421 Elm Ave, San Bruno, CA 94066 Property Records

San Mateo County property record for 421 Elm Ave, San Bruno, CA 94066

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,000 sqft · built 1947
Lot Size	0.115 acres (5,000 sqft)
Owner	Individual Name on File
Last Sale	$1,800,000 (Jul 2025)
Tax Bill	$16,115 (2025)
Deeds & Mortgages	Apr 2021 Mortgage Feb 2026 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`020-273-130`

Property Details

APN / Parcel Number

Primary APN	`020-273-130`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Stories	1 Story
Building Area	2,000 sqft Living Area
1st Floor Area	920 sqft
Family Room	Family Room
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1947
Effective Year Built	Effective 1947
Architectural Style	Ranch
Exterior Material	Stucco
Construction Type	Frame
Roof Material	Composition Shingle
Lot Area	5,000 sqft (0.115 acres)
Lot Dimensions	100 ft deep x 50 ft wide
Garage Area	300 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	421 ELM AVE
City	SAN BRUNO
State	CA
Zip	94066-4217
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10006
Legal Description	LOTS 3 & 4 BLOCK 4 HUNTINGTON PARK 1ST ADD RSM 5/40
Legal Subdivision	HUNTINGTON PARK 1ST ADD
Legal Block	4
Legal Lot Number	3,4
Jurisdiction	SAN MATEO CA
Township / Civil Division	SOUTH SAN FRANCISCO
Census Block Group	1
Census Block	1004
Census Tract	603900

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	Individual Name on File
Mailing Address	421 ELM AVE, SAN BRUNO, CA 94066-4217
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Single Man

Deeds, Mortgages & Sale History

Date	Document
Apr 12, 2021	Deed of Trust, Mortgage · Conventional Mortgage LOANDEPOT.COM LLC
Feb 12, 2026	Intrafamily Transfer, Transfer · Conventional Mortgage STAR ONE CU
Dec 3, 2018	Quit Claim Deed, Transfer ATTORNEY ONLY

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Jul 28, 2025 · Amount on File
Deed Sale	Jul 28, 2025 · Amount on File
Prior Sale	Jun 13, 2016 · Amount on File
Deed Document Number	202538373
Prior Transfer Date	Nov 13, 2018
Prior Transfer Doc	0000093946
Record Updated	Oct 29, 2026

April 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	421 ELM AVE, SAN BRUNO, CA 94066-4217
Transaction Type	Mortgage
Record Updated	Mar 20, 2026
Title Company	TITLE CONNECTION, TITLE CONNECT INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	421 ELM AVE, SAN BRUNO, CA 94066-4217

Mortgage

Document Number	0000057904
Date	Apr 12, 2021
Instrument	2021-057904

Lender

Name	LOANDEPOT.COM LLC
Type	Mortgage Company
Address	SAN BRUNO, CA 94066

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Apr 1, 2051

February 2026: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SAN MATEO CA
Recording Date	Feb 12, 2026
Property Address	421 ELM AVE, SAN BRUNO, CA 94066-4217
Document Number	0000007137
Map Reference	MB 5 PG 40
Instrument Date	Feb 6, 2026
Instrument	2026-007137
Transaction Type	Transfer
Record Updated	Mar 20, 2026
Title Company	FIRSTAMERICAN TITLE COMPANY, FIRST AMERICAN TITLE COMPANY

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
Address	421 ELM AVE, SAN BRUNO, CA 94066-4217

Mortgage

Document Number	0000007138
Date	Feb 12, 2026
Instrument	2026-007138

Lender

Name	STAR ONE CU
Type	Credit Union

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Mar 1, 2056

December 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	SAN MATEO CA
Recording Date	Dec 3, 2018
Property Address	421 ELM AVE, SAN BRUNO, CA 94066-4217
Document Number	0000093946
Instrument Date	Nov 13, 2018
Instrument	93946
Transaction Type	Transfer
Record Updated	Dec 19, 2018
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	421 ELM AVE SAN BRUNO CA 940664217, SAN BRUNO, CA 94066-4217

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		$1,800,000 (+26.71%) Land $975,000 Building $825,000
2025	$16,115.00 (+7.87%) Homeowner's exemption	$1,420,548 (+4.04%) Land $710,274 Building $710,274
2023	$14,939.00 (+1.16%) Homeowner's exemption	$1,365,390 Land $682,695 Building $682,695	$1,837,170
2022	$14,767.00

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 Claims	3 (2002–2016)
Claims Outside the SFHA	2 of 3
Most Recent Claim	Mar 2016 · rainfall accumulation

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 1,064 locations within half a mile, as of December 31, 2025

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

May also be available: GeoLinks, T-Mobile, Verizon.

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