18127 Madison Ave

2 Homes- Rare chance to own a large, versatile property in a premium location, surrounded by nature yet close to everything. Don’t miss this exceptional opportunity to own two spacious homes plus an attached in-law unit on a gated, .98-acre lot in one of Castro Valley’s most sought-after neighborhoods. Tucked away on a private road, this estate offers privacy, serenity and flexibility—perfect for multigenerational living, rental income, remote work, or business opportunity. Bring your vision—Both homes could benefit from updating, the potential is limitless to transform this into your dream compound or income-producing investment. Front Home has approximately 3,000 sq ft of living space ,5 bedrooms, Solar panels for energy efficiency. Spacious kitchen with granite countertops. Attached in-law unit with seperate entrance and fenced yard. Back home features approximately 1,850 sq ft, 4 bedrooms, 2 bathrooms. Spacious living, dining, and laundry room. Each home has its own gated access and driveway . Ample parking pads for RV's, boats, and multiple vehicles. Low maintenance landscaping with mature fruit trees: tangerine, lemon, pomegranate, and pomelo. Minutes from top-rated schools, Castro Village Shopping Center, CV Marketplace, BART and freeways.

Current Status

New

Original Price

$2,525,000

List Price

$2,525,000

On Market Date

Aug 21, 2025

Property Type

Detached

D/N/S

Castro Valley

Zip Code

94546

MLS ID

41108905

APN

84C92017

Year Built

1945

Stories in Building

2

Possession

Close Of Escrow

Data Source

MAXEBRDI

Origin MLS System

CONTRA COSTA

Bed

9

Bath

5.5 (5/1)

Parking

0

Parking Lot

SQ FT

4,930

SQ FT Source

Public Records

Lot SQ FT

42,851.0

Lot Acres

0.98 Acres

Pool Info

In Ground, Outdoor Pool

Kitchen

Dishwasher, Gas Water Heater, Stone Counters, Tile Counters, Eat-in Kitchen

Cooling

Central Air

Disclosures

Disclosure Package Avail

Entry Level

Exterior Details

Back Yard, Front Yard, Garden/Play, Side Yard, Yard Space

Flooring

Hardwood, Tile

Foundation

Fire Place

Family Room, Living Room

Heating

Forced Air

Laundry

Laundry Closet

Main Level

6+ Bedrooms, 3.5 Baths

Possession

Close Of Escrow

Basement

Crawl Space

Architectural Style

Contemporary, Ranch

Non-Master Bathroom Includes

Shower Over Tub, Double Vanity

Construction Status

Existing

Additional Miscellaneous Features

Back Yard, Front Yard, Garden/Play, Side Yard, Yard Space

Location

2 Houses / 1 Lot

Roof

Composition Shingles

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.