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Nestled in the heart of Castro Valley, 4448 Gem shines as the crown jewel of the neighborhood! With approximately 1964 square feet, the main house features 4 bedrooms & 2 full bathrooms. The upper level hosts 3 of the bedrooms, 1 bathroom, living room, kitchen, & dining area. The lower level has many possibilities & can function as a 4th bedroom, in-law unit, or rental unit as it has a bedroom area, living space, full bathroom, second kitchen, walk-in closet, & separate entrance. There is ALSO an attached 443 sq ft studio unit that is fully separated from the main house and it offers a bedroom area, kitchen & full bath that can be used as a rental unit, or for one's own uses such as an art studio or home office! Updates include luxury vinyl floors, fresh paint, renovated kitchen & baths, new lighting, dual pane windows, fences, & driveway. The 17,000 sq ft lot boasts park-like grounds & borders tranquil crow creek. It offers a shed, planter boxes, & a large deck. A new driveway provides side access & boat/RV parking. Prime CV location with one block to Creekside Middle School, & walking distance to Earl Warren Park! Enjoy the shops, services, & restaurants of Castro Village and the new Castro Valley Marketplace. Close to CV Bart & major highways! 3d tour: www.4448Gem.com/?mls
Listing agent: Julienne Courtney DRE #01376948 JulienneMCourtney@gmail.com, Listing office: Berkshire Hathaway Home Services
MLS data updated 10/19/2026, 8:27:28 AM PT
Source: CRMLS, MLS #: 41057504
Belmont insights
Compare recorded home prices, same-type ZIP sales and mortgage rates.
May 23, 2024
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
$1,300,000Closed sale · May 23, 2024ZIP 94546 · May 2024
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.