515 Keystone Blvd, Patterson, CA 95363 Property Records

Stanislaus County property record for 515 Keystone Blvd, Patterson, CA 95363

Property Summary

Property Type	Commercial Office
Details	15,836 sqft · built 2005
Lot Size	2.5 acres (108,900 sqft)
Owner	Company Name on Record
Last Sale	$1,750,000 (Nov 2019)
Tax Bill	$44,868 (2025)
Deeds & Mortgages	Aug 2026 Mortgage Nov 2019 Sale
Flood Zone	Zone X (minimal risk)
APN	`021-088-013-000`

Property Details

APN / Parcel Number

Primary APN	`021-088-013-000`
Alternative APN	`0218813000`

Interior

Building Area	15,836 sqft Total Area

Exterior

Year Built	Built 2005
Effective Year Built	Effective 2005
Construction Type	Wood
Fire Resistance	Wood or Wood & Steel Frame
Lot Area	108,900 sqft (2.5 acres)

Location & Zoning

Street Address	515 KEYSTONE BLVD
City	PATTERSON
State	CA
Zip	95363-8861
Property Category	Commercial
Property Type	Commercial > Office > Commercial Office
Local Zoning Code	PI
Legal Subdivision	KEYSTONE PACIFIC BUSINESS PARK PHASE 4
Legal Block	2
Jurisdiction	STANISLAUS CA
Township / Civil Division	PATTERSON
Census Block Group	2
Census Block	2104
Census Tract	3300

Owner

Source: Stanislaus County records, as of August 14, 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	Company Name on Record
Mailing Address	PO BOX 1047, PATTERSON, CA 95363-1047
Owner Type	Company

Deeds, Mortgages & Sale History

Date	Document
Aug 5, 2026	Deed of Trust, Mortgage · Conventional Mortgage WESTAMERICA BANK
Nov 27, 2019	Grant Deed, Transfer FIRST AMERICAN TITLE

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Nov 27, 2019 · Amount on Record
Deed Sale	Nov 27, 2019 · Amount on Record
Deed Document Number	201984126
Record Updated	Sep 20, 2026

August 2026: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	STANISLAUS CA
Recording Date	Aug 5, 2026
Property Address	515 KEYSTONE BLVD, PATTERSON, CA 95363-8861
Document Number	0000042865
Instrument Date	Jul 27, 2026
Instrument	202642865
Transaction Type	Mortgage
Record Updated	Aug 14, 2026
Title Company	STEWART TITLE, STEWART TITLE OF CALIFORNIA

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company, 103
Address	515 KEYSTONE BLVD, PATTERSON, CA 95363-8861

Mortgage

Document Number	0000042865,
Date	Aug 5, 2026
Instrument	202642865

Lender

Name	WESTAMERICA BANK

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate
Rate	6.49%
Initial Type	Adjustable Rate
Adjustable	Adjustable Rate Rider
Max Rate	-1%

November 2019: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	STANISLAUS CA
Recording Date	Nov 27, 2019
Property Address	515 KEYSTONE BLVD, PATTERSON, CA 95363-8861
Document Number	0000084126
Instrument Date	Nov 22, 2019
Instrument	84126
Transaction Type	Transfer
Record Updated	Dec 12, 2019
Title Company	FIRST AMERICAN TITLE

Transaction

Amount	Amount Recorded
Tax	$1,925.00
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	PO BOX 1047 PATTERSON CA 953631047, PATTERSON, CA 95363-1047

Tax Assessment & Valuation

Source: Stanislaus County assessment roll, as of October 8, 2025

Property Jurisdictions

Type	Name
State	California
County	Stanislaus County
Municipality	Patterson City
Unified School District	Patterson Joint Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2025	$44,868.00 (+5.87%) Additional exemption filed	$1,913,875 (+4.04%) Land $684,074 Building $1,229,801
2023	$42,380.00 (+7.78%)	$1,839,559 Land $657,511 Building $1,182,048
2022	$39,322.00

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

Source: FEMA National Flood Hazard Layer, effective October 23, 2022 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	8 in force
Nearby Flood Claims	1 (1983)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Mar 1983 · Coastal Storms, Floods, Slides & Tornadoes

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

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

Wildfire Risk	Low lower than 80% of the US · lower than 88% of California
Wildfire Likelihood	0.01% annual chance
Exposure	None beyond ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	CITY OF PATTERSON serves 24,977 people · EPA ID CA5010017
Water Source	Groundwater
Last State Inspection	Feb 2025
Lead	Under 1 ppb (2022–2024) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 89 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
unWired Broadband Fixed Wireless	400 / 50
Ayera Technologies Fixed Wireless	120 / 40
Cal.net Fixed Wireless	100 / 20
T-Mobile Fixed Wireless	100 / 20

May also be available: Frontier, Verizon.

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