Sonoma County property record for 509 4th St, Petaluma, CA 94952
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 736 sqft · built 1900 |
| Lot Size | 0.08 acres (3,484 sqft) |
| Owner | Company Name on Record |
| Tax Bill | $527 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 008-265-012-000 |
| Primary APN | 008-265-012-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 3 Rooms |
| Stories | 1 Story |
| Building Area | 736 sqft Living Area |
| 1st Floor Area | 736 sqft |
| Year Built | Built 1900 |
|---|---|
| Effective Year Built | Effective 1937 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 3,484 sqft (0.08 acres) |
| Garage Type | Detached |
| Garage Area | 440 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | None |
|---|
| Old Parcel Number | 008-265-012 |
|---|---|
| Street Address | 509 4TH ST |
| City | PETALUMA |
| State | CA |
| Zip | 94952-5102 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | CITYPE |
| Legal Description | 80 FORM PT OF 8-265-02 PM 154 |
| Legal Block | 2 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | PETALUMA |
| Census Block Group | 2 |
| Census Block | 2010 |
| Census Tract | 150701 |
Source: Sonoma County records, as of October 21, 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 Record |
|---|---|
| Mailing Address | 11 HALSEY AVE, PETALUMA, CA 94952-4914 |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | Jun 30, 2023 |
| Transfer Doc | 0000031342 |
| Record Updated | Oct 29, 2026 |
Source: Sonoma County assessment roll, as of September 1, 2026
| 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) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $26,176 (+2%) Land $12,609 Building $13,567 | |
| 2025 | $527.00 (+26.99%) | $25,663 (+4.03%) Land $12,362 Building $13,301 |
| 2023 | $415.00 (+0.73%) | $24,669 Land $11,883 Building $12,786 |
| 2022 | $412.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 | 2 in force |
| Nearby Flood Claims | 13 (1980–1998) |
| Claims Outside the SFHA | 4 of 13 |
| Most Recent Claim | Feb 1998 · Severe Winter Storms And Flooding |
| Claims by Event |
|
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.
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.
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 |
| 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.
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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