09/08/2026
Two flats are a Chicago classic. Whether you’re planning to live in one unit and rent the other or use the property as an investment, there are a few things buyers should look into before closing.
🏙️ Check the zoning & legal use
Make sure the property is legally recognized as a two-unit building and that its current use matches the city’s records.
📋 Look into permits
Chicago has plenty of older two-flats with finished basements, converted spaces, additions, or other improvements. Make sure you understand whether the work was properly permitted.
🏠 What about the basement?
A finished basement doesn’t necessarily mean it can legally be used as a bedroom or separate living unit. Check the property’s legal use before assuming that extra space can be rented or occupied.
👤 Is there already a tenant?
If one unit is occupied, review the lease and understand the seller’s obligations regarding the tenancy, security deposit, and possession of the property.
💡 Check those utilities
Are utilities separately metered? Who pays for water, gas, and electricity? These details can make a big difference when you’re planning to live in one unit and rent the other.
🔍 Don’t skip the inspection
Many Chicago two-flats are older buildings, so it’s important to understand the condition of the roof, masonry, plumbing, electrical, HVAC, sewer line, and other major systems.
A two-flat can be a great opportunity, but there’s more to evaluate than the number of units. Zoning, permits, tenants, utilities, and the condition of the building can all matter before you move forward.