3489 Keystone Loop, Discovery Bay, CA 94505

Off market jun 2020 for $825K

$1,060,003

Est. refi paymentEst. refi $5,443/mo

•

4 ba

•

4,088

sq ft

3489 Keystone Loop, Discovery Bay, CA 94505

About this home

Single-familyProperty Type

2003Year Built

8,600 sq ftLot Size

$259Est. Price/Sq.Ft.

3 car garageParking

Listed by NEOMI LOPEZ •DRE #01892756 • INTERO REAL ESTATE SVC.

Bought with Rusti Woodruff •DRE #01352178 • Intero Real Estate Services

Source:Greater Lansing AoR #40749147

Listing provided courtesy of Greater Lansing AoR

Redfin Estimate

$1,060,003

$235K since sold in June 2020$1,000 since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 18.1% higher than the average sale price ($898K) of 6 comparable homes.

SOLD OCT 30, 2026
$760,000
A
4 beds3.5 baths3,102 sq ft
6391 Crystal Springs Cir, Discovery Bay, CA 94505
SOLD SEP 3, 2026
$824,000
B
4 beds2.5 baths3,030 sq ft
834 Blue Mesa Ct, Discovery Bay, CA 94505
SOLD JAN 29, 2026
$858,000
C
5 beds4 baths4,011 sq ft
531 Half Moon Ct, Discovery Bay, CA 94505
SOLD BY REDFIN APR 14, 2026
$818,000
D
5 beds4 baths4,011 sq ft
3432 Keystone Loop, Discovery Bay, CA 94505
SOLD SEP 4, 2026
$745,000
E
4 beds3 baths2,704 sq ft
1525 Coleridge Way, Discovery Bay, CA 94505
SOLD OCT 7, 2026
$1,380,000
F
4 beds3.5 baths4,271 sq ft
1917 Windward Pt, Discovery Bay, CA 94505
Portfolio Real Estate, Portfolio Real Estate

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Earn from this home

Sell

$427,353

Est. take-home

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Refinance

Est. cash available

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Rent

$4,468/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 3489 Keystone Loop

Year

Property tax

Land + Additions

Assessment*

2026

$12,433 (+3.0%)

$111,550 + $808,749

$920,299

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*

2026

$12,433 (+3.0%)

$111,550 + $808,749

$920,299

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.

Zoning and permits

Zoning
Permits

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 27, 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

Interior

Room Information
# of Rooms: 11

Exterior

Pool Information
Has Pool

Property Information
Subdivision Name: SUBDIVISION 8430
Living Sq. Ft: 4,088
Ground Floor Sq. Ft: 1,991
Building Sq. Ft: 4,088
# of Stories: 2
Legal Description: T8430 L15

Parking & Garage Information
Garage/Parking Sq. Ft: 715

Lot Information
# of Buildings: 1
Land Sq. Ft: 8,600
Legal Lot Number: 15
Acres: 0.1974
Zoning Code: P-1
County Use Description: SINGLE FAMILY DETACHED WITH MA

Financial

Assessor Information
Assessment Year: 2026

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 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 • 4.6mi

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 – $1.22M

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Nearby similar homes

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Volume ceilings • Oversized sliders • High-end gas cooktop

NEW CONSTRUCTION

$695,000

4 beds3 baths2,091 sq ft

1025 Bluebell Cir, Discovery Bay, CA 94505

Quartz counter tops • 10 x 20 patio • Car charger

New listings for sale in 94505

$949,000

3 beds2 baths1,773 sq ft

1814 Dune Point Way, Discovery Bay, CA 94505

Waterfront retreat • Low maintenance yard • New gutters

$1,350,000

4 beds2.5 baths2,865 sq ft

2043 Windward Pt, Discovery Bay, CA 94505

Waterfront deck • Private dock • Boat hoist

$689,000

4 beds3 baths2,528 sq ft

3158 Castle Rock Loop, Discovery Bay, CA 94505

Gated community • Two-way fireplace • Eat-in kitchen

$1,399,988

3 beds3 baths2,823 sq ft

3973 Bolinas Pl, Discovery Bay, CA 94505

Premium lot • Open floor plan • Custom fireplace

VIDEO TOUR

$1,045,000

3 beds3 baths1,524 sq ft

1466 Marlin Pl, Discovery Bay, CA 94505

Open-concept living • 2 garage spots • Built 1981

$949,000

5 beds3 baths3,016 sq ft

5510 Lanai Ct, Discovery Bay, CA 94505

Gated community • Lower level bedroom • Gourmet kitchen

$629,000

3 beds2.5 baths1,706 sq ft

3729 Catamaran Ct, Discovery Bay, CA 94505

Two story home • Dramatic entry • Expansive windows

LISTED BY REDFIN3D WALKTHROUGH

$775,000

4 beds3 baths2,695 sq ft

8586 Pinehollow Cir, Discovery Bay, CA 94505

Wood flooring • Plantation shutters • Spacious kitchen

$599,000

3 beds2 baths1,484 sq ft

3583 Sailboat Dr, Discovery Bay, CA 94505

Single-story home • Local parks • Shopping

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.	$781,029
3471 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4011 Sq. Ft.	$1,024,210
3495 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4011 Sq. Ft.	$956,940
3515 Keystone Loop, Discovery Bay, CA 4 Beds \| 4 Baths \| 3518 Sq. Ft.	$803,297
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
3684 Otter Brook Loop, Discovery Bay, CA 4 Beds \| 3.5 Baths \| 3097 Sq. Ft.	$780,967

Address	Redfin Estimate
3459 Keystone Loop, Discovery Bay, CA 4 Beds \| 2.5 Baths \| 3030 Sq. Ft.	$779,917
3477 Keystone Loop, Discovery Bay, CA 3 Beds \| 2 Baths \| 2033 Sq. Ft.	$716,627
3501 Keystone Loop, Discovery Bay, CA 3 Beds \| 3 Baths \| 2562 Sq. Ft.	$733,834
3521 Keystone Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 4088 Sq. Ft.	$827,370
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
3693 Otter Brook Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 3648 Sq. Ft.	$804,338

Address	Redfin Estimate
3465 Keystone Loop, Discovery Bay, CA 4 Beds \| 4 Baths \| 4088 Sq. Ft.	$822,525
3483 Keystone Loop, Discovery Bay, CA 3 Beds \| 3 Baths \| 2562 Sq. Ft.	$668,071
3507 Keystone Loop, Discovery Bay, CA 4 Beds \| 2.5 Baths \| 3030 Sq. Ft.	$780,953
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
3669 Otter Brook Loop, Discovery Bay, CA 5 Beds \| 4 Baths \| 3501 Sq. Ft.	$725,821

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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

Zoning and permits

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