21504 Cold Spring Lane

Off Market

21504 Cold Spring Lane

Diamond Bar CA 91765

2712 sq. ft.

14248 sq. ft.

Single-Family

Last sold for $1,380,000

ALLEN SHI, last sold this property on 28 September 2026 after 120 days on market.

Overview

PAID OFF Solar System with 32 Panasonic Panels. Two Tesla EV charging stations, 2025 AO Smith electric water heater, a whole-house water softener system, newer roof, and newer A/C. Enjoy beautiful mountain views by day and sparkling city lights by night from this lovely home nestled in the desirable hills of Diamond Bar, complete with a private pool perfect for relaxing or entertaining. The bright and airy layout features soaring high ceilings in the living room, abundant natural light, a desirable downstairs bedroom, and a spacious 3-car garage. Located within the award-winning Walnut Valley Unified School District with top-rated 10/10 schools, and just minutes from Diamond Hills Plaza featuring H Mart, popular dining, shopping, and everyday conveniences. NO HOA.

Features

4 bedrooms

3 bathrooms

3 carspaces

3 garage spaces

2712 sq. ft. floor area

14248 sq. ft. lot size

Single-Family

Estimated Value

Based on this property and similar 4 bedroom single-family properties sold in Diamond Bar over the last 12 months, the estimated median property value of 21504 Cold Spring Lane is $1.24m.

Median value

$1.24m

Estimated value range

$755k - $2.55m

Median days on market

Estimated value trend

increase over the last 12 months

Average days on market is based on recent, comparable sales in Diamond Bar. It is only an indication of the time a property is actively listed and should not be relied upon as an accurate representation of how soon a property will be sold.

Property history for 21504 Cold Spring Lane

2026

Sold

$1,380,000

28 Sep 2026 by ALLEN SHI, of SKY VISION INVESTMENT CORP.

Happy sellers in Diamond Bar

85%

85% of sellers in Diamond Bar reported that their sale price either exceeded or met their price expectations.

Diamond Bar stands out for consistently delivering exceptional satisfaction and strong market results for homeowners.

This is based on voluntary sentiment collected from 4 reviews in Diamond Bar over the last 12 months.

Local market activity for 4 bedroom single-family properties in Diamond Bar

In the last 12 months, 128 four-bedroom single-family properties similar to 21504 Cold Spring Lane, have been sold.

This represents a 9% increase in four-bedroom single-family properties sales when compared to the previous 12 months.

Sold

For Sale

Interested in selling?

People are reaching out to these agents in Diamond Bar for a market analysis.

Mauricio Rodriguez

(1 review)

Get a market analysis

Lan "Gloria" Xiao

at REMAX Elite Realty | Alhambra

(110 reviews)

Get a market analysis

Stanley Escobar

at REMAX Dynasty | Whittier

(34 reviews)

Get a market analysis

George Najem

at Dreamworks Real Estate

(4 reviews)

Get a market analysis

Nearby agents

Compare and contact these top performing agents who’ve delivered exception customer service for their clients in Diamond Bar

Mauricio Rodriguez

Mauricio Rodriguez is a recommended agent for Diamond Bar. They have 1 local sale and collected 1 local review across the last 12 months.

5 (1 review)
1 Review in Diamond Bar
1 Sale in Diamond Bar

View profile

Lan "Gloria" Xiao

Lan "Gloria" Xiao is an award winning recommended agent for Diamond Bar. They have 1 local sale and collected 1 local review across the last 12 months.