Diamond Bar, CA Housing Market 2026: What Homes Actually Sell For

Diamond Bar produces a steady stream of closings but little consensus: sales over the last six months span a range wide enough that the median is a midpoint between different markets, not a going rate. The distribution below matters more than the headline.

The snapshot

• •Closings tracked, last 6 months: 274
• •Median sold price, last 6 months: $1,053,500
• •Median sold $/sqft, last 6 months: $554
• •Middle half of sales closed between: $651,000 and $1,335,000

What the numbers say

Resideline tracked 274 closed sales in Diamond Bar over the last six months, with a median closing price of $1,053,500. That median is the midpoint of what buyers actually paid, not what sellers hoped to get, which is why it moves differently from the asking prices you see on listing sites. The middle half of those sales closed between $651,000 and $1,335,000. That spread matters more than the headline median: where a specific property sits inside it decides whether the citywide number helps you or misleads you. These are the closings Resideline tracks and may differ from complete county or municipal records. Across the 274 closings with usable living area, the middle half sold between $493 and $618 per square foot.

Figures last updated August 22, 2026 from closings Resideline tracked.

Median home price in Diamond Bar, CA (August 2026)

The median home price in Diamond Bar is $1,053,500, measured across the 274 closed sales Resideline tracked over the last six months. The middle half of those sales closed between $651,000 and $1,335,000.

Where Diamond Bar sale prices land

Medians hide the shape of a market. The distribution above covers the closed sales Resideline tracked in Diamond Bar over the last six months, trimmed to the 5th through 95th percentile, with the middle half of sales closing between $651,000 and $1,335,000. Where your target property sits inside that spread matters more than the citywide median.

How long a sale takes here

• •Listed to under contract: a median of 29 days, across 149 Diamond Bar closings Resideline tracked in the last six months
• •Contract to closing: a median of 17 days, across 138 Diamond Bar closings Resideline tracked in the last six months

The Diamond Bar angle

Diamond Bar's band is ordinary in width relative to the markets we track, and the sample behind it is workable rather than deep. That points to a comp-led estimate with the citywide figures kept in a supporting role. Tighten the radius while the set survives; extend the date window before you loosen anything that makes a sale genuinely comparable. Then bring in $1,053,500 to check that the result sits in a plausible region of the market. The band leans low. More ground separates $651,000 from $1,053,500 than separates $1,053,500 from $1,335,000, so the lower side of this market is the more dispersed one. A comp set below the midpoint spans a wider price range than an equal set above it, which means low-side estimates should rest on closer matches rather than on longer lists.

From market read to offer price

A spread this wide means the citywide number cannot price a specific address; the step that matters is the property-level read. The decision still comes down to one property and one number: what it is actually worth and what you should pay. Every Resideline report opens with this same market snapshot for the subject's exact ZIP code, then gives you the property's value, the sold comps behind it, and a market rent estimate. Pricing a specific deal? The free ARV calculator and rental property calculator run the numbers in about a minute.

And we show our work. Every estimate is frozen while the home is for sale and graded against the real closing price after it sells. As of August 2026, the public scoreboard showed 3.26% median error across 12,508+ graded closings. See the live accuracy dashboard for the receipts, or read how the Area Market Snapshot works.

Run any Diamond Bar address through Resideline and you will see the local market and the property's value together, in one report.

Cite this

Using these numbers? Please cite the source and the sample size:

Source: Resideline Market Watch
Market: Diamond Bar, CA
Data updated: August 2026
Analysis period: last six months
Tracked closings: 274
Median sold price: $1,053,500
Median sold $/sqft: $554 (274 qualifying)
https://resideline.com/blog/diamond-bar-ca-housing-market

The local market statistics in this report are calculated from closed sales tracked by Resideline. Transaction coverage may differ from complete county or municipal records.

Every local market figure on this page is computed from closed sales Resideline tracked in Diamond Bar over the last six months, and is refreshed when the data is.