House hacking is the strategy of buying a small multifamily property, living in one unit, and renting out the others so that tenant income offsets your housing costs. For many people it is the most accessible entry point into real estate investing, largely because of how the financing works.

Why Owner-Occupancy Changes the Math

Mortgage programs distinguish between primary residences and investment properties. Investment property loans typically require larger down payments and carry higher pricing. But when you live in one unit of a property with up to four units, lenders generally treat the whole building as your primary residence.

That classification can open the door to owner-occupant loan programs, which often feature lower down payment requirements and more favorable pricing than investor loans. FHA financing, for example, is available for properties with up to four units when the borrower occupies one, and conventional and VA programs have their own multi-unit provisions. Requirements change over time, so confirm current terms with your lender.

How Lenders View the Rental Income

A common question is whether the rent from the other units helps you qualify. Often it can, in part. Lenders typically use an appraisal-based market rent analysis or existing lease agreements, and they generally count only a portion of expected rent to allow for vacancies and expenses. Program rules differ, including reserve requirements and, for some FHA multi-unit purchases, a self-sufficiency test on larger properties. Ask your lender exactly how they will treat projected rent before you set your budget.

Occupancy Rules Are Not Optional

Owner-occupant financing requires that you genuinely move in, usually within a set period after closing, and occupy the property as your primary residence for at least a year under most programs. Misrepresenting occupancy to get better loan terms is mortgage fraud. Plan to actually live there, and treat the first year as part of the strategy.

Practical Considerations Before You Commit

  • Being a landlord is a job. You will live next door to your tenants, handle maintenance calls, and manage vacancies.
  • Underwrite conservatively. Budget for repairs, vacancies, insurance, and taxes, and make sure you could carry the full payment if a unit sat empty.
  • Check local rules. Zoning, rental licensing, and tenant regulations vary widely by city.
  • Inspect thoroughly. Multi-unit buildings have more systems, more roofs over more heads, and more ways to surprise you.

The Long Game

After satisfying the occupancy period, many house hackers move on and keep the property as a full rental, then repeat the process. Done patiently and within program rules, it is a gradual, financing-friendly way to build a portfolio while keeping your own cost of living in check.

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