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23509 Ridge Line Rd, Diamond Bar
APN 8713-004-004 · map page 8713-004
A 1.59-acre vacant residential lot at 23509 Ridge Line Rd in Diamond Bar, Los Angeles County (APN 8713-004-004). It is in a Very High CAL FIRE hazard zone and outside the FEMA flood zone (zone X). Its zoning is set by the City of Diamond Bar. It is assessed at $1,248,283 ($785,084 an acre), with a yearly tax bill of $15,302. Property taxes are not in default.
Risk Assessment
Flood
Zone X — AREA OF MINIMAL FLOOD HAZARD
Outside flood zone
Low Risk
Fire
CAL FIRE hazard severity zone
Very High
High Risk
Past Fires
CAL FIRE perimeters since 1878
None mapped
Low Risk
Property Details
- APN
- 8713-004-004
- Area
- Diamond Bar, Los Angeles County
- Zoning
- Set by the City of Diamond Bar
- Assessor Use
- Single (010V)
Solar
4,445 hrs/yr
Excellent
Weather & Climate
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Taxes
- Tax Status
- Current
- Yearly Tax Bill
- $15,302
From the LA County Treasurer and Tax Collector's rolls, checked Oct 19, 2026.
Tax Assessment History
| Year | Land | Improvement | Total |
|---|---|---|---|
| 2025 | $1,223,807 | $0 | $1,223,807 |
| 2024 | $1,199,811 | $0 | $1,199,811 |
| 2023 | $1,176,286 | $0 | $1,176,286 |
| 2022 | $1,153,222 | $308,105 | $1,461,327 |
| 2021 | $1,130,610 | $302,064 | $1,432,674 |
| 2020 | $1,119,017 | $298,967 | $1,417,984 |
| 2019 | $1,097,076 | $293,105 | $1,390,181 |
| 2018 | $1,075,565 | $287,358 | $1,362,923 |
| 2017 | $1,054,476 | $281,724 | $1,336,200 |
| 2016 | $1,033,800 | $276,200 | $1,310,000 |
Owner
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Official record: county assessor