3507 Keystone Loop, Discovery Bay, CA 94505

Off market oct 2025 for $725K

$780,953

Est. refi paymentEst. refi $5,672/mo

•

3,030

sq ft

3507 Keystone Loop, Discovery Bay, CA 94505

About this home

Single-familyProperty Type

2003Year Built

6,500 sq ftLot Size

2 car garageParking

Listed by Bela Shah •DRE #01100225 • Bela Realty & Inv

Bought with Diane Huezo •DRE #01993321 • Alliance Bay Realty

Redfin checked: 2 minutes ago

•Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #41107697

Redfin Estimate

$780,953

$56K since sold in October 2025$22K since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 9.4% lower than the average sale price ($862K) of 6 comparable homes.

SOLD AUG 18, 2026
$680,000
A
4 beds2.5 baths2,613 sq ft
2466 Yosemite Way, Discovery Bay, CA 94505
SOLD MAY 19, 2026
$800,000
B
4 beds3 baths2,913 sq ft
2350 Winchester Loop, Discovery Bay, CA 94505
SOLD OCT 15, 2026
$1,450,000
C
4 beds3 baths2,902 sq ft
4775 Discovery Pt, Discovery Bay, CA 94505
SOLD JUN 18, 2026
$690,000
D
4 beds3 baths2,302 sq ft
2072 Bridgeport Loop, Discovery Bay, CA 94505
SOLD SEP 3, 2026
$824,000
E
4 beds2.5 baths3,030 sq ft
834 Blue Mesa Ct, Discovery Bay, CA 94505
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

$169,500

Est. take-home

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Refinance

Est. cash available

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Rent

$3,859/mo

Redfin rental estimate

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Market trends in 94505, CA

Last updated October 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

97.8%

+0.1% MoM

Median sale price

$745K

$20K MoM

Avg. days on market

46d

13 days MoM

Recently sold homes

2 MoM

New listings for sale

$949,000
3 beds2 baths1,773 sq ft
1814 Dune Point Way, Discovery Bay, CA 94505
$1,350,000
4 beds2.5 baths2,865 sq ft
2043 Windward Pt, Discovery Bay, CA 94505
$689,000
4 beds3 baths2,528 sq ft
3158 Castle Rock Loop, Discovery Bay, CA 94505
$1,399,988
3 beds3 baths2,823 sq ft
3973 Bolinas Pl, Discovery Bay, CA 94505
VIDEO TOUR
$1,045,000
3 beds3 baths1,524 sq ft
1466 Marlin Pl, Discovery Bay, CA 94505
$949,000
5 beds3 baths3,016 sq ft
5510 Lanai Ct, Discovery Bay, CA 94505
$629,000
3 beds2.5 baths1,706 sq ft
3729 Catamaran Ct, Discovery Bay, CA 94505
LISTED BY REDFIN
$775,000
4 beds3 baths2,695 sq ft
8586 Pinehollow Cir, Discovery Bay, CA 94505
$599,000
3 beds2 baths1,484 sq ft
3583 Sailboat Dr, Discovery Bay, CA 94505
See all

Provided by Redfin

Sale history for 3507 Keystone Loop

Year

Property tax

Land + Additions

Assessment*

2026

$10,285 (+62.9%)

$150,000 + $575,000

$725,000

2025

$6,315 (+5.8%)

$150,000 + $575,000

$725,000

2024

$5,969 (+1.6%)

$37,676 + $339,131

$376,807

2023

$5,876 (+1.7%)

$36,938 + $332,482

$369,420

2022

$5,779 (+2.3%)

$36,214 + $325,963

$362,177

2021

$5,647 (+0.6%)

$35,504 + $319,572

$355,076

2020

$5,613 (+1.3%)

$34,808 + $313,306

$348,114

2019

$5,539 (+4.1%)

$34,452 + $310,094

$344,546

2018

$5,320 (+2.3%)

