OFF MARKET

Off Market Jun 2020 for $825K

$1,066,140

Est. refi paymentEst. refi $5,333/mo

•

4,088

sq ft

3489 Keystone Loop, Discovery Bay, CA 94505

About this home

Want a bit of a Hawaii resort in your yard? Look no further!! Huge private lot with salt water pebble tech pool, spa, waterfall, swim up bar and stools, bar pavilion, outdoor Barbeque pavilion, outdoor lighting and outdoor stone fireplace. Has to be seen to be believed! Highly upgraded home interior, with custom kitchen cabinetry, slab granite, island, ceiling fans, closet organizers in every closet, custom window coverings, alarm system, surround sound in living room, and upstairs loft. 4 bedrooms plus office with loft. Super large master with reading room and fireplace.

Single-familyProperty Type

2003Year Built

0.31 acresLot Size

$261Est. Price/Sq.Ft.

3 car garageParking

Listed by Thomas Lyons •DRE #01111027 • RE/MAX Accord

Bought with Jessica Enos •DRE #01882332 • Weichert Realtors - HH and Associates

Redfin checked: 3 minutes ago

•Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #40904538

Redfin Estimate

$1,066,140

$241K since sold in June 2020$3,000 since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 8.8% higher than the average sale price ($980K) of 6 comparable homes.

SOLD JAN 29, 2026
$858,000
A
5 beds4 baths4,011 sq ft
531 Half Moon Ct, 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
SOLD AUG 24, 2026
$1,650,000
C
5 beds3.5 baths4,062 sq ft
885 Willow Lake Rd, Discovery Bay, CA 94505
BOUGHT WITH REDFIN JUN 15, 2026
$740,000
D
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 MAY 28, 2026
$950,000
E
5 beds3 baths3,714 sq ft
6144 Seneca Cir, Discovery Bay, CA 94505
SOLD FEB 17, 2026
$865,000
F
4 beds3 baths3,484 sq ft
2233 Hampshire Dr, Discovery Bay, CA 94505

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Earn from this home

Sell

$430,168

Est. take-home

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Refinance

Est. cash available

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Rent

$4,430/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

OPEN SUN, 12PM TO 2PM
$450,000
2 beds2 baths1,248 sq ft
5679 Schooner Loop, Discovery Bay, CA 94505
$549,999
4 beds2.5 baths1,782 sq ft
4108 Regatta Dr, Discovery Bay, CA 94505
COMING SOON
$574,900
3 beds2 baths1,484 sq ft
3733 Catamaran Ct, Discovery Bay, CA 94505
$850,000
5 beds4 baths3,917 sq ft
3159 Castle Rock Loop, Discovery Bay, CA 94505
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
$799,000
4 beds3 baths2,762 sq ft
2353 Wayfarer Dr, Discovery Bay, CA 94505
$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
See all

Provided by Redfin

Sale history for 3489 Keystone Loop

Date

Event

Price

bridgeMLS, Bay East AOR, or Contra Costa AOR #40904538

Jun 17, 2020

Sold

$825,000

$202/sq ft

May 18, 2020

Pending

—

May 12, 2020

Listed

$824,900

$202/sq ft

Public Records

Sep 30, 2016

Sold

$800,000

$196/sq ft

bridgeMLS, Bay East AOR, or Contra Costa AOR #40749147

Sep 30, 2016

Sold

$799,950

$196/sq ft

Sep 30, 2016

Sold

$799,950

$196/sq ft

Aug 17, 2016

Pending

—

Aug 5, 2016

Relisted

—

Jul 21, 2016

Contingent

—

Jul 14, 2016

Listed

$799,950

$196/sq ft

Jul 14, 2016

Listed

$799,950

$196/sq ft

+25

Year

Property tax

Land + Additions

Assessment*

2025

$12,076 (+4.6%)

$111,550 + $808,749

$920,299

2024

$11,542 (+1.6%)

$109,363 + $792,892

$902,255

2023

$11,365 (+1.6%)

$107,219 + $777,346

$884,565

2022

$11,181 (+2.4%)

$105,117 + $762,104

$867,221

2021

$10,916 (−2.0%)

$103,056 + $747,161

$850,217

2020

$11,140 (+1.1%)

$101,036 + $732,511

$833,547

2019

$11,015 (+3.9%)

$143,263 + $705,596

$848,859

2018

$10,600 (+2.7%)

$140,454 + $691,761

$832,215

2017

$10,324 (+41.6%)

$135,000 + $664,900

$799,900

2016

$7,292 (+8.9%)

$135,000 + $664,900

$799,900

2015

$6,694

$83,977 + $464,523

$548,500

2014

$6,689 (+12.7%)

$76,782 + $424,718

$501,500

2013

$5,934 (+19.3%)

$76,782 + $424,718

$501,500

2012

$4,976 (+0.3%)

$66,524 + $367,976

$434,500

2011

$4,963 (−4.7%)

$53,204 + $294,296

$347,500

2010

$5,205 (+1.2%)

$53,204 + $294,296

$347,500

2009

$5,144 (−25.2%)

$57,950 + $320,550

$378,500

2008

$6,876

$58,027 + $320,973

$379,000

Tax history for 3489 Keystone Loop

Year

Property tax

Land + Additions

Assessment*

2025

$12,076 (+4.6%)

$111,550 + $808,749

$920,299

2024

$11,542 (+1.6%)

$109,363 + $792,892

$902,255

2023

$11,365 (+1.6%)

$107,219 + $777,346

$884,565

2022

$11,181 (+2.4%)

$105,117 + $762,104

$867,221

2021

$10,916 (−2.0%)

$103,056 + $747,161

$850,217

2020

$11,140 (+1.1%)

