Chicago's two-flats, three-flats and four-units have been a path to building wealth for generations. They're still a good investment for the right buyer at the right price. But with mortgage rates above 7%, the math is tighter than it was a few years ago, and the buildings that work look different from the ones that don't. Here's how to tell them apart.
Financing: Plan on 25% Down
Low-down-payment programs for 2-4 unit buildings are for owner-occupants. If you won't live in the building, expect to put down 25% on a conventional loan. Investor loans also tend to carry higher interest rates than owner-occupied loans, and lenders usually want to see cash reserves after closing.
If you're open to living in the building for a year or more, the numbers change dramatically. See House Hacking in Chicago: Buying a Two-Flat With 5% Down.
Run the Numbers the Way a Lender Would
Here's an illustrative $750,000 two-flat with both units rented at $2,400 a month:
Annual | |
|---|---|
Gross rent (2 × $2,400 × 12) | $57,600 |
Less 5% vacancy | −$2,880 |
Property taxes (est.) | −$12,000 |
Insurance (est.) | −$3,000 |
Water, sewer and other owner-paid utilities (est.) | −$1,800 |
Repairs and capital reserve (8% of rent collected) | −$4,378 |
Net operating income | $33,542 |
Mortgage: $562,500 at ~7.95% | −$49,294 |
Annual cash flow | −$15,752 (about −$1,313/month) |
All figures illustrative. Investor rate assumed above the Oct. 22, 2026 Freddie Mac average of 7.32%.
That building earns a 4.5% cap rate (net operating income divided by price). At today's rates, a 25%-down purchase needs a cap rate of roughly 6.5% just to break even. At this building's income, that means a price closer to $510,000 than $750,000.
That doesn't mean the building is a bad buy. It means it only works if something else is true: rents are below market and can rise, you'll pay much more than 25% down, you're buying for long-term appreciation and can carry the shortfall, or you'll live there. Know which one it is before you make an offer.
Verify the Income
The seller's rent roll is the starting point, not the answer.
- Read every lease. Confirm rents, terms, what's included and when each lease ends.
- Match rents to deposits. Ask for bank statements or a rent ledger showing what was actually collected.
- Ignore pro-forma rents. "Could rent for" isn't income. Underwrite current rents and treat upside as a bonus.
- Check tenancy length. In Chicago, raising rent or ending a lease for a tenant of more than three years requires 120 days' notice. Rent upside takes time to capture.
- Confirm security deposits. Deposits and interest transfer to you at closing, and you take on responsibility for them. Make sure the amounts and records are right.
Budget for the Building, Not Just the Units
Most Chicago two-flats are 90 to 120 years old. The expensive items are predictable, so price them in before you buy:
- Masonry and tuckpointing
- Roof (flat roofs on many two-flats need regular attention)
- Rear porches, which the city regulates closely
- Boilers and water heaters
- Electrical service and wiring, especially in buildings with older systems
- Sewer lines; a camera inspection is worth the cost
Get a thorough inspection, and ask for receipts and dates for major work the seller has done.
Plan for Property Taxes
Taxes are usually the largest operating expense on a Chicago multi-unit. Cook County reassesses property every three years, and a sale at a higher price can draw attention to a building's value. Don't assume next year's bill will match the seller's. Look at the assessment history, and if the seller has an owner-occupant exemption, expect your bill as an investor to be higher.
Know Your Exit
Think about who you'll eventually sell to. A well-kept two-flat in a strong neighborhood can sell to an owner-occupant, often the widest and highest-paying market. Some larger buildings may have deconversion potential. Keep clean records from day one; they'll support your price when you sell. See How to Build a Rent Roll Before You Sell Your Chicago Two-Flat.
The Bottom Line
At today's rates, the Chicago multi-units that work for investors usually have below-market rents with room to grow, a price that reflects real income, or a buyer with enough equity to carry it. Run the numbers honestly before you fall for the building. Our free Chicago 2-4 Unit Checklist has an investor section, and our page for Chicago multi-unit specialists covers buying, selling and financing.
Talk to Joe and Katherine Tighe. Email [email protected], call Joe at (312) 345-5353, or call Katherine at (708) 847-9913.
This post is general information, not financial, tax or legal advice. Run your numbers with a lender and tax professional.