$33,777 + $304,014

$337,791

2017

$5,199 (+6.2%)

$32,466 + $292,209

$324,675

2016

$4,896 (+3.2%)

$32,466 + $292,209

$324,675

2015

$4,743 (+2.0%)

$31,830 + $286,480

$318,310

2014

$4,651 (+1.0%)

$30,738 + $276,650

$307,388

2013

$4,606 (+1.6%)

$30,738 + $276,650

$307,388

2012

$4,532 (+9.8%)

$30,600 + $275,400

$306,000

2011

$4,128 (+0.6%)

$30,000 + $270,000

$300,000

2010

$4,101 (+1.7%)

$84,844 + $186,656

$271,500

2009

$4,034 (−29.4%)

$86,875 + $191,125

$278,000

2008

$5,710

$86,875 + $191,125

$278,000

Tax history for 3507 Keystone Loop

Year

Property tax

Land + Additions

Assessment*

2026

$10,285 (+62.9%)

$150,000 + $575,000

$725,000

2025

$6,315 (+5.8%)

$150,000 + $575,000

$725,000

2024

$5,969 (+1.6%)

$37,676 + $339,131

$376,807

2023

$5,876 (+1.7%)

$36,938 + $332,482

$369,420

2022

$5,779 (+2.3%)

$36,214 + $325,963

$362,177

2021

$5,647 (+0.6%)

$35,504 + $319,572

$355,076

2020

$5,613 (+1.3%)

$34,808 + $313,306

$348,114

2019

$5,539 (+4.1%)

$34,452 + $310,094

$344,546

2018

$5,320 (+2.3%)

$33,777 + $304,014

$337,791

2017

$5,199 (+6.2%)

$32,466 + $292,209

$324,675

2016

$4,896 (+3.2%)

$32,466 + $292,209

$324,675

2015

$4,743 (+2.0%)

$31,830 + $286,480

$318,310

2014

$4,651 (+1.0%)

$30,738 + $276,650

$307,388

2013

$4,606 (+1.6%)

$30,738 + $276,650

$307,388

2012

$4,532 (+9.8%)

$30,600 + $275,400

$306,000

2011

$4,128 (+0.6%)

$30,000 + $270,000

$300,000

2010

$4,101 (+1.7%)

$84,844 + $186,656

$271,500

2009

$4,034 (−29.4%)

$86,875 + $191,125

$278,000

2008

$5,710

$86,875 + $191,125

$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

6,500 Sq. Ft.

Year renovated

2004

Sq. Ft.

3,030

Year built

2003

Style

Single Family Residential

County

Contra Costa County

APN

0114210180

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Oct 30, 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
Garage Spaces: 2
Covered Spaces: 2
Parking Features: Attached, Garage Door Opener

Interior

Virtual Tour

Bathroom Information
# of Bathrooms Total: 3
# of Bathrooms Full: 2
# of Bathrooms Partial: 1

Interior Features
Interior Features: Breakfast Bar, Counter - Solid Surface
Appliances: Dishwasher, Gas Range, Gas Water Heater
Laundry Features: Laundry Room
Street Level Features: 0.5 Bath, 1 Bedroom, Laundry Facility, Main Entry, No Steps to Entry, Primary Bedrm Suite - 1
Window Features: Window Coverings
Fireplaces Total: 1
Has Fireplace
Flooring: Carpet, Tile

Room Information
Kitchen Features: Breakfast Bar,Counter - Solid Surface,Dishwasher,Disposal,Gas Range/Cooktop
Rooms Total: 10
Room Type: Loft
Fireplace Features: Living Room

Exterior

Building Information
Construction Materials: Stucco
Building Area Total: 3,030

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

Pool Information
Pool Features: Community

Property Information
Living Area: 3030
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 2003

Lot Information
Lot Size Square Feet: 6500
Lot Size Area: 0.15
Lot Size Units: Acres
Lot Size Acres: 0.15
Lot Features: Level, Back Yard, Curb(s), Front Yard, Landscaped, Sprinklers In Rear

