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For sale
  • $1,225,000

    18508 Madison Ave, Castro Valley, CA 94546

    4beds
    2,178sqft
    : 
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    Residential, Single Family Residence
    Built in 1952
    0.3 Acres Lot
    $1,208,800 Zestimate®
    $562/sqft
    $-- HOA

    What's special

    Expansive workshopOriginal hardwood floorsPrivacy and peaceful setting
    Tucked quietly along a peaceful Castro Valley street, this home is the kind of opportunity buyers are always hoping to find; a property that feels warm and welcoming from the moment you arrive, with room to enjoy today and endless potential for what it could become over time. Inside, original hardwood floors run throughout much of the home, while the comfortable 4-bedroom, 2-bath layout offers a sense of space that feels both functional and inviting. Every room reflects years of thoughtful care, creating a home that feels solid, lived in, and ready for its next chapter. At the heart of the home, an expanded dining room surrounded by walls of windows brings in natural light from every angle. It’s the kind of space that naturally becomes the gathering place of the home; morning coffee overlooking the yard, holiday dinners with family, or slow evenings spent lingering around the table with friends. Step outside and the possibilities continue. The backyard offers multiple spaces to relax, garden, entertain, or simply enjoy the privacy and peaceful setting. Perched above the home, a detached garage has been converted into a bonus space complete with its own deck overlooking the property below. Beneath it, an expansive workshop creates even more flexibility; ideal for storage, hobbies, a home gym, creative studio, or future ADU potential for buyers looking to maximize the property over time. This is the kind of home that sparks ideas the moment you walk through the door. Move right in and enjoy its charm exactly as it is, or slowly transform it into something truly special while building long-term value along the way.
    41 days
    |
    2,431
    |
    92
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    Zillow last checked:

    Listing updated:

    Listed by:

    Jessica Nance DRE #01960286 925-956-9552,

    Compass

    Source: CCAR,MLS#: 41135921MLS Logo

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      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 4
      • Bathrooms: 2
      • Full bathrooms: 2
      Rooms
      • Room types: 4 Bedrooms, 2 Baths, Main Entry, Workshop
      Kitchen
      • Features: Tile Counters, Dishwasher, Range/Oven Free Standing
      Heating
      • Zoned
      Cooling
      • No Air Conditioning
      Appliances
      • Included: Dishwasher, Free-Standing Range
      • Laundry: Laundry Room
      Features
      • Storage
      • Flooring: Hardwood, Linoleum, Carpet
      • Number of fireplaces: 1
      • Fireplace features: Family Room
      Interior area
      • Total structure area: 2,178
      • Total interior livable area: 2,178 sqft

      Property

      Parking
      • Total spaces: 2
      • Parking features: Carport, Detached
      • Garage spaces: 2
      • Has carport: Yes
      Features
      • Levels: One
      • Stories: 1
      • Pool features: None
      • Fencing: Fenced,Wood
      Lot
      • Size: 0.3 Acres
      • Features: Sloped Up, Back Yard, Front Yard
      Details
      • Parcel number: 84C88517
      • Special conditions: Standard
      • Other equipment: None

      Construction

      Type & style
      • Home type: SingleFamily
      • Architectural style: Traditional
      • Property subtype: Residential, Single Family Residence
      Materials
      • Stucco
      • Foundation: Slab
      • Roof: Shingle
      Condition
      • Existing
      • New construction: No
      • Year built: 1952

      Utilities & green energy

      • Electric: No Solar
      • Sewer: Public Sewer
      • Water: Public

      Community & HOA

      Community
      • Subdivision: Castro Valley
      HOA
      • Has HOA: No
      Location
      • Region: Castro Valley

      Financial & listing details

      • Price per square foot: $562/sqft
      • Tax assessed value: $137,056
      • Date on market: 5/26/2026

        Estimated market value

        $1,208,800

        $1.15M - $1.27M

        $4,936/mo

        Price history

        DateEventPrice
        5/26/2026Listed for sale$1,225,000$562/sqft
        Source: CCAR #41135921 Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2025-- $137,056 +2%
        2024$2,336 +2.6%$134,369 +2%
        2023$2,276 +2.8%$131,735 +2%
        2022$2,213 +3%$129,152 +2%
        2021$2,149 +2.5%$126,620 +1%
        2020$2,097 -1.2%$125,322 +2%
        2019$2,122 +6%$122,864 +2%
        2018$2,001 $120,455 +2%
        2017$2,001 +5.2%$118,095 +2%
        2016$1,903 +9.9%$115,779 +1.5%
        2015$1,730 $114,042 +2%
        2014$1,730 $111,808 +0.5%
        2013-- $111,303 +2%
        2012-- $109,121 +2%
        2011-- $106,982 +0.8%
        2010-- $106,183 -0.2%
        2009-- $106,436 +2%
        2008-- $104,349 +2%
        2007-- $102,304 +2%
        2006-- $100,298 +2%
        2005-- $98,331 +2%
        2004-- $96,404 +1.9%
        2003-- $94,638 +2%
        2002-- $92,782 +5.5%
        2001$1,104 $87,963

        Find assessor info on the county website

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        All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
        HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
        Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
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        Climate risks

        Neighborhood: 94546

        Getting around

        16 / 100
        Car-Dependent
        27 / 100
        Some Transit
        8 / 100
        Somewhat Bikeable

        Nearby schools

        GreatSchools rating

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