509 S B Street, Monmouth, IL 61462

Listing agent John Doyle Show Phone

Listing office Doyle & Associates Realty, LLC 401 North Main St., Monmouth, IL Show Phone

Listing date Mar 13, 2026

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MLS# 11673172 Listing URL

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Overview

This two-story duplex is arranged as two separate apartment units, with a divided basement providing access to both the north-side and south-side areas from inside the home. The north side apartment is partially finished and presently rented, while the south side apartment is described as a work in progress. The owner indicates that the two central-air units and furnaces were installed prior to his purchase. Exterior improvements include new siding, exterior doors, and windows in 2020, along with shingled roof work on the main structure completed in 2016. A shingled roof over the entry porch is also noted as being just a few years old.

The property sits on a corner lot, and it is being sold "As is."

For buyers or tenants seeking a duplex with two distinct unit spaces and separate basement areas, this configuration may support a variety of occupancy and management approaches. With one unit currently rented and the other described as unfinished, the property may be best suited for an operator comfortable with completing work on the south-side unit while maintaining the north-side tenancy.

Suggested Use

Real Estate Agency Building Supply Parking Lot & Garage Grocery & Convenience Store Electrical Service (Bike/Boat/Book/etc) Store Travel Agency Garden Center Cosmetic Store Shopping Center & Mall

Zoning and permitted uses should be independently verified with local authorities.

Location Insight

• Map
• Local Demand

City

Monmouth

County

Warren

State

Illinois

Longitude

-90.650799

Latitude

40.907475

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FAQs

What type of property is this?

Duplex - Two-unit duplex with partial finish work, central air units, and recent exterior updates, sold as-is.

Where is this duplex located?

The property is located at 509 S B Street Monmouth, IL.

What is the asking price?

The asking price for this property is $54,900.

What are key features of this property?

This property features: Two‑story home with two apartments; north side apartment partially finished and presently rented, south side apartment work in progress; Basement is divided north side and south side, with interior access to both areas; Central‑air units and furnaces installed prior to current owner’s purchase (owner stated)