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.
For sale
$1,225,000
18508 Madison Ave, Castro Valley, CA 94546
4beds
2,178sqft
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
- 41 days |
- 2,431 |
- 92 |
Zillow last checked:
Listing updated:
Listed by:
Jessica Nance DRE #01960286 925-956-9552,
Compass
Source: CCAR,MLS#: 41135921
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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
Video & virtual tour
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
| Date | Event | Price |
|---|---|---|
| 5/26/2026 | Listed for sale | $1,225,000$562/sqft |
Source: | ||
Public tax history
| Year | Property taxes | Tax 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 | $87,963 |
Find assessor info on the county website
Monthly payment
Est. payment$--/mo
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.
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
Nearby schools
GreatSchools rating
- 9/10Vannoy Elementary SchoolGrades: K-5Distance: 0.4 mi
- 7/10Canyon Middle SchoolGrades: 6-8Distance: 0.8 mi
- 9/10Castro Valley High SchoolGrades: 9-12Distance: 0.9 mi
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Local buyer's agents are ready to help
- California
- Alameda County
- Castro Valley
- 94546
- 18508 Madison Ave




