San Joaquin County property record for 31187 S Koster Rd, Tracy, CA 95304
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,468 sqft · built 2006 |
| Lot Size | 1.5 acres (65,340 sqft) |
| Owner | Company Name on Record |
| Last Sale | $776,000 (Feb 2007) |
| Tax Bill | $12,314 (2026) |
| Deeds & Mortgages | May 2021 Mortgage Apr 2017 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 255-310-160-000 |
| Primary APN | 255-310-160-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 2,468 sqft Living Area |
| 1st Floor Area | 2,468 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 2006 |
|---|---|
| Effective Year Built | Effective 2006 |
| Architectural Style | Custom Design |
| Construction Type | Wood |
| Lot Area | 65,340 sqft (1.5 acres) |
| Garage Area | 759 sqft |
| Parking Spaces | 3 Parking Spaces |
| Pool Type | Pool with Hot Tub/Spa |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Water Source | Well |
| Old Parcel Number | 255-310-16 |
|---|---|
| Street Address | 31187 S KOSTER RD |
| City | TRACY |
| State | CA |
| Zip | 95304-8822 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | AU20 |
| Legal Description | REDRAW 901115 FR ORIG APN 255110165 |
| Legal Block | 1 |
| Legal Lot Number | 8 |
| Jurisdiction | SAN JOAQUIN CA |
| Township / Civil Division | TRACY |
| Census Block Group | 1 |
| Census Block | 1005 |
| Census Tract | 5503 |
Source: San Joaquin County records, as of October 13, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 31187 S KOSTER RD, TRACY, CA 95304-8822 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Date | Document |
|---|---|
| May 27, 2021 | Deed of Trust, Mortgage · Conventional Mortgage GUARANTEED RATE INC |
| Apr 5, 2017 | Quit Claim Deed, Transfer ATTORNEY ONLY |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Feb 21, 2007 · Amount on Record |
| Deed Sale | Feb 21, 2007 · Amount on Record |
| Prior Sale | Nov 17, 2005 · Amount on Record |
| Deed Document Number | 200737285 |
| Last Transfer Date | Mar 15, 2017 |
| Transfer Doc | 0000038513 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN JOAQUIN CA |
| Property Address | 31187 S KOSTER RD, TRACY, CA 95304-8822 |
| Transaction Type | Mortgage |
| Record Updated | Jul 25, 2022 |
| Title Company | WFG LENDER SERVICES, WFG LENDER SERVICES RESWARE |
| Name | Verified Name |
|---|---|
| Address | 31187 S KOSTER RD, TRACY, CA 95304-8822 |
| Document Number | 0000092841 |
|---|---|
| Date | May 27, 2021 |
| Instrument | 2021-092841 |
| Name | GUARANTEED RATE INC |
|---|---|
| Type | Mortgage Company |
| Address | CHICAGO, IL 60613 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Jun 1, 2051 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | SAN JOAQUIN CA |
| Recording Date | Apr 5, 2017 |
| Property Address | 31187 S KOSTER RD, TRACY, CA 95304-8822 |
| Document Number | 0000038513 |
| Instrument Date | Mar 15, 2017 |
| Instrument | 38513 |
| Transaction Type | Transfer |
| Record Updated | Apr 18, 2017 |
| Title Company | ATTORNEY ONLY |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 31187 S KOSTER RD TRACY CA 953048822, TRACY, CA 95304-8822 |
Source: San Joaquin County assessment roll, as of September 24, 2025
| Type | Name |
|---|---|
| State | California |
| County | San Joaquin County |
| Secondary School District | Tracy Unified School District (9-12) (09 - 12) |
| Elementary School District | New Jerusalem Elementary School District (KG - 08) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $12,314.00 (+3.8%) | ||
| 2025 | $11,863.00 (+49.63%) Homeowner's exemption | $1,132,389 (+49.19%) Land $415,334 Building $717,055 | |
| 2023 | $7,928.00 (-0.16%) Homeowner's exemption | $759,000 Land $120,000 Building $639,000 | $863,280 |
| 2022 | $7,941.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
Source: FEMA National Flood Hazard Layer, effective September 27, 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 |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 3 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 | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: FCC Broadband Data Collection, based on 57 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| ezWave Fixed Wireless | 1,000 / 200 |
| Matrix Broadband Fixed Wireless | 400 / 80 |
| unWired Broadband Fixed Wireless | 400 / 50 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| Cal.net Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 25 / 3 |
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