Brookline's median condo was assessed at $839,600 for fiscal 2026. An owner who lives in that unit pays about $4,963 a year in property tax. An owner who rents it out pays about $8,598. It's the same unit with the same assessment, and the two bills differ by roughly $3,635 a year.
The difference comes from Brookline's residential exemption. It's the main reason the tax line on a Brookline listing tells a buyer about the seller, not about the buyer's own future costs. Whether you'll pay the lower bill, and starting when, depends on a date on the calendar. The listing doesn't show it.
The two bills, side by side
For fiscal 2026, the Select Board set the residential rate at $10.24 per $1,000 of assessed value. It also kept the residential exemption at 20%, as recent boards have done. In practice, an eligible owner-occupant has $354,974 taken off the assessed value before the rate is applied. That figure is 20% of the town's average residential value of $1,774,868.
The Town's own tables show what that does to median properties:
| FY2026 median property | Assessed value | Taxable value with exemption | Bill with exemption | Bill without exemption |
|---|---|---|---|---|
| Condo | $839,600 | $484,626 | $4,962.57 | $8,597.50 |
| Single-family | $2,396,400 | $2,041,426 | $20,904.20 | about $24,539 |
The single-family figure without the exemption is the full assessment multiplied by the $10.24 rate. Some press coverage described the median condo as "valued at" $484,626. That number is the taxable value after the exemption. The assessed value is $839,600.
The exemption is a fixed dollar deduction, so it's worth the same to every eligible owner: $354,974 times $10.24, or about $3,635 for fiscal 2026. Since the dollar amount is fixed, it makes up a bigger share of the bill the cheaper the home. The median single-family owner saves about 15%. The median condo owner saves about 42%.
For a unit assessed at $500,000, the Town's table shows a full-rate bill of $5,120. With the exemption, that owner would be taxed on about $145,000 of value and pay roughly $1,485. Lower-priced units still change hands in Brookline. The Warren Group recorded a sale at 1253 Beacon St. #C3 for $358,000 on August 4, 2026. Sale prices and assessments aren't the same number. Still, at that end of the market, the exemption can account for most of the annual tax.
The January 1 test, applied to a fall 2026 purchase
Brookline grants the exemption on one property per owner: the principal residence the owner uses for federal and state income tax purposes. You must occupy it on January 1 before the fiscal year you're applying for, and Brookline's fiscal year runs July 1 to June 30. Tax bills go to the owner of record as of the assessment date, and ownership changes after that date show up in the next fiscal year's bills.
For someone buying a Brookline condo to live in this October, the calendar looks like this:
- Fiscal 2027, running through June 30, 2027. The bills were set based on ownership and occupancy as of January 1, 2026. The FY2027 questionnaire asks exactly that question. Those bills reflect the seller's situation, whatever it was.
- January 1, 2027. You need to own the unit and live in it as your principal residence on this date to qualify for the next fiscal year.
- Filing. Brookline's form is due April 1 or three months after the actual tax bill is mailed, whichever is later.
- Fiscal 2028, beginning July 1, 2027. This is the first year the exemption can be yours.
Town guidance says the July and October bills are preliminary, and the third-quarter bill, issued January 1, reflects the new valuation. In practice, a fall buyer reviewing a listing is looking at a bill built from a past owner's facts and a past assessment.
That's why the seller matters. If the seller lived in the unit, the current-year bill carries their exemption. Brookline's questionnaire specifically covers owners who "inherited a residential exemption from the previous owner." It requires them to file to keep receiving it, so the break doesn't continue automatically after the sale. If the seller rented the unit out, the listing shows a full-rate bill. That overstates what an owner-occupant would pay after qualifying, possibly by thousands of dollars a year.
The questionnaire also asks whether the property is held in a trust. If it is, you must attach the trust declaration and a schedule of all beneficiaries. It also asks about voter registration, the Town Clerk's census, and vehicle registration at the address. Buyers taking title through a trust should expect that paperwork.
How much of Brookline gets the break
For fiscal 2025, 9,799 of Brookline's 17,286 residential parcels were eligible for the exemption, or about 57%. The other parcels, roughly two in five, pay the full rate. State law treats each condominium unit as its own parcel. So a building can contain owner-occupied and rented units that pay very different amounts for similar space.
For a small investor, the gap shows up directly in the numbers. A landlord buying the median-assessed condo should budget the $8,597.50 figure, not the $4,962.57 one. A buyer who plans to live in a unit for a few years and then rent it out should expect the bill to move to the full rate once it's no longer their principal residence on January 1.
The override widens the spread
On May 5, 2026, Brookline voters approved a $23,254,439 override, 8,859 to 5,826. The Town estimates it adds about $0.30 per $1,000 to the residential rate.
The added rate applies to taxable value, so it costs owner-occupants less than other owners. The Town projects that the override adds $145.39 to the median condo's FY2027 bill with the exemption and $251.88 without it. The median single-family home with the exemption goes up $612.43. Over three years, the Town projects the median condo bill rising $2,296 from FY2026 to FY2029 with the override, compared with $1,441 if it had failed. For single-family homes, the projection is $3,924 compared with $2,463. Brookline.News summarized the result as taxes rising about 18% over three years instead of 11%.
These are Town projections, not final bills. The Town says its calculator estimates only the override's effect. Actual FY2027 amounts will depend on new assessments, the standard Proposition 2½ increase, and debt-exclusion borrowing costs. As of early October 2026, we haven't found a published FY2027 rate or exemption amount.
Who covers the cost of the exemption
The exemption doesn't shrink the town's levy. It moves part of the levy onto other property owners. The Town Administrator has described a break-even value. Owner-occupants below it come out ahead under the exemption, and those above it pay more to cover its cost. Non-owner-occupied property gets no deduction at all, so it carries more of that load.
The Select Board revisits the exemption every year. At the November 2025 hearing, member John VanScoyoc said residents had asked him about raising it, and added:
"The formula that we use is not very kind to the homeowners at the upper range of the values of the properties, regardless of their income."
Chief Assessor Ted Costigan said a larger exemption would soften increases for single-family homes and condos but raise them for apartment buildings. The FY2026 presentation modeled what other percentages would mean. At 25%, the median condo's bill would have been $4,181. At 10%, it would have been $6,383. The board kept 20%. Because this is a policy choice made each fall, the value of the exemption to a condo owner, and its cost to everyone else, can change from year to year.
Questions buyers raise about the exemption
Can I claim the exemption on a Brookline condo and on another home? Brookline grants it on one property, the principal residence used for income tax reporting. The FY2027 questionnaire asks applicants to list other residential real estate they own and any exemption claimed in another city or town.
If I close in December and move in right away, does it count? Eligibility depends on owning and occupying the unit on January 1 before the fiscal year. A buyer who owns and lives in the unit on January 1, 2027 would be applying for the fiscal year that starts July 1, 2027. For questions about a specific property, contact the Brookline Assessors at 617-730-2060.
Is this tax advice? No. This post explains how Brookline's published rules and figures work. For your own situation, check with the Assessors' office and your tax advisor.
If you're comparing Brookline condos and want to know what a specific unit will actually cost to own, the seller's tax status and the January 1 timing are the first two things to check. Prime Realty can go through both for any unit on your list, whether you plan to live in it or rent it out. Schedule a free market consultation.
