Will Brookline need a sixth override?
Brookline has asked its voters for an override five times since 2005, most recently in May 2026.
A reasonable person watching that pattern has one question: does this keep happening? And if we would rather it didn't, what would actually have to change?
The answer turns out to be more encouraging, and more specific, than the pattern suggests. But it takes about four minutes and one piece of arithmetic to see why.
The Town cannot simply collect more
Start with the constraint everything else follows from.
When your home's assessed value goes up, the Town does not get more money. Under Proposition 2½, the total amount Brookline is allowed to collect from all property owners combined can rise by only about 2.5% a year, no matter what happens to house prices. Rising values change how that fixed total is divided up among owners. They do not change the total.
There are exactly two ways the Town can collect more than that 2.5%:
- Construction and renovation. When something is built, renovated, or converted, the value that adds gets included on top of the 2.5%, permanently, with no vote required.
- An override. Voters agree at the ballot to raise the ceiling. It is permanent, and it compounds: every future year's 2.5% is calculated on the larger base.
There is a third thing that looks like an override and isn't. A debt exclusion pays for a specific building, most recently a new school, and it expires when that bond is paid off. It is matched dollar for dollar against that debt, so it does not fund day-to-day operations at all. None of what follows is about school buildings.
Why costs keep outrunning it
Since 2005, Brookline's operating spending has grown at about 3.65% a year. The cap allows 2.5%. That gap is the whole story, and it comes from two places.
Employee benefits, pensions and health insurance for current and retired staff, have grown at about 5.5% a year. Retirees drawing a pension are growing nearly three times as fast as active employees. Very little of this responds to any decision made in a given budget year.
Schools have grown at about 4.5%, and the arc behind that number has two halves. Enrollment rose by nearly a third between 2005 and 2019, from 5,984 students to 7,855, which is what drove the school construction of that period and three of the four overrides. Then it fell back, to 7,023. Staffing fell too, but by less: after 2019 enrollment fell about 11% and staff about 5%.
What did not fall is the level of need. Students with individual education programs went from 999 to 1,270, up 27%, while total enrollment was dropping. Special education is more staff-intensive by law and by design. The district now has 5.6 students per staff member, against 6.75 in 2011: more staff per student than it had, a different mix of them, for a student population with different needs, in buildings sized for a larger district.
Everything else the Town does, police and fire, public works, libraries, general government, has grown at about 2.5% a year, almost exactly what the cap allows.
Sort every dollar of the growth in annual spending by cause and a clearer picture appears. Between 2011 and 2025, the town's yearly General Fund spending rose by $177 million. 42% of that was inflation: the same staff doing the same work as pay, prices and health premiums rose. Only 5% came from new homes and commercial space. And about a third came from decisions Brookline made itself: how many staff to employ per student, what to build and borrow for, how to fund retiree health, and how its pay compared with public-sector pay nationally. Most of the cost of running Brookline is not more people. It is what the same people cost.
What we control, and what we don't
Here is the sorting that reframes the whole conversation.
Over the twenty years to 2025, Brookline's operating costs grew at 3.65% a year. The revenue that arrives without anyone voting on anything grew at 3.52%. The shortfall is about a tenth of a percentage point a year, and across twenty years that is what the overrides were for.
Split that revenue into what the Town sets and what the state sets, and the two halves behave completely differently.
The part Brookline controls kept pace. The levy limit, with the Town's own construction and renovation and no overrides at all, grew at 3.91% a year, faster than costs. The fees Brookline sets for its own services grew at 3.49%. Proposition 2½ plus Brookline's own new growth was, on its own, enough.
The part it does not control did not. State aid grew at 1.99% a year. It fell in absolute terms after 2008, bottomed 15% below its starting point in 2012, and took until about 2015 to get back to where it began.
Had state aid simply kept pace with costs, it would have been $34.4 million in 2025 rather than $24.9 million. That single shortfall of $9.5 million a year accounts for 87% of the entire gap.
This is not a Brookline story. Unrestricted local aid across Massachusetts has fallen 25% in real terms since 2002. Brookline is not failing at something other towns are managing; it is experiencing the same thing they are.
Which gives the whole problem its shape. The revenue sources Brookline does not control are not growing fast enough to carry modern cost growth, which means the levers it does control have to do more. Brookline should keep pressing on the part it does not control, and there is an active campaign at the state level for roughly $351 million more in unrestricted aid that deserves support. But a plan that depends on winning that argument is not a plan.
Where the $175 million in FY2005→FY2025 property tax growth actually came from
Every dollar of growth in what Brookline is allowed to collect, FY2005–2025, by where it came from. The bottom band is the property that already existed in 2005; the three above it are the only ways the total can rise.
What that means for the next fifteen years
Running that arithmetic forward to 2040, starting from the budget Town Meeting adopted in May 2026 and assuming costs keep behaving the way they have, gives a result worth stating plainly: the override leaves room. Revenue stays about $10 million to $19 million a year ahead of spending through the 2030s, and no further override is needed before 2040.
That room is real, and it is small next to four decisions that will use it. Each is worth $20 million to $46 million a year by 2040:
- Pay settlements. One extra point of pay growth a year for all staff costs about $46 million a year by 2040. The teachers' contracts expired in August and are being negotiated now.
