A four-word change put 124,400 Massachusetts buildings under the condo conversion law
A four-word change put 124,400 Massachusetts buildings under the condo conversion law
2026-09-10 · Massachusetts · Legislation
What happened. The single most consequential change to Massachusetts condominium conversion law in thirty years is four words long, sits in section 57 of a 143-section housing act, and has been in force since 6 August 2024.
Section 57 of Chapter 150 of the Acts of 2024 — the Affordable Homes Act — amends the definition of “Housing accommodation” in section 3 of the Condominium Conversion Act, Chapter 527 of the Acts of 1983, by striking the word “buildings” the first time it appears in clause (iii) and inserting “owner-occupied buildings.”1
What that does
The conversion statute exempts small buildings. After the amendment, that exemption runs only to owner-occupied small buildings.
The consequence: a non-owner-occupied building with fewer than four units — the classic Massachusetts two- or three-decker held as an investment — is now a “housing accommodation” covered by the conversion statute, with all of the tenant notice and purchase-right machinery that follows.
The scale
The Metropolitan Area Planning Council estimates the amendment brings 124,400 two- and three-family buildings, containing about 287,200 homes, into coverage — taking the total covered stock from roughly 45,000 buildings to about 169,000.2
That is close to a quadrupling of the statute's reach, accomplished without amending a single operative provision of it.
What coverage means
For a tenant in a covered building facing conversion:
- Minimum notice before a conversion eviction of one year
- Extended to two years for tenants aged 62 or older, households below 80 percent of area median income, and people with disabilities
Stricter local ordinances exist in several Massachusetts cities and operate separately from and on top of the state act.
Where this bites: association formation
The practical audience for this change is not existing associations. It is anyone creating one.
A developer or owner converting a tenanted two- or three-family building to condominium form must now run the c. 527 process — notice, the tenant's right to purchase, and the notice periods above — before units can be sold. That is a timeline change measured in years, not weeks, and it lands on exactly the transaction that has been the engine of new Massachusetts condominium creation for four decades.
Three practical points follow.
Vacancy is now a development strategy with legal weight. The statute reaches occupied housing accommodations. What that means for a building vacated before a master deed is recorded is a question for counsel on the specific facts, and it is precisely the question the amendment was written to make harder to answer casually.
Owner-occupancy is now a status that has to be established, not assumed. The exemption turns on it. In a three-family where the owner lives in one unit and rents two, the building is owner-occupied and the exemption applies; where the owner has moved out and rents all three, it does not.
The local overlay is often the harder one. Boston's conversion ordinance carries a $1,000 per unit permit fee, penalties of $300 or more per violation per day, and relocation payments and lease extensions more generous than the state act — and the Boston City Council passed an expanded version in a new draft on 3 December 2025 by a vote of 11 in favour, none against, one not present.3 Several other cities have their own ordinances, adopted by a two-thirds local vote as the 1983 act permits.
What it means for an existing association
Directly, very little — c. 527 governs conversion, not the operation of a condominium once created. But two second-order effects are worth naming.
New small associations will arrive later and in smaller numbers. A two-year notice obligation on a two-unit conversion changes the arithmetic of a project that was previously a matter of recording a master deed. Whatever one thinks of the policy, fewer new small condominiums is the predictable direction.
Title and marketability. A conversion carried out without complying with c. 527 where compliance was required is a defect that surfaces at a later sale, when a buyer's counsel or a title examiner looks at how the condominium was created. For a building converted after August 2024, that question now has to be asked of a much larger set of properties than before.
A caution on relocation payments
Figures circulate for relocation payments under the state act, and they should be treated carefully. The MAPC analysis discusses illustrative moving costs in the range of $8,000 to $10,000 for a two-bedroom home — that is an illustration of cost, not a statutory figure. Municipal ordinances do set specific payment amounts; Boston's are set by its ordinance, not by c. 527. Anyone budgeting a conversion should read the applicable local ordinance rather than a state-level number.
What to watch next
Two things. Whether the Boston ordinance's new draft, passed in December 2025, extends coverage below four units in a way that stacks on the state change — the amended text was not published on the city's ordinance page at the time of writing, and the council minutes record only that it passed in a new draft. And whether any Massachusetts appellate court is asked what “owner-occupied” means at the moment of conversion, which is the only genuinely ambiguous word in the amendment.
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