9580 Mason St, Riverside, CA 92503 Property Records

Riverside County property record for 9580 Mason St, Riverside, CA 92503

Property Summary

Property Type	Single Family Home
Details	4 bd · 2 ba · 1,674 sqft · built 1952
Lot Size	0.179 acres (7,840 sqft)
Owner	2 Individual Names on File
Tax Bill	$2,574 (2025)
Flood Zone	Zone X (minimal risk)
APN	`145-290-042`

Property Details

APN / Parcel Number

Primary APN	`145-290-042`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Stories	1 Story
Building Area	1,674 sqft Living Area
Fireplace	Fireplace

Exterior

Year Built	Built 1952
Construction Type	Wood
Roof Material	Composition Shingle
Lot Area	7,840 sqft (0.179 acres)
Garage Type	Detached
Garage Area	484 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Sewer	Connected

Location & Zoning

Account Number	145290042
Street Address	9580 MASON ST
City	RIVERSIDE
State	CA
Zip	92503-3611
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R2
Legal Description	LOT 35 MB 008/026 VAN BUREN PK RESUB OF
Legal Subdivision	TRACT SUBDIVISION VAN BUREN PARK
Legal Lot Number	35
Jurisdiction	RIVERSIDE CA
Township / Civil Division	RIVERSIDE
Census Block Group	1
Census Block	1006
Census Tract	31602

Owner

Source: Riverside County records · APN 145-290-042

Assessment roll updated July 1, 2025 · Last verified October 2025

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Individual Names on File
Co-owner	Verified Secondary Owner
Mailing Address	9580 MASON ST, RIVERSIDE, CA 92503-3611
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Jan 14, 2004
Deed Sale	Jan 14, 2004
Prior Sale	Oct 30, 2003
Deed Document Number	2004-0025155
Record Updated	Jun 08, 2026

Tax Assessment & Valuation

Source: Riverside County records · Assessment roll updated July 1, 2025 · Last verified October 2025

Property Jurisdictions

Type	Name
State	California
County	Riverside County
Municipality	Riverside City
Unified School District	Riverside Unified School District (KG - 12)

Tax Bill & Assessment History

Assessed value is set for property tax purposes and is not a market price estimate.

Year	Tax Bill	Assessed Value
2025	$2,574.00 (+3.79%)	$225,989 (+4.04%) Land $75,374 Building $150,615
2023	$2,480.00 (+1.85%)	$217,216 Land $72,449 Building $144,767
2022	$2,435.00

Flood & Wildfire

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

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Wildfire

Wildfire Risk	Not rated no burnable land within ember reach

Values are read at the parcel center point; lenders make the official flood determination.

Internet Providers

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.

Drinking Water

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

Violations Reported to EPA

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.