285 S Rock River Rd is a 1,848 square foot house on a 7,792 square foot lot with 5 bedrooms and 2 bathrooms. - it last sold on October 02, 1978 for $70,000. Based on Redfin's Diamond Bar data, we estimate the home's value is $921,300.
Single-familyProperty Type
1964Year Built
7,792 sq ftLot Size
$499Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$921,300
$851K since sold in October 1978$3,000 since October
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 1.1% lower than the average sale price ($931K) of 5 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
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
Interior
Heating & Cooling
Heating Type: Central
Exterior
Property Information
Subdivision Name: 28429
Living Sq. Ft: 1,848
# of Units: 1
Legal Description: TRACT NO 28429 LOT 15
Lot Information
# of Buildings: 1
Land Sq. Ft: 7,792
Legal Lot Number: 15
Municipality Name: DIAMOND BAR
Acres: 0.1789
Zoning Code: LCR18000*
County Use Description: SINGLE FAMILY RESID
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 5
Baths: 2.0
Sq. Ft.: 1,848
Stories: —
Lot Size: 7,792 square feet
Style: Single Family Residential
Year Built: 1964
Year Renovated: 1965
County: Los Angeles County
APN: 8718032001
Home facts updated by county records on Oct 7, 2026
Around this home
Schools
K - 12
Preschool & daycare
Armstrong Elementary School
Public K-6 • Assigned • 0.1mi
5/10
Lorbeer Middle School
Public 7-8 • Assigned • 0.5mi
5/10
Diamond Ranch High School
Public 9-12 • Assigned • 2.2mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
The Diamond Bar market is shifting, creating new opportunities for both buyers and sellers. Buyers have a bit more negotiating room, while well-priced, well-maintained homes can still attract strong interest. If you’re considering a move, I’d be...
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