Los Angeles County  »  638 Mount St

638 Mount Street, Diamond Bar, CA 91765 - Property report

Also known as: 638 Mount St

Property image for 638 Mount Street, Diamond Bar, CA 91765
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Property type

Single Family Residence with Pool (0101)

Year built

1972

Acreage

0.222

Sale price

$990,000

General Information

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Access up-to-date information from property owner names to sales history, deeds, tax info, mortgages, development data, planimetric maps and more.

Address
Primary address
638 Mount St
Diamond Bar, CA 91765
Zip code
91765
County
Los Angeles
Municipality
Diamond Bar

Owner

Find out who owns 638 Mount Street, Diamond Bar, CA 91765. Uncover corporate and individual owners with a free account.

Building
Property type
Single Family Residence with Pool
Building sq. ft.
2,610
Buildings on lot
1
Year built
1972
Last altered
Bedrooms
4
Bathrooms
3
HVAC
Central refrigeration & heating
Pool
Yes
Sales
Sale date
06/15/2021
Sale price
$990,000
Arm's length
Tax
Tax year
2026-2027
Property tax
$13,957
Tax per sq. ft.
$5
Zoning & use
Zoning
Low Medium Density Residential (RLM)
Units
1
Lot
Acreage
0.222

Area overview

Walk score
39 /100.  Car-Dependent
Transit score
0 /100.  Minimal Transit
Bike score
10 /100.  Somewhat Bikeable
School district
Pomona Unified School District
Weed hazard
No
Ownership

Ownership information for 638 Mount Street, Diamond Bar, CA

Property owner name
Registered owner
Source
Deed
Owner contact information
Phone number
Owner address
Documents

Sales history for 638 Mount Street, Diamond Bar, CA 91765

Sale date Sale price Buyer name Seller name
06/15/2021 $990,000 XXXX XXXX X; XXXX XXXX XXXXX XXXXX X XXXXXXX; XXX XXXXX X XXXXX XXX XXXX X XXXXX XXXXXXXXX XXXXX; XXXXX XXXX X XXXXXXX

*Most recent sale on record for this property.

More about Los Angeles County property records.

Title documents

Date Type Amount Party 1 Party 2
06/29/2021 Reconveyance
Substitution Trustee		 XXXXX XXXXX X XXXXX XXXXX X
06/18/2021 Notice XXX XXXXX XX
06/15/2021 Trust Deed XXXX XXXX X XXXXXXX XXXXX XXX
06/15/2021 Grant Deed
(Sale for consideration - full DTT - Single parcel sale)		 XXXXX XXXXX X XXXXXXX XXXX XXXX X
06/15/2021 Cancellation Notice XXXXX XXXXX XXXXX
09/17/2020 Grant Deed
(File correction - Single parcel sale)		 XXXXX XXXXX X XXXXX XXXXX X XXXXXXX
08/04/2020 Reconveyance XXXXXXX XXXX XXXXX XXXXX X
08/04/2020 Reconveyance XXXXXXX XXXX XXXXX XXXXX X
07/07/2020 Notice XXXXX XXXXX XXXXX
07/07/2020 Trust Deed XXXXX XXXXX X XXXXX XXXXXXXX XXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 638 Mount Street, Diamond Bar, CA

Property tax data includes tax amount, market value and assessed value, exemptions, abatements and assessment history.

Current property tax
Tax year
2026-2027
Base tax
$13,957
Current property tax
$14,926
Tax per sq. ft.
$5
Recent tax assessments
Market value
$1,114,896
Land value
$725,022
Building value
$389,874

More about Los Angeles County property taxes

Assessment history

See the assessment and property tax history, including the evolution of the total tax rate and corresponding property tax amount.

Tax year Assessed value Tax rate Property tax Y-o-Y change
2025-2026 $1,093,036 1.2519 $13,684 +7.58%
2024-2025 $1,071,605 1.187 $12,720 +2.08%
2023-2024 $1,050,594 1.1861 $12,461 +1.50%
2022-2023 $1,029,995 1.192 $12,278 +166.15%
2021-2022 $387,633 1.1901 $4,613 +0.29%
2020-2021 $383,661 1.198895 $4,600 -0.85%
2019-2020 $368,765 1.25802 $4,639 +7.18%
2018-2019 $361,535 1.1973 $4,329 +1.76%
2017-2018 $354,447 1.2001 $4,254 +4.52%
2016-2017 $347,498 1.1712 $4,070 +0.88%

Special assessments & penalties for 638 Mount Street, Diamond Bar, CA

Code Description Tax levied
00747 Consolidated Fire Protection District Of La County- Measure E
06221 County Sanitation District #21
14651 Diamond Bar District #38
02824 Diamond Bar Lighting District
06181 Greater L.A. County Vector Control District
03694 La County Regional Park And Open Space District
00744 Los Angeles County Fire Department
03071 Los Angeles County Flood Control
04000 Los Angeles County Sewer Maintenance
00170 Los Angeles County Trauma/Emerg Srvs
33011 Mwd Water Standby Charge #2
00177 Safe Clean Water Program Funding Measure W
36551 Three Valleys Mwd Standby Charge
37092 Walnut Valley Water Standby
Permits

Permit information for 638 Mount Street, Diamond Bar, CA

No recently recorded permits for this property.

