Los Angeles County property record for 523 William St, Pomona, CA 91768
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,028 sqft · built 1895 |
| Lot Size | 0.176 acres (7,680 sqft) |
| Owner | 2 Company Names on File |
| Last Sale | $315,000 (May 2015) |
| Tax Bill | $5,226 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 8340-023-003 |
| Primary APN | 8340-023-003 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,028 sqft Living Area |
| Year Built | Built 1895 |
|---|---|
| Effective Year Built | Effective 1925 |
| Architectural Style | Conventional |
| Construction Type | Wood |
| Roof Type | Gable |
| Roof Material | Composition Shingle |
| Lot Area | 7,680 sqft (0.176 acres) |
| Lot Dimensions | 128 ft deep x 60 ft wide |
| Heating System | Floor/Wall Furnace |
|---|---|
| Water Source | Commercial |
| Street Address | 523 WILLIAM ST |
|---|---|
| City | POMONA |
| State | CA |
| Zip | 91768-3638 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | POR3YY |
| Legal Description | F E REEVES SUB OF LOTS 3&4 BLK 181 POMONA LOT 2 BLK B |
| Legal Subdivision | REEVES SUB OF LOTS 3 & 4 OF BLOCK 181 |
| Legal Block | 181,B |
| Legal Lot Number | 3,4,2 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 2 |
| Census Block | 2006 |
| Census Tract | 402303 |
523 William St is owned by a company that bought it in May 2015.
Source: Los Angeles County records, as of August 25, 2026
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 523 WILLIAM ST, POMONA, CA 91768-3638 |
| Owner Type | Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | May 22, 2015 · Amount on File |
| Deed Sale | May 22, 2015 · Amount on File |
| Prior Sale | Nov 5, 2014 · Amount on File |
| Deed Document Number | 2015600183 |
| Prior Transfer Date | Dec 26, 1993 |
| Prior Transfer Doc | 0000085658 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 523 William St was $5,226.
Source: Los Angeles County assessment roll, as of August 25, 2026
| Type | Name |
|---|---|
| State | California |
| County | Los Angeles County |
| Municipality | Pomona City |
| Unified School District | Pomona Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $386,142 (+2%) Land $261,354 Building $124,788 | |
| 2025 | $5,226.00 | $378,572 Land $256,230 Building $122,342 |
| 2023 | $4,716.00 (+1.59%) | $363,874 Land $246,281 Building $117,593 |
| 2022 | $4,642.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 523 William St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 30, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
The area around 523 William 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 | POMONA - CITY, WATER DEPT. serves 151,713 people · EPA ID CA1910126 |
|---|---|
| Water Source | Surface water |
| Lead | 2 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, 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 516 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Frontier Fiber | 7,000 / 7,000 |
| Spectrum Cable · Fiber in parts of the area | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless · DSL in parts of the area | 100 / 20 |
May also be available: GeoLinks, T-Mobile.
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