1150 Grubstake Dr, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 1150 Grubstake Dr, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,344 sqft · built 1980
Lot Size	0.197 acres (8,565 sqft)
Owner	2 Trust Names on File
Last Sale	$270,000 (Aug 1998)
Tax Bill	$5,900 (2025)
Deeds & Mortgages	Mar 2023 Transfer Mar 2023 Transfer
Flood Zone	Zone X (minimal risk)
APN	`8701-030-014`

Property Details

APN / Parcel Number

Primary APN	`8701-030-014`

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 1980
Effective Year Built	Effective 1980
Architectural Style	Conventional
Exterior Material	Stucco
Construction Type	Wood
Roof Type	Gable
Roof Material	Wood Shingle
Lot Area	8,565 sqft (0.197 acres)
Lot Dimensions	125 ft deep x 70 ft wide
Garage Type	Attached

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Water Source	Commercial

Location & Zoning

Street Address	1150 GRUBSTAKE DR
City	DIAMOND BAR
State	CA
Zip	91765-2345
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCR18000*
Legal Description	*TR=35026 LOT 42
Legal Subdivision	35026
Legal Tract	35026
Legal Block	1
Legal Lot Number	42
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	1
Census Block	1006
Census Tract	403320

Owner

1150 Grubstake Dr is held in a trust since January 2023.

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

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	2 Trust Names on File
Mailing Address	1150 GRUBSTAKE DR, DIAMOND BAR, CA 91765-2345
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Mar 1, 2023	Intrafamily Transfer, Transfer
Mar 1, 2023	Intrafamily Transfer, Transfer

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Aug 25, 1998 · Amount on File
Deed Sale	Aug 25, 1998 · Amount on File
Deed Document Number	19981516327
Last Transfer Date	Jan 14, 2023
Transfer Doc	0000131697
Record Updated	Oct 29, 2026

March 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	LOS ANGELES CA
Recording Date	Mar 1, 2023
Property Address	1150 GRUBSTAKE DR, DIAMOND BAR, CA 91765-2345
Document Number	0000131697
Map Reference	MB 919 PG 31-37
Instrument Date	Jan 14, 2023
Instrument	23-0131697
Transaction Type	Transfer
Record Updated	Mar 9, 2023

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	1150 GRUBSTAKE DR, DIAMOND BAR, CA 91765-2345

March 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	LOS ANGELES CA
Recording Date	Mar 1, 2023
Property Address	1150 GRUBSTAKE DR, DIAMOND BAR, CA 91765-2345
Document Number	0000131698
Map Reference	MB 919 PG 31-37
Instrument Date	Jan 14, 2023
Instrument	23-0131698
Transaction Type	Transfer
Record Updated	Jun 7, 2023

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Family Trust
Address	1150 GRUBSTAKE DR, DIAMOND BAR, CA 91765-2345

Tax Assessment & Valuation

The 2025 property tax bill for 1150 Grubstake Dr was $5,900.

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		$431,720 (+2%) Land $160,692 Building $271,028
2025	$5,900.00	$423,256 Land $157,542 Building $265,714
2023	$5,389.00 (+2.12%)	$406,822 Land $151,425 Building $255,397
2022	$5,277.00

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

Flood

FEMA maps place 1150 Grubstake Dr in Zone X, an area of minimal flood risk.

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

Wildfire risk around 1150 Grubstake Dr is low, with less than a 0.01% annual chance of 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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