434 Patten St, Sonoma, CA 95476 Property Records

Sonoma County property record for 434 Patten St, Sonoma, CA 95476

Property Summary

Property Type	Duplex
Details	2 bd · 1 ba · 996 sqft · built 1950
Lot Size	0.196 acres (8,550 sqft)
Owner	Individual Name on Record
Last Sale	$658,000 (Sep 2019)
Tax Bill	$2,338 (2025)
Deeds & Mortgages	May 2026 Mortgage Mar 2026 Transfer + 4 more
Flood Zone	Zone X (moderate risk)
APN	`018-273-034-000`

Property Details

APN / Parcel Number

Primary APN	`018-273-034-000`
Alternative APN	`018-273-034`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Total Rooms	2 Rooms
Units	2 Units
Stories	1 Story
Building Area	996 sqft Living Area
Gross Area	1,295 sqft
1st Floor Area	996 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1950
Effective Year Built	Effective 1980
Construction Type	Wood
Lot Area	8,550 sqft (0.196 acres)
Garage Type	Attached
Garage Area	299 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Cooling System	HVAC

Location & Zoning

Old Parcel Number	018-273-034
Street Address	434 PATTEN ST
City	SONOMA
State	CA
Zip	95476-6734
Property Category	Residential
Property Type	Residential > Multi-Unit > Duplex
Local Zoning Code	R1
Legal Description	1973 FORM 18-273-22 C/W PT OF 32
Legal Subdivision	PICETTI TERRACE
Legal Block	3
Legal Lot Number	9,10
Jurisdiction	SONOMA CA
Township / Civil Division	SONOMA
Census Block Group	3
Census Block	3006
Census Tract	150204

Historic Designation

Source: NPS National Register of Historic Places, as of August 1, 2026

Historic District	Within the Sonoma Plaza listed 1975 · 31 contributing resources · National Historic Landmark (designated 1960) · NRIS 75000489

Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.

Owner

Source: Sonoma County records, as of September 14, 2026

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

Owner of Record	Individual Name on Record
Mailing Address	434 PATTEN ST, SONOMA, CA 95476-6734
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Date	Document
May 11, 2026	Grant Deed, Transfer · Conventional Mortgage GUARANTEED RATE, INC
Mar 23, 2026	Gift Deed, Transfer
Mar 17, 2026	Intrafamily Transfer, Transfer
Mar 25, 2026	Gift Deed, Transfer
Jun 10, 2021	Intrafamily Transfer, Transfer
Feb 9, 2021	Grant Deed, Transfer

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Sep 30, 2019 · Amount on Record
Deed Sale	Sep 30, 2019 · Amount on Record
Deed Document Number	201970315
Last Transfer Date	Mar 16, 2026
Transfer Doc	0000013720
Record Updated	Oct 29, 2026

May 2026: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SONOMA CA
Recording Date	May 11, 2026
Property Address	434 PATTEN ST, SONOMA, CA 95476-6734
Document Number	0000023259
Instrument Date	May 1, 2026
Instrument	202623259
Transaction Type	Transfer
Record Updated	Jul 12, 2026
Title Company	FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE COMPAN

Transaction

Tax	$0.00
Amount Accuracy	Full Amount Stated

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	434 PATTEN ST, SONOMA, CA 95476-6734

Mortgage

Document Number	0000023260,
Date	May 11, 2026
Instrument	202623260

Lender

Name	GUARANTEED RATE, INC

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Jun 1, 2056

Interest

Rate Type	Fixed Rate
Rate	6.38%
Initial Type	Fixed Rate
Max Rate	-1%

March 2026: Gift Deed, Transfer

Document Type	Gift Deed
Jurisdiction	SONOMA CA
Recording Date	Mar 23, 2026
Property Address	434 PATTEN ST, SONOMA, CA 95476-6734
Document Number	0000013366
Map Reference	MB 32 PG 20
Instrument Date	Mar 16, 2026
Instrument	2026013366
Transaction Type	Transfer
Record Updated	Apr 2, 2026

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	434 PATTEN ST, SONOMA, CA 95476-6734

March 2026: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SONOMA CA
Recording Date	Mar 17, 2026
Property Address	434 PATTEN ST, SONOMA, CA 95476-6734
Document Number	0000012494
Instrument Date	Mar 16, 2026
Instrument	2026012494
Transaction Type	Transfer
Record Updated	Mar 27, 2026

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	434 PATTEN ST, SONOMA, CA 95476-6734

March 2026: Gift Deed, Transfer

Document Type	Gift Deed
Jurisdiction	SONOMA CA
Recording Date	Mar 25, 2026
Property Address	434 PATTEN ST, SONOMA, CA 95476-6734
Document Number	0000013720
Map Reference	MB 32 PG 20
Instrument Date	Mar 16, 2026
Instrument	2026013720
Transaction Type	Transfer
Record Updated	Apr 2, 2026

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	434 PATTEN ST, SONOMA, CA 95476-6734

June 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SONOMA CA
Recording Date	Jun 10, 2021
Property Address	434 PATTEN ST, SONOMA, CA 95476-6734
Document Number	0000068726
Instrument Date	Jun 7, 2021
Instrument	2021068726
Transaction Type	Transfer
Record Updated	Jun 7, 2023

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	392 SAUNDERS DR, SONOMA, CA 95476-7676

February 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SONOMA CA
Recording Date	Feb 9, 2021
Property Address	434 PATTEN ST, SONOMA, CA 95476-6734
Document Number	0000015713
Instrument Date	Feb 5, 2021
Instrument	2021015713
Transaction Type	Transfer
Record Updated	Aug 19, 2021

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	392 SAUNDERS DR, SONOMA, CA 95476-7676

Tax Assessment & Valuation

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

Property Jurisdictions

Type	Name
State	California
County	Sonoma County
Municipality	Sonoma City
Unified School District	Sonoma Valley Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$69,489 (+2%) Land $24,732 Building $44,757
2025	$2,338.00 (-21.33%)	$68,128 (+4.04%) Land $24,248 Building $43,880
2023	$2,972.00 (+7.22%)	$65,484 Land $23,307 Building $42,177
2022	$2,772.00

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

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 moderate risk
500-Year Floodplain	Yes 0.2% annual chance
Flood Insurance Requirement	Not required lenders may require it
Community Rating System	Class 10 (0% premium discount)
Nearby Flood Policies	3 in force
Nearby Flood Claims	1 (1998)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Jan 1998 · rainfall accumulation

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 SONOMA serves 10,619 people · EPA ID CA4910012
Water Source	Groundwater
Last State Inspection	Jul 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	1 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 540 locations within half a mile, as of December 31, 2025

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

May also be available: T-Mobile.

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