Buying a 2–4 Family Home to Live In (House Hacking) in Greater Boston

Buying a two-, three- or four-family home and living in one of the units is one of the most popular ways to buy in Greater Boston. Many people call it “house hacking.” You live in one unit, rent the others, and the rent helps pay the mortgage. Because you live there, you can usually use owner-occupant loans, which often need a much smaller down payment than an investment property loan.

In cities like Chelsea, Everett, Revere, Lynn, Malden, Somerville and parts of Boston, the classic triple-decker (three stacked units) has helped generations of families build wealth. This guide explains how the financing works, how lenders look at rental income, and what you take on as a landlord in Massachusetts.

Why buy a 2–4 family as your home?

• Rent helps with the payment. Income from the other units can cover part, or sometimes most, of your monthly costs.
• Owner-occupant financing. Because you live there, you can often use FHA, conventional, VA or MassHousing loans with low down payments.
• Room for family. Many buyers use one unit for parents, adult children or relatives.
• A path to investing. After you have lived there and learned the ropes, the property can become a long-term rental. See our guide to investing in multi-family property.

Loan options for owner-occupants

FHA loans: 3.5% down

FHA loans can be used for 1–4 unit homes when you live in one unit. With a credit score of 580 or higher, the minimum down payment is 3.5%, according to HUD. FHA also has loan limits that rise with the number of units. For 2026, HUD set national limits ranging from $693,050 to $1,599,375 for a two-unit home, $837,700 to $1,933,200 for three units and $1,041,125 to $2,402,625 for four units, depending on the county. Your lender can tell you the exact limit for your county.

For three- and four-unit homes, FHA uses a “self-sufficiency test.” In simple terms, about 75% of the appraiser’s estimated market rent for all units (including yours) must cover the full monthly payment: principal, interest, taxes, insurance and mortgage insurance. Some triple-deckers do not pass at today’s prices, so ask your lender to run this test early.

Conventional loans: 5% down is allowed

Since November 2023, Fannie Mae has allowed as little as 5% down on owner-occupied two-, three- and four-unit homes. Fannie Mae’s Eligibility Matrix (April 2026) still shows a maximum loan-to-value of 95% for a 2–4 unit principal residence purchase on standard conforming loan amounts. Before this change, buyers usually needed 15% to 25% down for a conventional loan on these homes.

Two details matter in Greater Boston:

• Loan size. The 95% option applies to standard conforming amounts. Larger “high-balance” loans have stricter limits in Fannie Mae’s matrix (for example, 85% for two units and 75% for three to four units).
• Loan limits. For 2026, FHFA set the baseline one-unit conforming limit at $832,750, with higher limits for 2–4 unit homes and for high-cost areas like Greater Boston.

MassHousing

MassHousing works through more than 80 partner lenders and offers loans for single-family homes, condos and 2–4 family homes that will be your primary residence in Massachusetts. Income limits apply. MassHousing’s down payment assistance offers up to $30,000 for eligible first-time buyers in every city and town, and its MI Plus mortgage insurance can cover your principal and interest for up to six months if you lose your job. Minimum credit scores range from 640 to 700 depending on the loan and property type. See our guide to first-time buyer programs.

VA loans

Eligible veterans and service members can use a VA loan for a home of up to four units if they live in one. Read our veterans guide for details.

How lenders count rental income

Lenders do not simply add the full rent to your paycheck. Each program has its own rules, and they depend on things like:

• Existing leases. Signed leases that transfer to you, plus proof that tenants are paying, help a lot.
• The appraisal. The appraiser estimates market rent for each unit. Lenders usually use only part of that rent to allow for vacancies and repairs.
• Landlord experience. Fannie Mae’s current guide treats borrowers with at least 12 months of property management experience differently from first-time landlords. If you have never been a landlord, the rent may count only toward the new home’s payment, not as extra income.

Rules change often, so get a full pre-approval from a lender who regularly finances 2–4 family homes before you make offers.

Landlord basics in Massachusetts

Once you close, you are a landlord. Massachusetts has some of the most detailed tenant protection laws in the country. A few key points:

• Lead paint. Most triple-deckers were built long before 1978. Under the Massachusetts Lead Law, if a child under 6 lives in a pre-1978 unit, the owner must delead it or bring it under interim control. If a child under 6 will live in the home after you buy, you have 90 days from taking title to do so. Sellers must give buyers the Property Transfer Lead Paint Notification before you sign the Purchase and Sale Agreement.
• Security deposits and last month’s rent. Massachusetts has strict rules about what you can collect and how you hold it. Mistakes can be costly. Learn the rules before you collect anything.
• Existing tenants. When you buy, the current tenants and their leases usually come with the property. Plan your move-in around their leases.
• Smoke and CO alarms. Before the sale, the local fire department inspects and issues a certificate showing the home meets smoke and carbon monoxide alarm rules.
• Insurance. You will need an owner-occupied multi-family policy, not a standard homeowner policy. Ask about liability and loss-of-rent coverage.

Our guide to being a landlord in Massachusetts covers these rules in more depth.

What to check in a Greater Boston triple-decker

• Heating systems and utilities. Separate heat and electric for each unit can lower your costs. Shared systems mean you may pay for everyone’s heat.
• Porches and stairs. Rear porches and egress stairs are common repair items in older multi-families.
• Roof, foundation, wiring and plumbing. Many of these homes are over 100 years old. A thorough home inspection is a must.
• Legal unit count. Check with the city that the number of units matches building and assessor records. An “in-law” or basement unit may not be legal.
• Rent levels. Compare current rents with market rents so you know your real numbers.

Step by step

1. Talk with a lender who knows 2–4 family loans and compare FHA, conventional, MassHousing and VA options.
2. Build a budget that includes vacancies, repairs, insurance and taxes, not just the mortgage.
3. Tour properties and ask for rent rolls and lease copies.
4. Make your offer, then inspect carefully.
5. Close with your attorney, and set up a clear plan for collecting rent and handling repairs.

How Luis can help

Luis has helped buyers purchase two- and three-families across Greater Boston for more than 30 years. Our team can help you compare properties, review rents and connect with lenders who know these loans, in English or Spanish. Book a free 15-minute call to talk through your plan.