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Discover a rare opportunity in a prime Castro Valley location! This well-maintained duplex sits on a massive lot, offering endless possibilities for expansion—build additional units, add ADUs, or create your dream outdoor retreat (buyer to verify with county). One unit is currently vacant and move-in ready, featuring fresh interior paint and brand-new carpet, ideal for an owner-occupant or to attract quality tenants. The other unit provides steady rental income, making this a smart investment with immediate upside. Inside, both units offer bright and functional living spaces with charming vintage touches. The expansive backyard is a blank canvas—perfect for gardening, outdoor entertaining, or future development. A detached shed adds storage or workshop flexibility. Conveniently located near top-rated Castro Valley schools, BART, shopping, and commuter routes, this property combines potential, location, and versatility. Don’t miss out on this unique investment or house-hacking opportunity in one of the East Bay’s most desirable communities!
Listing agent: Lily Do DRE #01728793 lily@lilydo.com, Listing office: Compass
MLS data updated 10/21/2026, 5:27:43 AM PT
Source: CRMLS, MLS #: 41116036
Belmont insights
Compare recorded home prices, same-type ZIP sales and mortgage rates.
Nov 26, 2025
Prices use the left axis; mortgage rates use the right. Hover, tap, or focus the chart and use the arrow keys. Red SOLD badges mark recorded sales.
This home · nearest recorded event
$1,075,000Closed sale · Nov 26, 2025ZIP 94546 · Nov 2025
No monthly averageAt least 3 eligible sales in this month are required.30-year fixed mortgage benchmark
No weekly rateNo published rate within 7 days of this date.ZIP averages use publicly displayable closed sales from our licensed MLS feed, matched to the same ZIP and exact property type. Months with fewer than 3 sales are omitted; the current month is incomplete. Lines connect available monthly observations across gaps and do not represent measured prices in missing months. These averages are not adjusted for size, condition, or location within the ZIP, and are not an appraisal. Feed coverage may not include every sale. All available shows the available home and ZIP history, with mortgage rates over the same dates.
Mortgage benchmark: Freddie Mac Primary Mortgage Market Survey®. © Freddie Mac. Weekly national 30-year fixed rates, not APRs or a loan quote. Actual terms vary. Methodology changed in November 2022. The chart does not establish that interest-rate changes caused a home’s price changes.
Lines connect recorded asking and sale prices. They are visual guides, not estimates of the home’s value between those dates.
No earlier records were returned by our current sources. This does not mean the home has never sold.
MLS records may be incomplete. Earlier asking prices are not sale prices.