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Sold for $2,100,000
  • $2,100,000

    18508 Mountain Ln, Castro Valley, CA 94552

    5beds
    2,050sqft
    Single Family Residence
    Built in 1963
    0.31 Acres Lot
    $2,099,000 Zestimate®
    $1,024/sqft
    $4,467 Estimated rent

    Home value

    $2,099,000

    $1.91M - $2.31M

    $4,467/mo

    Zestimate® history
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    What's special

    Quartz waterfall islandCarrara marble backsplashExposed wood feature wallPremium stainless-steel appliancesSleek designer kitchenInduction cooktopWine refrigerator
    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.

    Zillow last checked:

    Listing updated:

    Listed by:

    Maddy Mazzola DRE #02109929 510-846-5168,

    Compass 415-660-9955,

    Martin A. Leon DRE #01976417 415-652-4532,

    Harper Real Estate

    Bought with:

    Kirsty Hepburn, DRE #02141613

    Compass

    Crystal Florida, DRE #01926266

    Compass

    Source: SFAR,MLS#: 426148346MLS LogoOriginating MLS: San Francisco Association of REALTORS

    Facts & features

    Interior

    Bedrooms & bathrooms
    • Bedrooms: 5
    • Bathrooms: 2
    • Full bathrooms: 2
    Rooms
    • Room types: Atrium
    Primary bedroom
    • Area: 0
    • Dimensions: 0 x 0
    Bedroom 1
    • Area: 0
    • Dimensions: 0 x 0
    Bedroom 2
    • Area: 0
    • Dimensions: 0 x 0
    Bedroom 3
    • Area: 0
    • Dimensions: 0 x 0
    Bedroom 4
    • Area: 0
    • Dimensions: 0 x 0
    Primary bathroom
    • Features: Double Vanity, Radiant Heat
    Dining room
    • Area: 0
    • Dimensions: 0 x 0
    Family room
    • Area: 0
    • Dimensions: 0 x 0
    Kitchen
    • Features: Kitchen Island, Quartz Counter
    • Area: 0
    • Dimensions: 0 x 0
    Living room
    • Features: Cathedral/Vaulted, Beamed Ceilings
    • Area: 0
    • Dimensions: 0 x 0
    Heating
    • Radiant
    Features
    • Cathedral Ceiling(s), Beamed Ceilings
    • Has fireplace: No
    Interior area
    • Total structure area: 2,050
    • Total interior livable area: 2,050 sqft

    Property

    Parking
    • Total spaces: 4
    • Parking features: Attached, Covered, Side By Side, On Site (Single Family Only)
    • Has attached garage: Yes
    Lot
    • Size: 0.31 Acres
    Details
    • Parcel number: 0851606040
    • Special conditions: Standard

    Construction

    Type & style
    • Home type: SingleFamily
    • Architectural style: Mid-Century
    • Property subtype: Single Family Residence
    Condition
    • Updated/Remodeled
    • New construction: No
    • Year built: 1963

    Utilities & green energy

    • Sewer: Public Sewer

    Community & HOA

    HOA
    • Has HOA: No
    Location
    • Region: Castro Valley
    • Elevation: 0

    Financial & listing details

    • Price per square foot: $1,024/sqft
    • Tax assessed value: $1,740,840
    • Date on market: 7/23/2026
    • Cumulative days on market: 12 days
    • Total actual rent: 0

    Price history

    DateEventPrice
    8/19/2026Sold$2,100,000+23.9%$1,024/sqft
    Source: SFAR #426148346 Report a problem
    8/5/2026Pending sale$1,695,000$827/sqft
    Source: SFAR #426148346 Report a problem
    7/23/2026Listed for sale$1,695,000+13%$827/sqft
    Source: SFAR #426148346 Report a problem
    5/4/2018Sold$1,500,000+7.5%$732/sqft
    Source: Bay East AOR #40816851 Report a problem
    4/18/2018Pending sale$1,394,900$680/sqft
    Source: J. Rockcliff, REALTORS� #40816851 Report a problem
    4/10/2018Listed for sale$1,394,900+61.3%$680/sqft
    Source: J. Rockcliff, REALTORS� #40816851 Report a problem
    11/8/2017Sold$865,000+25.2%$422/sqft
    Source: Public Record Report a problem
    8/21/2017Sold$691,000$337/sqft
    Source: Public Record Report a problem

    Public tax history

    YearProperty taxesTax assessment
    2026-- $1,740,840 +2%
    2025$20,926 +2.2%$1,706,714 +2%
    2024$20,481 +1.5%$1,673,250 +2%
    2023$20,186 +1.8%$1,640,444 +2%
    2022$19,827 +2.6%$1,608,284 +2%
    2021$19,330 +2.3%$1,576,754 +1%
    2020$18,894 -1.9%$1,560,600 +2%
    2019$19,261 +357.1%$1,530,000 +76.9%
    2018$4,214 $865,000 +186%
    2017$4,214 +5.1%$302,477 +2%
    2016$4,008 +127.7%$296,548 +163.7%
    2015$1,760 +2.8%$112,444 +2%
    2014$1,713 $110,242 +0.5%
    2013-- $109,744 +2%
    2012-- $107,593 +2%
    2011-- $105,484 +0.8%
    2010-- $104,695 -0.2%
    2009-- $104,944 +2%
    2008-- $102,886 +2%
    2007-- $100,869 +2%
    2006-- $98,891 +2%
    2005-- $96,952 +2%
    2004-- $95,053 +1.9%
    2003-- $93,311 +2%
    2002-- $91,481 +2%
    2001$1,122 $89,687
    Find assessor info on the county website

    Neighborhood: 94552

    Nearby schools

    GreatSchools rating
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    Estimated market value
    $2,099,000
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    Find out how much your home could sell for in as little as 3 minutes with a no-obligation cash offer.
    Estimated market value
    $2,099,000