318 Mason St, Healdsburg, CA 95448 Property Records

Sonoma County property record for 318 Mason St, Healdsburg, CA 95448 · Last verified April 2026

Property Summary

Property Type	Single Family Home
Details	2 bd · 1 ba · 952 sqft · built 1870
Lot Size	0.113 acres (4,900 sqft)
Owner	Company Name on File
Last Sale	$130,000 (May 1993)
Tax Bill	$2,806 (2025)
Deeds & Mortgages	May 2017 Transfer
Flood Zone	Zone X (minimal risk)
APN	`002-291-015-000`

Property Details

APN / Parcel Number

Primary APN	`002-291-015-000`
Alternative APN	`002-291-015`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Total Rooms	2 Rooms
Stories	1 Story
Building Area	952 sqft Living Area
1st Floor Area	952 sqft

Exterior

Year Built	Built 1870
Effective Year Built	Effective 1922
Architectural Style	Custom Design
Construction Type	Wood
Lot Area	4,900 sqft (0.113 acres)
Garage Type	Detached
Garage Area	360 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Cooling System	HVAC
Heating System	Floor/Wall Furnace

Location & Zoning

Street Address	318 MASON ST
City	HEALDSBURG
State	CA
Zip	95448-4418
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Subdivision	HEALDS ADD TO THE TOWN OF HEALDSBURG
Legal Block	1
Legal Lot Number	19-21
Jurisdiction	SONOMA CA
Township / Civil Division	HEALDSBURG
Census Block Group	1
Census Block	1020
Census Tract	153902

Owner

Source: Sonoma County records · APN 002-291-015-000

Assessment roll updated April 13, 2026 · Last verified April 2026

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

Owner of Record	Company Name on File
Mailing Address	PO BOX 31, WINDSOR, CA 95492-0031
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	May 28, 1993 · Amount on Record
Deed Sale	May 28, 1993 · Amount on Record
Deed Document Number	199367066
Last Transfer Date	Nov 04, 2005
Transfer Doc	0000167153
Record Updated	Jun 08, 2026

May 2017: Affidavit of Death, Transfer

Document Type	Affidavit of Death
Jurisdiction	SONOMA CA
Recording Date	May 12, 2017
Property Address	318 MASON ST, HEALDSBURG, CA 95448-4418
Document Number	0000037537
Instrument Date	May 10, 2017
Instrument	37537
Transaction Type	Transfer
Record Updated	May 29, 2017

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	9625 SOUTHAMPTON DR WINDSOR CA 954928016, WINDSOR, CA 95492-8016

Tax Assessment & Valuation

Source: Sonoma County records · Assessment roll updated April 13, 2026 · Last verified April 2026

Property Jurisdictions

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

Tax Bill & Assessment History

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

Year	Tax Bill	Assessed Value
2025	$2,806.00 (+4.9%)	$225,696 (+4.04%) Land $121,530 Building $104,166
2023	$2,675.00 (+1.06%)	$216,934 Land $116,812 Building $100,122
2022	$2,647.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Sonoma County (06097C), updated February 15, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060971539021, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X
Special Flood Hazard Area	No
Flood Hazard	Minimal
500-Year Floodplain	No
Flood Insurance Cost	Premium on Record median of 20 individual NFIP policies nearby
Nearby Flood Policies	20 in force 3 of 20 on primary residences
Nearby Flood Claims	31 (1978–2026)
Claims Outside the SFHA	10 of 31
Most Recent Claim	Jan 2026, rainfall accumulation
Flood Events	Severe Storms, Flooding, Mud And Landslides (Jan 1997), 3 claims Severe Winter Storms, Flooding Landslides, Mud Flow (Mar 1995), 3 claims Coastal Storms, Floods, Slides & Tornadoes (Mar 1983), 6 claims

Wildfire

Wildfire Risk	Not rated no burnable land in reach
Wildfire Likelihood	Negligible
Exposure	None beyond ember reach

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.