1265 Main Medical Office Building Delivers New Orthopedic Hub in Waltham

Blue Hawk Investments, Machado Silvetti, Altair Construction, Building Envelope Systems, and H+O Structural Engineering have delivered the new 1265 Main Medical Office Building (MOB) in Waltham, Massachusetts. The three-story, 210,000 SF composite steel facility, supported by three levels of below-grade parking, is part of the 94-acre 1265 Main campus (formerly Polaroid headquarters), transformed into a mixed-use campus along Route 128.

Shot 21 — Photos courtesy of Altair Construction.

A Regional Destination for Orthopedic Care

Construction is complete, and the building is entering full operation as tenants complete final fit-outs. Boston Orthopedic & Spine and Boston Bone & Joint Institute have opened new clinics on the upper floors, while Boston Out-Patient Surgical Suites prepares to open its expanded ambulatory surgery center following final licensing.

Together, these programs introduce eight operating rooms, imaging suites, recovery spaces, and walk-in clinics, forming one of Greater Boston’s most advanced outpatient orthopedic facilities.

Shot 29 — Photos courtesy of Altair Construction

"It was $500,000 saved on a $24M project. That is real money, right?"
- Dave Traggorth, Causeway Development

Structure and Design

Machado Silvetti’s design emphasizes daylight, access, and recovery, with two roof terraces extending patient and staff wellness spaces outdoors. H+O designed the composite steel frame to meet strict vibration and span requirements for surgical precision while maintaining open, adaptable floorplates for tenant fit-outs.

Three levels of below-grade parking connect directly to medical floors, while early coordination among Altair Construction, Building Envelope Systems, and the design team kept the structure, enclosure, and MEP systems aligned from foundation to completion.

71 Border Road DBI d98dae93 DJI 0252 — Photos courtesy of Altair Construction.

Built for What’s Next

1265 Main MOB reflects the kind of collaboration defining our work: structural systems aligned with program needs, budgets grounded in data, and design intent carried through construction. For developers and architects, it’s a model of how disciplined structure creates measurable certainty across every project type.

At H+O Structural Engineering, we integrate cost intelligence into every stage of design.
By quantifying structure cost early, we help project teams make data-driven decisions to balance performance, constructability, and value. The result? Predictable delivery across healthcare, multifamily, and mixed-use developments.