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For sale
    • $999,950

    4231 Somerset Ave, Castro Valley, CA 94546

    3beds
    1,285sqft
    : 
    $6,865/mo
    Get pre-qualified
    Residential, Single Family Residence
    Built in 1949
    5,292 Square Feet Lot
    $-- Zestimate®
    $778/sqft
    $-- HOA

    What's special

    Custom tray ceilingPatio deckCorian countertopsExtensive built-in cabinetryDetached updated studio aduGorgeous hardwood floorsUpdated kitchen
    Charming, beautifully remodeled 3-bedroom, 1-bath home offering 1,035 square feet of comfortable living space, plus a detached 250-square-foot cottage (ADU). The rental income from the cottage provides an excellent opportunity to offset your mortgage, making it easier to own more home in this desirable, quiet court location. Tasteful updates are found throughout the property. Gorgeous hardwood floors flow through most of the home, complemented by tile flooring in the kitchen, bathroom, and laundry room, with carpet in select areas. The updated kitchen features Corian countertops, attractive wood cabinetry, a 4-burner gas range, built-in microwave, and abundant cabinet space. A spacious laundry room offers even more storage with extensive built-in cabinetry. The inviting living room showcases a custom tray ceiling, elegant crown molding, and energy-efficient LED lighting, creating a warm and welcoming atmosphere. Step outside to a patio deck overlooking the private, fenced backyard with lush lawn—perfect for relaxing or entertaining. A matching storage shed provides additional space for tools, gardening equipment, or seasonal items. A standout feature of this property is the detached, updated studio ADU, offering exceptional flexibility and income potential. Currently rented for $1,750 per month plus utilities, the cottage is separately fenced for added privacy and is ideal as a rental, guest house, private home office, or space for extended family. Move-in ready and thoughtfully updated, this exceptional property combines comfort, style, and outstanding investment potential. Don't miss this rare opportunity!
    58 days
    |
    1,164
    |
    38
    |

    Zillow last checked:

    Listing updated:

    Listed by:

    Tim Fiebig DRE #00657474 tim@timfiebig.com,

    Exp Realty Of California, Inc,

    Renhui Yang DRE #02069549 510-213-0821,

    Exp Realty Of California, Inc

    Source: Bay East AOR,MLS#: 41139746MLS Logo

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 3
      • Bathrooms: 1
      • Full bathrooms: 1
      Rooms
      • Room types: 3 Bedrooms, 1 Bath, Main Entry, Converted Garage
      Bathroom
      • Features: Shower Over Tub, Dual Flush Toilet
      Kitchen
      • Features: Counter - Solid Surface, Dishwasher, Eat-in Kitchen, Disposal, Gas Range/Cooktop, Ice Maker Hookup, Microwave, Range/Oven Free Standing, Refrigerator, Updated Kitchen
      Heating
      • Forced Air
      Cooling
      • Central Air
      Appliances
      • Included: Dishwasher, Gas Range, Plumbed For Ice Maker, Microwave, Free-Standing Range, Refrigerator, Dryer, Washer
      • Laundry: Gas Dryer Hookup, Laundry Room
      Features
      • Counter - Solid Surface, Updated Kitchen
      • Flooring: Hardwood, Tile, Carpet
      • Basement: Crawl Space
      • Has fireplace: No
      • Fireplace features: None
      Interior area
      • Total structure area: 1,285
      • Total interior livable area: 1,285 sqft
      Video & virtual tour

      Property

      Parking
      • Parking features: Carport, Converted Garage
      • Has carport: Yes
      Accessibility
      • Accessibility features: None
      Features
      • Levels: One
      • Stories: 1
      • Patio & porch: Deck
      • Pool features: None
      • Fencing: Fenced
      Lot
      • Size: 5,292 Square Feet
      • Features: 2 Houses / 1 Lot, Premium Lot, Front Yard, Landscaped, Back Yard
      Details
      • Parcel number: 84C75732
      • Special conditions: Standard

      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: 1949

      Utilities & green energy

      • Electric: No Solar
      • Sewer: Public Sewer
      • Water: Public
      Green energy
      • Energy efficient items: None

      Community & HOA

      Community
      • Security: Carbon Monoxide Detector(s), Double Strapped Water Heater, Smoke Detector(s)
      • Subdivision: Castro Valley
      HOA
      • Has HOA: No
      Location
      • Region: Castro Valley

      Financial & listing details

      • Price per square foot: $778/sqft
      • Tax assessed value: $905,000
      • Annual tax amount: $11,466
      • Price range: $1M - $1M
      • Date on market: 6/26/2026
      • Listing agreement: Excl Right
      • Listing terms: Cash,Conventional

        Estimated market value

        Not available

        Estimated sales range

        Not available

        Not available

        Price history

        DateEventPrice
        6/26/2026Listed for sale$999,950+0.2%$778/sqft
        Source: Bay East AOR #41139746 Report a problem
        11/24/2021Sold$998,000+14.1%$777/sqft
        Source: Bay East AOR #40973960 Report a problem
        11/11/2021Pending sale$875,000+59.1%$681/sqft
        Source: bridgeMLS/CCAR/Bay East AOR #40973960 Report a problem
        5/5/2005Sold$550,000+37.5%$428/sqft
        Source: Bay East AOR #40071567 Report a problem
        8/15/2003Sold$400,000+57.5%$311/sqft
        Source: Public Record Report a problem
        7/29/1999Sold$254,000$198/sqft
        Source: Public Record Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2025$11,466 +2%$905,000 +1.7%
        2024$11,246 -12.1%$890,000 -12.6%
        2023$12,796 +1.9%$1,017,960 +2%
        2022$12,559 +37.7%$998,000 +40.9%
        2021$9,123 +2.3%$708,212 +1%
        2020$8,915 -1.8%$700,952 +2%
        2019$9,081 +22.3%$687,213 +10.5%
        2018$7,424 $622,000 +10.5%
        2017$7,424 +7.9%$563,000 +5%
        2016$6,880 +35.7%$536,000 +22.1%
        2015$5,070 $439,000 +8.9%
        2014$5,070 $403,000 +13.5%
        2013-- $355,000
        2012-- $355,000 -4.1%
        2011-- $370,000 -14.9%
        2010-- $435,000 +1.7%
        2009-- $427,600 -26.7%
        2008-- $583,660 +2%
        2007-- $572,220 +2%
        2006-- $561,000 +37.5%
        2005-- $408,000 +2%
        2004-- $400,000 +48.4%
        2003-- $269,547 +2%
        2002-- $264,261 +2%
        2001$2,888 $259,080
        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.
        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.
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        Climate risks

        Neighborhood: 94546

        Getting around

        40 / 100
        Car-Dependent
        27 / 100
        Some Transit
        45 / 100
        Somewhat Bikeable

        Nearby schools

        GreatSchools rating

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