818 Irwin Dr, Hillsborough (Burlingame), CA 94010 Property Records

San Mateo County property record for 818 Irwin Dr, Hillsborough, CA 94010

Property Summary

Property Type	Single Family Home
Details	5 bd · 6.5 ba · 6,219 sqft · built 1927
Lot Size	0.971 acres (42,304 sqft)
Owner	Company Name on Record
Last Sale	$12,000,000 (Dec 2025)
Tax Bill	$108,567 (2025)
Deeds & Mortgages	May 2024 Mortgage Dec 2025 Sale & Mortgage + 2 more
Flood Zone	Zone X (minimal risk)
APN	`028-083-010`

Property Details

APN / Parcel Number

Primary APN	`028-083-010`

Interior

Bedrooms	5 Beds
Full Baths	6.5 Baths
Half Baths	1 Half Bath
Total Rooms	14 Rooms
Stories	2 Stories
Building Area	6,219 sqft Living Area
Gross Area	6,819 sqft
1st Floor Area	3,850 sqft
2nd Floor Area	2,813 sqft
Basement Area	600 sqft
Family Room	Family Room
Study	Study

Exterior

Year Built	Built 1927
Effective Year Built	Effective 1927
Lot Area	42,304 sqft (0.971 acres)
Lot Dimensions	202 ft deep x 206 ft wide
Garage Area	900 sqft
Parking Spaces	4 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	818 IRWIN DR
City	HILLSBOROUGH
State	CA
Zip	94010-6328
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10025
Legal Description	LOT 5 MAP OF IRWIN PROPERTY RSM 11/52 53 TOWN OF HILLSBOROUGH
Legal Subdivision	MAP OF IRWIN PROPERTY
Legal Lot Number	5
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	1
Census Block	1013
Census Tract	605600

Owner

Source: San Mateo County records, as of July 15, 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	Company Name on Record
Mailing Address	132 VAILWOOD PL, SAN MATEO, CA 94403-4900
Owner Type	Company
Vesting	Limited Liability Partnership

Deeds, Mortgages & Sale History

Date	Document
May 14, 2024	Deed of Trust, Mortgage · Commercial Mortgage GREEN BANKER LLC
Dec 15, 2025	Grant Deed, Transfer · Commercial Mortgage ZUO ZUOAN
Dec 15, 2025	Grant Deed, Transfer ORANGE COAST TITLE COMPANY, ORANGE COAST TTL CO OF NOCAL
Jul 20, 2023	Intrafamily Transfer, Transfer

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Dec 15, 2025 · Amount on Record
Deed Sale	Dec 15, 2025 · Amount on Record
Prior Sale	Jul 24, 2013 · Amount on Record
Deed Document Number	202568425
Prior Transfer Date	Dec 26, 2006
Prior Transfer Doc	0000001405
Record Updated	Oct 29, 2026

May 2024: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	818 IRWIN DR, HILLSBOROUGH, CA 94010-6328
Transaction Type	Mortgage
Record Updated	Feb 18, 2026
Title Company	ORANGE COAST TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	818 IRWIN DR, HILLSBOROUGH, CA 94010-6328

Mortgage

Document Number	0000025311
Date	May 14, 2024
Instrument	2024-025311

Lender

Name	GREEN BANKER LLC
Type	Non-Lending Institution
Address	BURLINGAME, CA 94010

Agreement

Type	Commercial Mortgage
Amount	Amount Recorded

December 2025: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Dec 15, 2025
Property Address	818 IRWIN DR, HILLSBOROUGH, CA 94010-6328
Document Number	0000068425
Map Reference	MB 11 PG 52&53
Instrument Date	Dec 8, 2025
Instrument	2025-068425
Transaction Type	Transfer
Record Updated	Jan 7, 2026
Title Company	ORANGE COAST TITLE COMPANY, ORANGE COAST TTL CO OF NOCAL

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$13,200.00
Amount Accuracy	Rounded by County
Additional	Arm's Length Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	132 VAILWOOD PL, SAN MATEO, CA 94403-4900

Mortgage

Document Number	0000068426
Date	Dec 15, 2025
Instrument	2025-068426

Lender

Name	ZUO ZUOAN
Type	Private Party

Agreement

Type	Commercial Mortgage
Amount	Amount Recorded

December 2025: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Dec 15, 2025
Property Address	818 IRWIN DR, HILLSBOROUGH, CA 94010-6328
Document Number	0000068425
Map Reference	MB 11 PG 52&53
Instrument Date	Dec 8, 2025
Instrument	2025-068425
Transaction Type	Transfer
Record Updated	Feb 18, 2026
Title Company	ORANGE COAST TITLE COMPANY, ORANGE COAST TTL CO OF NOCAL

Transaction

Amount	Amount Recorded
Tax	$13,200.00
Amount Accuracy	Rounded by County
Additional	Arm's Length Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	132 VAILWOOD PL, SAN MATEO, CA 94403-4900

July 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SAN MATEO CA
Recording Date	Jul 20, 2023
Property Address	818 IRWIN DR, HILLSBOROUGH, CA 94010-6328
Document Number	0000034813
Map Reference	MB 11 PG 52&53
Instrument Date	Jul 20, 2023
Instrument	2023-034813
Transaction Type	Transfer
Record Updated	Feb 18, 2026

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	818 IRWIN DR, HILLSBOROUGH, CA 94010-6328

Tax Assessment & Valuation

Source: San Mateo County assessment roll, as of July 15, 2026

Property Jurisdictions

Type	Name
State	California
County	San Mateo County
Municipality	Hillsborough Town
Elementary School District	Hillsborough City Elementary School District (KG - 08)
Secondary School District	San Mateo Union High School District (09 - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$11,995,716 (+30.9%) Land $8,295,716 Building $3,700,000
2025	$108,567.00 (+2.07%)	$9,164,370 (+4.04%) Land $5,757,265 Building $3,407,105
2024	$106,370.00 (+1.54%)
2023	$104,760.00 (+4.31%)	$8,808,512 Land $5,533,704 Building $3,274,808	$8,717,850
2022	$100,431.00

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

Source: FEMA National Flood Hazard Layer, effective September 10, 2026 · 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	4 in force
Nearby Flood Claims	3 (1998–2023)
Claims Outside the SFHA	3 of 3
Most Recent Claim	Jan 2023 · Severe Winter Storms, Flooding, Landslides, And Mudslides

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 97% of the US · lower than 97.8% of California
Wildfire Likelihood	Under 0.01% annual chance
Exposure	Direct burnable vegetation

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	TOWN OF HILLSBOROUGH serves 11,766 people · EPA ID CA4110016
Water Source	Purchased surface water from SAN FRANCISCO REGIONAL WATER SYSTEM
Last State Inspection	Mar 2026
Lead	Under 1 ppb (2023–2025) 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 189 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250

May also be available: AT&T, Etheric Networks, Sonic Telecom, Verizon.

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