The deal and zoning facts in this post come from August 2026 reporting, and the rent figures are current as of September 9, 2026. Recheck the market numbers around December 2026. The zoning picture should hold into 2027 unless the council acts again.
BXP, one of the largest office landlords in the country, spent $30 million in late August on two more office buildings on Winter Street in Waltham. The purchases came weeks after the City Council overrode a mayoral veto and finalized zoning that allows up to 2,000 apartments on three of the city's office parks.
Here is what BXP bought, what Waltham actually approved, and what both mean if you own, rent out, or plan to buy property in Waltham.
- BXP paid a combined $30 million for the office buildings at 860 and 870 Winter Street in Waltham, in purchases Banker and Tradesman reported on August 27, 2026.
- Waltham's City Council voted on August 3, 2026 to override Mayor Jeannette McCarthy's veto, 12 to 1 on the Bay Colony Corporate Center and 13 to 0 on the Waltham-Weston Corporate Center and 1265 Main Street, finalizing overlay districts that together allow up to 2,000 new homes, per Banker and Tradesman's August 5, 2026 report.
- As of September 9, 2026, the average Waltham one bedroom rents for $2,200, down 11 percent year over year, while the average two bedroom rents for $3,257, up 5 percent, per Zumper.
What did BXP actually buy on Winter Street?
BXP bought the office buildings at 860 and 870 Winter Street, paying $17 million for 860 and $13 million for 870, on the same corridor as the Bay Colony campus it already controls.
These are not trophy assets. 870 Winter Street served as Raytheon's corporate headquarters from 2003 until 2022, then sat as a reminder of what happens when a suburban office anchor leaves. 860 Winter Street last traded in 1999, when the Massachusetts Medical Society bought it for $3.8 million.
BXP just paid four and a half times that 1999 price, in a year when suburban office values are supposed to be on the floor. Nobody does that for the buildings. BXP paid for what the land under them can become, and the company has said it plans up to 2,000 apartments across its three new Waltham overlay districts.
What did Waltham approve in August?
On August 3, 2026, Waltham's City Council overrode Mayor Jeannette McCarthy's veto and finalized three overlay districts that allow up to 2,000 apartments on office park land, the biggest housing change the city has adopted in decades.
The three districts cover the Bay Colony Corporate Center off Winter Street, the Waltham-Weston Corporate Center, and 1265 Main Street, the former Polaroid campus. The override passed 12 to 1 on Bay Colony and 13 to 0 on the other two sites. Roughly 1,500 of the 2,000 units are proposed for the Waltham-Weston Corporate Center alone.
McCarthy had vetoed the Bay Colony piece specifically, arguing the site sits too far from transit, lacks parking, and runs too close to existing homes. The council's answer was fiscal. Commercial values along Route 128 have been sliding, and when office buildings stop carrying their share of the levy, residential taxpayers pick up the difference.
Waltham got here through its own overlay districts rather than through the MBTA Communities Act, but the pressure behind both is identical: office and lab value falling while housing demand refuses to budge. Our MBTA 3A zoning hub tracks that same wave town by town across Newton, Arlington, Belmont, and the rest of the region.
What does institutional buying mean for Waltham property owners?
When one of the country's largest office landlords spends $30 million right after a rezoning, it is telling you the entitlements are now worth more than the buildings sitting on them.
That matters well beyond the three office parks. Assessors, lenders, and buyers all reprice land off comparable sales, and a $30 million institutional purchase tied to residential conversion resets what land along the Route 128 corridor is worth. If you own commercial or multifamily property near Winter Street, Totten Pond Road, or lower Main Street, your parcel's ceiling just moved.
The arc at 1265 Main Street says it plainly. That campus made Polaroid film, then hosted offices and labs, and is now zoned for housing because housing is the use Waltham cannot get enough of. This is the same math we run on Greater Boston multifamily deals every week: the dirt, not the structure, is where the value hides.
If you have owned a two-family or a small commercial building in Waltham for twenty years, this is your signal to find out what the land under it is worth before someone with a spreadsheet tells you first.
What would 2,000 apartments mean for Waltham landlords and renters?
Nothing changes for Waltham landlords this year, because not one of the 2,000 units is permitted yet, but the supply pipeline just went from talk to capital actually deployed.
The rent data above shows a market already splitting. One bedroom rents are down 11 percent year over year while two bedrooms are up 5 percent, which means the small unit end is soft even before any new supply lands. Large lease-ups hit that end hardest, because new buildings skew toward studios and one bedrooms and offer concessions until they fill.
The playbook for owners is not complicated. Renew your good tenants early instead of testing the market every September. Price to this fall's comps, not last year's. And keep condition tight, because every new Class A unit that delivers raises what a renter expects $2,200 to buy. Our leasing and tenant placement team runs exactly that playbook across Waltham, Watertown, and Newton.
For renters, the honest read is patience. The first office park units are years away, but when they arrive in volume, lease-up concessions and real choice arrive with them.
What should you watch next?
The next real signals are site plan filings for the three overlay districts and any permit or demolition activity at 860 and 870 Winter Street. Paper zoning became a $30 million bet in three weeks. Filings are how the bet becomes buildings.
Watch two more things: whether other office owners along Route 128 follow BXP's lead and buy toward the overlays, and how Waltham's annual tax classification votes shift as commercial values reset. Both will tell you how fast the rest of the city reprices.
Frequently asked questions
Where are Waltham's three new housing overlay districts?
The three districts cover the Bay Colony Corporate Center off Winter Street, the Waltham-Weston Corporate Center, and 1265 Main Street, the former Polaroid campus.
How many apartments can be built under Waltham's office park rezoning?
The overlay zoning adopted in August 2026 allows up to 2,000 housing units across the three districts combined, with roughly 1,500 of them proposed for the Waltham-Weston Corporate Center.
When will the first office park apartments open in Waltham?
No construction timeline has been announced, and BXP still has to file site plans and pull permits, so first occupancy in Waltham's office park districts is realistically several years out.
What did BXP pay for 860 and 870 Winter Street in Waltham?
BXP paid $17 million for 860 Winter Street and $13 million for 870 Winter Street, a combined $30 million, in purchases reported in late August 2026.
Are Waltham rents rising or falling right now?
As of September 9, 2026, the average Waltham one bedroom rents for $2,200, down 11 percent from a year earlier, while the average two bedroom rents for $3,257, up 5 percent.
Does the rezoning change what I can build on a residential lot in Waltham?
No. The August 2026 overlay districts cover the three office park sites only, and residential zoning across the rest of Waltham is unchanged by the vote.
If you own in Waltham, find out what the new zoning map means for your block before an offer arrives that already priced it in. PH Realty Group leases, manages, and sells across Waltham, Watertown, and Newton, and we watch this market so you do not have to. Reach out and we will give you the straight read on your property.
