




18508 Mountain Ln, Castro Valley, CA, 94552
About This Home
This exquisitely updated five-bedroom Eichler seamlessly blends iconic mid-century architecture with refined modern design, sitting on a flat .31-acre lot. Originally designed by renowned architectural firm Jones & Emmons for Joseph Eichler, the home has been thoughtfully reimagined while preserving the clean lines, natural materials, and indoor-outdoor living that define its architectural legacy. A serene open-air atrium welcomes you into the heart of the home. The open-concept living, dining, and kitchen areas flow effortlessly together, with walls of glass and direct access to the surrounding outdoor spaces. Vaulted ceilings and beams enhance the sense of volume, while an exposed wood feature wall adds warmth and character. At the center of the home, the sleek designer kitchen features a quartz waterfall island, Carrara marble backsplash, premium stainless-steel appliances, an induction cooktop, a wine refrigerator, and generous pantry storage. The private primary wing is a tranquil retreat with direct backyard access and a spa-inspired en suite bathroom featuring a dual shower head and a double vanity. An adjacent fifth bedroom/office opens to the atrium, providing a flexible space. On the opposite side of the home, three generously sized bedrooms offer privacy and comfortable separation of space. The thoughtfully landscaped yard features redwood trees, well-landscaped grounds, and turf that create a peaceful setting. The expansive rear patio provides abundant space for outdoor dining, entertaining, and relaxation, equally suited for everyday living and special occasions. Located in Castro Valley's sought-after Greenridge neighborhood, the home offers a tranquil residential setting with convenient access to parks and trails at Greenridge Park, Cull Canyon Park, and Lake Chabot. Castro Valley BART and major commute corridors are within easy reach, providing excellent connectivity throughout the Bay Area.
Getting Around
Schools
Construction
Condition
- Property condition: Updated/Remodeled
- Year built: 1963
Type & Style
- Home type: SingleFamily
- Architectural style: Mid-Century
- Property subType: Single Family Residence
Interior
Bedroom1
- Area: 0
Bedroom2
- Area: 0
Bedroom3
- Area: 0
Bedroom4
- Area: 0
Bedrooms & Bathrooms
- Bedrooms: 5
- Bathrooms: 2
- Full bathrooms: 2
Dining Room
- Area: 0
Family Room
- Area: 0
Features
- Cathedral Ceiling(s),Beamed Ceilings
Heating
- Heating features: Radiant
Interior Area
- Total structure area: 2,050
- Total interior livable area: 2,050 sqft
Kitchen
- Features: Kitchen Island, Quartz Counter
- Area: 0
Living Room
- Features: Cathedral/Vaulted, Beamed Ceilings
- Area: 0
Master Bathroom
- Features: Double Vanity, Radiant Heat
Master Bedroom
- Area: 0
Property
Details
- Parcel number: 0851606040
- Special condition: Standard
Lot
- Lot size: 0.31 Acres
Parking
- Total spaces: 4
- Parking features: Attached,Covered,Side By Side,On Site (Single Family Only)
- Has garage: Yes
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
- Landslide
- Wildfire
- 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 | $8,570 | $102,840 |
| Home Insurance * | $294 | $3,528 |
| Property Taxes | $1,725 | $20,700 |
| Electricity | $439 | $5,275 |
| Total | $11,028 | $132,336 |
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)
No zestimate history available
Price History
| Date | Event | Price |
|---|---|---|
| 2026-08-05 | Pending sale | $1,695,000 |
| 2026-07-23 | Listed for sale | $1,695,000 |
| 2018-05-04 | Sold | $1,500,000 |
| 2018-04-18 | Pending sale | $1,394,900 |
| 2018-04-10 | Listed for sale | $1,394,900 |
| 2017-11-08 | Sold | $865,000 |
| 2017-08-21 | Sold | $691,000 |
