Sonoma County property record for 521 D St, Petaluma, CA 94952
| Property Type | Quadplex |
|---|---|
| Details | 2 bd · 2 ba · 2,136 sqft · built 1878 |
| Lot Size | 0.119 acres (5,200 sqft) |
| Owner | Company Name on Record |
| Last Sale | $280,000 (Jan 1992) |
| Tax Bill | $5,863 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 008-181-019-000 |
| Primary APN | 008-181-019-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 4 Rooms |
| Units | 4 Units |
| Stories | 2 Stories |
| Building Area | 2,136 sqft Living Area |
| Gross Area | 2,391 sqft |
| Year Built | Built 1878 |
|---|---|
| Effective Year Built | Effective 1878 |
| Construction Type | Wood |
| Lot Area | 5,200 sqft (0.119 acres) |
| Garage Type | Attached |
| Garage Area | 255 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | None |
|---|
| Old Parcel Number | 008-181-019 |
|---|---|
| Street Address | 521 D ST |
| City | PETALUMA |
| State | CA |
| Zip | 94952-3087 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Quadplex |
| Local Zoning Code | CITYPE |
| Legal Description | PART OF LOT 79 |
| Legal Subdivision | CITY PETALUMA |
| Legal Block | 3 |
| Legal Lot Number | 79 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | PETALUMA |
| Census Block Group | 3 |
| Census Block | 3035 |
| Census Tract | 150701 |
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 Record |
|---|---|
| Mailing Address | 6 BEACH RD, 1112, BELVEDERE TIBURON, CA 94920-2811 |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jan 10, 1992 · Amount on Record |
| Deed Sale | Jan 10, 1992 · Amount on Record |
| Deed Document Number | 19922690 |
| 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 | $505,026 (+2%) Land $180,365 Building $324,661 | |
| 2025 | $5,863.00 (+10.17%) | $495,125 (+4.04%) Land $176,829 Building $318,296 |
| 2023 | $5,322.00 (+0.85%) | $475,900 Land $169,963 Building $305,937 |
| 2022 | $5,277.00 |
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 | 43 units insured incl. 37 condo units |
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 432 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, Fixed Wireless in parts of the area | 100 / 20 |
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