503 Alta Ave, San Mateo, CA 94403 Property Records

San Mateo County property record for 503 Alta Ave, San Mateo, CA 94403

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,730 sqft · built 1948
Lot Size	0.161 acres (7,000 sqft)
Owner	2 Company Names on Record
Last Sale	$1,500,000 (Nov 2021)
Tax Bill	$15,467 (2025)
Deeds & Mortgages	Nov 2021 Sale Sep 2020 Transfer + 1 more
Flood Zone	Zone X (minimal risk)
APN	`039-116-010`

Property Details

APN / Parcel Number

Primary APN	`039-116-010`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,730 sqft Living Area
1st Floor Area	1,410 sqft
Family Room	Family Room

Exterior

Year Built	Built 1948
Effective Year Built	Effective 1948
Lot Area	7,000 sqft (0.161 acres)
Lot Dimensions	100 ft deep x 70 ft wide
View / Lot	Corner
Garage Area	440 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	503 ALTA AVE
City	SAN MATEO
State	CA
Zip	94403-1224
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10006
Legal Description	LOT 1 BLOCK 5 MAYWOOD NO 2 RSM 25/21
Legal Subdivision	MAYWOOD NO 2
Legal Block	5
Legal Lot Number	1
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	2
Census Block	2010
Census Tract	606700

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 Company Names on Record
Mailing Address	PO BOX 355, SAN MATEO, CA 94401-0355
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Nov 16, 2021	Grant Deed, Transfer FIRST AMERICAN TITLE COMPANY
Sep 18, 2020	Quit Claim Deed, Transfer ATTORNEY ONLY
May 27, 2020	Affidavit of Death, Transfer ATTORNEY ONLY

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Nov 16, 2021 · Amount on Record
Deed Sale	Nov 16, 2021 · Amount on Record
Deed Document Number	2021159060
Prior Transfer Date	Jul 21, 2020
Prior Transfer Doc	0000097681
Record Updated	Oct 29, 2026

November 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Nov 16, 2021
Property Address	2314 ALAMEDA DE LAS PULGAS, SAN MATEO, CA 94403-1214
Document Number	0000159060
Map Reference	MB 25 PG 21
Instrument Date	Nov 4, 2021
Instrument	2021-159060
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	FIRST AMERICAN TITLE COMPANY

Transaction

Amount	Amount Recorded
Tax	$9,150.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	PO BOX 355, SAN MATEO, CA 94401-0355

September 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	SAN MATEO CA
Recording Date	Sep 18, 2020
Property Address	2314 ALAMEDA DE LAS PULGAS, SAN MATEO, CA 94403-1214
Document Number	0000097681
Instrument Date	Jul 21, 2020
Instrument	97681
Transaction Type	Transfer
Record Updated	Oct 22, 2020
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	2314 ALAMEDA DE LAS PULGAS SAN MATEO CA 944031214, SAN MATEO, CA 94403-1214

May 2020: Affidavit of Death, Transfer

Document Type	Affidavit of Death
Jurisdiction	SAN MATEO CA
Recording Date	May 27, 2020
Property Address	2314 ALAMEDA DE LAS PULGAS, SAN MATEO, CA 94403-1214
Document Number	0000047659
Instrument Date	Feb 13, 2020
Instrument	47659
Transaction Type	Transfer
Record Updated	Jun 23, 2020
Title Company	ATTORNEY ONLY

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	333 26TH AVE SAN MATEO CA 944032303, SAN MATEO, CA 94403-2303

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		$1,272,827 (+2.5%) Land $975,270 Building $297,557
2025	$15,467.00 (+9.99%)	$1,241,785 (+9.29%) Land $956,148 Building $285,637
2023	$14,062.00 (+1.47%)	$1,136,280 Land $919,020 Building $217,260	$1,606,500
2022	$13,858.00

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	1 in force
Nearby Flood Claims	1 (1979)
Most Recent Claim	Apr 1979 · 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 799 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

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

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