20048 Sapphire St, Castro Valley, CA, 94546
About This Home
Welcome to 20048 Sapphire St. in the heart of desirable Castro Valley! Offered for the first time ever, this charming single-story home is full of opportunity and ready for its next chapter. Featuring 3 bedrooms, 2 bathrooms, and a detached 2-car garage, this well-loved property offers great bones, a functional layout, and endless potential for buyers looking to add their own style and vision. Situated on a beautifully maintained lot with thoughtfully landscaped front and back yards, the home offers inviting curb appeal and outdoor spaces perfect for gardening, entertaining, or simply relaxing. Inside, you’ll find a cozy and comfortable floorplan with plenty of space to grow and the chance to create the home of your dreams. Whether you’re a first-time buyer, investor, or someone looking for a cosmetic fixer in an established neighborhood, this is a rare opportunity you won’t want to miss. Located in a highly sought-after Castro Valley neighborhood known for its strong community feel, convenient commuter access, and top-rated schools, this home is near Marshall Elementary, Creekside Middle School, and Castro Valley High School. Enjoy close proximity to parks, shopping, dining, BART, and major freeways while still enjoying the charm of a quiet residential street. Homes with this kind of potential, location, and pride of ownership rarely come available, bring your imagination and make 20048 Sapphire St. your own!
Getting Around
Somewhat Walkable
Some Transit
Somewhat BikeableSchools
Construction
Condition
- Property condition: Existing
- Year built: 1949
Materials
- Roof: Composition
- Construction materials: Stucco
Type & Style
- Home type: SingleFamily
- Architectural style: See Remarks
- Property subType: Residential,Single Family Residence
Interior
Appliances
- Appliances included: Dishwasher,Gas Range,Refrigerator,Dryer,Washer,Gas Water Heater
- Laundry features: Laundry Closet,In Kitchen
Bedrooms & Bathrooms
- Bedrooms: 3
- Bathrooms: 2
- Full bathrooms: 2
Features
- Flooring: Carpet,Other
- Number of fireplaces: 1
- Fireplace features: Brick,Living Room,Wood Burning
- Fireplace: Yes
Heating & Cooling
- Heating features: Forced Air,Fireplace(s)
- Cooling features: Central Air
Interior Area
- Total structure area: 1,596
- Total interior livable area: 1,596 sqft
Kitchen
- Features: 220 Volt Outlet,Dishwasher,Gas Range/Cooktop,Refrigerator
Property
Details
- Parcel number: 84C106480
- Special condition: Standard
Features
- Levels: One
- Stories: 1
- Pool features: None
- Patio & porch: Enclosed
Lot
- Lot size: 6,098 sqft
- Features: Back Yard,Front Yard,Landscaped,Landscape Back,Landscape Front
Parking
- Total spaces: 2
- Parking features: Detached,Off Street,Garage Door Opener
- Has garage: Yes
- Attached garage spaces: 2
- Covered spaces: 2
Climate Risk is Financial Risk
Every home has a financial story beyond the listing price. Below, you’ll see the climate risks that could affect this property — and in Bills & Affordability, how those risks may influence repairs, insurance, utilities, and long-term value.
Biggest Threats for This Home
- Earthquake
- Inland Flooding
- Heat Wave
How This Home’s Risks Compare
FEMA Declared Disasters in Alameda County and California
Understanding the Costs
Financial advisors generally recommend spending no more than 30% of your gross household income on housing costs. In practice, many households stretch to 35% or beyond — especially in high-cost markets.
Estimated Costs Today
| Monthly | Annual | |
|---|---|---|
| Mortgage | $4,545 | $54,540 |
| Home Insurance * | $139 | $1,668 |
| Property Taxes | $1,538 | $18,456 |
| Electricity | $398 | $4,786 |
| Total | $6,620 | $79,440 |
Income You'd Need if You Spent...
California FAIR Plan Programs
How Costs Could Change Over Time
Climate risk is quickly impacting all of the major home ownership costs. Adjust the growth rates and percentage of income spent on housing below to see how your housing costs could change over the next 10 years — and what income you'd need to keep up.
Comparing Against the Market
Price Per Sq Ft
vs Other Active Listings
Avg $/sqft
vs Homes Sold Last Month
Median $/sqft
Current Market Trends
Median Price Per Square Foot
The median price per square foot of homes sold in this area each month. Compare this to this listing's price per square foot to gauge whether the home is priced in line with recent sales.
Historicals for This Listing
Zestimate History ($/sqft)
Price History
| Date | Event | Price |
|---|---|---|
| 2026-05-11 | Listed for sale | $899,000 |
View on Zillow