520 Broadway, Sonoma, CA 95476 Property Records

Sonoma County property record for 520 Broadway, Sonoma, CA 95476

Property Summary

Property Type	Commercial Office
Details	1,154 sqft · built 1920
Lot Size	0.02 acres (871 sqft)
Owner	Company Name on File
Tax Bill	$3,245 (2025)
Deeds & Mortgages	Sep 2019 Line of Credit
Flood Zone	Zone X (moderate risk)
APN	`018-810-012-000`

Property Details

APN / Parcel Number

Primary APN	`018-810-012-000`
Alternative APN	`018-810-012`

Interior

Building Area	1,154 sqft Gross Area

Exterior

Year Built	Built 1920
Effective Year Built	Effective 1975
Construction Type	Wood
Fire Resistance	Wood or Wood & Steel Frame
Lot Area	871 sqft (0.02 acres)

Location & Zoning

Old Parcel Number	018-810-012
Street Address	520 BROADWAY
City	SONOMA
State	CA
Zip	95476-6602
Property Category	Commercial
Property Type	Commercial > Office > Commercial Office
Local Zoning Code	C
Legal Description	2000 FM 18-212-31 SONOMA COURT SHOPS A CONDO LOT12
Legal Subdivision	SONOMA COURT SHOPS A CONDO
Legal Block	1
Legal Lot Number	12
Jurisdiction	SONOMA CA
Township / Civil Division	SONOMA
Census Block Group	1
Census Block	1002
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

520 Broadway, a commercial property, is owned by a company.

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 Record	Company Name on File
Mailing Address	PO BOX 27278, SAN FRANCISCO, CA 94127-0278
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Record Updated	Oct 29, 2026

September 2019: Grant Deed, Mortgage

Document Type	Grant Deed
Jurisdiction	SONOMA CA
Recording Date	Sep 11, 2019
Property Address	520 BROADWAY, SONOMA, CA 95476-6602
Instrument Date	Sep 5, 2019
Instrument	64528
Transaction Type	Mortgage
Record Updated	Sep 26, 2019
Title Company	FIRST AMERICAN TITLE

Transaction

Tax	$0.00
Additional	Multiple Parcels

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	35 SAN FERNANDO WAY SAN FRANCISCO CA 941271503, SAN FRANCISCO, CA 94127-1503

Mortgage

Document Number	0000064528
Date	Sep 11, 2019
Instrument	64528

Lender

Name	MECHANICS BK
Type	Bank
Address	PO BOX 6010, SANTA MARIA, CA 93456-6010

Agreement

Type	Line of Credit
Amount	Amount on Record

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

The 2025 property tax bill for 520 Broadway was $3,245.

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		$211,538 (+2%) Land $73,546 Building $137,992
2025	$3,245.00	$207,391 Land $72,104 Building $135,287
2023	$3,090.00 (+1.91%)	$199,340 Land $69,305 Building $130,035
2022	$3,032.00

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

Flood

FEMA maps place 520 Broadway in Zone X, an area of moderate flood risk, though there have been 8 flood claims nearby since 1978.

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
Flood Insurance Cost	Premium on File median of 15 policies
Nearby Flood Policies	15 in force
Nearby Flood Claims	8 (1978–2025)
Claims Outside the SFHA	6 of 8
Most Recent Claim	Feb 2025 · rainfall accumulation
Claims by Event	Severe Winter Storms, Flooding, Landslides, And Mudslides, Feb 2019 · 2 claims Severe Winter Storm, Mud & Land Slides, & Flooding, Jan 1993 · 2 claims

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

Wildfire risk around 520 Broadway is low, with a 0.01% 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	0.01% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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 579 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
T-Mobile Fixed Wireless	100 / 20
AT&T DSL · Fiber, Fixed Wireless in parts of the area	100 / 20