1. Home
  2. California
  3. San Mateo County
  4. San Mateo
  5. Williams Pl

409 Williams Pl, San Mateo, CA 94401 Property Records

San Mateo County property record for 409 Williams Pl, San Mateo, CA 94401

Property Summary

Property TypeSingle Family Home
Details2 bd · 1 ba · 900 sqft · built 1929
Lot Size0.056 acres (2,426 sqft)
Owner2 Company Names on Record
Last Sale$257,000 (Sep 1995)
Tax Bill$7,288 (2025)
Deeds & MortgagesMay 2026 Transfer
Aug 2018 Line of Credit
+ 1 more
Flood ZoneZone X (minimal risk)
APN032-173-140

Property Details

APN / Parcel Number

Primary APN032-173-140

Interior

Bedrooms2 Beds
Full Baths1 Bath
Total Rooms5 Rooms
Stories1 Story
Building Area900 sqft Living Area
1st Floor Area790 sqft
Family RoomFamily Room
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1929
Effective Year BuiltEffective 1929
Architectural StyleBungalow
Exterior MaterialStucco
Construction TypeFrame
Roof MaterialComposition Shingle
Lot Area2,426 sqft (0.056 acres)
Lot Dimensions59 ft deep x 38 ft wide
Garage Area130 sqft
Parking Spaces1 Parking Space

Utilities, Heating & Cooling

Cooling SystemCentral
Heating SystemCentral
SewerMunicipal
Water SourceCommercial

Location & Zoning

Street Address409 WILLIAMS PL
CitySAN MATEO
StateCA
Zip94401-2419
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeR10006
Legal DescriptionLOT 23 ALBERT A MEYER SUB POR BLK 8 OF WESTERN ADD SAN MATEO RSM 16/7
Legal SubdivisionWESTERN ADD SAN MATEO
Legal Block8
Legal Lot Number23
JurisdictionSAN MATEO CA
Township / Civil DivisionSAN MATEO
Census Block Group3
Census Block3003
Census Tract605901

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 Record2 Company Names on Record
Mailing Address409 WILLIAMS PL, SAN MATEO, CA 94401-2419
OccupancyOwner Occupied
Owner TypeCompany
VestingTrust

Deeds, Mortgages & Sale History

DateDocument
May 20, 2026Affidavit of Death of Trustee, Transfer
Aug 22, 2018Deed of Trust, Mortgage · Line of Credit
CITIBANK NA
Oct 27, 2020Deed of Trust, Mortgage · Conventional Mortgage
UNITED WHOLESALE MORTGAGE

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleSep 22, 1995 · Amount on Record
Deed SaleSep 22, 1995 · Amount on Record
Deed Document Number199599975
Last Transfer DateMay 19, 2009
Transfer Doc0000068413
Record UpdatedSep 20, 2026

May 2026: Affidavit of Death of Trustee, Transfer

Document TypeAffidavit of Death of Trustee
JurisdictionSAN MATEO CA
Recording DateMay 20, 2026
Property Address409 WILLIAMS PL, SAN MATEO, CA 94401-2419
Document Number0000029099
Instrument DateMay 13, 2026
Instrument202629099
Transaction TypeTransfer
Record UpdatedAug 29, 2026

Transaction

Tax$0.00
Amount AccuracyFull Amount Stated

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipTrust
Address409 WILLIAMS PL, SAN MATEO, CA 94401-2419

August 2018: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionSAN MATEO CA
Property Address409 WILLIAMS PL, SAN MATEO, CA 94401-2419
Transaction TypeMortgage
Record UpdatedAug 5, 2022

Transferred To (Grantee/Buyer)

NameVerified Name

Mortgage

Document Number0000065912
DateAug 22, 2018
Instrument2018-065912
Lender
NameCITIBANK NA
TypeBank
AddressO FALLON, MO 63368
Agreement
TypeLine of Credit
AmountAmount Recorded
Interest
Rate TypeAdjustable Rate
Change FrequencyMonthly

October 2020: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionSAN MATEO CA
Property Address409 WILLIAMS PL, SAN MATEO, CA 94401-2419
Transaction TypeMortgage
Record UpdatedAug 5, 2022
Title CompanyNEXTITLE

Transferred To (Grantee/Buyer)

NameVerified Name
Address409 WILLIAMS PL, SAN MATEO, CA 94401-2419

Mortgage

Document Number0000118247
DateOct 27, 2020
Instrument2020-118247
Lender
NameUNITED WHOLESALE MORTGAGE
TypeMortgage Company
AddressPONTIAC, MI 48341
Agreement
TypeConventional Mortgage
AmountAmount Recorded
Term181 Months
DueNov 1, 2035

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 ValueAssessed Market Value
2026$464,148 (+2%) Land $232,074 Building $232,074
2025$7,288.00 (-3.44%) Homeowner's exemption$455,048 (+4.04%) Land $227,524 Building $227,524
2023$7,548.00 (+1.56%) Homeowner's exemption$437,380 Land $218,690 Building $218,690$975,690
2022$7,432.00

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

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it

Values are read at the parcel center point; 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 694 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
Sonic Telecom
Fiber		1,000 / 1,000
Verizon
Fixed Wireless		1,000 / 75
Etheric Networks
Fixed Wireless		250 / 100

May also be available: GeoLinks, T-Mobile, Unwired.

Nearby Properties on Williams Pl

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

By searching, you agree to: Terms • Privacy • Disclosures