256 S Rock River Rd is a 1,258 square foot house on a 6,650 square foot lot with 3 bedrooms and 2 bathrooms. Based on Redfin's Diamond Bar data, we estimate the home's value is $748,372.
Single-familyProperty Type
1964Year Built
6,650 sq ftLot Size
$595Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$748,372
$7,000 since October
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 13.8% lower than the average sale price ($868K) of 5 comparable homes.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2025
$2,764 (+10.1%)
$54,260 + $109,714
$163,974
2024
$2,510 (+1.8%)
$53,197 + $107,563
$160,760
2023
$2,467 (+1.7%)
$52,154 + $105,454
$157,608
2022
$2,425 (+2.4%)
$51,132 + $103,387
$154,519
2021
$2,370 (+0.4%)
$50,130 + $101,360
$151,490
2020
$2,360 (−1.9%)
$49,148 + $99,373
$148,521
2019
$2,405 (+10.5%)
$48,645 + $98,355
$147,000
2018
$2,175 (+1.8%)
$47,692 + $96,427
$144,119
2017
$2,137 (+4.7%)
$45,841 + $92,684
$138,525
2016
$2,041 (+0.8%)
$45,841 + $92,684
$138,525
2015
$2,024 (+0.3%)
$44,943 + $90,867
$135,810
2014
$2,018 (+5.6%)
$43,401 + $87,750
$131,151
2012
$1,911 (+3.2%)
$43,205 + $87,354
$130,559
2011
$1,852 (+0.9%)
$42,358 + $85,642
$128,000
2010
$1,836 (+3.1%)
$41,528 + $83,963
$125,491
2009
$1,782 (+5.2%)
$41,218 + $83,336
$124,554
2008
$1,694
$41,316 + $83,534
$124,850
Tax history for 256 S Rock River Rd
Year
Property tax
Land + Additions
Assessment*
2025
$2,764 (+10.1%)
$54,260 + $109,714
$163,974
2024
$2,510 (+1.8%)
$53,197 + $107,563
$160,760
2023
$2,467 (+1.7%)
$52,154 + $105,454
$157,608
2022
$2,425 (+2.4%)
$51,132 + $103,387
$154,519
2021
$2,370 (+0.4%)
$50,130 + $101,360
$151,490
2020
$2,360 (−1.9%)
$49,148 + $99,373
$148,521
2019
$2,405 (+10.5%)
$48,645 + $98,355
$147,000
2018
$2,175 (+1.8%)
$47,692 + $96,427
$144,119
2017
$2,137 (+4.7%)
$45,841 + $92,684
$138,525
2016
$2,041 (+0.8%)
$45,841 + $92,684
$138,525
2015
$2,024 (+0.3%)
$44,943 + $90,867
$135,810
2014
$2,018 (+5.6%)
$43,401 + $87,750
$131,151
2012
$1,911 (+3.2%)
$43,205 + $87,354
$130,559
2011
$1,852 (+0.9%)
$42,358 + $85,642
$128,000
2010
$1,836 (+3.1%)
$41,528 + $83,963
$125,491
2009
$1,782 (+5.2%)
$41,218 + $83,336
$124,554
2008
$1,694
$41,316 + $83,534
$124,850
*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: 1,258
# of Units: 1
Legal Description: TRACT NO 28429 LOT 10
Lot Information
# of Buildings: 1
Land Sq. Ft: 6,650
Legal Lot Number: 10
Municipality Name: DIAMOND BAR
Acres: 0.1527
Depth Footage: 90
Front Footage: 73
Zoning Code: LCR18000*
County Use Description: SINGLE FAMILY RESID
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,258
Stories: —
Lot Size: 6,650 square feet
Style: Single Family Residential
Year Built: 1964
Year Renovated: 1964
County: Los Angeles County
APN: 8718034008
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 • 0.4mi
5/10
Diamond Ranch High School
Public 9-12 • Assigned • 2.1mi
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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