Worcester Office Conversion: MA’s Largest Project

The biggest office-to-residential conversion now underway in Massachusetts is not in Boston. It is in downtown Worcester, where the former Fallon Health headquarters at 10 Chestnut Street is being transformed into 198 market-rate apartments in a project that says as much about the state of secondary-city downtowns as it does about one building.

Now branded One Chestnut Place, the 11-story property is being redeveloped by Synergy Investments into a Class A residential community with studios, one-bedroom units, and two-bedroom units. The project includes 72 studios, 85 one-bedrooms, and 41 two-bedrooms, along with a fitness center, heated pool, rooftop deck, outdoor patio, and underground parking. Construction began in 2025 and is expected to wrap in 2026, with some reports pointing to August and others to year-end.

It’s the largest office-to-residential conversion in Massachusetts to date. That matters because it pushes the conversion story beyond the usual gateway-city narrative. For years, the assumption was that these projects would only work in places with exceptionally high rents or condo values. Worcester suggests something else is happening. In the right downtown, a lower office basis, public support, and a believable housing story can be enough to move a major conversion forward.

The capital stack tells that story clearly. Washington Trust led a $51.17 million financing package, including a $47.57 million loan, while MassDevelopment provided a $3.6 million HDIP bridge loan. The project also received state support and a 15-year tax break from the city. Even for a well-located downtown tower, private debt alone was not enough. The conversion came together through a layered public-private structure that reduced risk and helped close the gap between acquisition cost and residential redevelopment economics.

That is becoming a familiar pattern in office conversions that actually get built. The challenge is rarely just whether a building can be physically converted. It is whether the asset can be acquired cheaply enough, financed creatively enough, and repositioned into a product the local market can absorb. Synergy bought the property in 2023 for $10.5 million, at a moment when Fallon Health was preparing to move out and the office market was already repricing buildings downward. That gave the developer something increasingly essential in adaptive reuse: room in the basis.

The project also reflects a broader change in what downtown office buildings are for. Once Fallon left for One Mercantile Street, the building’s future no longer depended on finding another large office user willing to backfill the space. Instead, the economics pointed toward housing. In that sense, One Chestnut Place is less a rescue of a struggling office asset than a reallocation of downtown real estate toward the use class with stronger long-term demand.

There is also a district-level play here. The tower conversion is the centerpiece, but it is not the whole story. Synergy has also been involved in developing 22 affordable units nearby as part of the broader Chestnut Place redevelopment. That gives the project more urban significance than a standalone luxury conversion. The goal is not just to refill a vacant office building, but to continue reshaping part of downtown Worcester into a more residential, mixed-use neighborhood.

For Worcester, that is a meaningful shift. Secondary downtowns across the Northeast are facing a version of the same problem: too much aging office space, not enough housing, and a post-pandemic demand picture that makes waiting for a full office recovery harder to justify. One Chestnut Place offers one answer. It shows that large office conversions do not need to be confined to Manhattan or downtown Boston to make sense. They need a building with enough locational value, a sponsor willing to take on complexity, and a public sector willing to treat housing creation as downtown economic strategy.

That may be the real significance of this project. The next wave of office conversions may not be defined by trophy towers in the biggest cities. It may be defined by former corporate buildings in smaller downtowns where values have reset enough, policy has become more flexible, and the need for housing has become too urgent to ignore. Worcester is showing what that version of the conversion story looks like at full scale.