521 Deep Hill Rd is a 1,260 square foot house on a 8,688 square foot lot with 3 bedrooms and 2 bathrooms. Based on Redfin's Diamond Bar data, we estimate the home's value is $836,436.
Single-familyProperty Type
1976Year Built
8,688 sq ftLot Size
$664Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$836,436
$7,000 since October
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 1.3% lower than the average sale price ($848K) of 6 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
$4,045 (+9.6%)
$134,650 + $134,306
$268,956
2024
$3,690 (+1.9%)
$132,010 + $131,673
$263,683
2023
$3,622 (+1.6%)
$129,422 + $129,092
$258,514
2022
$3,563 (+2.3%)
$126,885 + $126,561
$253,446
2021
$3,483 (+0.4%)
$124,398 + $124,080
$248,478
2020
$3,470 (−2.2%)
$121,959 + $121,648
$243,607
2019
$3,547 (+8.6%)
$120,709 + $120,401
$241,110
2018
$3,267 (+1.8%)
$118,343 + $118,041
$236,384
2017
$3,210 (+4.6%)
$113,749 + $113,458
$227,207
2016
$3,068 (+0.8%)
$113,749 + $113,458
$227,207
2015
$3,043 (+0.5%)
$111,519 + $111,234
$222,753
2014
$3,028 (+0.8%)
$107,693 + $107,418
$215,111
2012
$3,003 (+3.1%)
$107,207 + $106,933
$214,140
2011
$2,913 (+0.7%)
$105,105 + $104,837
$209,942
2010
$2,893 (+2.8%)
$103,045 + $102,782
$205,827
2009
$2,813 (+5.0%)
$102,275 + $102,014
$204,289
2008
$2,680
$102,518 + $102,257
$204,775
Tax history for 521 Deep Hill Rd
Year
Property tax
Land + Additions
Assessment*
2025
$4,045 (+9.6%)
$134,650 + $134,306
$268,956
2024
$3,690 (+1.9%)
$132,010 + $131,673
$263,683
2023
$3,622 (+1.6%)
$129,422 + $129,092
$258,514
2022
$3,563 (+2.3%)
$126,885 + $126,561
$253,446
2021
$3,483 (+0.4%)
$124,398 + $124,080
$248,478
2020
$3,470 (−2.2%)
$121,959 + $121,648
$243,607
2019
$3,547 (+8.6%)
$120,709 + $120,401
$241,110
2018
$3,267 (+1.8%)
$118,343 + $118,041
$236,384
2017
$3,210 (+4.6%)
$113,749 + $113,458
$227,207
2016
$3,068 (+0.8%)
$113,749 + $113,458
$227,207
2015
$3,043 (+0.5%)
$111,519 + $111,234
$222,753
2014
$3,028 (+0.8%)
$107,693 + $107,418
$215,111
2012
$3,003 (+3.1%)
$107,207 + $106,933
$214,140
2011
$2,913 (+0.7%)
$105,105 + $104,837
$209,942
2010
$2,893 (+2.8%)
$103,045 + $102,782
$205,827
2009
$2,813 (+5.0%)
$102,275 + $102,014
$204,289
2008
$2,680
$102,518 + $102,257
$204,775
*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
View Information
View: Good
Property Information
Subdivision Name: 28065
Living Sq. Ft: 1,260
# of Units: 1
Legal Description: TRACT NO 28065 LOT 15
Lot Information
# of Buildings: 1
Land Sq. Ft: 8,688
Legal Lot Number: 15
Municipality Name: DIAMOND BAR
Acres: 0.1994
Depth Footage: 143
Front Footage: 60
Zoning Code: LCR18000*
County Use Description: SINGLE FAMILY RESID
Utility Information
Water Service Type: Public
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,260
Stories: —
Lot Size: 8,688 square feet
Style: Single Family Residential
Year Built: 1976
Year Renovated: 1976
County: Los Angeles County
APN: 8718020009
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 • 0.6mi
5/10
Lorbeer Middle School
Public 7-8 • Assigned • 1.0mi
5/10
Diamond Ranch High School
Public 9-12 • Assigned • 2.4mi
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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