First time on the market in 43 years & located on one of the LARGEST Lots in the tract, come see this Beautiful 1-story home in Diamond Bar! 3 BIG bedrooms and 2 Baths along with a Formal Living Room, Dining Room and immensely large Family Room! The Kitchen is spacious with an extra large counter top. The flooring has been upgraded as well as having UPGRADED dual-pane Windows throughout, NEW AC and Heater plus new air ducts, NEW wood fencing on one side, Spacious Patio as well as plenty of grass area for playing or even building a pool. Views to the mountains and even to Cal Poly University from the front of the home! Diamond Bar is on the list of top places to live in California according to Money Magazine! Easy access to the 57/60/10/71 freeways. Close enough to Cal Poly, Cal State Fullerton and Mt SAC. This home is wonderful and you'll enjoy seeing it!
Single-familyProperty Type
1975Year Built
0.27 acresLot Size
$596Est. Price/Sq.Ft.
2 car garageParking
Listed by Gilbert Rivera•DRE #01213587• Marketing Specialists
Bought with THOMAS MITCHELL•DRE #01451425• REALTY ASSET SERVICES
First time on the market in 43 years & located on one of the LARGEST Lots in the tract, come see this Beautiful 1-story home in Diamond Bar! 3 BIG bedrooms and 2 Baths along with a Formal Living Room, Dining Room and immensely large Family Room! The Kitchen is spacious with an extra large counter top. The flooring has been upgraded as well as having UPGRADED dual-pane Windows throughout, NEW AC and Heater plus new air ducts, NEW wood fencing on one side, Spacious Patio as well as plenty of grass area for playing or even building a pool. Views to the mountains and even to Cal Poly University from the front of the home! Diamond Bar is on the list of top places to live in California according to Money Magazine! Easy access to the 57/60/10/71 freeways. Close enough to Cal Poly, Cal State Fullerton and Mt SAC. This home is wonderful and you'll enjoy seeing it!
Public Records
Mar 12, 1976
Sold
$40,900
$25/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$9,371 (+7.7%)
$546,820 + $136,703
$683,523
2024
$8,699 (+2.0%)
$546,820 + $136,703
$683,523
2023
$8,531 (+1.5%)
$536,099 + $134,023
$670,122
2022
$8,402 (+2.2%)
$525,588 + $131,396
$656,984
2021
$8,219 (+0.3%)
$515,283 + $128,820
$644,103
2020
$8,192 (+274.9%)
$505,180 + $126,295
$631,475
2019
$2,185 (−53.2%)
$500,000 + $125,000
$625,000
2018
$4,669 (+0.8%)
$27,432 + $98,167
$125,599
2017
$4,634 (+158.2%)
$26,368 + $94,356
$120,724
2016
$1,795 (+0.8%)
$26,368 + $94,356
$120,724
2015
$1,780 (+0.2%)
$25,851 + $92,506
$118,357
2014
$1,777 (+1.3%)
$24,965 + $89,333
$114,298
2012
$1,754 (+3.1%)
$24,853 + $88,930
$113,783
2011
$1,700 (+0.9%)
$24,366 + $87,187
$111,553
2010
$1,685 (+3.1%)
$23,889 + $85,478
$109,367
2009
$1,634 (+5.1%)
$23,711 + $84,840
$108,551
2008
$1,556
$23,768 + $85,042
$108,810
Tax history for 428 Rockbridge Rd
Year
Property tax
Land + Additions
Assessment*
2025
$9,371 (+7.7%)
$546,820 + $136,703
$683,523
2024
$8,699 (+2.0%)
$546,820 + $136,703
$683,523
2023
$8,531 (+1.5%)
$536,099 + $134,023
$670,122
2022
$8,402 (+2.2%)
$525,588 + $131,396
$656,984
2021
$8,219 (+0.3%)
$515,283 + $128,820
$644,103
2020
$8,192 (+274.9%)
$505,180 + $126,295
$631,475
2019
$2,185 (−53.2%)
$500,000 + $125,000
$625,000
2018
$4,669 (+0.8%)
$27,432 + $98,167
$125,599
2017
$4,634 (+158.2%)
$26,368 + $94,356
$120,724
2016
$1,795 (+0.8%)
$26,368 + $94,356
$120,724
2015
$1,780 (+0.2%)
$25,851 + $92,506
$118,357
2014
$1,777 (+1.3%)
$24,965 + $89,333
$114,298
2012
$1,754 (+3.1%)
$24,853 + $88,930
$113,783
2011
$1,700 (+0.9%)
$24,366 + $87,187
$111,553
2010
$1,685 (+3.1%)
$23,889 + $85,478
$109,367
2009
$1,634 (+5.1%)
$23,711 + $84,840
$108,551
2008
$1,556
$23,768 + $85,042
$108,810
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Public record
Public record
Zoning
Beds
3
Baths
2
Stories
—
Lot width
—
Lot depth
—
Lot size
0.27 Acres
Year renovated
1975
Sq. Ft.
