823 31st Ave, San Mateo, CA 94403 Property Records

San Mateo County property record for 823 31st Ave, San Mateo, CA 94403

Property Summary

Property Type	Single Family Home
Details	6 bd · 3.5 ba · 2,600 sqft · built 1951
Lot Size	0.186 acres (8,116 sqft)
Owner	2 Individual Names on Record
Last Sale	$2,430,000 (Sep 2025)
Tax Bill	$25,190 (2025)
Deeds & Mortgages	Oct 2025 Line of Credit Sep 2025 Sale + 3 more
Flood Zone	Zone X (minimal risk)
APN	`039-200-340`

Property Details

APN / Parcel Number

Primary APN	`039-200-340`

Interior

Bedrooms	6 Beds
Full Baths	3.5 Baths
Half Baths	1 Half Bath
Total Rooms	10 Rooms
Stories	1 Story
Building Area	2,600 sqft Living Area
1st Floor Area	1,560 sqft
Family Room	Family Room

Exterior

Year Built	Built 1951
Effective Year Built	Effective 1951
Exterior Material	Wood Siding
Roof Material	Wood Shingle
Lot Area	8,116 sqft (0.186 acres)
Lot Dimensions	116 ft deep x 70 ft wide
Garage Area	420 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	823 31ST AVE
City	SAN MATEO
State	CA
Zip	94403-3817
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10006
Legal Description	LOT 2 BLOCK 7 HILLSDALE UNIT NO 4A RSM 31/10 11 CITY OF SAN MATEO
Legal Subdivision	HILLSDALE UNIT NO 4A
Legal Block	7
Legal Lot Number	2
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	1
Census Block	1011
Census Tract	607300

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	2 Individual Names on Record
Mailing Address	823 31ST AVE, SAN MATEO, CA 94403-3817
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

Deeds, Mortgages & Sale History

Date	Document
Oct 15, 2025	Deed of Trust, Mortgage · Line of Credit THIRD FSLA OF CLEVELAND
Sep 9, 2025	Grant Deed, Transfer STEWART TITLE, STEWART TITLE OF CA INC
Jun 29, 2021	Grant Deed, Transfer NORTH AMERICAN TITLE COMPANY, NORTH AMERICAN TITLE CO INC
Sep 16, 2020	Grant Deed, Transfer · Conventional Mortgage WELLS FARGO BANK NA
Feb 21, 2018	Quit Claim Deed, Transfer Quitclaim

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 9, 2025 · Amount on Record
Deed Sale	Sep 9, 2025 · Amount on Record
Prior Sale	Sep 16, 2020 · Amount on Record
Deed Document Number	202546579
Prior Transfer Date	Dec 8, 2017
Prior Transfer Doc	0000012095
Record Updated	Oct 29, 2026

October 2025: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	823 31ST AVE, SAN MATEO, CA 94403-3817
Transaction Type	Mortgage
Record Updated	Nov 12, 2025
Title Company	UNKNOWN, TITLE365 COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	823 31ST AVE, SAN MATEO, CA 94403-3817

Mortgage

Document Number	0000054353
Date	Oct 15, 2025
Instrument	2025-054353

Lender

Name	THIRD FSLA OF CLEVELAND
Type	Bank
Address	CLEVELAND, OH 44105

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	360 Months
Due	Oct 9, 2055

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

September 2025: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Sep 9, 2025
Property Address	823 31ST AVE, SAN MATEO, CA 94403-3817
Document Number	0000046579
Map Reference	MB 31 PG 10&11
Instrument Date	Sep 2, 2025
Instrument	2025-046579
Transaction Type	Transfer
Record Updated	Oct 3, 2025
Title Company	STEWART TITLE, STEWART TITLE OF CA INC

Transaction

Amount	Amount Recorded
Tax	$14,823.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	823 31ST AVE, SAN MATEO, CA 94403-3817

June 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Jun 29, 2021
Property Address	823 31ST AVE, SAN MATEO, CA 94403-3817
Document Number	0000098417
Map Reference	MB 31 PG 10&1
Instrument Date	Jun 23, 2021
Instrument	2021-098417
Transaction Type	Transfer
Record Updated	Jul 25, 2022
Title Company	NORTH AMERICAN TITLE COMPANY, NORTH AMERICAN TITLE CO INC

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	823 31ST AVE, SAN MATEO, CA 94403-3817

September 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Sep 16, 2020
Property Address	823 31ST AVE, SAN MATEO, CA 94403-3817
Document Number	0000096472
Map Reference	MB 31 PG 10&11
Instrument Date	Sep 4, 2020
Instrument	2020-096472
Transaction Type	Transfer
Record Updated	Jul 25, 2022
Title Company	NORTH AMERICAN TITLE CO INC

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$11,669.30
Amount Accuracy	Rounded by County

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Family Trust
Address	823 31ST AVE, SAN MATEO, CA 94403-3817

Mortgage

Document Number	0000096473
Date	Sep 16, 2020
Instrument	2020-096473

Lender

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

Agreement

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

February 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	SAN MATEO CA
Recording Date	Feb 21, 2018
Property Address	823 31ST AVE, SAN MATEO, CA 94403-3817
Document Number	0000012095
Instrument Date	Dec 8, 2017
Instrument	12095
Transaction Type	Transfer
Record Updated	Mar 12, 2018

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	823 31ST AVE SAN MATEO CA 944033817, SAN MATEO, CA 94403-3817

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		$2,430,000 (+17.36%) Land $1,587,000 Building $843,000
2025	$25,190.00 (+1.68%) Homeowner's exemption	$2,070,527 (+4.04%) Land $1,298,917 Building $771,610
2024	$24,774.00 (+2.73%)
2023	$24,115.00 (+1.18%) Homeowner's exemption	$1,990,129 Land $1,248,480 Building $741,649	$2,102,130
2022	$23,834.00

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	4 in force
Nearby Flood Claims	3 (1983–2016)
Claims Outside the SFHA	3 of 3
Most Recent Claim	Mar 2016 · other causes

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	Low lower than 99.1% of the US · lower than 99.2% of California
Wildfire Likelihood	Under 0.01% annual chance
Exposure	None beyond 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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