$101,036 + $732,511

$833,547

2019

$11,015 (+3.9%)

$143,263 + $705,596

$848,859

2018

$10,600 (+2.7%)

$140,454 + $691,761

$832,215

2017

$10,324 (+41.6%)

$135,000 + $664,900

$799,900

2016

$7,292 (+8.9%)

$135,000 + $664,900

$799,900

2015

$6,694

$83,977 + $464,523

$548,500

2014

$6,689 (+12.7%)

$76,782 + $424,718

$501,500

2013

$5,934 (+19.3%)

$76,782 + $424,718

$501,500

2012

$4,976 (+0.3%)

$66,524 + $367,976

$434,500

2011

$4,963 (−4.7%)

$53,204 + $294,296

$347,500

2010

$5,205 (+1.2%)

$53,204 + $294,296

$347,500

2009

$5,144 (−25.2%)

$57,950 + $320,550

$378,500

2008

$6,876

$58,027 + $320,973

$379,000

*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

8,600 Sq. Ft.

Year renovated

2004

Sq. Ft.

4,088

Year built

2003

Style

Single Family Residential

County

Contra Costa County

APN

0114210156

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 26, 2025 • Active

Building/residential/p/pool

Remodel an existing swimming pool and spa.

Pool and hot tub

Jul 29, 2024 • Final

Building - residential mechanical

Remove and replace the heating and air conditioning system in the same locations. Install a new heat pump in the existing location of the air conditioning unit and a fan coil in the existing location of the heater in the attic.

Heat pump

HVAC

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, Side Yard Access, Tandem, Garage Door Opener

Interior

Virtual Tour

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

Interior Features
Interior Features: Bonus/Plus Room, Stone Counters, Eat-in Kitchen, Kitchen Island, Pantry, Updated Kitchen
Appliances: Dishwasher, Gas Range, Microwave, Range, Refrigerator
Laundry Features: Laundry Room
Street Level Features: 1 Bedroom, 1 Bath
Window Features: Window Coverings
Fireplaces Total: 2
Has Fireplace
Flooring: Hardwood, Carpet, Wood

Room Information
Kitchen Features: Counter - Stone,Dishwasher,Eat In Kitchen,Gas Range/Cooktop,Island,Microwave,Pantry,Range/Oven Built-in,Refrigerator,Updated Kitchen
Rooms Total: 11
Fireplace Features: Family Room

Exterior

Building Information
Construction Materials: Stucco
Building Area Total: 4,088

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

Mobile Home Information
Skirt: Brick

Pool Information
Pool Features: Gas Heat, Pool Sweep, Spa
Has Private Pool
Has Spa

Property Information
Living Area: 4088
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 2003

Lot Information
Lot Size Square Feet: 13650
Lot Size Area: 0.32
Lot Size Units: Acres
Lot Size Acres: 0.32
Lot Features: Cul-De-Sac, Premium Lot, Regular, Secluded

Utilities

Utility Information
Water Source: Public
Sewer: Public Sewer

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

Location

Homeowners Association Information
Has Association
Association Amenities: Clubhouse, Greenbelt, Pool, Gated, Spa/Hot Tub
Association Name: LAKESHORE HOA
Association Fee: $185
Association Fee Includes: Common Area Maint, Management Fee, Reserves, Security/Gate Fee
Association Fee Frequency: Monthly

Public facts

Beds: 4
Baths: 4.0
Sq. Ft.: 4,088
Stories: 2.0
Lot Size: 8,600 square feet
Style: Single Family Residential
Year Built: 2003
Year Renovated: 2004
County: Contra Costa County
APN: 0114210156

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 • 4.6mi

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

$1.01M – $1.23M

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Nearby similar homes

$850,000

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New listings for sale in 94505

OPEN SUN, 12PM TO 2PM

$450,000

2 beds2 baths1,248 sq ft

5679 Schooner Loop, Discovery Bay, CA 94505

$549,999

4 beds2.5 baths1,782 sq ft

4108 Regatta Dr, Discovery Bay, CA 94505

COMING SOON

$574,900

3 beds2 baths1,484 sq ft

3733 Catamaran Ct, Discovery Bay, CA 94505

$850,000

5 beds4 baths3,917 sq ft

3159 Castle Rock Loop, Discovery Bay, CA 94505

COMING SOON

$685,000

4 beds2.5 baths1,706 sq ft

3524 Sailboat Dr, Discovery Bay, CA 94505

REDFIN COMING SOON3D WALKTHROUGH

$849,000

4 beds3 baths2,455 sq ft

1280 Saint Andrews Dr, Discovery Bay, CA 94505

$799,000

4 beds3 baths2,762 sq ft

2353 Wayfarer Dr, Discovery Bay, CA 94505

$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

Home values near 3489 Keystone Loop

Data from public records.

Address	Redfin Estimate
3453 Keystone Loop, Discovery Bay, CA 3 Beds \| 3 Baths \| 3518 Sq. Ft.	$787,877
3471 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4011 Sq. Ft.	$1,027,556

Address	Redfin Estimate
3459 Keystone Loop, Discovery Bay, CA 4 Beds \| 2.5 Baths \| 3030 Sq. Ft.	$797,577
3477 Keystone Loop, Discovery Bay, CA 3 Beds \| 2 Baths \| 2033 Sq. Ft.	$735,677

Address	Redfin Estimate
3465 Keystone Loop, Discovery Bay, CA 4 Beds \| 4 Baths \| 4088 Sq. Ft.	$835,043
3483 Keystone Loop, Discovery Bay, CA 3 Beds \| 3 Baths \| 2562 Sq. Ft.	$673,335

Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2020. 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 3489 Keystone Loop

Tax history for 3489 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 3489 Keystone Loop

More real estate resources