520 Sylvan Ave, San Mateo, CA 94403 Property Records

San Mateo County property record for 520 Sylvan Ave, San Mateo, CA 94403

Property Summary

Property Type	Single Family Home
Details	3 bd · 1 ba · 1,470 sqft · built 1945
Lot Size	0.125 acres (5,443 sqft)
Owner	Company Name on Record
Last Sale	$310,000 (May 1996)
Tax Bill	$3,712 (2025)
Deeds & Mortgages	Mar 2021 Mortgage Nov 2018 Line of Credit + 3 more
Flood Zone	Zone X (minimal risk)
APN	`039-302-240`

Property Details

APN / Parcel Number

Primary APN	`039-302-240`

Interior

Bedrooms	3 Beds
Full Baths	1 Bath
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,470 sqft Living Area
1st Floor Area	1,190 sqft
Family Room	Family Room

Exterior

Year Built	Built 1945
Effective Year Built	Effective 1945
Lot Area	5,443 sqft (0.125 acres)
Lot Dimensions	109 ft deep x 50 ft wide
Garage Area	290 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	520 SYLVAN AVE
City	SAN MATEO
State	CA
Zip	94403-3214
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10006
Legal Description	LOT 22 BLOCK 17 SAN MATEO TERRACE MAP NO 5 RSM 22/35 CITY OFSAN MATEO
Legal Subdivision	SAN MATEO TERRACE MAP NO 5
Legal Block	17
Legal Lot Number	22
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	3
Census Block	3000
Census Tract	607300

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	Company Name on Record
Mailing Address	520 SYLVAN AVE, SAN MATEO, CA 94403-3214
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Mar 8, 2021	Deed of Trust, Mortgage · Conventional Mortgage FREMONT BANK
Nov 16, 2018	Deed of Trust, Mortgage · Line of Credit WELLS FARGO BANK NA
May 22, 2020	Deed of Trust, Mortgage · Conventional Mortgage FREMONT BANK
Jun 29, 2020	Deed of Trust, Mortgage · Line of Credit FREMONT BANK
Jul 29, 2020	Quit Claim Deed, Transfer ATTORNEY ONLY

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	May 1, 1996 · Amount on Record
Deed Sale	May 1, 1996 · Amount on Record
Deed Document Number	199652801
Prior Transfer Date	Apr 12, 1996
Prior Transfer Doc	0000052799
Record Updated	Oct 29, 2026

March 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	520 SYLVAN AVE, SAN MATEO, CA 94403-3214
Transaction Type	Mortgage
Record Updated	Jun 8, 2026
Title Company	FIDELITY NATIONAL TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	520 SYLVAN AVE, SAN MATEO, CA 94403-3214

Mortgage

Document Number	0000037522
Date	Mar 8, 2021
Instrument	2021-037522

Lender

Name	FREMONT BANK
Type	Bank
Address	LIVERMORE, CA 94551

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Apr 1, 2051

November 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	520 SYLVAN AVE, SAN MATEO, CA 94403-3214
Transaction Type	Mortgage
Record Updated	Oct 18, 2022

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000089343
Date	Nov 16, 2018
Instrument	2018-089343

Lender

Name	WELLS FARGO BANK NA
Type	Bank
Address	SIOUX FALLS, SD 57104

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	361 Months
Due	Dec 5, 2048

May 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	520 SYLVAN AVE, SAN MATEO, CA 94403-3214
Transaction Type	Mortgage
Record Updated	Oct 18, 2022
Title Company	FIDELITY NATIONAL TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000046820
Date	May 22, 2020
Instrument	2020-046820

Lender

Name	FREMONT BANK
Type	Bank
Address	LIVERMORE, CA 94551

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Jun 1, 2050

June 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	520 SYLVAN AVE, SAN MATEO, CA 94403-3214
Transaction Type	Mortgage
Record Updated	Oct 18, 2022

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000060902
Date	Jun 29, 2020
Instrument	2020-060902

Lender

Name	FREMONT BANK
Type	Bank
Address	LIVERMORE, CA 94551

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	360 Months
Due	Jun 25, 2050

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

July 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	SAN MATEO CA
Recording Date	Jul 29, 2020
Property Address	520 SYLVAN AVE, SAN MATEO, CA 94403-3214
Document Number	0000073821
Instrument Date	Jul 17, 2020
Instrument	73821
Transaction Type	Transfer
Record Updated	Aug 25, 2020
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	20 SYLVAN AVE SAN MATEO CA 94403, SAN MATEO, CA 94403

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 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		$121,644 (+2%) Land $37,491 Building $84,153
2025	$3,712.00 (+14.71%) Homeowner's exemption	$119,259 (+4.04%) Land $36,756 Building $82,503
2023	$3,236.00 (-0.09%) Homeowner's exemption	$114,630 Land $35,330 Building $79,300	$1,445,400
2022	$3,239.00

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

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	2 in force
Nearby Flood Claims	2 (2009–2017)
Claims Outside the SFHA	2 of 2
Most Recent Claim	Jan 2017 · Severe Winter Storms, Flooding, 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	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 732 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 · Fiber in parts of the area	1,500 / 50

May also be available: Etheric Networks, T-Mobile.

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