- Health insurance. Premiums rising 10% a year instead of 8% cost about $32 million a year by 2040.
- School staffing as enrollment changes. If enrollment keeps falling, as one of the district's two demographic forecasts projects, and staff follow it down, 2040 improves by about $22 million a year.
- The pension turn. When the pension fund is fully funded in 2030, about $37 million a year of catch-up payments ends. The Town plans to put it toward retiree health, its largest remaining unfunded liability. That is a $35 million decision.
If pay runs a point high, the room is gone by about 2035. If pay and premiums both run high, by about 2033. Either way, the next override is a question of choices made in the next few years, not of arithmetic already fixed.
The lever nobody lists
The usual conversation has three levers: cut what the Town provides, ask voters for more, or grow the tax base.
Cutting deserves an honest word, because it is the lever most often assumed to be off the table. It isn't. The Town's own Expenditures and Revenues Study Committee spent a year looking for savings and found real ones, a solar project that will avoid about $390,000 a year in electricity costs, and others still being studied. But cutting services means giving up things residents actively value: schools, libraries, parks, public safety. Brookline has consistently chosen not to, and that is a defensible choice rather than a failure of discipline.
The fourth lever is the one the list leaves out, and it is the largest: what the Town pays for the services it already provides. Pay settlements, the health plan, how staffing follows enrollment, and what the pension savings are used for. None of these cuts a service. Each is a decision Brookline makes anyway, every year, in bargaining, benefit design and the school budget. Each is worth more than any plausible difference in how fast the town grows. They deserve to be made deliberately, with the numbers in front of us, rather than by default.
What growth is worth
Growth is still worth pursuing, and the kind matters more than the amount.
Brookline's tax base has grown from construction and renovation at about 1.28% a year recently, slower than most comparable places. Each added tenth of a percentage point, sustained, is worth about $9 million a year by 2040 if it comes from renovation, and only about $2 million if it comes from new housing alone.
The difference is cost. A typical new home in Brookline, most of them rental and worth about $430,000, pays roughly what its share of Town services and its children's schooling costs. Whether a given building comes out ahead depends on its value and who lives in it: an average condominium covers up to about 0.7 school-age children per home, a large rental building about 0.2. Renovation and commercial space add tax without adding students.
Most of the growth is renovation
Most of Brookline's growth is not new buildings. It is money invested in buildings that already exist: additions, gut renovations, finished attics, rebuilds on the same lot. Of the part of the town's growth that is real estate, 76% is investment in existing property.
Over the eight years to 2025, that renovation added $445 million of assessed value, more than all new construction did, while adding no net new housing units at all.
That combination is unique. Every new housing project has to earn its keep against the cost of the people who move in, mostly schools. Renovation generates none of that cost, by definition. It is the one form of growth that is unambiguously positive for the Town's budget, and the one that asks nothing of anyone worried about traffic, school crowding, or the character of a street.
So what would it take to add meaningfully to the room? About a quarter more renovation than Brookline already does would add about $19 million a year by 2040, more than all the room the override leaves that year.
There is a homeowner's version of that number. The familiar rule of thumb is that you should reinvest 1–3% of value a year in a property, more for older housing stock, which describes most of Brookline. Put more precisely: a building with a thirty-year effective life has to be substantially rebuilt over that period, which is roughly 3.3% of the building's value each year.
Brookline's owners are collectively converting about 31% of that into new assessed value, the rest is maintenance that keeps buildings standing without adding value. Adding $19 million a year of room by 2040 does not require anyone to spend more than that rule already suggests. It requires that share to go from 31% to 39%.
Not all growth counts the same
One caution, because "encourage growth" is not specific enough to be a policy.
When one of Brookline's older apartment buildings is converted to condominiums, its assessed value jumps: in the Town's own records, by a median of about 80%, even without renovation. Assessors value rental property on its rental income and owned property on what comparable units sell for, and both methods are standard. For a new building the gap is smaller, closer to a fifth by the Town Assessor's estimate. Either way it changes how many children a building can house before it stops covering its own costs.
That is a fact about arithmetic, not a recommendation about housing. A $1.2 million condominium and a $430,000 apartment do not house the same families, and "better for the Town's balance sheet" is a different claim from "what Brookline needs." But it does mean that a conversation about growth which doesn't distinguish between kinds of growth cannot reach a reliable answer, in either direction.
The choice is ours to make deliberately
None of this argues that Brookline should grow, or that it shouldn't. It argues that the trade-offs are real, and that making them well takes solid data and a clear structure for weighing them.
The override voters approved in May leaves the town real room through 2040. Whether it lasts depends less on how fast Brookline grows than on a handful of decisions it makes every year anyway: what it pays, what its health plan costs, how staffing follows enrollment, and what it does with the money that frees up when the pension fund is fully funded. Growth, especially renovation, protects that room over the long run.
We get to decide the combination. That is worth doing with the numbers in front of us.
The full reference document behind this piece, every figure, its source, and the places the analysis is uncertain, is available separately. The model and data are open, and corrections are genuinely welcome: if something here is wrong, I would rather know.