21504 Cold Spring Lane, Diamond Bar, CA 91765
Single-family home · 2 recorded sales since 2012
Sold September 2026
Listing Agent: ALLEN SHI (DRE #02045433) · Listing Office: Wetrust Realty · Contact: 626-202-8703 · Bought with: YAMING WU · First Team Real Estate · MLS #WS26113219 · Source: CRMLS
How this sale compares
21504 Cold Spring Lane sold for $1,380,000 in September 2026, 5.5% under its $1,460,000 list price, after 87 days on the market. It was first listed at $1,580,000. That works out to $509 per square foot on 2,712 square feet. Across 196 closed sales in 91765 over the last 12 months, the median sold price is $1,084,000 and the median is $553 per square foot, 8.6% above this sale's $509. 4-bedroom rentals in 91765 currently list at a median of $4,475 a month (16 listings).
| Quarter | Closed sales in 91765 | Median sold price |
|---|---|---|
| Q1 2026 | 16 | $1,050,000 |
| Q2 2026 | 87 | $1,128,000 |
| Q3 2026 | 89 | $1,057,000 |
| Q4 2026 | 4 | $798,000 |
Figures are MLS-reported closed sales (CRMLS); ZIP medians cover the last 12 months. Nalren does not estimate values. Recently sold in Diamond Bar · Homes for sale in 91765
Description
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.
Listing description from the September 2026 sale, as reported to CRMLS.
Sale history
Recent sales near 21504 Cold Spring Lane
21056 Blossom Way: Sold $1,262,000 · 4 bd · 3 ba · 2,115 sqft · Sep 2026 · 0.1 mi
The Sphere Realty | DRE #01795764
Buyer's agent: Lei Jin, PINNACLE REAL ESTATE GROUP | DRE #021855733106 Cherrydale: Sold $1,265,000 · 4 bd · 3 ba · 2,640 sqft · Sep 2026 · 0.2 mi
New Star Realty & Inv. | DRE #01406211
Buyer's agent: Anna Yang, New Star Realty & Inv. | DRE #0140621121642 High Bluff Road: Sold $1,680,000 · 5 bd · 3 ba · 3,006 sqft · Aug 2026 · 0.4 mi
Century 21 Masters | DRE #01078259
Buyer's agent: Yani Zhang, Wetrust Realty | DRE #022077333147 Fallow Field: Sold $1,110,000 · 4 bd · 2 ba · 2,108 sqft · Sep 2026 · 0.5 mi
NextHome Pacific Estates | DRE #01480741
Buyer's agent: Qiao Huang, Pinnacle Real Estate Group | DRE #0221144821245 Cold Spring: Sold $875,000 · 3 bd · 2 ba · 1,300 sqft · Jul 2026 · 0.5 mi
ehomes | DRE #01233369
Buyer's agent: JAVIER RAMIREZ, ehomes | DRE #012333692726 Castle Rock: Sold $930,000 · 3 bd · 2 ba · 1,300 sqft · Sep 2026 · 0.6 mi
Century 21 Jervis & Associates | DRE #00980855
Buyer's agent: Kevin Huynh, HNA Realty, Inc. | DRE #019104102606 Castle Rock Road: Sold $975,000 · 3 bd · 2 ba · 1,300 sqft · Aug 2026 · 0.8 mi
Synergy Real Estate | DRE #02042668
Buyer's agent: Jessica Li, Pinnacle Real Estate Group | DRE #020543572868 Oak Knoll Dr: Sold $3,930,000 · 6 bd · 6 ba · 6,423 sqft · Oct 2026 · 0.8 mi
ReMax Elite Realty | DRE #01022715
Buyer's agent: Danny Hao, JC Pacific Corp. | DRE #02095879
Closed sales reported in 91765, nearest first, last 12 months. All recent sales in Diamond Bar →