Multi-Family Investing in Greater Boston: What the Numbers Have to Clear

Owner-occupying a two- or three-family is the most accessible route into Massachusetts investment property, because it lets you finance an investment asset on residential terms. A buyer who lives in one unit can typically use a low-down-payment owner-occupant loan on a two- to four-unit property, where a pure investor would face a much larger down payment and a higher rate.

Greater Boston is unusually well suited to this. The two- and three-family housing stock in Somerville, Medford, Malden, parts of Newton, and much of the inner ring is extensive and was built for exactly this purpose. The tradeoff is equally real: you become a landlord, and your tenants live in your building.

How Do You Underwrite One Honestly?

The number that matters is net operating income — all rental income, minus all operating expenses, before your mortgage. The failure mode for first-time investors is not overestimating rent. It is omitting expenses. A complete list includes:

• Property taxes, and an allowance for reassessment after your purchase
• Insurance, which is higher for a rental than for an owner-occupied single-family
• Water and sewer, frequently the landlord's responsibility in older Massachusetts multi-families with a single meter
• Heat and electricity for any unit or common area not separately metered
• Vacancy — assume some, every year, forever
• Maintenance and repairs — a real annual figure, not an optimistic one
• Capital reserves — roof, heating systems, and windows all fail eventually, on a schedule you can predict
• Property management, whether you pay someone or do it yourself. Your own time is not free; price it.
• Snow removal, landscaping, trash, pest control
• Legal and accounting

The two line items beginners omit almost universally are capital reserves and vacancy. A property that works only when nothing breaks and nothing sits empty does not work. Underwrite with both, at realistic numbers, before you decide the deal is good.

What Is Specific to Massachusetts?

• Security deposit law is strict and unforgiving. Massachusetts imposes specific requirements on how a deposit is collected, where it is held — a separate interest-bearing account in a Massachusetts bank — what statements must be provided, and how and when it must be returned. The penalties for getting it wrong can substantially exceed the deposit. Many experienced local landlords simply do not take security deposits, and take last month's rent instead. Understand the law before you collect anything.
• Lead paint. Massachusetts housing skews old, and the Lead Law imposes obligations on owners of housing where a child under six resides. This applies to rental property directly and is not optional.
• Local rules. Rental registration, inspection requirements, and occupancy limits vary by municipality. Check the specific city or town, not the state.
• The heating season. Massachusetts law requires landlords to provide heat during defined months, at defined minimum temperatures. A failing heating system is not a spring project.
• Tenant protections. Eviction is a court process, it is slower than new investors expect, and winter makes it slower still. Screen carefully; it is far cheaper than removing someone later.

How Does the Financing Differ?

Owner-occupied two- to four-unit property qualifies for residential financing, with down payment requirements far below investor terms. Lenders may count a portion of the projected rental income toward your qualifying income, which can meaningfully increase your buying power. Note that the Massachusetts ONE Mortgage program permits two- and three-family purchases with low down payments for eligible first-time buyers — see our first-time buyer guide.

Non-owner-occupied means investor terms: a substantially larger down payment, a higher rate, and reserve requirements.

Five units or more crosses into commercial lending entirely — different underwriting, shorter terms, and a balloon in many cases. The jump from four units to five is much larger than it sounds.

Plan to occupy for the period your loan requires. Buying with an owner-occupant loan while intending not to occupy is occupancy fraud.

Does House Hacking Actually Work?

Often, but not as effortlessly as it is described online. Living in one unit while tenants offset the mortgage genuinely accelerates ownership, and it is how a great many Greater Boston families built equity.

The parts people underweight: you are on call for your own building; your tenants are your neighbors, which makes every difficult conversation harder; and the properties are old, so maintenance is continuous rather than occasional. Some people find this a good trade for years. Some discover within six months that they do not want to be a landlord at all.

Be honest with yourself about which you are before you buy, because a two-family is much harder to unwind than a decision.

General information, not legal, tax, or investment advice.