1. Home
  2. California
  3. Sonoma County
  4. Santa Rosa
  5. 4th St

523 4th St, Santa Rosa, CA 95401 Property Records

Sonoma County property record for 523 4th St, Santa Rosa, CA 95401

Property Summary

Property TypeMixed Use Store/Office
Details17,473 sqft · built 1977
Lot Size0.184 acres (8,000 sqft)
Owner2 Individual Names on Record
Last Sale$3,425,000 (Dec 2018)
Tax Bill$46,661 (2025)
Deeds & MortgagesJul 2020 Mortgage
Dec 2018 Sale & Mortgage
Flood ZoneZone X (minimal risk)
APN010-053-033-000

Property Details

APN / Parcel Number

Primary APN010-053-033-000
Alternative APN
  • 010-053-033

Interior

Stories2 Stories
Building Area17,473 sqft Gross Area

Exterior

Year BuiltBuilt 1977
Effective Year BuiltEffective 1977
Architectural StyleCustom Design
Fire ResistanceMasonry Walls, Wood Interior
Lot Area8,000 sqft (0.184 acres)

Utilities, Heating & Cooling

Cooling SystemHVAC
Heating SystemCentral

Location & Zoning

Old Parcel Number010-053-033
Street Address523 4TH ST
CitySANTA ROSA
StateCA
Zip95401-6323
Property CategoryCommercial
Property TypeCommercial > Retail > Mixed Use Store/Office
Local Zoning CodeCITYSR
Legal Description78 FORM 10-053-15 C/W 16 & 17
Legal SubdivisionSANTA ROSA
Legal Block1
Legal Lot Number394
JurisdictionSONOMA CA
Township / Civil DivisionSANTA ROSA
Census Block Group1
Census Block1033
Census Tract152000

Owner

Source: Sonoma County records, as of September 1, 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 Individual Names on Record
Mailing Address3926 MISSION ST, SAN FRANCISCO, CA 94112-1015
Owner TypeIndividual
VestingCommunity Property

Deeds, Mortgages & Sale History

DateDocument
Jul 31, 2020Deed of Trust, Mortgage · Commercial Mortgage
BOSTON PRIVATE BANK & TRUST COMPANY
Dec 26, 2018Grant Deed, Transfer · Commercial Mortgage
BOSTON PRIVATE BANK & TRUST COMPANY

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleDec 26, 2018 · Amount on Record
Deed SaleDec 26, 2018 · Amount on Record
Prior SaleJan 5, 2012 · Amount on Record
Deed Document Number201887518
Prior Transfer DateApr 23, 1997
Prior Transfer Doc0000040428
Record UpdatedOct 29, 2026

July 2020: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionSONOMA CA
Property Address523 4TH ST, SANTA ROSA, CA 95401-6323
Transaction TypeMortgage
Record UpdatedFeb 5, 2021

Transferred To (Grantee/Buyer)

NameVerified Name

Mortgage

Document Number0000064063
DateJul 31, 2020
Instrument2020064063
Lender
NameBOSTON PRIVATE BANK & TRUST COMPANY
TypeBank
AddressTRIPOLI, WI 54564
Agreement
TypeCommercial Mortgage
AmountAmount Recorded
Term57 Months
DueApr 29, 2025

December 2018: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionSONOMA CA
Recording DateDec 26, 2018
Property Address523 4TH ST, SANTA ROSA, CA 95401-6323
Document Number0000087518
Map ReferenceLB 9 PG 1
Instrument DateDec 19, 2018
Instrument2018087518
Transaction TypeTransfer
Record UpdatedAug 19, 2021
Title CompanyFIRST AMERICAN TITLE CO

Transaction

AmountAmount Recorded
DownpaymentDownpayment on Record
Loan-to-Value (LTV)LTV on Record
Tax$0.00
Amount AccuracyRounded by County
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name
Address00000

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipCommunity Property with Right of Survivorship
Address3926 MISSION ST, SAN FRANCISCO, CA 94112-1015

Mortgage

Document Number0000087519
DateDec 26, 2018
Instrument2018087519
Lender
NameBOSTON PRIVATE BANK & TRUST COMPANY
TypeBank
Agreement
TypeCommercial Mortgage
AmountAmount Recorded

Tax Assessment & Valuation

Source: Sonoma County assessment roll, as of September 1, 2026

Property Jurisdictions

TypeName
StateCalifornia
CountySonoma County
MunicipalitySanta Rosa City
Elementary School DistrictSanta Rosa Elementary School District (KG - 06)
Secondary School DistrictSanta Rosa High School District (07 - 12)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$3,897,060 (+2%) Land $972,841 Building $2,924,219
2025$46,661.00 (+3.71%)$3,820,648 (+4.04%) Land $953,766 Building $2,866,882
2023$44,992.00 (+6.63%)$3,672,289 Land $916,731 Building $2,755,558
2022$42,195.00

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

Flood

Source: FEMA National Flood Hazard Layer, effective February 15, 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 Policies1 in force

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 SystemCITY OF SANTA ROSA
serves 178,452 people · EPA ID CA4910009
Water SourceGroundwater
Last State InspectionOct 2023
Lead1 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 404 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Xfinity
Cable		2,000 / 250
T-Mobile
Fixed Wireless		100 / 20
AT&T
Fixed Wireless · DSL · Fiber in parts of the area		100 / 20

May also be available: GeoLinks, Sonic Telecom, Verizon.

Nearby Properties on 4th St

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

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