Welcome to 4247 Gem Avenue, a beautifully renovated single-story home in the heart of Castro Valley! Thoughtfully transformed with quality craftsmanship, modern finishes, and extensive upgrades completed with permits. The stunning kitchen features stainless steel appliances, custom cabinetry, a spacious island, and a pot filler. Beautifully designed bathrooms offer walk-in showers, rainfall showerheads, and modern fixtures. Major improvements include new electrical wiring with a 200-amp panel, updated plumbing and drainage, a new HVAC furnace and ductwork, and a new composition roof. Additional highlights include waterproof plank flooring, designer lighting, an EV-ready garage, and refreshed landscaping. Conveniently located near Castro Valley’s highly regarded schools, shopping, dining, and commuter routes. Move-in ready with the peace of mind of permitted improvements!
For sale
$999,000
4247 Gem Ave, Castro Valley, CA 94546
3beds
1,737sqft
Residential, Single Family Residence
Built in 1947
5,775 Square Feet Lot
$1,074,500 Zestimate®
$575/sqft
$-- HOA
What's special
Modern fixturesEv-ready garageStunning kitchenCustom cabinetrySpacious islandWaterproof plank flooringDesigner lighting
- 14 days
- 3,426
- 358
Zillow last checked:
Listing updated:
Listed by:
Kristen Bleth DRE #02058725 510-408-8161,
Evolve Real Estate,
Sunday Nguyen DRE #02206061 510-999-6663,
Exp Realty Of California
Source: Bay East AOR,MLS#: 41151756
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 3
- Bathrooms: 3
- Full bathrooms: 3
Rooms
- Room types: 3 Bedrooms, 3 Baths, Main Entry, Dining Room, Dining Area
Kitchen
- Features: Breakfast Bar, Stone Counters, Dishwasher, Disposal, Gas Range/Cooktop, Refrigerator, Updated Kitchen, Other
Heating
- Central
Cooling
- None
Appliances
- Included: Dishwasher, Gas Range, Refrigerator, Tankless Water Heater
- Laundry: Hookups Only, Laundry Room, Common Area
Features
- Breakfast Bar, Updated Kitchen
- Flooring: Hardwood
- Number of fireplaces: 3
- Fireplace features: Living Room
Interior area
- Total structure area: 1,737
- Total interior livable area: 1,737 sqft
Video & virtual tour
Property
Parking
- Total spaces: 1
- Parking features: Attached
- Garage spaces: 1
Features
- Levels: One
- Stories: 1
- Patio & porch: Deck
- Exterior features: Garden, Garden/Play, See Remarks
- Pool features: None
- Fencing: Fenced
Lot
- Size: 5,775 Square Feet
- Features: Level, See Remarks, Back Yard, Front Yard
Details
- Parcel number: 84C66953
- Special conditions: Standard
- Other equipment: See Remarks
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Ranch
- Property subtype: Residential, Single Family Residence
Materials
- Stucco
- Roof: Composition
Condition
- Existing
- New construction: No
- Year built: 1947
Utilities & green energy
- Electric: No Solar
- Sewer: Public Sewer
- Water: Public
Community & HOA
Community
- Security: Smoke Detector(s)
- Subdivision: Castro Valley
HOA
- Has HOA: No
Location
- Region: Castro Valley
Financial & listing details
- Price per square foot: $575/sqft
- Tax assessed value: $755,000
- Price range: $999K - $999K
- Date on market: 10/20/2026
- Listing agreement: Excl Right
- Listing terms: Cash,Conventional,Other
Estimated market value
$1,074,500
$1.02M - $1.14M
$4,075/mo
Price history
| Date | Event | Price |
|---|---|---|
| 10/20/2026 | Listed for sale | $999,000+32.3%$575/sqft |
Source:  Bay East AOR #41151756 Report a problem | ||
| 7/29/2025 | Sold | $755,000+16.3%$435/sqft |
Source: Bay East AOR #41103454 Report a problem | ||
| 7/11/2025 | Pending sale | $649,000$374/sqft |
Source: Bay East AOR #41103454 Report a problem | ||
| 7/4/2025 | Listed for sale | $649,000$374/sqft |
Source: Bay East AOR #41103454 Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2026 | -- | $755,000 +308.3% |
| 2025 | $2,969 +2.8% | $184,908 +2% |
| 2024 | $2,889 +2.4% | $181,283 +2% |
| 2023 | $2,822 +2.6% | $177,729 +2% |
| 2022 | $2,750 +2.9% | $174,245 +2% |
| 2021 | $2,673 +2.5% | $170,829 +1% |
| 2020 | $2,609 -1.3% | $169,078 +2% |
| 2019 | $2,644 +5.9% | $165,764 +2% |
| 2018 | $2,496 | $162,514 +2% |
| 2017 | $2,496 +5.2% | $159,327 +2% |
| 2016 | $2,373 +9.5% | $156,204 +1.5% |
| 2015 | $2,168 | $153,858 +2% |
| 2014 | $2,168 | $150,844 +0.5% |
| 2013 | -- | $150,163 +2% |
| 2012 | -- | $147,219 +2% |
| 2011 | -- | $144,332 +0.8% |
| 2010 | -- | $143,254 -0.2% |
| 2009 | -- | $143,594 +2% |
| 2008 | -- | $140,779 +2% |
| 2007 | -- | $138,020 +2% |
| 2006 | -- | $135,315 +2% |
| 2005 | -- | $132,661 +2% |
| 2004 | -- | $130,062 +1.9% |
| 2003 | -- | $127,678 +2% |
| 2002 | -- | $125,174 +2% |
| 2001 | $1,466 | $122,721 |
Find assessor info on the county website
Monthly payment
Est. payment
Payment breakdown
Explore the cost of this home by adjusting the details. Changes won't be saved.Climate risks
Neighborhood: 94546
Similar homes
- $1,249,0003 bd2 ba1.7k sqft19431 Garrison Ave, Castro Valley, CA 94546For Sale
MLS ID #41151610, Leslie Peterson. Bay East AOR - $1,080,0005 bd4 ba1.9k sqft3270 Keith Ave, Castro Valley, CA 94546For Sale
MLS ID #41149286, Shan Susan Gao. Bay East AOR - $1,188,8883 bd2 ba1.4k sqft3161 Brent Ct, Castro Valley, CA 94546For Sale
MLS ID #426171885, Ching Fai Cheung DRE #01960245, eXp Realty of California, Inc. SFAR - $998,0003 bd2 ba1.2k sqft31871 Kennet St, Hayward, CA 94544For Sale
MLS ID #41148936, Erika Coll Cordoba. bridgeMLS/CCAR/Bay East AOR
