18508 Madison Ave

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.

Current Status

Active - Coming Soon

Original Price

$1,225,000

List Price

$1,225,000

On Market Date

May 25, 2026

Property Type

Detached

D/N/S

Castro Valley

Zip Code

94546

MLS ID

41135921

APN

84C88517

Year Built

1952

Stories in Building

1

Possession

Close Of Escrow

Data Source

MAXEBRDI

Origin MLS System

CONTRA COSTA

Bed

4

Bath

2

Parking

2

Carport - 2 Or More, Detached

SQ FT

2,178

SQ FT Source

Assessor Auto-Fill

Lot SQ FT

12,962.0

Lot Acres

0.3 Acres

Pool Info

None

Kitchen

Dishwasher, Free-Standing Range, Tile Counters, Range/Oven Free Standing

Cooling

Central Air

Disclosures

Disclosure Package Avail

Entry Level

Exterior Details

Back Yard, Front Yard

Flooring

Hardwood, Linoleum, Carpet

Foundation

Fire Place

Family Room

Heating

Forced Air

Laundry

Laundry Room

Main Level

4 Bedrooms, 2 Baths, Main Entry

Possession

Close Of Escrow

Basement

Crawl Space

Architectural Style

Traditional

Construction Status

Existing

Additional Miscellaneous Features

Back Yard, Front Yard

Location

Sloped Up, Back Yard

Roof

Shingle

Water and Sewer

Public

Fee

Unavailable

MLS and other Information regarding properties for sale as shown in Theo have been obtained from various sources such as sellers, public records, agents and other third parties. This information may relate to the condition of the property, permitted or unpermitted uses, zoning, square footage, lot size/acreage or other matters affecting value or desirability. Unless otherwise indicated in writing, neither brokers, agents nor Theo have verified, or will verify, such information. If any such information is important to buyer in determining whether to buy, the price to pay or intended use of the property, buyer is urged to conduct their own investigation with qualified professionals, satisfy themselves with respect to that information, and to rely solely on the results of that investigation.

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