18508 Madison Ave

Tucked along a quiet Castro Valley street, this inviting home offers the perfect balance of timeless character, everyday comfort, and exciting potential. From the moment you arrive, there's a sense that this is a home that's been thoughtfully cared for and is ready for its next chapter. Inside, hardwood floors add warmth throughout much of the home, while the functional four-bedroom, two-bath layout provides flexibility for growing families, remote work, or multigenerational living. Every space feels comfortable, welcoming, and filled with natural light. The heart of the home is the expanded dining room, where walls of windows frame views of the backyard and create an airy gathering space for everything from casual breakfasts to holiday celebrations. It's a room designed for connection and one that naturally draws everyone together. Outside, the property continues to impress with multiple outdoor spaces to relax, entertain, garden, or simply enjoy the peaceful surroundings. Above the backyard, the detached structure has been transformed into a versatile bonus room. Beneath it, a spacious workshop offers exceptional flexibility for hobbies, storage, creative studio, or the potential to explore an ADU conversion (buyer to verify). Whether you're looking for a home to enjoy immediately or one you can thoughtfully personalize over time, this property offers the rare combination of move-in-ready comfort, versatile spaces, and the opportunity to build lasting value in a desirable Castro Valley location.

Current Status

Contingent-

Original Price

$1,225,000

List Price

$1,175,000

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

4

Carport - 2 Or More

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

No Air Conditioning

Disclosures

Disclosure Package Avail

Entry Level

Exterior Details

Back Yard, Front Yard

Flooring

Hardwood, Linoleum, Carpet

Foundation

Fire Place

Family Room

Heating

Zoned

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.

School data provided by GreatSchools. School service boundaries are intended to be used as reference only. To verify enrollment eligibility for a property, contact the school directly.