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Keystone Loop, Discovery Bay, CA Property Records

Contra Costa County property records for 44 addresses on Keystone Loop, Discovery Bay, CA · Last verified August 2026

Keystone Loop Highlights

Properties 44
Median Sale Price $796,000
Deeds and Mortgages on File 94
Median Price per Sqft $214
Owner Occupied 86%
Median Annual Tax Bill $9,485
Median Year Built 2003
Median Ownership Tenure 8 years

Properties on Keystone Loop

Owner names and prior sale amounts shown locked below are available instantly with a free trial.

3404 Keystone Loop

3 bd · 2 ba · 2,033 sqft · 0.179 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$265,000May 2011 $5,8282025 Amount on Record Oct 2003 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

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3405 Keystone Loop

4 bd · 2.5 ba · 3,030 sqft · 0.162 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$850,000Jul 2021 $10,8772025 Amount on Record Sep 2003 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

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3410 Keystone Loop

4 bd · 3 ba · 2,562 sqft · 0.174 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$290,000Aug 2009 $6,2102025 Amount on Record Nov 2003 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

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3411 Keystone Loop

5 bd · 4 ba · 4,011 sqft · 0.16 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$360,000Oct 2009 $7,2012025 Amount on Record Jul 2009 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

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3416 Keystone Loop

4 bd · 3 ba · 4,088 sqft · 0.167 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$683,494Jul 2026 $10,3302025 Amount on Record Nov 2003 1 Name on Record Assessor + 4 DocumentsUpdated Aug 2026

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3417 Keystone Loop

4 bd · 3 ba · 2,562 sqft · 0.16 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$400,000Oct 2003 $8,3402025 —Aug 2007 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

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3423 Keystone Loop

5 bd · 4 ba · 3,517 sqft · 0.16 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$580,000May 2019 $9,2772025 Amount on Record Dec 2003 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

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3424 Keystone Loop

4 bd · 4 ba · 3,517 sqft · 0.149 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$539,000Nov 2003 $10,5052025 —Oct 2002 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

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3429 Keystone Loop

4 bd · 4 ba · 4,285 sqft · 0.165 acres · Garage · Pool

Last Sale Tax Bill Prior Sale Owner Records
$855,000Apr 2023 $12,5622025 Amount on Record Nov 2019 2 Names on Record Owner Occupied Assessor + 4 DocumentsUpdated Jul 2026

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3432 Keystone Loop

5 bd · 4 ba · 4,011 sqft · 0.167 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$818,000Apr 2026 $9,5932025 Amount on Record Apr 2020 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

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3435 Keystone Loop

5 bd · 4 ba · 4,011 sqft · 0.167 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$609,000May 2020 $9,4852025 —Jul 2020 2 Names on Record Assessor + 4 DocumentsUpdated Jul 2026

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3438 Keystone Loop

4 bd · 3 ba · 4,088 sqft · 0.162 acres · Garage · Pool

Last Sale Tax Bill Prior Sale Owner Records
$639,000Mar 2020 $9,8452025 Amount on Record Nov 2003 2 Names on Record Owner Occupied Assessor + 4 DocumentsUpdated Jul 2026

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3441 Keystone Loop

3 bd · 2 ba · 2,033 sqft · 0.151 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$715,000Dec 2024 $9,9452025 Amount on Record Oct 2003 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

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3444 Keystone Loop

4 bd · 4 ba · 3,517 sqft · 0.156 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$750,000Mar 2023 $10,7382025 Amount on Record Aug 2020 2 Names on Record Owner Occupied Assessor + 4 DocumentsUpdated Jul 2026

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3447 Keystone Loop

4 bd · 3 ba · 2,562 sqft · 0.149 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$281,000Dec 2010 $6,0532025 Amount on Record Jan 2008 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

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3450 Keystone Loop

4 bd · 2.5 ba · 3,030 sqft · 0.156 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$839,000Jul 2022 $11,7532025 Amount on Record May 2015 1 Name on Record Assessor + 3 DocumentsUpdated Aug 2026

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3453 Keystone Loop

3 bd · 3 ba · 3,518 sqft · 0.149 acres · Garage · Pool

Last Sale Tax Bill Prior Sale Owner Records
$493,500Mar 2004 $10,4322025 1 Name on Record AssessorUpdated Jul 2026

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3459 Keystone Loop

4 bd · 2.5 ba · 3,030 sqft · 0.174 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$585,000Mar 2019 $9,3382025 Amount on Record Feb 2004 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

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3460 Keystone Loop

4 bd · 3 ba · 2,562 sqft · 0.172 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$725,000Oct 2024 $10,1312025 Amount on Record Apr 2004 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

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3465 Keystone Loop

4 bd · 4 ba · 4,088 sqft · 0.19 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$369,500Mar 2010 $7,4092025 Amount on Record Jan 2010 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

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3471 Keystone Loop

5 bd · 4 ba · 4,011 sqft · 0.188 acres · Garage · Pool

Last Sale Tax Bill Prior Sale Owner Records
$775,000Jul 2020 $11,8552025 Amount on Record Mar 2004 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

