Kern County property record for 12100 Kostopolous Ave, Boron, CA 93516
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,228 sqft · built 1944 |
| Lot Size | 0.279 acres (12,196 sqft) |
| Owner | Individual Name on File |
| Last Sale | $65,000 (Jun 2015) |
| Tax Bill | $1,103 (2025) |
| Deeds & Mortgages | Mar 2022 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 231-370-18-00-5 |
| Primary APN | 231-370-18-00-5 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Stories | 1 Story |
| Building Area | 1,228 sqft Living Area |
| 1st Floor Area | 943 sqft |
| Year Built | Built 1944 |
|---|---|
| Construction Type | Wood |
| Lot Area | 12,196 sqft (0.279 acres) |
| Porch | Porch |
| Porch Area | 276 sqft |
| Patio Area | 15 sqft |
| Cooling System | HVAC |
|---|---|
| Heating System | Floor/Wall Furnace |
| Old Parcel Number | 2313701800 |
|---|---|
| Street Address | 12100 KOSTOPOLOUS AVE |
| City | BORON |
| State | CA |
| Zip | 93516-1805 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R-3 |
| Legal Description | SECTION 32, TOWNSHIP 11, RANGE 7, QUARTER |
| Legal Range | 07 |
| Legal Township | 11 |
| Legal Section | 32 |
| Jurisdiction | KERN CA |
| Township / Civil Division | EAST KERN |
| Census Block Group | 2 |
| Census Block | 2030 |
| Census Tract | 5600 |
Source: Kern County records · APN 231-370-18-00-5
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 | Individual Name on File |
|---|---|
| Co-owner | Verified Secondary Owner |
| Mailing Address | 4051 MCARTHUR RD, RIVERSIDE, CA 92503-3847 |
| Owner Type | Individual |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Jun 03, 2015 · Amount on Record |
| Deed Sale | Jun 03, 2015 · Amount on Record |
| Prior Sale | Jun 03, 2015 · Amount on Record |
| Deed Document Number | 0000070837 |
| Last Transfer Date | Mar 03, 2022 |
| Transfer Doc | 0000033847 |
| Record Updated | Jun 07, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | KERN CA |
| Recording Date | Mar 03, 2022 |
| Property Address | 12100 KOSTOPOLOUS AVE, BORON, CA 93516-1805 |
| Document Number | 0000033847 |
| Instrument Date | Feb 03, 2022 |
| Instrument | 222033847 |
| Transaction Type | Transfer |
| Record Updated | Mar 11, 2022 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 4051 MCARTHUR RD, RIVERSIDE, CA 92503-3847 |
Source: Kern County records · Assessment roll updated July 1, 2025 · Last verified October 2025
| Type | Name |
|---|---|
| State | California |
| County | Kern County |
| Unified School District | Muroc Joint 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 |
|---|---|---|
| 2025 | $1,103.00 (+1.47%) | $78,110 (+4.04%) Land $7,206 Building $70,904 |
| 2023 | $1,087.00 (+5.02%) | $75,078 Land $6,927 Building $68,151 |
| 2022 | $1,035.00 |
Source: FEMA National Flood Hazard Layer as of April 30, 2025 · FEMA NFIP claims and policies as of September 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 |
| Flood Insurance Cost | Premium on Record median of 10 policies |
| Community Rating System | Class 9 (5% premium discount) |
| Nearby Flood Policies | 10 in force |
| Wildfire Risk | Low lower than 67% of the US · lower than 81% of California |
|---|---|
| Wildfire Likelihood | 0.02% annual chance |
| Exposure | Direct burnable vegetation at the parcel |
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.
Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Frontier Fiber | 5,000 / 5,000 |
| Spectrum Cable | 1,000 / 1,000 |
| Race Telecommunications Fiber | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
Based on FCC filings for 50 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 | BORON CSD serves 2,086 people |
|---|---|
| Water Source | Purchased surface water from ANTELOPE VALLEY E KERN WTR AGY-ROSAMOND |
| Last State Inspection | Oct 2024 |
| Also Mapped Here | DESERT LAKE COMM SERV DIST, ANTELOPE VALLEY EAST KERN WATER AGENCY |
| Lead | Under 1 ppb (2022–2024) action level 15 ppb |
| Water Quality | Arsenic resolved · Jul 2018 |
|---|---|
| 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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