Los Angeles County property record for 623 Mount St, Diamond Bar, CA 91765 · Last verified June 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 4 Beds |
| Bathrooms | 2 Baths |
| Year Built | Built 1972 |
| Square Footage | 1,708 sqft Living Area |
| Lot Size | 8,025 sqft (0.184 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $601,000 (2016) |
| Tax Bill | $9,735.00 (2025) |
| Primary APN | 8717-021-015 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 11 Rooms |
| Building Area | 1,708 sqft Living Area |
| Stories | 1 Stories |
| Fireplace | Fireplace |
| Fireplaces | 1 Fireplaces |
| Year Built | Built 1972 |
|---|---|
| Effective Year Built | Effective 1972 |
| Architectural Style | Conventional Style |
| Exterior Material | Stucco Exterior |
| Construction Type | Wood Construction |
| Roof Construction | Gable Roof Construction |
| Roof Material | Wood Shingle Roof |
| Lot Area | 8,025 sqft (0.184 acres) |
| Depth X Width | 135 ft x 61 ft Depth x Width |
| Garage Type | Attached Garage |
| Cooling System | Central Cooling |
|---|---|
| Heating System | Central Heating |
| Street Address | 623 MOUNT ST |
|---|---|
| City | DIAMOND BAR |
| State | CA |
| Zip | 91765-1939 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | TRACT NO 31139 LOT 15 |
| Legal Subdivision | 31139 |
| Legal Tract | 31139 |
| Legal Block | 2 |
| Legal Lot Number | 15 |
| Jurisdiction | LOS ANGELES CA |
| Minor Civil Division | EAST SAN GABRIEL VALLEY |
| Census Blockgroup | 2 |
| Census Block | 2001 |
| Census Tract | 403319 |
Source: Los Angeles County records · APN 8717-021-015
Assessment roll updated May 21, 2026 · Last verified June 2026
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 |
|---|---|
| Mailing Address | 623 MOUNT ST, DIAMOND BAR, CA 91765-1939 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Vesting | Sole Owner |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Apr 29, 2016 · Amount on Record |
| Deed Sale | Apr 29, 2016 · Amount on Record |
| Deed Doc Number | 2016490002 |
| Prior Transfer Date | Mar 31, 2016 |
| Prior Transfer Doc | 0000490003 |
| Record Refreshed | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Property Address | 623 MOUNT ST, DIAMOND BAR, CA 91765-1939 |
| Document Number | 0001151988 |
| Instrument Date | Sep 27, 2017 |
| Transaction Type | Mortgage |
| Record Updated | Oct 13, 2017 |
| Title Company | FIRST AMERICAN TITLE, FIRST AMERICAN TITLE INSURANCE |
| Name | Verified Name |
|---|---|
| Relationship | Separate Estate/Property |
| Address | 623 MOUNT ST DIAMOND BAR CA 917651939, DIAMOND BAR, CA 91765-1939 |
| Document Number | 0001151988 |
|---|---|
| Date | Oct 10, 2017 |
| Instrument | 1151988 |
| Name | BANK OF THE WEST |
|---|---|
| Type | Bank |
| Address | SOUTH PASADENA, CA 91030 |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Oct 09, 2047 |
| Rate Type | Adjustable Rate |
|---|
Source: Los Angeles County records · Assessment roll updated May 21, 2026 · Last verified June 2026
| Type | Name |
|---|---|
| State | California |
| County | Los Angeles County |
| Municipality | Diamond Bar City |
| Unified School District | Pomona 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 | $9,735.00 (+10.73%) | $711,453 (+4.04%) Land $509,738 Building $201,715 |
| 2023 | $8,792.00 (+1.56%) | $683,829 Land $489,946 Building $193,883 |
| 2022 | $8,657.00 |
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