Utilities

Utility Information
Utilities: Internet Available, Natural Gas Available, Natural Gas Connected, Individual Electric Meter, Individual Gas Meter

Heating & Cooling
Has Heating
Heating: Forced Air
Cooling: Central Air

Location

Homeowners Association Information
Has Association
Association Amenities: Clubhouse, Greenbelt, Playground, Pool, Gated, Park
Association Name: LAKESHORE HOA
Association Fee: $245
Association Fee Includes: Management Fee, Maintenance Grounds
Association Fee Frequency: Monthly

Public facts

Beds: 4
Baths: 3.0
Sq. Ft.: 3,030
Stories: 2.0
Lot Size: 6,500 square feet
Style: Single Family Residential
Year Built: 2003
Year Renovated: 2004
County: Contra Costa County
APN: 0114210180

Home facts updated by county records on Oct 30, 2026

Around this home

Schools

K - 12
Preschool & daycare

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

$742,000 – $899,000

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Nearby similar homes

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New listings for sale in 94505

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VIDEO TOUR

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LISTED BY REDFIN3D WALKTHROUGH

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Single-story home • Local parks • Shopping

Home values near 3507 Keystone Loop

Data from public records.

Address	Redfin Estimate
3483 Keystone Loop, Discovery Bay, CA 3 Beds \| 3 Baths \| 2562 Sq. Ft.	$668,071
3501 Keystone Loop, Discovery Bay, CA 3 Beds \| 3 Baths \| 2562 Sq. Ft.	$733,834
3527 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4011 Sq. Ft.	$849,506
3520 Keystone Loop, Discovery Bay, CA 4 Beds \| 3 Baths \| 3030 Sq. Ft.	$764,039
3500 Keystone Loop, Discovery Bay, CA 3 Beds \| 2 Baths \| 2033 Sq. Ft.	$711,303
3444 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 3517 Sq. Ft.	$803,270
3656 Otter Brook Loop, Discovery Bay, CA 6 Beds \| 3 Baths \| 3536 Sq. Ft.	$908,038

Address	Redfin Estimate
3489 Keystone Loop, Discovery Bay, CA 4 Beds \| 4 Baths \| 4088 Sq. Ft.	$1,060,003
3515 Keystone Loop, Discovery Bay, CA 4 Beds \| 4 Baths \| 3518 Sq. Ft.	$803,297
3533 Keystone Loop, Discovery Bay, CA 5 Beds \| 3 Baths \| 2562 Sq. Ft.	$772,710
3516 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4011 Sq. Ft.	$742,763
3460 Keystone Loop, Discovery Bay, CA 4 Beds \| 3 Baths \| 2562 Sq. Ft.	$752,065
3438 Keystone Loop, Discovery Bay, CA 6 Beds \| 4 Baths \| 4088 Sq. Ft.	$866,777
3639 Otter Brook Loop, Discovery Bay, CA 3 Beds \| 4 Baths \| 3097 Sq. Ft.	$697,120

Address	Redfin Estimate
3495 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4011 Sq. Ft.	$956,940
3521 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4088 Sq. Ft.	$827,370
3526 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4088 Sq. Ft.	$811,050
3508 Keystone Loop, Discovery Bay, CA 3 Beds \| 3 Baths \| 2562 Sq. Ft.	$730,437
3450 Keystone Loop, Discovery Bay, CA 5 Beds \| 2.5 Baths \| 3030 Sq. Ft.	$814,925
3684 Otter Brook Loop, Discovery Bay, CA 4 Beds \| 3.5 Baths \| 3097 Sq. Ft.	$780,967
3645 Otter Brook Loop, Discovery Bay, CA 5 Beds \| 3 Baths \| 3536 Sq. Ft.	$809,835

Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2025. 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 3507 Keystone Loop

Tax history for 3507 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 3507 Keystone Loop

More real estate resources