320 4th St, Petaluma, CA 94952 Property Records

Sonoma County property record for 320 4th St, Petaluma, CA 94952

Property Summary

Property Type	Quadplex
Details	5 bd · 2.5 ba · 3,171 sqft · built 1878
Lot Size	0.201 acres (8,740 sqft)
Owner	2 Individual Names on Record
Last Sale	$285,000 (Apr 1993)
Tax Bill	$5,852 (2025)
Deeds & Mortgages	May 2018 Transfer
Flood Zone	Zone X (minimal risk)
APN	`008-114-006-000`

Property Details

APN / Parcel Number

Primary APN	`008-114-006-000`
Alternative APN	`008-114-006`

Interior

Bedrooms	5 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	7 Rooms
Units	3 Units
Stories	2 Stories
Building Area	3,171 sqft Living Area

Exterior

Year Built	Built 1878
Effective Year Built	Effective 1915
Construction Type	Wood
Lot Area	8,740 sqft (0.201 acres)
Garage Type	Detached
Garage Area	478 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	None

Location & Zoning

Street Address	320 4TH ST
City	PETALUMA
State	CA
Zip	94952-5174
Property Category	Residential
Property Type	Residential > Multi-Unit > Quadplex
Local Zoning Code	CITYPE
Legal Description	LOT 52
Legal Subdivision	PETALUMA
Legal Block	3
Legal Lot Number	52
Jurisdiction	SONOMA CA
Township / Civil Division	PETALUMA
Census Block Group	3
Census Block	3034
Census Tract	150701

Owner

Source: Sonoma County records, as of April 13, 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Individual Names on Record
Mailing Address	56 PLAZA DR, MILL VALLEY, CA 94941-1524
Owner Type	Individual
Vesting	Single Man

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Apr 23, 1993 · Amount on Record
Deed Sale	Apr 23, 1993 · Amount on Record
Deed Document Number	199350391
Last Transfer Date	Sep 12, 2024
Transfer Doc	0000043666
Record Updated	Sep 20, 2026

May 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	SONOMA CA
Recording Date	May 24, 2018
Property Address	320 4TH ST, PETALUMA, CA 94952-5174
Document Number	0000037802
Instrument Date	Sep 14, 2017
Instrument	37802
Transaction Type	Transfer
Record Updated	Jun 8, 2018

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	56 PLAZA DR MILL VALLEY CA 949411524, MILL VALLEY, CA 94941-1524

Tax Assessment & Valuation

Source: Sonoma County assessment roll, as of April 13, 2026

Property Jurisdictions

Type	Name
State	California
County	Sonoma County
Municipality	Petaluma City
Elementary School District	Petaluma City Elementary School District (KG - 06)
Secondary School District	Petaluma Joint Union High School District (07 - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2025	$5,852.00 (+10.19%)	$494,100 (+4.04%) Land $225,377 Building $268,723
2023	$5,311.00 (+0.84%)	$474,915 Land $216,626 Building $258,289
2022	$5,267.00

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 Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Community Rating System	Class 6 (20% premium discount)
Nearby Flood Policies	43 units insured incl. 37 condo units

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	Low lower than 80% of the US · lower than 88% of California
Wildfire Likelihood	0.01% annual chance
Exposure	None 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 System	CITY OF PETALUMA serves 61,427 people · EPA ID CA4910006
Water Source	Groundwater
Last State Inspection	Jun 2024
Lead	Under 1 ppb (2021–2023) 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 724 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Sonic Telecom Fiber	10,000 / 10,000
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
AT&T DSL · Fiber in parts of the area	100 / 20

May also be available: Astound Broadband, T-Mobile.

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