1. Home
  2. California
  3. San Mateo County
  4. San Mateo
  5. S B St

601 S B St, San Mateo, CA 94401 Property Records

San Mateo County property record for 601 S B St, San Mateo, CA 94401

Property Summary

Property TypeCommercial Office
Details2,858 sqft · built 1969
Lot Size0.164 acres (7,128 sqft)
Owner2 Individual Names on Record
Last Sale$2,500,000 (Nov 2018)
Tax Bill$32,703 (2025)
Deeds & MortgagesNov 2018 Sale & Mortgage
Flood ZoneZone X (minimal risk)
APN034-193-050

Property Details

APN / Parcel Number

Primary APN034-193-050

Interior

Stories1 Story
Building Area2,858 sqft Gross Area
1st Floor Area2,858 sqft

Exterior

Year BuiltBuilt 1969
Effective Year BuiltEffective 1969
Lot Area7,128 sqft (0.164 acres)
Lot Dimensions70 ft deep x 101 ft wide
Parking Spaces11 Parking Spaces

Location & Zoning

Street Address601 S B ST
CitySAN MATEO
StateCA
Zip94401-4120
Property CategoryCommercial
Property TypeCommercial > Office > Commercial Office
Local Zoning CodeCL00C2
Legal Description70 FT X 101 FT 10 IN COR OF B ST & 6TH AVE PTN OF LOTS 1 2 BLOCK 7 HAYWARD ADDITION TO CITY OF SAN MATEO RSM D/61
Legal SubdivisionHAYWARD ADDITION TO CITY OF SAN MATEO
Legal Block7
Legal Lot Number1
JurisdictionSAN MATEO CA
Township / Civil DivisionSAN MATEO
Census Block Group2
Census Block2019
Census Tract606300

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 Individual Names on Record
Mailing Address306 6TH AVE, B, SAN MATEO, CA 94401-4117
Owner TypeIndividual
VestingCommunity Property

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleNov 27, 2018 · Amount on Record
Deed SaleNov 27, 2018 · Amount on Record
Prior SaleDec 20, 2007 · Amount on Record
Deed Document Number201891928
Prior Transfer DateOct 7, 1999
Prior Transfer Doc0000171275
Record UpdatedOct 29, 2026

November 2018: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionSAN MATEO CA
Recording DateNov 27, 2018
Property Address601 S B ST, SAN MATEO, CA 94401-4120
Document Number0000091928
Instrument DateSep 10, 2018
Instrument91928
Transaction TypeTransfer
Record UpdatedDec 12, 2018
Title CompanyNORTH AMERICAN TITLE

Transaction

AmountAmount Recorded
DownpaymentDownpayment on Record
Loan-to-Value (LTV)LTV on Record
Tax$2,750.00
Amount AccuracyFull Value
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipCommunity Property
Address306 6TH AVE #B SAN MATEO CA 944014117, B, SAN MATEO, CA 94401-4117

Mortgage

Document Number91929
DateNov 27, 2018
Instrument91929
Lender
NameCATOMER FRANK T TRUST (PT)
Address764 EDGEWOOD RD, SAN MATEO, CA 94402-1051
Agreement
AmountAmount Recorded

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$2,844,569 (+2%) Land $2,434,953 Building $409,616
2025$32,703.00 (+3.84%)$2,788,794 (+4.04%) Land $2,387,209 Building $401,585
2023$31,493.00 (+12.83%)$2,680,503 Land $2,294,511 Building $385,992
2022$27,911.00

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

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 RiskLow
lower than 98% of the US · lower than 98.4% of California
Wildfire LikelihoodUnder 0.01% annual chance
ExposureNone
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 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 570 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Xfinity
Cable · Fiber in parts of the area		2,000 / 250
Astound Broadband
Cable · Fiber in parts of the area		1,500 / 50
Verizon
Fixed Wireless		1,000 / 75
Etheric Networks
Fixed Wireless · Fiber in parts of the area		250 / 100
T-Mobile
Fixed Wireless		100 / 20

May also be available: AT&T, GeoLinks, Sonic Telecom, Unwired.

Nearby Properties on S B St

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

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