Chicago 2–4 Unit Apartment Building Guide | Multifamily Resource Center

Chicago 2–4 Unit Apartment Building Guide

Chicago two-flats, three-flats, and four-flats are some of the most common multifamily properties in the city. These buildings are often purchased by both real estate investors and owner-occupants who live in one unit while renting the others. This “house-hacking” strategy is one reason Chicago two-flats, three-flats, and four-flats remain popular entry points into multifamily real estate investing.

Because these properties can function as both homes and investment properties, they come with a unique set of financial, legal, and operational considerations. Buyers and sellers often have questions about financing, leases, property valuation, zoning, and local Chicago housing rules.

This resource guide brings together a collection of articles designed to help buyers, sellers, and property owners better understand how Chicago 2–4 unit apartment buildings work.

Chicago Building Types

Two-flats, three-flats, and four-flats make up a large portion of Chicago’s small multifamily housing stock. These buildings are often brick structures built between the early 1900s and mid-1900s and are found throughout many Chicago neighborhoods.

Learn more about each building type:

• Chicago Two-Flats
• Chicago Three-Flats
• Chicago Four-Flats

Buying and Selling a 2–4 Unit Building

Buying or selling a multifamily property is different from buying or selling a single-family home. Factors such as leases, tenant rights, rental income, and building operating expenses all play a role in determining the value of the property.

Helpful guides include:

• Buying a 2–4 Unit Apartment Building
• Selling a 2–4 Unit Apartment Building (With Tenants vs Vacant Units)
• Transfer of Leases and Security Deposits at Closing
• Tenant Estoppel Letters

Financing and FHA Loans

Many Chicago 2–4 unit buyers use specialized financing programs. Some buyers purchase these buildings as investment properties, while others purchase them as owner-occupied properties and live in one unit.

Financing guides:

• Financing 2–4 Unit Apartment Buildings
• FHA Loans for 2–4 Unit Properties
• FHA Inspection Requirements for Multifamily Homes
• Common FHA Repair Issues in Chicago Buildings
• FHA Appraisal vs Home Inspection

Chicago Laws and Regulations

Chicago has a number of local housing laws and regulations that affect multifamily property owners. Understanding these rules can help both buyers and landlords avoid surprises after purchasing a building.

Important Chicago housing topics include:

• Chicago Zoning Certificate Explained
• Non-Conforming or "Illegal" Apartments in Chicago Buildings
• Chicago ADU Ordinance Explained
• Chicago Rent Increase Rules and Fair Notice Ordinance
• Summary of Rights for Safer Homes Act

Investment and Financial Topics

Small multifamily buildings are also investment properties. Understanding expenses, property valuation, and tax strategies can help owners make more informed decisions.

Investment and financial guides:

• Chicago Multifamily Operating Expenses
• How Apartment Buildings Are Valued
• Capital Gains Taxes When Selling an Apartment Building
• 1031 Exchange Guide for Multifamily Property
• 1031 Exchange into a Delaware Statutory Trust

Chicago Apartment Market Data

Reviewing real market data can help buyers and sellers better understand how Chicago 2–4 unit apartment buildings are trading in the current market.

Helpful market data resources include:

• Chicago 2–4 Unit Sales Data – Page 1
• Chicago 2–4 Unit Sales Data – Page 2

Frequently Asked Questions

What is a 2–4 unit apartment building?
A 2–4 unit building is a small multifamily property containing between two and four residential units.

Can you live in one unit of a multifamily building?
Yes. Many buyers live in one unit while renting the other units.

Are 2–4 unit buildings residential or commercial?
Buildings with four or fewer units are usually residential, while five or more units are considered commercial real estate.