18440 4th Ave, Sonoma, CA 95476 Property Records

Sonoma County property record for 18440 4th Ave, Sonoma, CA 95476

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 1,484 sqft · built 1951
Lot Size	0.143 acres (6,210 sqft)
Owner	Trust Name on File
Last Sale	$280,000 (Oct 2011)
Tax Bill	$5,628 (2025)
Deeds & Mortgages	Apr 2021 Mortgage Jun 2021 Transfer
Flood Zone	Zone X (minimal risk)
APN	`056-471-017-000`

Property Details

APN / Parcel Number

Primary APN	`056-471-017-000`
Alternative APN	`056-471-017`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	4 Rooms
Stories	1 Story
Building Area	1,484 sqft Living Area
1st Floor Area	1,484 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1951
Effective Year Built	Effective 1985
Architectural Style	Custom Design
Lot Area	6,210 sqft (0.143 acres)
Garage Type	Carport
Garage Area	240 sqft
Carport	Carport
Carport Area	240 sqft
Parking Spaces	1 Parking Space
Porch	Porch

Utilities, Heating & Cooling

Cooling System	HVAC
Heating System	Floor/Wall Furnace

Location & Zoning

Old Parcel Number	056-471-017
Street Address	18440 4TH AVE
City	SONOMA
State	CA
Zip	95476-3906
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R15UA
Legal Description	MAP D3 447
Legal Subdivision	BOYES SPGS PARK B
Legal Block	1
Legal Lot Number	14
Jurisdiction	SONOMA CA
Township / Civil Division	SONOMA
Census Block Group	1
Census Block	1020
Census Tract	150306

Owner

18440 4th Ave is held in a trust since April 2021.

Source: Sonoma County records, as of September 1, 2026

Owner of Record	Trust Name on File
Mailing Address	1110 LOMA CT, SONOMA, CA 95476-3949
Owner Type	Company
Vesting	Trust

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Date	Document
Apr 22, 2021	Deed, Transfer · Conventional Mortgage AMERICAN INTERNET MORTGAGE INC
Jun 2, 2021	Intrafamily Transfer, Transfer

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Oct 26, 2011 · Amount on File
Deed Sale	Oct 26, 2011 · Amount on File
Prior Sale	Jun 27, 2000 · Amount on File
Deed Document Number	201194873
Last Transfer Date	Apr 12, 2021
Transfer Doc	0000065642
Record Updated	Oct 29, 2026

April 2021: Deed, Transfer

Document Type	Deed
Jurisdiction	SONOMA CA
Recording Date	Apr 22, 2021
Property Address	18440 4TH AVE, SONOMA, CA 95476-3906
Document Number	0000049768
Instrument Date	Apr 12, 2021
Instrument	2021049768
Transaction Type	Transfer
Record Updated	May 12, 2021
Title Company	ACCOMODATION, ACCOMMODATION

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
Relationship	Joint Tenants
Address	1110 LOMA CT, SONOMA, CA 95476-3949

Mortgage

Document Number	0000049769
Date	Apr 22, 2021
Instrument	2021049769

Lender

Name	AMERICAN INTERNET MORTGAGE INC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	May 1, 2051

June 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SONOMA CA
Recording Date	Jun 2, 2021
Property Address	18440 4TH AVE, SONOMA, CA 95476-3906
Document Number	0000065642
Instrument Date	Apr 12, 2021
Instrument	2021065642
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	Family Living Trust
Address	1110 LOMA CT, SONOMA, CA 95476-3949

Tax Assessment & Valuation

The 2025 property tax bill for 18440 4th Ave was $5,628.

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

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$358,717 (+2%) Land $102,487 Building $256,230
2025	$5,628.00	$351,684 Land $100,478 Building $251,206
2023	$5,467.00 (+0.2%)	$338,029 Land $96,577 Building $241,452
2022	$5,456.00

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

Flood

FEMA maps place 18440 4th Ave in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective February 15, 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Values are read at the parcel center point; lenders make the official flood determination.

Wildfire

Wildfire risk around 18440 4th Ave is low, with a 0.02% annual chance of 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	0.02% annual chance
Exposure	Indirect 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 System	VALLEY OF THE MOON WATER DISTRICT serves 23,140 people · EPA ID CA4910013
Water Source	Groundwater
Last State Inspection	Sep 2022
Lead	Under 1 ppb (2024–2026) 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 718 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
Starlink Satellite	280 / 30
AT&T DSL · Fiber in parts of the area	100 / 20

May also be available: T-Mobile.

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