1133 Grubstake Dr, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 1133 Grubstake Dr, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,344 sqft · built 1979
Lot Size	0.191 acres (8,304 sqft)
Owner	2 Individual Names on Record
Last Sale	$880,000 (May 2020)
Tax Bill	$12,072 (2025)
Deeds & Mortgages	May 2020 Sale & Mortgage Jun 2018 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`8701-029-018`

Property Details

APN / Parcel Number

Primary APN	`8701-029-018`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Total Rooms	10 Rooms
Stories	2 Stories
Building Area	2,344 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1979
Effective Year Built	Effective 1979
Architectural Style	Conventional
Exterior Material	Stucco
Construction Type	Wood
Roof Type	Gable
Roof Material	Wood Shingle
Lot Area	8,304 sqft (0.191 acres)
Lot Dimensions	106 ft deep x 76 ft wide
Garage Type	Attached

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Water Source	Commercial

Location & Zoning

Street Address	1133 GRUBSTAKE DR
City	DIAMOND BAR
State	CA
Zip	91765-2346
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCC3-R1800
Legal Description	*TR=35026 LOT 18
Legal Subdivision	35026
Legal Tract	35026
Legal Block	1
Legal Lot Number	18
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	1
Census Block	1008
Census Tract	403320

Owner

Source: Los Angeles County records, as of August 25, 2026

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

Owner of Record	2 Individual Names on Record
Mailing Address	1133 GRUBSTAKE DR, DIAMOND BAR, CA 91765-2346
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
May 18, 2020	Grant Deed, Transfer · Conventional Mortgage WELLS FARGO BANK NA
Jun 12, 2018	Grant Deed, Transfer · ARM STERLING BANK & TRUST FSB

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	May 18, 2020 · Amount on Record
Deed Sale	May 18, 2020 · Amount on Record
Prior Sale	Jun 12, 2018 · Amount on Record
Deed Document Number	2020541074
Record Updated	Oct 29, 2026

May 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	LOS ANGELES CA
Recording Date	May 18, 2020
Property Address	1133 GRUBSTAKE DR, DIAMOND BAR, CA 91765-2346
Document Number	0000541074
Map Reference	MB 919 PG 31-37
Instrument Date	Apr 29, 2020
Instrument	20-0541074
Transaction Type	Transfer
Record Updated	Sep 22, 2021
Title Company	WFG NATIONAL TITLE CO OF CA

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	1133 GRUBSTAKE DR, DIAMOND BAR, CA 91765-2346

Mortgage

Document Number	0000541075
Date	May 18, 2020
Instrument	20-0541075

Lender

Name	WELLS FARGO BANK NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Jun 1, 2050

June 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Jun 12, 2018
Property Address	1133 GRUBSTAKE DR, DIAMOND BAR, CA 91765-2346
Document Number	0000579436
Map Reference	MB 919 PG 31-37
Instrument Date	Apr 25, 2018
Instrument	18-0579436
Transaction Type	Transfer
Record Updated	Sep 22, 2021
Title Company	WFG NATIONAL TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	1133 GRUBSTAKE DR, DIAMOND BAR, CA 91765-2346

Mortgage

Document Number	0000579437
Date	Jun 12, 2018
Instrument	18-0579437

Lender

Name	STERLING BANK & TRUST FSB
Type	Bank

Agreement

Type	ARM
Amount	Amount Recorded
Term	361 Months
Due	Jul 1, 2048

Interest

Rate Type	Adjustable Rate
Rate	5.37%
Type Change Date	Jul 1, 2021
Change Frequency	Annually
Min Rate At Change	3.95%
Max Rate At Change	8.37%
Index	1-Year LIBOR
Max Rate	11.3%

Tax Assessment & Valuation

Source: Los Angeles County assessment roll, as of August 25, 2026

Property Jurisdictions

Type	Name
State	California
County	Los Angeles County
Municipality	Diamond Bar City
Unified School District	Walnut Valley Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$981,652 (+2%) Land $555,192 Building $426,460
2025	$12,072.00 (+7.45%) Homeowner's exemption	$962,405 (+4.04%) Land $544,306 Building $418,099
2023	$11,235.00 (+2.14%) Homeowner's exemption	$925,035 Land $523,171 Building $401,864
2022	$11,000.00

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

Flood

Source: FEMA National Flood Hazard Layer, effective September 30, 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Values are read at the parcel center point; 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 95% of the US · lower than 97% of California
Wildfire Likelihood	Under 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	WALNUT VALLEY WATER DISTRICT serves 100,941 people · EPA ID CA1910234
Water Source	Purchased surface water from several systems
Last State Inspection	Jun 2023
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 464 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Spectrum Cable · Fiber in parts of the area	1,000 / 1,000
Verizon Fixed Wireless	300 / 20
Starlink Satellite	280 / 30
T-Mobile Fixed Wireless	100 / 20
AT&T Fixed Wireless	100 / 20

May also be available: Frontier, GeoLinks.

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