21217 Cold Spring Ln is a 1,798 square foot house on a 7,377 square foot lot with 3 bedrooms and 2 bathrooms. - it last sold on September 18, 1992 for $185,000. Based on Redfin's Diamond Bar data, we estimate the home's value is $928,562.
Single-familyProperty Type
1964Year Built
7,377 sq ftLot Size
$516Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$928,562
$744K since sold in September 1992$6,000 since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 3.1% lower than the average sale price ($958K) of 6 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
Air Conditioning Type: Wall Unit
Heating Type: Central
Exterior
Property Information
Subdivision Name: 25985
Living Sq. Ft: 1,798
# of Units: 1
Legal Description: TRACT NO 25985 LOT 104
Lot Information
# of Buildings: 1
Land Sq. Ft: 7,377
Legal Lot Number: 104
Municipality Name: DIAMOND BAR
Acres: 0.1694
Depth Footage: 150
Front Footage: 70
Zoning Code: LCR171/2
County Use Description: SINGLE FAMILY RESID
Financial
Assessor Information
Assessment Year: 2025
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,798
Stories: —
Lot Size: 7,377 square feet
Style: Single Family Residential
Year Built: 1964
Year Renovated: 1965
County: Los Angeles County
APN: 8285018022
Home facts updated by county records on Aug 31, 2026
Around this home
Schools
Castle Rock Elementary School
Public K-5 • Assigned • 0.2mi
10/10
South Pointe Middle School
Public 6-8 • Assigned • 1.2mi
10/10
Diamond Bar High School
Public 9-12 • Assigned • 0.5mi
10/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
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