284 41st Ave, San Mateo, CA 94403 Property Records

San Mateo County property record for 284 41st Ave, San Mateo, CA 94403

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,310 sqft · built 1946
Lot Size	0.126 acres (5,470 sqft)
Owner	2 Individual Names on File
Last Sale	$2,500,000 (Aug 2025)
Tax Bill	$25,156 (2025)
Deeds & Mortgages	Mar 2026 Mortgage Jul 2021 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`042-222-360`

Property Details

APN / Parcel Number

Primary APN	`042-222-360`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Total Rooms	8 Rooms
Stories	1 Story
Building Area	2,310 sqft Living Area
1st Floor Area	1,410 sqft
Basement Area	900 sqft
Finished Basement	900 sqft
Family Room	Family Room
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1946
Effective Year Built	Effective 1946
Architectural Style	Raised Ranch
Construction Type	Wood
Roof Material	Composition Shingle
Lot Area	5,470 sqft (0.126 acres)
Lot Dimensions	84 ft deep x 63 ft wide
Garage Area	360 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Heating Fuel	Gas
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	284 41ST AVE
City	SAN MATEO
State	CA
Zip	94403-4304
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10006
Legal Description	LOT 37 BLOCK 10 SAN MATEO KNOLLS RSM 22/8 9 CITY OF SAN MATEO
Legal Subdivision	SAN MATEO KNOLLS
Legal Block	10
Legal Lot Number	37
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	2
Census Block	2003
Census Tract	607100

Owner

284 41st Ave is owned and occupied by two individuals who bought it in August 2025.

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

Owner of Record	2 Individual Names on File
Mailing Address	284 41ST AVE, SAN MATEO, CA 94403-4304
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

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

Deeds, Mortgages & Sale History

Date	Document
Mar 5, 2026	Deed of Trust, Mortgage · Conventional Mortgage GOOGAIN INC
Jul 28, 2021	Deed of Trust, Mortgage · Conventional Mortgage BANK OF AMERICA NA
Oct 14, 2020	Grant Deed, Transfer · Conventional Mortgage MUFG UNION BANK NA

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Aug 11, 2025 · Amount on File
Deed Sale	Aug 11, 2025 · Amount on File
Prior Sale	Oct 14, 2020 · Amount on File
Deed Document Number	202540931
Prior Transfer Date	Oct 12, 2012
Prior Transfer Doc	0000151532
Record Updated	Oct 29, 2026

March 2026: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	284 41ST AVE, SAN MATEO, CA 94403-4304
Transaction Type	Mortgage
Record Updated	Apr 15, 2026

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	284 41ST AVE, SAN MATEO, CA 94403-4304

Mortgage

Document Number	0000010997
Date	Mar 5, 2026
Instrument	2026-010997

Lender

Name	GOOGAIN INC
Type	Mortgage Company
Address	SUNNYVALE, CA 94086

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Mar 1, 2056

July 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	284 41ST AVE, SAN MATEO, CA 94403-4304
Transaction Type	Mortgage
Record Updated	Aug 5, 2022
Title Company	FIRST AMERICAN TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	284 41ST AVE, SAN MATEO, CA 94403-4304

Mortgage

Document Number	0000111417
Date	Jul 28, 2021
Instrument	2021-111417

Lender

Name	BANK OF AMERICA NA
Type	Bank
Address	CHARLOTTE, NC 28255

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Aug 1, 2051

October 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Oct 14, 2020
Property Address	284 41ST AVE, SAN MATEO, CA 94403-4304
Document Number	0000110612
Map Reference	MB 22 PG 8&9
Instrument Date	Oct 6, 2020
Instrument	2020-110612
Transaction Type	Transfer
Record Updated	Aug 5, 2022
Title Company	FIDELITY NATIONAL TITLE CO

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$11,468.00
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	284 41ST AVE, SAN MATEO, CA 94403-4304
Investor	Possibly a Property Investor

Mortgage

Document Number	0000110613
Date	Oct 14, 2020
Instrument	2020-110613

Lender

Name	MUFG UNION BANK NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Nov 1, 2050

Interest

Rate Type	Adjustable Rate
Rate	2.75%
Type Change Date	Nov 1, 2027
Change Frequency	Annually
Min Rate At Change	2.25%
Max Rate At Change	4.75%
Index	1-Year LIBOR
Max Rate	8.75%

Tax Assessment & Valuation

The 2025 property tax bill for 284 41st Ave was $25,156, up 2.3% from the year before.

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

Property Jurisdictions

Type	Name
State	California
County	San Mateo County
Municipality	San Mateo City
Elementary School District	San Mateo-Foster 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		$2,500,000 (+22.85%) Land $1,572,000 Building $928,000
2025	$25,156.00 (+2.31%)	$2,034,972 Land $1,082,432 Building $952,540
2024	$24,587.00 (+1.78%)
2023	$24,158.00 (+2.17%)	$1,955,952 Land $1,040,400 Building $915,552	$2,035,350
2022	$23,646.00

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

Flood

FEMA maps place 284 41st Ave in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective September 10, 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

The area around 284 41st Ave has no burnable land within ember reach, so its wildfire risk is not rated.

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	CALIFORNIA WATER SERVICE - SAN MATEO private · serves 103,536 people · EPA ID CA4110008
Water Source	Purchased surface water from SAN FRANCISCO REGIONAL WATER SYSTEM
Last State Inspection	Mar 2025
Lead	4 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 785 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Sonic Telecom Fiber	10,000 / 10,000
AT&T Fiber · Fixed Wireless, DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Astound Broadband Cable	1,500 / 50
Verizon Fixed Wireless	300 / 20
Etheric Networks Fixed Wireless	250 / 100

May also be available: GeoLinks, T-Mobile.

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