556 31st Ave, San Mateo, CA 94403 Property Records

San Mateo County property record for 556 31st Ave, San Mateo, CA 94403

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,600 sqft · built 1945
Lot Size	0.128 acres (5,563 sqft)
Owner	2 Trust Names on File
Last Sale	$1,400,000 (Dec 2018)
Tax Bill	$19,282 (2025)
Deeds & Mortgages	Nov 2020 Mortgage Nov 2019 Mortgage + 2 more
Flood Zone	Zone X (minimal risk)
APN	`039-303-330`

Property Details

APN / Parcel Number

Primary APN	`039-303-330`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,600 sqft Living Area
1st Floor Area	1,110 sqft
Family Room	Family Room
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1945
Effective Year Built	Effective 1945
Architectural Style	Ranch
Exterior Material	Stucco
Roof Material	Composition Shingle
Lot Area	5,563 sqft (0.128 acres)
Lot Dimensions	111 ft deep x 50 ft wide
Garage Area	280 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	556 31ST AVE
City	SAN MATEO
State	CA
Zip	94403-3813
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10006
Legal Description	LOT 16 BLOCK 18 SAN MATEO TERRACE MAP NO 5 RSM 22/35 CITY OFSAN MATEO
Legal Subdivision	SAN MATEO TERRACE MAP NO 5
Legal Block	18
Legal Lot Number	16
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	3
Census Block	3001
Census Tract	607300

Owner

556 31st Ave is held in a trust since August 2021.

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

Owner of Record	2 Trust Names on File
Mailing Address	1142 FORDHAM WAY, MOUNTAIN VIEW, CA 94040-3031
Owner Type	Company
Vesting	Trust

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
Nov 30, 2020	Deed of Trust, Mortgage · Conventional Mortgage WINNPOINTE CORPORATION
Nov 15, 2019	Deed of Trust, Mortgage · Conventional Mortgage CITIBANK NA
Sep 29, 2021	Intrafamily Transfer, Transfer
Dec 6, 2018	Grant Deed, Transfer · ARM CITIBANK NA

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Dec 6, 2018 · Amount on File
Deed Sale	Dec 6, 2018 · Amount on File
Deed Document Number	201895159
Last Transfer Date	Aug 22, 2021
Transfer Doc	0000139091
Record Updated	Oct 29, 2026

November 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	556 31ST AVE, SAN MATEO, CA 94403-3813
Transaction Type	Mortgage
Record Updated	Oct 18, 2022
Title Company	ORANGE COAST TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	556 31ST AVE, SAN MATEO, CA 94403-3813

Mortgage

Document Number	0000135528
Date	Nov 30, 2020
Instrument	2020-135528

Lender

Name	WINNPOINTE CORPORATION
Type	Mortgage Company
Address	ORANGE, CA 92868

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	181 Months
Due	Dec 1, 2035

November 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	556 31ST AVE, SAN MATEO, CA 94403-3813
Transaction Type	Mortgage
Record Updated	Oct 18, 2022
Title Company	FIRST AMERICAN TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000096643
Date	Nov 15, 2019
Instrument	2019-096643

Lender

Name	CITIBANK NA
Type	Bank
Address	O FALLON, MO 63368

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Dec 1, 2049

Interest

Rate Type	Adjustable Rate
Rate	2.75%
Type Change Date	Dec 1, 2029
Change Frequency	Annually
Min Rate At Change	2.25%
Max Rate At Change	7.75%
Index	1-Year LIBOR
Max Rate	7.75%

September 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SAN MATEO CA
Recording Date	Sep 29, 2021
Property Address	556 31ST AVE, SAN MATEO, CA 94403-3813
Document Number	0000139091
Map Reference	MB 22 PG 35
Instrument Date	Aug 22, 2021
Instrument	2021-139091
Transaction Type	Transfer
Record Updated	Jun 7, 2023

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
Relationship	Family Trust
Address	1142 FORDHAM WAY, MOUNTAIN VIEW, CA 94040-3031

December 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Dec 6, 2018
Property Address	556 31ST AVE, SAN MATEO, CA 94403-3813
Document Number	0000095159
Map Reference	MB22 PG35
Instrument Date	Nov 27, 2018
Instrument	2018-095159
Transaction Type	Transfer
Record Updated	Oct 18, 2022
Title Company	CHICAGO TITLE INS CO

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	00000

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	556 31ST AVE, SAN MATEO, CA 94403-3813

Mortgage

Document Number	0000095161
Date	Dec 6, 2018
Instrument	2018-095161

Lender

Name	CITIBANK NA
Type	Bank

Agreement

Type	ARM
Amount	Amount on Record
Term	361 Months
Due	Jan 1, 2049

Interest

Rate Type	Adjustable Rate
Rate	3.87%
Type Change Date	Jan 1, 2026
Change Frequency	Annually
Min Rate At Change	2.25%
Max Rate At Change	8.87%
Index	1-Year LIBOR
Max Rate	8.87%

Tax Assessment & Valuation

The 2025 property tax bill for 556 31st Ave was $19,282.

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		$1,592,955 (+2%) Land $1,365,392 Building $227,563
2025	$19,282.00	$1,561,721 Land $1,338,620 Building $223,101
2023	$18,616.00 (+1.14%)	$1,501,080 Land $1,286,641 Building $214,439	$1,650,240
2022	$18,406.00

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

Flood

FEMA maps place 556 31st Ave in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 2009.

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

The area around 556 31st 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 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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