1,636
Year built
1975
Style
Single Family Residential
County
Los Angeles County
APN
8718019015
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Aug 30, 2026.
RLM
Low/Medium Density Residential District
The RLM zoning district is intended primarily for existing subdivided areas developed with detached single-family dwellings. The maximum allowed density for new residential subdivisions within this zoning district will be five dwellings per gross acre. The RLM zoning district is consistent with the low density residential land use category of the general plan.
Permitted uses
Include but are not limited to:
Housing-Single unit
Housing-Senior
Housing-Other
Infrastructure
Fire house
Police station
Park & open space
Property details
Parking
Parking / Garage Information
Attached Garage
# of Garage Spaces: 2
Garage
Has Parking
# of Parking Spaces: 2
Interior
Laundry Information
Has Laundry
In Garage
Bathroom Information
# of Baths (Full): 2
Cooling Information
Central
Has Cooling
Room Information
All Bedrooms Down, Family Room, Great Room, Kitchen, Living Room
Fireplace Information
Family Room, Living Room
Has Fireplace
Heating Information
Central Furnace
Has Heating
Interior Features
Levels: One
Main Level Bathrooms: 2
Main Level Bedrooms: 3
Window Features: Double Pane Windows
Exterior
Exterior Information
Structure Type: House
Exterior Features
Patio And Porch Features: Covered
Has Patio
Pool Features: None
Lot Information
Elevation Units: Feet
Lot Size Source: Assessor's Data
Lot Features: Back Yard, Front Yard, Lot 10000-19999 Sqft
Property Information
Total # of Units: 1
Common Walls: No Common Walls
Parcel Number: 8718019015
Total # of Stories: 1
Has View
Year Built Source: Assessor
Financial
Assesments Information
Assessments: Unknown
Utilities
Utilities Information
Sewer: Public Sewer
Water Source: District/Public
Location
Neighborhood Information
Community Features: Sidewalks, Street Lighting, Suburban
School Information
High School District: Other
Location Information
Latitude: 34.02804500
Longitude: -117.81831700
Directions: Prospectors and Sunset Crossing
Zoning: LCR18000*
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,636
Stories: —
Lot Size: 0.27 acres
Style: Single Family Residential
Year Built: 1975
Year Renovated: 1975
County: Los Angeles County
APN: 8718019015
Home facts updated by county records on Aug 30, 2026
Other
Listing Information
Days Active in MLS: 4
Continuous Days Active in MLS: 4
Listing Agent Information
List Agent First Name: Gilbert
List Agent Last Name: Rivera
Listing Office Information
List Office Name: Marketing Specialists
Selling Agent Information
Buyer Agent First Name: THOMAS
Buyer Agent Last Name: MITCHELL
Selling Office Information
Buyer Office Name: REALTY ASSET SERVICES
Around this home
Schools
Armstrong Elementary School
Public K-6 • Assigned • 0.5mi
5/10
Lorbeer Middle School
Public 7-8 • Assigned • 0.9mi
5/10
Diamond Ranch High School
Public 9-12 • Assigned • 2.3mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
2/10 Fire Factor
0.00% chance of being in a wildfire in next 30 years
7/10 Heat Factor
7 days above 99° expected this year, 20 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
6/10 Air Factor
10 unhealthy days expected this year, 13 days in 30 years
Provided by First Street
Historical weather
Diamond Bar, CA • 91765
Average low and high temperatures (°F)
68
50
71
52
73
53
72
53
76
57
81
60
86
63
89
65
85
65
80
59
71
52
69
51
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 10.1 hours in
June and 6.8 hours in December, placing it above the
U.S. average for solar exposure.
10.1 hrs
6.8 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$927,000 – $1.12M
Reach more buyers when you sell with Redfin. Save up to $9,755 in fees.3 minutes to get started.