226

$366,153

2016

$5,333 (+3.0%)

$49,927 + $316,226

$366,153

2015

$5,177 (+1.9%)

$48,949 + $310,026

$358,975

2014

$5,079 (+0.9%)

$47,270 + $299,389

$346,659

2013

$5,033 (+2.5%)

$47,270 + $299,389

$346,659

2012

$4,910 (+4.1%)

$47,057 + $298,036

$345,093

2011

$4,715 (+0.9%)

$45,613 + $288,887

$334,500

2010

$4,672 (+7.3%)

$43,364 + $274,636

$318,000

2009

$4,353 (−26.1%)

$44,045 + $278,955

$323,000

2008

$5,888

$65,000 + $235,000

$300,000

*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

6,500 Sq. Ft.

Year renovated

2004

Sq. Ft.

3,518

Year built

2003

Style

Single Family Residential

County

Contra Costa County

APN

0114210198

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

Jul 25, 2023 • Final

Building/residential/al/alteration

Repair drywall, replace flooring, and paint the interior. Remove unpermitted electrical and plumbing systems, including two water tanks. No structural work is included.

Remodel

Aug 30, 2017 • Final

Building - residential plumbing

Install excess flow safety valves and a seismic valve.

Gas

Plumbing

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

Garage Information
Has Garage

Parking Information
Parking Features: Driveway, Garage Door Opener, Side By Side, On Site (Single Family Only)
# of Parking Total: 3
Has Open Parking

Interior

Virtual Tour Information

Bedrooms Information
# of Bedrooms: 4

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

Interior Features
Has Heating
Heating: Central
Flooring: Carpet, Tile
Appliances: Dishwasher, Microwave

Exterior

Exterior Features
Entry Level: 0
Fencing: Back Yard

Building Information
Living Area: 3518
Living Area Units: Square Feet
Living Area Source: Assessor Auto-Fill
Building Area Total: 3518
Building Area Units: Square Feet
Building Area Source: Assessor Auto-Fill
Year Built: 2003
Year Built Source: Assessor Auto-Fill
Roof: Tile
Foundation Details: Slab

Mobile Home Information
Mobile Dim Units: Feet

Property Type
Property Type: Residential
Property SubType: Single Family Residence

Property Information
Security Features: Carbon Monoxide Detector(s), Security Gate

Lot Information
Lot Size Sq. Ft.: 6500
Lot Size Acres: 0.1492
Lot Size Area: 6500
Lot Size Units: SqFt
Lot Size Units: Square Feet
Elevation: 0
Elevation Units: Feet

Utilities

Utility Information
Sewer: Public Sewer
Water Source: Public

Location

HOA Information
Has Homeowners Association
Association Fee: 230
Association Fee Frequency: Monthly
Association Fee Includes: Common Areas, Recreation Facility
Association Amenities: Dog Park, Exercise Course, Park, Playground, Pool, Tennis Court(s), Trail(s)

Public facts

Beds: 4
Baths: 4.0
Sq. Ft.: 3,518
Stories: 2.0
Lot Size: 6,500 square feet
Style: Single Family Residential
Year Built: 2003
Year Renovated: 2004
County: Contra Costa County
APN: 0114210198

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 • 4.5mi

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

$783,000 – $947,000

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Nearby similar homes

NEW 24 HRS AGO

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PMZ Real Estate, PMZ Real Estate

New listings for sale in 94505

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NEW 3 HRS AGO

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OPEN SAT, 1PM TO 3PM

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OPEN SAT, 1PM TO 4PM

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3524 Sailboat Dr, Discovery Bay, CA 94505

NEW 24 HRS AGO

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6171 Seneca Cir, Discovery Bay, CA 94505

$682,500

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$689,000

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LISTED BY REDFIN3D WALKTHROUGH

$849,000

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OPEN SUN, 12PM TO 2PM

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Home values near 3515 Keystone Loop

Data from public records.

Address	Redfin Estimate
3495 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4011 Sq. Ft.	$963,857
3521 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4088 Sq. Ft.	$855,199

Address	Redfin Estimate
3501 Keystone Loop, Discovery Bay, CA 3 Beds \| 3 Baths \| 2562 Sq. Ft.	$744,873
3527 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4011 Sq. Ft.	$866,281

Address	Redfin Estimate
3507 Keystone Loop, Discovery Bay, CA 4 Beds \| 2.5 Baths \| 3030 Sq. Ft.	$801,284
3533 Keystone Loop, Discovery Bay, CA 5 Beds \| 3 Baths \| 2562 Sq. Ft.	$781,617

Property information provided by San Francisco MLS when last listed in 2023. 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

Redfin agents who toured

Sale history for 3515 Keystone Loop

Tax history for 3515 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 3515 Keystone Loop

More real estate resources