340 Sylvan Ave, San Mateo, CA 94403 Property Records

San Mateo County property record for 340 Sylvan Ave, San Mateo, CA 94403

Property Summary

Property Type	Single Family Home
Details	4 bd · 3.5 ba · 2,974 sqft · built 1941
Lot Size	0.278 acres (12,100 sqft)
Owner	2 Company Names on Record
Tax Bill	$11,978 (2025)
Deeds & Mortgages	Sep 2022 Line of Credit Feb 2022 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`039-314-240`

Property Details

APN / Parcel Number

Primary APN	`039-314-240`

Interior

Bedrooms	4 Beds
Full Baths	3.5 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Stories	1 Story
Building Area	2,974 sqft Living Area
Gross Area	4,054 sqft
1st Floor Area	1,290 sqft
2nd Floor Area	1,684 sqft
Basement Area	1,080 sqft
Family Room	Family Room
Fireplaces	2 Fireplaces
Fireplace	Fireplace

Exterior

Year Built	Built 1941
Effective Year Built	Effective 1941
Architectural Style	Ranch
Exterior Material	Wood
Roof Material	Composition Shingle
Lot Area	12,100 sqft (0.278 acres)
Lot Dimensions	110 ft deep x 110 ft wide
Garage Type	Basement
Garage Area	1,080 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

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

Location & Zoning

Street Address	340 SYLVAN AVE
City	SAN MATEO
State	CA
Zip	94403-3332
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1000B
Legal Description	BEING LOT 15 BLK 11 SAN MATEO TERR NO 5 RSM 22/35 & ADJ PTN OF LOT 37 SUB OF LOTS 14 THRU 17 OF BERESFORD PARK RSM D/14
Legal Subdivision	BERESFORD PARK
Legal Block	11
Legal Lot Number	15,37
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	2
Census Block	2010
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	2 Company Names on Record
Mailing Address	340 SYLVAN AVE, SAN MATEO, CA 94403-3332
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Sep 23, 2022	Deed of Trust, Mortgage · Line of Credit NAVY FCU
Feb 7, 2022	Deed of Trust, Mortgage · Conventional Mortgage NAVY FCU
Apr 25, 2017	Deed of Trust, Mortgage CALIBER HM LOANS

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Transfer Date	Dec 7, 2007
Transfer Doc	0000176744
Record Updated	Sep 20, 2026

September 2022: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	340 SYLVAN AVE, SAN MATEO, CA 94403-3332
Transaction Type	Mortgage
Record Updated	Oct 18, 2022

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	340 SYLVAN AVE, SAN MATEO, CA 94403-3332

Mortgage

Document Number	0000069000
Date	Sep 23, 2022
Instrument	2022-069000

Lender

Name	NAVY FCU
Type	Credit Union
Address	VIENNA, VA 22180

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	480 Months
Due	Sep 1, 2062

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

February 2022: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	340 SYLVAN AVE, SAN MATEO, CA 94403-3332
Transaction Type	Mortgage
Record Updated	Oct 18, 2022
Title Company	NAVY FEDERAL TITLE OF CA INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	340 SYLVAN AVE, SAN MATEO, CA 94403-3332

Mortgage

Document Number	0000011096
Date	Feb 7, 2022
Instrument	2022-011096

Lender

Name	NAVY FCU
Type	Credit Union
Address	VIENNA, VA 22180

Agreement

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

April 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	340 SYLVAN AVE, SAN MATEO, CA 94403-3332
Document Number	0000038146
Instrument Date	Apr 25, 2017
Transaction Type	Mortgage
Record Updated	May 18, 2017
Title Company	NORTH AMERICAN TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	340 SYLVAN AVE SAN MATEO CA 944033332, SAN MATEO, CA 94403-3332

Mortgage

Document Number	0000038146
Date	May 2, 2017
Instrument	38146

Lender

Name	CALIBER HM LOANS
Type	Funding / Finance Company
Address	3701 REGENT BLVD # 180, IRVING, TX 75063-2312

Agreement

Amount	Amount Recorded
Term	360 Months
Due	May 1, 2047

Interest

Rate Type	Adjustable Rate
Rate	6.62%

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		$772,890 (+2%) Land $281,127 Building $491,763
2025	$11,978.00 (+13.72%)	$757,737 (+4.04%) Land $275,615 Building $482,122
2023	$10,533.00 (-5.54%)	$728,317 Land $264,913 Building $463,404	$3,042,810
2022	$11,151.00

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	2 in force
Nearby Flood Claims	4 (1998–2022)
Claims Outside the SFHA	4 of 4
Most Recent Claim	Dec 2022 · 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	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 716 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, GeoLinks, T-Mobile.

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