Sonoma County property record for 25 Union St, Petaluma, CA 94952
| Property Type | Duplex |
|---|---|
| Details | 1 bd · 1.5 ba · 1,338 sqft · built 1870 |
| Lot Size | 0.111 acres (4,845 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $3,113 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 006-272-002-000 |
| Primary APN | 006-272-002-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 1 Bed |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 2 Rooms |
| Units | 2 Units |
| Stories | 1 Story |
| Building Area | 1,338 sqft Living Area |
| 1st Floor Area | 1,338 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1870 |
|---|---|
| Effective Year Built | Effective 1900 |
| Construction Type | Wood |
| Lot Area | 4,845 sqft (0.111 acres) |
| Garage Type | Detached |
| Garage Area | 252 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | None |
|---|
| Street Address | 25 UNION ST |
|---|---|
| City | PETALUMA |
| State | CA |
| Zip | 94952-2730 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | CITYPE |
| Legal Subdivision | PETALUMA |
| Legal Block | 4 |
| Legal Lot Number | 443 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | PETALUMA |
| Census Block Group | 4 |
| Census Block | 4015 |
| Census Tract | 150902 |
Source: Sonoma County records · APN 006-272-002-000
Assessment roll updated April 13, 2026 · Last verified May 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 File |
|---|---|
| Mailing Address | 7 WASHINGTON PARK AVE, MILL VALLEY, CA 94941-1751 |
| Owner Type | Individual |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Transfer Date | Nov 28, 2000 |
| Transfer Doc | 0000011235 |
| Record Updated | Jun 08, 2026 |
Source: Sonoma County records · Assessment roll updated April 13, 2026 · Last verified May 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) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $3,113.00 (+11.5%) | $253,610 (+4.04%) Land $76,183 Building $177,427 |
| 2023 | $2,792.00 (+0.83%) | $243,765 Land $73,226 Building $170,539 |
| 2022 | $2,769.00 |
Source: FEMA National Flood Hazard Layer as of February 15, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Claims | 1 (1982) |
| Most Recent Claim | Jan 1982 · Severe Storms, Flood, Mudslides & High Tide |
| Wildfire Risk | Low lower than 96% of the US · lower than 97.4% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| 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.
Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| AT&T Fiber · DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
Based on FCC filings for 714 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | CITY OF PETALUMA serves 61,427 people |
|---|---|
| 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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
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