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3477 Keystone Loop

3 bd · 2 ba · 2,033 sqft · 0.16 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$552,000May 2018 $9,0692025 Amount on Record Jul 2013 1 Name on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

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3483 Keystone Loop

3 bd · 3 ba · 2,562 sqft · 0.16 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$242,300Jan 2010 $5,6122025 Amount on Record Mar 2004 2 Names on Record Assessor + 3 DocumentsUpdated Jul 2026

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3489 Keystone Loop

4 bd · 4 ba · 4,088 sqft · 0.197 acres · Garage · Pool

Last Sale Tax Bill Prior Sale Owner Records
$825,000Jun 2020 $12,0752025 Amount on Record Sep 2016 1 Name on Record Owner Occupied Assessor + 4 DocumentsUpdated Jul 2026

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3495 Keystone Loop

5 bd · 4 ba · 4,011 sqft · 0.197 acres · Garage · Pool

Last Sale Tax Bill Prior Sale Owner Records
$750,000Mar 2018 $11,4622025 Amount on Record Oct 2011 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

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3500 Keystone Loop

3 bd · 2 ba · 2,033 sqft · 0.172 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$585,000May 2006 $9,4852025 Amount on Record Apr 2004 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

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3501 Keystone Loop

3 bd · 3 ba · 2,562 sqft · 0.162 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$540,000Jun 2018 $8,8432025 Amount on Record Mar 2004 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

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3507 Keystone Loop

4 bd · 2.5 ba · 3,030 sqft · 0.149 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$725,000Oct 2025 $6,3142025 Amount on Record Oct 2011 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

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3508 Keystone Loop

3 bd · 3 ba · 2,562 sqft · 0.156 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$463,500Mar 2004 $9,3292025 —Nov 2013 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

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3515 Keystone Loop

4 bd · 4 ba · 3,518 sqft · 0.149 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$799,000Sep 2023 $11,1182025 Amount on Record Jan 2021 1 Name on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

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3516 Keystone Loop

5 bd · 4 ba · 4,011 sqft · 0.156 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$392,500Oct 2008 $7,6482025 Amount on Record May 2008 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

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3520 Keystone Loop

4 bd · 2.5 ba · 3,030 sqft · 0.165 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$455,000Apr 2004 $9,1972025 —Oct 2002 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

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3521 Keystone Loop

5 bd · 4 ba · 4,088 sqft · 0.149 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$900,000Apr 2022 $11,4042025 Amount on Record Aug 2020 1 Name on Record Owner Occupied Assessor + 6 DocumentsUpdated Jul 2026

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3526 Keystone Loop

5 bd · 4 ba · 4,088 sqft · 0.165 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$176,000Nov 2015 $6,8182025 Amount on Record Feb 2012 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

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3527 Keystone Loop

5 bd · 4 ba · 4,011 sqft · 0.156 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$533,000Jun 2025 $10,4842025 —Jun 2025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

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3532 Keystone Loop

3 bd · 3 ba · 3,517 sqft · 0.149 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$585,000Sep 2019 $9,1972025 Amount on Record Jul 2009 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

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3533 Keystone Loop

4 bd · 3 ba · 2,562 sqft · 0.16 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$532,000Mar 2017 $8,8762025 Amount on Record May 2004 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

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3538 Keystone Loop

5 bd · 4 ba · 4,011 sqft · 0.172 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$495,000May 2004 $12,1362025 —Jul 2024 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Aug 2026

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3539 Keystone Loop

4 bd · 2 ba · 2,033 sqft · 0.149 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$395,000May 2004 $8,3112025 —Oct 2002 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

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3545 Keystone Loop

4 bd · 3 ba · 3,517 sqft · 0.149 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$510,000Oct 2015 $8,7252025 Amount on Record Feb 2015 2 Names on Record Owner Occupied Assessor + 4 DocumentsUpdated Jul 2026

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3546 Keystone Loop

4 bd · 3 ba · 2,562 sqft · 0.172 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$420,000May 2004 $8,6512025 —Oct 2002 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

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3551 Keystone Loop

4 bd · 2.5 ba · 3,030 sqft · 0.158 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$796,000Jul 2021 $11,3682025 Amount on Record Jun 2015 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

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3554 Keystone Loop

4 bd · 2.5 ba · 3,030 sqft · 0.181 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$492,500May 2004 $9,8232025 —May 2004 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

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3557 Keystone Loop

4 bd · 4 ba · 4,088 sqft · 0.159 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$878,000Jan 2025 $11,8022025 Amount on Record Mar 2023 2 Names on Record Owner Occupied Assessor + 4 DocumentsUpdated Aug 2026

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Wildfire Risk on Keystone Loop

Source: USDA Forest Service Wildfire Risk to Communities · 2nd edition (2024), fuels as of 2020

Wildfire RiskLow
this street's cells rank at the 32nd percentile of exposed land nationally · 18th in California
Wildfire LikelihoodLow — about 1 in 2,128 per year
ExposureDirect
1 of 3 cells directly exposed · 1 adjoin burnable vegetation

Property Records in Nearby Streets