Boston is built for this. Two-families and triple-deckers are everywhere, from Dorchester and Jamaica Plain to Quincy, Somerville, and beyond, and many first-time buyers here start exactly this way.
How it works
Because you’ll live in the building, lenders treat it as your home rather than an investment property, and that opens up much better financing:
- Low down payments: Since late 2023, Fannie Mae has allowed as little as 5% down on owner-occupied 2-, 3-, and 4-unit homes, down from the previous 15–25%, per The Mortgage Reports. Not every loan qualifies, and larger high-balance loans can require more down, so ask your lender early. FHA loans are another low-down-payment option, though three- and four-unit buildings must also pass a self-sufficiency test: estimated rent from all the units, less an allowance for vacancy and maintenance, has to cover the monthly payment. Investors who won’t live there typically need 25% down.
- Rent can help you qualify: Lenders can count a portion of the expected rent from the other units toward your income, which can help you qualify for a larger loan. Rules vary by loan type, so talk to a lender early.
- Higher loan limits: Conforming loan limits are higher for 2–4 unit properties than for single-family homes.
The tradeoff is that you become a landlord, which we cover below.
Why now could be the right time
With mortgage rates above 7%, a lot of buyers are sitting out. That’s exactly why a multi-family deserves a look right now:
- Rent offsets today’s higher rates. Freddie Mac put the average 30-year fixed rate at 7.40% in mid-October, per The Mortgage Reports. On a single-family home, you carry that whole payment yourself. On a multi-family, tenants’ rent covers part of it.
- Rental demand is steady. Greater Boston apartment vacancy was 4.9% in the second quarter of 2026, per Northmarq, and asking rents were up about 2% year over year through summer 2026, per CoStar. Units in good condition tend to rent.
- A slower pace. Multi-families in the city of Boston took a median 24 days to sell in April 2026, four days slower than a year earlier, per Redfin data via Boston 25 News. A slower pace, especially in late fall and winter, can mean more room to negotiate.
- Rates can change; the building stays. If rates come down later, owners may be able to refinance. Nobody can promise that, so buy only if the numbers work at today’s rate.
None of this makes every multi-family a good buy. It means the right one, priced well, can make more sense now than many buyers assume.
Running the numbers
This is where a feasibility check pays for itself. Before making an offer, we look at:
- Realistic rents for each unit, based on comparable rentals nearby, not the seller’s hopes.
- Full monthly costs: mortgage, property taxes, insurance, water and sewer, and any utilities you’ll cover.
- Vacancy and repairs: setting aside money for turnover and for older-building surprises like roofs, heating systems, and porches.
- Your real out-of-pocket cost: what you’ll pay each month after rent comes in, compared with renting your current place.
- Condition and compliance: whether units are legal, permitted, and up to code, which affects both financing and rentability.
If the numbers don’t work, it’s not the right building, and walking away is part of the process.
Being a landlord: what to know
Living next to your tenants makes things easier to manage, but Massachusetts landlords have real responsibilities:
- Fair housing: you must follow federal and state fair housing laws when advertising and choosing tenants.
- Existing tenants: when you buy an occupied building, its leases and security deposits generally carry over to you. If you plan to move into a unit that has a tenant, don’t assume it will be empty at closing. Make vacancy a written term of the Purchase and Sale Agreement and get your attorney’s advice.
- Security deposits: Massachusetts has strict rules on how deposits are collected, held, and returned.
- Lead paint: many Boston multi-families were built before 1978, and Massachusetts lead law can require deleading. Landlords cannot turn away renters because of it.
- Maintenance and response time: heat, hot water, and repairs are your job, not a building manager’s.
Many owner-occupants handle this themselves; others hire a property manager for leasing or repairs. Either way, it’s worth knowing the rules before you buy.
Thinking about buying a multi-family?
We run feasibility numbers on multi-families every week, from rent comps to monthly cost breakdowns. If you’re considering one, let’s look at the math together before you make an offer.
Grace Pettengill · The Pettengill Group at William Raveis · 16 Clarendon St, Boston, MA 02116 · 617-763-0902
Sources
- The Mortgage Reports: Fannie Mae’s 5% down multifamily loan
- The Mortgage Reports: Mortgage rates today, October 16, 2026
- Northmarq: Greater Boston Multifamily Market Insights, Q2 2026
- CoStar: Boston apartment rents stay hot through summer leasing season
- Boston 25 News: What type of home sells the fastest in Boston in 2026?
This content is for informational purposes only and does not constitute legal, tax, or financial advice. Loan programs, rates, and requirements change; consult a licensed lender and attorney about your situation. All real estate services are provided in compliance with federal, state, and local fair housing laws. We are pledged to the letter and spirit of U.S. policy for the achievement of equal housing opportunity throughout the nation. We encourage and support an affirmative advertising and marketing program in which there are no barriers to obtaining housing because of race, color, religion, sex, handicap, familial status, or national origin. Equal Housing Opportunity.