More about Los Angeles County property records

Neighborhood

Diamond Bar residential market stats

Access a detailed real estate market overview of Diamond Bar so you can assess current trends, home values, types of properties sold and transaction volume. View the median home sale price in Diamond Bar and compare it to other neighborhoods in Los Angeles.

Median sale price

$1,012,500

10.3% Y-o-Y

Median price/sq. ft.

$566

0.4% Y-o-Y

Los Angeles county median sale price

$870,000

-0.6% Y-o-Y

Check out recently sold homes in Diamond Bar and see how their prices compare.

Risk

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FEMA flood zones

FEMA flood zones
X
Landslides and liquefaction map

Fire hazard zones

Faults and tsunami inundation zones map
Crime incidents map

Transportation

Daily traffic map
View daily traffic map

Access the detailed traffic volume map for 638 Mount Street, Diamond Bar, CA 91765 to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.

Schools

Nearest elementary schools

Name Rating Type Grade range No of students Distance (miles)
La Petite Academy NR Private K 0 0.48
Mt. Calvary Lutheran School NR Private PK-8 192 0.51
Mt. Calvary Lutheran School NR Private PK-8 192 0.51
Village Montessori Academy NR Private K 24 0.63
Armstrong Elementary School 6 Public K-6 257 0.83
Diamond Bar Montessori Academy NR Private K-3 0 0.95
Quail Summit Elementary School 9 Public K-5 665 1.03
Maple Hill Elementary School 9 Public K-5 562 1.12
Pantera Elementary School 9 Public K-6 466 1.25
Golden Springs Elementary School 7 Public K-6 413 1.27
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
Mt. Calvary Lutheran School NR Private PK-8 192 0.51
Lorbeer Middle School 5 Public 7-8 623 0.60
Chaparral Middle School 9 Public 6-8 1,133 0.92
Wisdom Kids College NR Private K-8 0 1.51
Institute of Knowledge NR Private K-10 265 1.57
Institute Of Knowledge NR Private K-8 127 1.61
Suzanne Middle School 8 Public 6-8 1,120 2.32
South Pointe Middle School 8 Public 6-8 879 2.37
Walnut Valley Adult NR Public 0 2.43
International Cross Academy NR Private 1-12 0 2.90
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Institute of Knowledge NR Private K-10 265 1.57
Diamond Ranch High School 7 Public 9-12 1,547 2.18
Walnut High School 10 Public 9-12 2,158 2.28
Walnut Valley Adult NR Public 0 2.43
Ron Hockwalt Academies (Continuation) School NR Public 9-12 41 2.51
Diamond Bar High School 10 Public 9-12 2,557 2.59
International Cross Academy NR Private 1-12 0 2.90
Aims Academy NR Private 1-12 0 3.06
International Polytechnic High School 9 Public 9-12 483 3.51
Elite Open School NR Private 5-12 43 3.65

Data provided by GreatSchools.org © 2026. All rights reserved.

Neighbors for 638 Mount Street, Diamond Bar, CA

608 Mount St, Diamond Bar 623 Mount St, Diamond Bar 620 Hopi St, Diamond Bar 620 Mount St, Diamond Bar 608 Hopi St, Diamond Bar 771 Golden Prados Dr, Diamond Bar 777 Golden Prados Dr, Diamond Bar 637 Mount St, Diamond Bar 617 Mount St, Diamond Bar 602 Hopi St, Diamond Bar 630 Mount St, Diamond Bar 624 Mount St, Diamond Bar 607 Mount St, Diamond Bar 634 Mount St, Diamond Bar 612 Mount St, Diamond Bar 781 Golden Prados Dr, Diamond Bar 636 Mount St, Diamond Bar 633 Mount St, Diamond Bar 611 Mount St, Diamond Bar 614 Hopi St, Diamond Bar

Nearby ZIP codes for 638 Mount Street, Diamond Bar, CA

91722, Los Angeles County, CA 91723, Los Angeles County, CA 91724, Los Angeles County, CA 91744, Los Angeles County, CA 91748, Los Angeles County, CA 91768, Los Angeles County, CA 91773, Los Angeles County, CA 92821, Orange County, CA

Frequently asked questions

What is the year built for 638 Mount Street, Diamond Bar, CA 91765?

The development at 638 Mount Street, Diamond Bar, CA 91765 was built in 1972.

What is the total square footage of 638 Mount Street, Diamond Bar, CA 91765?

638 Mount Street, Diamond Bar, CA 91765 has a total of 2,610 square feet.

When was 638 Mount Street, Diamond Bar, CA 91765 last sold and what was the sale price?

638 Mount Street, Diamond Bar, CA 91765 was last sold on 06/15/2021 for $990,000.

What is the assessed value of 638 Mount Street, Diamond Bar, CA 91765?

638 Mount Street, Diamond Bar, CA 91765 is currently assessed at $1,093,036.

What are the property taxes for 638 Mount Street, Diamond Bar, CA 91765?

The property taxes for 638 Mount Street, Diamond Bar, CA 91765 total $13,683.

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