Riverside County property record for 9546 Mason St, Riverside, CA 92503
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 2 ba · 1,764 sqft · built 1957 |
| Lot Size | 0.17 acres (7,405 sqft) |
| Owner | Trust Name on File |
| Last Sale | $292,000 (Nov 2013) |
| Tax Bill | $3,166 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 145-290-038 |
| Primary APN | 145-290-038 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Units | 2 Units |
| Stories | 1 Story |
| Building Area | 1,764 sqft Living Area |
| Gross Area | 2,264 sqft |
| 1st Floor Area | 1,764 sqft |
| Year Built | Built 1957 |
|---|---|
| Effective Year Built | Effective 1957 |
| Architectural Style | Duplex Single |
| Construction Type | Wood |
| Roof Material | Gravel |
| Lot Area | 7,405 sqft (0.17 acres) |
| Garage Type | Attached |
| Garage Area | 500 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Heating Fuel | Gas |
| Sewer | Connected |
| Old Parcel Number | 051800031 |
|---|---|
| Street Address | 9546 MASON ST |
| City | RIVERSIDE |
| State | CA |
| Zip | 92503-3611 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | R2 |
| Legal Description | LOT 31 MB 008/026 VAN BUREN PK RESUB OF |
| Legal Subdivision | VAN BUREN PK RESUB OF |
| Legal Lot Number | 31 |
| Jurisdiction | RIVERSIDE CA |
| Township / Civil Division | RIVERSIDE |
| Census Block Group | 1 |
| Census Block | 1006 |
| Census Tract | 31602 |
Source: Riverside County records · APN 145-290-038
Assessment roll updated July 29, 2026 · Last verified August 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 9554 MASON ST, RIVERSIDE, CA 92503-3611 |
| Owner Type | Individual |
| Vesting | Trust, Personal Trust |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Nov 13, 2013 · Amount on Record |
| Deed Sale | Nov 13, 2013 · Amount on Record |
| Deed Document Number | 2013538438 |
| Prior Transfer Date | Oct 29, 1997 |
| Prior Transfer Doc | 0000427376 |
| Record Updated | Sep 20, 2026 |
Source: Riverside County records · Assessment roll updated July 29, 2026 · Last verified August 2026
| Type | Name |
|---|---|
| State | California |
| County | Riverside County |
| Municipality | Riverside City |
| Unified School District | Riverside Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $285,061 (+2%) Land $58,380 Building $226,681 | |
| 2025 | $3,166.00 (+3.8%) | $279,473 (+4.04%) Land $57,236 Building $222,237 |
| 2023 | $3,050.00 (+1.87%) | $268,622 Land $55,014 Building $213,608 |
| 2022 | $2,994.00 |
Source: FEMA National Flood Hazard Layer as of October 14, 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 |
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
Values are read at the parcel center point; 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) |
|---|---|
| AT&T Fiber · DSL · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Spectrum Cable | 1,000 / 1,000 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
May also be available: California Internet, Verizon.
Based on FCC filings for 575 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 RIVERSIDE serves 302,776 people |
|---|---|
| Water Source | Groundwater influenced by surface water |
| Lead | 1 ppb (2023–2025) 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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