Contra Costa County property record for 5448 Spring Mountain Ln, Antioch, CA 94531
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3.5 ba · 3,143 sqft · built 2023 |
| Lot Size | 0.107 acres (4,678 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $983,500 (Oct 2023) |
| Tax Bill | $14,804 (2025) |
| Deeds & Mortgages | Oct 2023 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 057-190-027-3 |
| Primary APN | 057-190-027-3 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 3,143 sqft Living Area |
| 1st Floor Area | 1,601 sqft |
| 2nd Floor Area | 1,542 sqft |
| Year Built | Built 2023 |
|---|---|
| Effective Year Built | Effective 2023 |
| Lot Area | 4,678 sqft (0.107 acres) |
| Garage Type | Attached |
| Garage Area | 525 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 5448 SPRING MOUNTAIN LN |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94531-6234 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T9569 L27 |
| Legal Subdivision | VINEYARDS/SAND CRK SUB 9569 PR |
| Legal Tract | 9569 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2011 |
| Census Tract | 303207 |
Source: Contra Costa County records, as of July 14, 2026
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 Record |
|---|---|
| Mailing Address | 5448 SPRING MOUNTAIN LN, ANTIOCH, CA 94531-6234 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Oct 6, 2023 · Amount on Record |
| Deed Sale | Oct 6, 2023 · Amount on Record |
| Deed Document Number | 202398065 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Oct 6, 2023 |
| Property Address | 5448 SPRING MOUNTAIN LN, ANTIOCH, CA 94531-6234 |
| Document Number | 0000098065 |
| Map Reference | MB 549 PG 44-51 |
| Instrument Date | Sep 28, 2023 |
| Instrument | 2023-098065 |
| Transaction Type | Subdivision Related Transfer |
| Record Updated | Oct 17, 2023 |
| Title Company | FIRST AMERICAN TITLE COMPANY HOMEBU, FIRST AMER TTL CO HOMEBUILDE |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 5448 SPRING MOUNTAIN LN, ANTIOCH, CA 94531-6234 |
| Document Number | 0000098066 |
|---|---|
| Date | Oct 6, 2023 |
| Instrument | 2023-098066 |
| Name | LOANDEPOT.COM LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Nov 1, 2053 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Antioch City |
| Elementary School District | Brentwood Union Elementary School District (KG - 08) |
| Secondary School District | Liberty Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,022,713 (+2%) Land $228,888 Building $793,825 | |
| 2025 | $14,804.00 (+187.57%) | $1,002,660 (+489.39%) Land $224,400 Building $778,260 |
| 2023 | $5,148.00 (+346.88%) | $170,119 Land $170,119 |
| 2022 | $1,152.00 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 2 in force |
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: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 57% of the US · lower than 66% of California |
|---|---|
| Wildfire Likelihood | 0.1% annual chance |
| Exposure | Indirect 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 | CITY OF ANTIOCH serves 116,781 people · EPA ID CA0710001 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2024 |
| Lead | Under 1 ppb (2022–2024) 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 235 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
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