Castro Valley, CA Housing Market 2026: What Homes Actually Sell For

If you invest in or around Castro Valley, the number that matters is what homes actually close for, not what sellers are asking. Here is what Castro Valley sale prices look like right now, built from the closings Resideline tracked over the last six months, as of September 2026.

The snapshot

• •Closings tracked, last 6 months: 254
• •Median sold price, last 6 months: $1,127,000
• •Median sold $/sqft, last 6 months: $673
• •Middle half of sales closed between: $868,000 and $1,425,000

What the numbers say

Resideline tracked 254 closed sales in Castro Valley over the last six months, with a median closing price of $1,127,000. 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 $868,000 and $1,425,000. 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 252 closings with usable living area, the middle half sold between $561 and $769 per square foot.

Figures last updated September 6, 2026 from closings Resideline tracked.

Median home price in Castro Valley, CA (September 2026)

The median home price in Castro Valley is $1,127,000, measured across the 254 closed sales Resideline tracked over the last six months. The middle half of those sales closed between $868,000 and $1,425,000.

Where Castro Valley sale prices land

Medians hide the shape of a market. The distribution above covers the closed sales Resideline tracked in Castro Valley over the last six months that carry a usable sale date, trimmed to the 5th through 95th percentile, with the middle half of sales closing between $868,000 and $1,425,000. Among the 262 California markets with a published band, Castro Valley's middle-half spread ($868,000 to $1,425,000) ranks 140th from the narrowest. 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 13 days, across 186 Castro Valley closings Resideline tracked in the last six months
• •Contract to closing: a median of 24 days, across 189 Castro Valley closings Resideline tracked in the last six months

The Castro Valley angle

Castro Valley generated 254 tracked closings over the last six months, with the median closed sale price at $1,127,000 and the middle half of sales between $868,000 and $1,425,000.More of the band sits above the median than below it, so a subject you judge stronger than a typical local sale has additional headroom before its price looks exceptional, while a weaker one meets the lower quartile sooner. Build the estimate from closed sales matched on what actually differentiates the property, and use $1,127,000 to keep the result honest.

From market read to offer price

A market read is the backdrop. 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. See the live accuracy dashboard for the receipts, or read how the Area Market Snapshot works.

Run any Castro Valley 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: Castro Valley, CA
Geography: Census-designated place, not an incorporated municipality, Census place 0611964
Data updated: September 2026
Analysis period: last six months
Tracked closings: 254
Median sold price: $1,127,000
Median sold $/sqft: $673 (252 qualifying)
https://resideline.com/blog/castro-valley-ca-housing-market

Writing about this market? Paste this into your post:

<a href="https://resideline.com/blog/castro-valley-ca-housing-market">
  <img src="https://resideline.com/images/embed/castro-valley-ca.png" alt="Castro Valley, CA home sale price distribution, last six months" width="1000" style="max-width:100%;height:auto">
</a>
<p>Source: <a href="https://resideline.com/blog/castro-valley-ca-housing-market">Resideline Market Watch</a></p>

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 Castro Valley over the last six months, and is refreshed when the data is. The closings we track across the Castro Valley Census-designated area are not limited to listing-service sales: they also include foreclosure deeds, estate and family transfers, and other off-market sales that portal medians exclude, which is why 11% of the 254 closings in this window never appeared on a listing service, and the median of MLS-listed sales alone was $1,130,000.