Market report
Diamond Bar, September 2026
The median Diamond Bar home sold for $1,110,000 in September, against $910,000 in September 2025. In September 2026, 29 homes sold in Diamond Bar at a median $1,110,000 ($517 a square foot), after a median 49 days on the market. In August it was 23 sales at a median $1,088,000.
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The month in numbers
Every home that closed in Diamond Bar in September 2026, next to the month before and the same month last year.
| September 2026 | August 2026 | September 2025 | |
|---|---|---|---|
| Homes sold | 29 | 23 | 49 |
| Median sale price | $1,110,000 | $1,088,000 | $910,000 |
| Median price per sq ft | $517 | $531 | $532 |
| Median days on market | 49 | 39 | 26 |
| Median sale vs asking | $31,000 under | $15,000 under | $5,000 under |
| Sold over / at / under asking | 4 / 3 / 22 | 4 / 3 / 16 | 17 / 5 / 27 |
Where prices moved
A neighbourhood view of how values trended across Diamond Bar, the last twelve months against the twelve before.
Price my file →Oct 2025–Oct 2026 against Oct 2024–Oct 2025, as of October 19, 2026.
What sold
The monthly file is a written read, not a closing list — so these are the desk's own latest Diamond Bar rows: the status each address moved to, and the brokerage that carried it.
The weekly desk note →- 23308 Quail SummitKC Realty GroupSold▇▇▇▇ ▇▇▇▇ VaultWatch
- 1318 S Diamond Bar Boulevard CRE/MAX 2000 REALTYSold▇▇▇▇ ▇▇▇▇ VaultWatch
- 800 Grand Avenue D1Pinnacle Real Estate GroupPending▇▇▇▇ ▇▇▇▇ VaultWatch
- 2169 Rocky ViewCC Royal RealtySold▇▇▇▇ ▇▇▇▇ VaultWatch
- 203 TanforanMarketing SpecialistsPending▇▇▇▇ ▇▇▇▇ VaultWatch
- 780 Leyland DriveWeTrust RealtySold▇▇▇▇ ▇▇▇▇ VaultWatch
- 2360 S Diamond Bar JDoubletree RealtorsActive Under Contract▇▇▇▇ ▇▇▇▇ VaultWatch
- 22915 Colombard Lane 2JOHNHART CORPActive Under Contract▇▇▇▇ ▇▇▇▇ VaultWatch
Bought by: I follow these closings myself — some of these buyers I know, a few were my clients. The names are for Vault members; everything else on the row is open.
Rows as of October 19.
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