Sonoma County property record for 503 Prospect St, Petaluma, CA 94952
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 1.5 ba · 1,174 sqft · built 1907 |
| Lot Size | 0.103 acres (4,500 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $225,000 (Jun 2021) |
| Tax Bill | $6,494 (2025) |
| Deeds & Mortgages | Dec 2022 Second Mortgage Jun 2021 Sale & Mortgage + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 006-244-002-000 |
| Primary APN | 006-244-002-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 4 Rooms |
| Stories | 2 Stories |
| Building Area | 1,174 sqft Living Area |
| 1st Floor Area | 722 sqft |
| Year Built | Built 1907 |
|---|---|
| Effective Year Built | Effective 1919 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 4,500 sqft (0.103 acres) |
| Cooling System | None |
|---|
| Old Parcel Number | 006-244-002 |
|---|---|
| Street Address | 503 PROSPECT ST |
| City | PETALUMA |
| State | CA |
| Zip | 94952-2759 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | CITYPE |
| Legal Block | 4 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | PETALUMA |
| Census Block Group | 4 |
| Census Block | 4011 |
| Census Tract | 150902 |
503 Prospect St is owned and occupied by two individuals who acquired it in December 2022.
Source: Sonoma County records, as of September 2, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 503 PROSPECT ST, PETALUMA, CA 94952-2759 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Dec 12, 2022 | Intrafamily Transfer, Transfer · Stand-Alone Second Mortgage REDWOOD CU |
| Jun 22, 2021 | Grant Deed, Transfer · Conventional Mortgage SUMMIT FUNDING INC |
| Jun 22, 2021 | Intrafamily Transfer, Transfer OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 22, 2021 · Amount on File |
| Deed Sale | Jun 22, 2021 · Amount on File |
| Prior Sale | Jun 19, 2013 · Amount on File |
| Deed Document Number | 202172422 |
| Last Transfer Date | Dec 6, 2022 |
| Transfer Doc | 0000078417 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Dec 12, 2022 |
| Property Address | 503 PROSPECT ST, PETALUMA, CA 94952-2759 |
| Document Number | 0000078417 |
| Instrument Date | Dec 6, 2022 |
| Instrument | 2022078417 |
| Transaction Type | Transfer |
| Record Updated | Jun 15, 2023 |
| Title Company | FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 503 PROSPECT ST, PETALUMA, CA 94952-2759 |
| Document Number | 0000078418 |
|---|---|
| Date | Dec 12, 2022 |
| Instrument | 2022078418 |
| Name | REDWOOD CU |
|---|---|
| Type | Credit Union |
| Type | Stand-Alone Second Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 61 Months |
| Due | Jan 1, 2028 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Jun 22, 2021 |
| Property Address | 503 PROSPECT ST, PETALUMA, CA 94952-2759 |
| Document Number | 0000072422 |
| Instrument Date | Jun 14, 2021 |
| Instrument | 2021072422 |
| Transaction Type | Transfer |
| Record Updated | Aug 17, 2023 |
| Title Company | OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Tax | $697.50 |
| Amount Accuracy | Rounded by County |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 503 PROSPECT ST, PETALUMA, CA 94952-2759 |
| Document Number | 0000072424 |
|---|---|
| Date | Jun 22, 2021 |
| Instrument | 2021072424 |
| Name | SUMMIT FUNDING INC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Jul 1, 2051 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Jun 22, 2021 |
| Property Address | 503 PROSPECT ST, PETALUMA, CA 94952-2759 |
| Document Number | 0000072423 |
| Instrument Date | Jun 14, 2021 |
| Instrument | 2021072423 |
| Transaction Type | Transfer |
| Record Updated | Aug 17, 2023 |
| Title Company | OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 503 PROSPECT ST, PETALUMA, CA 94952-2759 |
The 2025 property tax bill for 503 Prospect St was $6,494.
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 | $565,214 (+2%) Land $226,084 Building $339,130 | |
| 2025 | $6,494.00 | $554,132 Land $221,651 Building $332,481 |
| 2023 | $5,898.00 (+0.85%) | $532,616 Land $213,045 Building $319,571 |
| 2022 | $5,848.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 503 Prospect St in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1982.
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 |
| Nearby Flood Claims | 1 (1982) |
| Most Recent Claim | Jan 1982 · Severe Storms, Flood, Mudslides & High Tide |
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.
The area around 503 Prospect St has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within 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 752 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 |
May also be available: T-Mobile.
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