531 Walnut St, San Bruno, CA 94066 Property Records

San Mateo County property record for 531 Walnut St, San Bruno, CA 94066

Property Summary

Property Type	Single Family Home
Details	2 bd · 1 ba · 1,030 sqft · built 1951
Lot Size	0.115 acres (5,000 sqft)
Owner	2 Company Names on Record
Last Sale	$998,000 (Jan 2022)
Tax Bill	$17,923 (2025)
Deeds & Mortgages	Jan 2022 Sale & Mortgage Jun 2021 Sale
Flood Zone	Zone X (minimal risk)
APN	`020-181-140`

Property Details

APN / Parcel Number

Primary APN	`020-181-140`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Total Rooms	5 Rooms
Stories	1 Story
Building Area	1,030 sqft Living Area
1st Floor Area	1,030 sqft
Family Room	Family Room

Exterior

Year Built	Built 1951
Effective Year Built	Effective 1951
Lot Area	5,000 sqft (0.115 acres)
Lot Dimensions	100 ft deep x 50 ft wide
View / Lot	Corner
Garage Area	630 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	531 WALNUT ST
City	SAN BRUNO
State	CA
Zip	94066-3241
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10006
Legal Description	LOTS 22 & 23 BLOCK 4 BELLE AIR PARK RSM 5/10
Legal Subdivision	BELLE AIR PARK
Legal Block	4
Legal Lot Number	22,23
Jurisdiction	SAN MATEO CA
Township / Civil Division	SOUTH SAN FRANCISCO
Census Block Group	1
Census Block	1005
Census Tract	604200

Owner

Source: San Mateo County records, as of July 15, 2026

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

Owner of Record	2 Company Names on Record
Mailing Address	2809 RIVERA DR, BURLINGAME, CA 94010-5831
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Jan 19, 2022	Grant Deed, Transfer · Conventional Mortgage CITIBANK NA
Jun 16, 2021	Grant Deed, Transfer FIRSTAMERICAN TITLE COMPANY, FIRST AMERICAN TITLE COMPANY

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jan 19, 2022 · Amount on Record
Deed Sale	Jan 19, 2022 · Amount on Record
Prior Sale	Jun 16, 2021 · Amount on Record
Deed Document Number	20224746
Record Updated	Oct 29, 2026

January 2022: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Jan 19, 2022
Property Address	531 WALNUT ST, SAN BRUNO, CA 94066-3241
Document Number	0000004746
Map Reference	MB 5 PG 10
Instrument Date	Jan 13, 2022
Instrument	2022-004746
Transaction Type	Transfer
Record Updated	Feb 14, 2022
Title Company	NOT AVAILABLE, DOMA TITLE OF CALIFORNIA INC

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$1,097.80
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Tenants in Common
Address	531 WALNUT ST, SAN BRUNO, CA 94066-3241

Mortgage

Document Number	0000004747
Date	Jan 19, 2022
Instrument	2022-004747

Lender

Name	CITIBANK NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Feb 1, 2052

June 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Jun 16, 2021
Property Address	531 WALNUT ST, SAN BRUNO, CA 94066-3241
Document Number	0000091885
Map Reference	MB 5 PG 10
Instrument Date	Jun 7, 2021
Instrument	2021-091885
Transaction Type	Transfer
Record Updated	Jul 6, 2021
Title Company	FIRSTAMERICAN TITLE COMPANY, FIRST AMERICAN TITLE COMPANY

Transaction

Amount	Amount Recorded
Tax	$775.50
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	531 WALNUT ST, SAN BRUNO, CA 94066-3241

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	San Bruno City
Elementary School District	San Bruno Park 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		$1,423,598 (+2%) Land $725,229 Building $698,369
2025	$17,923.00 (+2.98%)	$1,395,685 (+26.77%) Land $711,009 Building $684,676
2024	$17,405.00 (+43.56%)
2023	$12,124.00 (+9.6%)	$1,100,960 Land $683,400 Building $417,560	$895,860
2022	$11,062.00

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
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 29 policies
Community Rating System	Class 8 (10% premium discount)
Nearby Flood Policies	29 in force
Nearby Flood Claims	5 (2021–2022)
Most Recent Claim	Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides
Claims by Event	Severe Winter Storms, Flooding, Landslides, And Mudslides, Dec 2022 · 2 claims

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	Not rated no burnable land within 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 SAN BRUNO serves 42,631 people · EPA ID CA4110023
Water Source	Purchased surface water from several systems
Last State Inspection	Jul 2024
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 827 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber · Fixed Wireless, DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
Etheric Networks Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: Astound Broadband, GeoLinks, Sonic Telecom.

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