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101 42nd Ave, San Mateo, CA 94403 Property Records

San Mateo County property record for 101 42nd Ave, San Mateo, CA 94403

Property Summary

Property TypeDuplex
Details4 bd · 2 ba · 2,850 sqft · built 1947
Lot Size0.117 acres (5,076 sqft)
Owner2 Company Names on Record
Last Sale$755,000 (Feb 2003)
Tax Bill$16,025 (2025)
Deeds & MortgagesMar 2021 Transfer
Jan 2021 Transfer
Flood ZoneZone X (minimal risk)
APN042-261-130

Property Details

APN / Parcel Number

Primary APN042-261-130

Interior

Bedrooms4 Beds
Full Baths2 Baths
Total Rooms8 Rooms
Units2 Units
Stories2 Stories
Building Area2,850 sqft Living Area

Exterior

Year BuiltBuilt 1947
Effective Year BuiltEffective 1947
Architectural StyleDuplex Single
Lot Area5,076 sqft (0.117 acres)
Lot Dimensions80 ft deep x 65 ft wide
TerrainAbove Road/Slope
View / LotCorner
Parking Spaces2 Parking Spaces

Location & Zoning

Street Address101 42ND AVE
CitySAN MATEO
StateCA
Zip94403-5110
Property CategoryResidential
Property TypeResidential > Multi-Unit > Duplex
Local Zoning CodeR20000
Legal DescriptionLOT 1 BLOCK 22 SAN MATEO KNOLLS MAP NO 2 RSM 24/61 62 CITY OF SAN MATEO
Legal SubdivisionSAN MATEO KNOLLS MAP NO 2
Legal Block22
Legal Lot Number1
JurisdictionSAN MATEO CA
Township / Civil DivisionSAN MATEO
Census Block Group2
Census Block2026
Census Tract607200

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 Record2 Company Names on Record
Mailing Address23 RIDGECREST TER, SAN MATEO, CA 94402-3997
Owner TypeCompany
VestingTrust

Deeds, Mortgages & Sale History

DateDocument
Mar 5, 2021Intrafamily Transfer, Transfer
Jan 15, 2021Quit Claim Deed, Transfer
NOT AVAILABLE

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleFeb 21, 2003 · Amount on Record
Deed SaleFeb 21, 2003 · Amount on Record
Deed Document Number200345103
Last Transfer DateFeb 26, 2021
Transfer Doc0000036478
Record UpdatedOct 29, 2026

March 2021: Intrafamily Transfer, Transfer

Document TypeIntrafamily Transfer
JurisdictionSAN MATEO CA
Recording DateMar 5, 2021
Property Address101 42ND AVE, SAN MATEO, CA 94403-5110
Document Number0000036478
Map ReferenceMB 24 PG 60-62
Instrument DateFeb 26, 2021
Instrument2021-036478
Transaction TypeTransfer
Record UpdatedJun 7, 2023

Transaction

Tax$0.00
Amount AccuracyTransfer Tax Exempt
Additional
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipLiving Trust
Address23 RIDGECREST TER, SAN MATEO, CA 94402-3997

January 2021: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionSAN MATEO CA
Recording DateJan 15, 2021
Property Address101 42ND AVE, SAN MATEO, CA 94403-5110
Document Number0000007443
Instrument DateJan 14, 2021
Instrument7443
Transaction TypeTransfer
Record UpdatedFeb 17, 2021
Title CompanyNOT AVAILABLE

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address23 RIDGECREST TER SAN MATEO CA 944023997, SAN MATEO, CA 94402-3997

Tax Assessment & Valuation

Source: San Mateo County assessment roll, as of July 15, 2026

Property Jurisdictions

TypeName
StateCalifornia
CountySan Mateo County
MunicipalitySan Mateo City
Elementary School DistrictSan Mateo-Foster City Elementary School District (KG - 08)
Secondary School DistrictSan Mateo Union High School District (09 - 12)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$1,115,343 (+2%) Land $738,641 Building $376,702
2025$16,025.00 (+5.06%)$1,093,474 (+4.04%) Land $724,158 Building $369,316
2023$15,253.00 (+2.25%)$1,051,015 Land $696,039 Building $354,976
2022$14,918.00

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

Source: FEMA National Flood Hazard Layer, effective September 10, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it
Nearby Flood Claims1 (1986)
Claims Outside the SFHA1 of 1
Most Recent ClaimFeb 1986 · Severe Storms & Flooding

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 RiskNot 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 SystemCALIFORNIA WATER SERVICE - SAN MATEO
private · serves 103,536 people · EPA ID CA4110008
Water SourcePurchased surface water from SAN FRANCISCO REGIONAL WATER SYSTEM
Last State InspectionMar 2025
Lead4 ppb (2023–2025)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
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 734 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
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
Verizon
Fixed Wireless		300 / 20
Starlink
Satellite		280 / 30
Etheric Networks
Fixed Wireless		250 / 100
T-Mobile
Fixed Wireless		100 / 20

May also be available: GeoLinks, Sonic Telecom.

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