Contra Costa County property record for 321 Mount Palomar Pl, Clayton, CA 94517
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 2.5 ba · 2,694 sqft · built 1976 |
| Lot Size | 0.328 acres (14,300 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $910,000 (Mar 2018) |
| Tax Bill | $12,777 (2025) |
| Deeds & Mortgages | Jul 2026 Sale Sep 2023 Line of Credit + 4 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 119-412-018-2 |
| Primary APN | 119-412-018-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 12 Rooms |
| Stories | 1 Story |
| Building Area | 2,694 sqft Living Area |
| Gross Area | 3,232 sqft |
| 1st Floor Area | 2,694 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1976 |
|---|---|
| Effective Year Built | Effective 1977 |
| Architectural Style | Cluster |
| Exterior Material | Other |
| Construction Type | Concrete |
| Roof Material | Wood Shingle |
| Lot Area | 14,300 sqft (0.328 acres) |
| Garage Type | Attached |
| Garage Area | 538 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 321 MT PALOMAR PL |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-1639 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | P-1 |
| Legal Description | TRACT 4016 LOT 20 EX MR |
| Legal Subdivision | SUBDIVISION 4016 |
| Legal Tract | 4016 |
| Legal Lot Number | 20 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 4 |
| Census Block | 4000 |
| Census Tract | 355306 |
Source: Contra Costa County records, as of October 9, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | 321 MT PALOMAR PL, CLAYTON, CA 94517-1639 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Revocable Trust |
| Date | Document |
|---|---|
| Jul 16, 2026 | Grant Deed, Transfer NONE LISTED ON DOCUMENT |
| Sep 6, 2023 | Deed of Trust, Mortgage · Line of Credit DIGITAL FCU |
| Sep 16, 2020 | Deed of Trust, Mortgage · Conventional Mortgage COMMERCE HOME MORTGAGE LLC |
| Oct 22, 2021 | Deed of Trust, Mortgage · Conventional Mortgage CHANGE LENDING LLC |
| Mar 5, 2020 | Intrafamily Transfer, Transfer · Conventional Mortgage COMMERCE HOME MORTGAGE LLC |
| Mar 16, 2018 | Grant Deed, Transfer CASON HM LNS |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Mar 16, 2018 · Amount on Record |
| Deed Sale | Mar 16, 2018 · Amount on Record |
| Prior Sale | Dec 5, 2003 · Amount on Record |
| Deed Document Number | 201840625 |
| Last Transfer Date | Feb 27, 2020 |
| Transfer Doc | 0000042429 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jul 16, 2026 |
| Property Address | 321 MT PALOMAR PL, CLAYTON, CA 94517-1639 |
| Document Number | 0000075214 |
| Instrument Date | Jul 10, 2026 |
| Instrument | 202675214 |
| Transaction Type | Transfer |
| Record Updated | Aug 31, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 321 MT PALOMAR PL, CLAYTON, CA 94517-1639 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 321 MT PALOMAR PL, CLAYTON, CA 94517-1639 |
| Transaction Type | Mortgage |
| Record Updated | Sep 15, 2023 |
| Name | Verified Name |
|---|---|
| Address | 321 MT PALOMAR PL, CLAYTON, CA 94517-1639 |
| Document Number | 0000086141 |
|---|---|
| Date | Sep 6, 2023 |
| Instrument | 2023-086141 |
| Name | DIGITAL FCU |
|---|---|
| Type | Credit Union |
| Address | MARLBOROUGH, MA 01752 |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Term | 479 Months |
| Due | Aug 25, 2063 |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 321 MT PALOMAR PL, CLAYTON, CA 94517-1639 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIDELITY TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 321 MT PALOMAR PL, CLAYTON, CA 94517-1639 |
| Document Number | 0000206198 |
|---|---|
| Date | Sep 16, 2020 |
| Instrument | 2020-206198 |
| Name | COMMERCE HOME MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Address | IRVINE, CA 92606 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Oct 1, 2050 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 321 MT PALOMAR PL, CLAYTON, CA 94517-1639 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | CHICAGO TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 321 MT PALOMAR PL, CLAYTON, CA 94517-1639 |
| Document Number | 0000297407 |
|---|---|
| Date | Oct 22, 2021 |
| Instrument | 2021-297407 |
| Name | CHANGE LENDING LLC |
|---|---|
| Type | Mortgage Company |
| Address | IRVINE, CA 92606 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Nov 1, 2051 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Mar 5, 2020 |
| Property Address | 321 MT PALOMAR PL, CLAYTON, CA 94517-1639 |
| Document Number | 0000042429 |
| Map Reference | MB 183 PG 11 |
| Instrument Date | Feb 27, 2020 |
| Instrument | 2020-042429 |
| Transaction Type | Transfer |
| Record Updated | Jul 27, 2021 |
| Title Company | FIDELITY NATIONAL TITLE CO |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property with Right of Survivorship |
| Address | 321 MT PALOMAR PL, CLAYTON, CA 94517-1639 |
| Document Number | 0000042430 |
|---|---|
| Date | Mar 5, 2020 |
| Instrument | 2020-042430 |
| Name | COMMERCE HOME MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Mar 1, 2050 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Mar 16, 2018 |
| Property Address | 321 MT PALOMAR PL, CLAYTON, CA 94517-1639 |
| Document Number | 0000040625 |
| Instrument Date | Mar 13, 2018 |
| Instrument | 40625 |
| Transaction Type | Transfer |
| Record Updated | Mar 23, 2018 |
| Title Company | LAWYERS TITLE/NTHRN CA |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $1,001.00 |
| Amount Accuracy | Full Value |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property |
| Address | 321 MT PALOMAR PL CLAYTON CA 945171639, CLAYTON, CA 94517-1639 |
| Document Number | 40626 |
|---|---|
| Date | Mar 16, 2018 |
| Instrument | 40626 |
| Name | CASON HM LNS |
|---|---|
| Type | Funding / Finance Company |
| Address | SAN RAMON, CA 94583 |
| Amount | Amount Recorded |
|---|---|
| Term | 360 Months |
| Due | Mar 15, 2048 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Clayton City |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,056,126 (+2%) Land $522,260 Building $533,866 | |
| 2025 | $12,777.00 (+4.29%) | $1,035,419 (+4.04%) Land $512,020 Building $523,399 |
| 2023 | $12,251.00 (+1.22%) | $995,215 Land $492,139 Building $503,076 |
| 2022 | $12,103.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 64% of the US · lower than 60% of California |
|---|---|
| Wildfire Likelihood | 0.2% 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 | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) 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 420 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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