What is house hacking?

What the strategy involves

House hacking turns your first home into your first rental. You live in one unit of a duplex, triplex or fourplex and rent out the other units. In a single-family property, you rent out spare bedrooms or a basement unit instead.

Lenders treat the home as your principal residence because you live in it. That changes the down payment you need. Four inputs decide whether the numbers work.

• Units: A 2- to 4-unit building, or a property with rooms you can rent out.
• Rent: What each unit or room rents for, judged from comparable rentals nearby.
• Payment: The mortgage, property tax and insurance you pay each month.
• Occupancy: You move in and live there as your main home.

A real example from a Homesage.ai report

Investment Property Search found 2 multi-family properties for sale in Milwaukee, Wisconsin on 2026-10-28. Both were rated good or excellent and had a verified rent of at least 0.8% of the price. This example uses the one listed at $135,000.

Verified rent here means the rent advertised on a recent rental listing for this property, checked in our listing data. No lease stands behind it.

Living in the property cuts the cash down from $33,750 to $6,750 at 5%, or $4,725 at the FHA minimum. Closing costs and cash reserves come on top.

At Freddie Mac's 7.32% average for 2026-10-22, the $128,250 loan costs $881 a month in principal and interest. Property tax and insurance bring the payment to $1,192 before mortgage insurance. Rent from the units you do not live in comes off that figure.

The tax uses the City of Milwaukee's 2.078% effective rate for taxes levied in 2025, from the Wisconsin Department of Revenue. Your bill follows the assessed value, which can differ from the price you pay. The insurance is the $923 Wisconsin average for a standard homeowners policy in 2023, from the NAIC homeowners report, so a quote today can differ.

What Milwaukee multi-family listings show

We counted multi-family listings for sale in Milwaukee, Wisconsin on 2026-10-19 with Investment Property Search. Multi-family is the listing's property type, which covers duplexes and other buildings with more than one unit.

Verified rent here means the rent advertised on a recent rental listing for each property, checked in our listing data. No lease stands behind it.

The 1% rule asks for monthly rent of about 1% of the price. 24 of the 90 listings with a verified rent reach it, or 27%. All 24 are listed at $300,000 or less.

Property condition matters more when you live in one of the units. Of the 74 listings with both a verified rent and a condition score, 14 are rated good or excellent, or 19%. Among the 18 that pass the 1% rule and carry a score, only 1 is.

Of the Milwaukee multi-family listings that pass the 1% rule and carry a condition score, 1 in 18 is rated good or excellent.

How to start house hacking

1. Pick the property type. A duplex gives you a separate unit to rent. In a property with spare rooms, you share your kitchen and living space with tenants.
2. Price the rent for each unit. Use 3 to 5 comparable rentals within a mile, as our guide to how much you can rent a property for explains.
3. Test the rent against the price. Divide the monthly rent by the list price. In Milwaukee, 24 of the 90 multi-family listings with a verified rent reach 1%.
4. Check the loan rules before you make an offer. FHA and Fannie Mae set different minimum down payments, and your lender sets the rest of the terms.
5. Plan to move in. Fannie Mae's standard Wisconsin mortgage form asks you to move in within 60 days of signing and to live there for at least one year.

What changes your cash and your payment

The loan program sets your cash at closing. The National Housing Act sets the FHA minimum at 3.5% of the appraised value. Fannie Mae allows up to 95% financing on a standard fixed-rate loan for a 2- to 4-unit home you live in, and 75% on a 2- to 4-unit investment property.

Closing costs come on top, at 2% to 5% of the loan amount, according to Freddie Mac. So do the cash reserves your lender asks for.

The mortgage rate sets the payment. Freddie Mac's mortgage survey put the 30-year fixed rate at 7.32% on 2026-10-22, the rate the example above uses. On a $285,000 loan at that rate, principal and interest come to about $1,958 a month.

Local rent sets how much of that a tenant covers. The typical rent in the Milwaukee metro was $1,549 in September 2026, according to Zillow's September market report. One tenant at that rent covers about 79% of the $1,958. Tax, insurance, vacancy and repairs come on top.

Common mistakes to avoid on a first duplex

• Counting the tenant's rent as profit: On the $300,000 example, one tenant at $1,549 covers about 79% of principal and interest. Tax, insurance and repairs still come out of your pocket.
• Buying the cheapest pass: Only 1 of 18 scored Milwaukee listings passing the 1% rule is rated good or excellent. Price the repairs before you offer.
• Moving out too soon: Fannie Mae's standard mortgage asks you to live in the home for at least one year. Read the occupancy clause in your own loan before you plan the next purchase.
• Treating a verified rent as a signed lease: A verified rent comes from one recent rental listing, and no lease stands behind it. Check 3 to 5 comparable rentals for every unit before you count on it.

Estimated values. Not investment advice. Data as of 2026-10-28. City counts as of 2026-10-19.

Frequently asked questions