4439 Horner St

Welcome to this charming and well-kept home sitting on an impressive 7,500 sq ft lot in the highly sought-after city of Union City. The residence offers a warm and cozy interior, ideal for buyers seeking comfort and a property with long-term upside in one of the most desirable markets in the Bay Area. The expansive lot opens the door to exceptional potential — including the opportunity to build an ADU for additional living space or rental income. With a wide street that provides abundant parking and a generous backyard ready for future improvements, this property stands out as a rare find. A valuable combination of location, lot size, and investment flexibility makes this home a smart choice for both homeowners and investors looking to maximize returns in Union City.

Current Status

New

Original Price

$949,950

List Price

$949,950

On Market Date

Sep 26, 2026

Property Type

Detached

D/N/S

Union City

Zip Code

94587

MLS ID

41149567

APN

481158

Year Built

1898

Stories in Building

1

Possession

Seller Rent Back

Data Source

MAXEBRDI

Origin MLS System

BAY EAST

Bed

2

Bath

2

Parking

0

On Street

SQ FT

1,398

SQ FT Source

Public Records

Lot SQ FT

7,500.0

Lot Acres

0.17 Acres

Pool Info

None

Kitchen

Gas Range, Gas Water Heater, Counter - Solid Surface, Gas Range/Cooktop

Cooling

None

Disclosures

Nat Hazard Disclosure

Entry Level

Exterior Details

Back Yard

Flooring

Laminate, Tile, Carpet

Foundation

Fire Place

None

Heating

None

Laundry

Hookups Only, Laundry Room

Main Level

Other

Possession

Seller Rent Back

Architectural Style

Cottage

Construction Status

Existing

Additional Miscellaneous Features

Back Yard

Location

Level, Premium Lot, Rectangular Lot, Back Yard

Roof

Flat, 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.