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Rehabilitation construction began in October 2026 on Building 107 at Boston’s Charlestown Navy Yard. The National Park Service (NPS) and National Park Foundation marked the start with a public kickoff attended by officials and community stakeholders. The current announced project cost is approximately $50.2 million, funded through the Great American Outdoors Act’s Legacy Restoration Fund. The renovated 61,000-square-foot building is planned to become the consolidated headquarters for the National Parks of Boston, bringing administrative, maintenance, stewardship, interpretation and curatorial teams together while preserving the structure’s historic character.
What is happening with Building 107 at the Charlestown Navy Yard?
The NPS has started rehabilitation work on historic Building 107, a long-closed facility inside the Charlestown Navy Yard. The October 26, 2026 kickoff formally moved the project from planning into construction. The work is intended to adapt the building for contemporary park operations without losing the features that document its naval-industrial past.
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Superintendent Tarona Armstrong described the project as a way to preserve the building’s legacy while creating a modern, sustainable and accessible headquarters. The completed facility is expected to include maintenance shops, offices, educational spaces and meeting rooms.
Why is the National Park Service renovating Building 107?
The renovation will consolidate staff and functions that are currently spread across facilities. Housing administrative, maintenance, stewardship, interpretation and curatorial teams under one roof is intended to improve coordination and operational efficiency for the National Parks of Boston.
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The project also addresses the practical needs of a working federal facility. Planned improvements include upgraded accessibility, sustainability measures and restored historic elements, allowing the building to support park programs while retaining its architectural identity.
What is Building 107’s historical significance?
The U.S. Navy constructed Building 107 in 1904 for the Charlestown Navy Yard’s Public Works Department. That department maintained the yard’s buildings, piers, wharves, dry docks, roads, railways, electrical systems and plumbing.
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Building dimensions and current status
- Configuration: a rectangular brick building with two floors and an attic.
- Approximate size: 340 feet long, 60 feet wide and 50 feet tall.
- Total area: about 61,000 square feet.
- Public access: Building 107 is closed to the public.
How much will the Building 107 renovation cost?
The latest announcement puts the rehabilitation at approximately $50.2 million. Funding comes through the Legacy Restoration Fund established by the Great American Outdoors Act.
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An earlier NPS project page listed an estimated cost of $71 million. That figure was a 2025 planning estimate published before the October 2026 construction kickoff and should not be treated as the current announced cost.
| Figure | What it represents | Status |
|---|---|---|
| Approximately $50.2 million | Renovation cost announced in October 2026 | Current announced project figure |
| $71 million | Earlier NPS planning estimate | Superseded estimate from 2025 |
| 61,000 square feet | Area of the renovated facility | NPS project description |
When will the Building 107 project be finished?
No confirmed completion date appears in the latest October 2026 announcement. An earlier project page anticipated a two-year construction period beginning in 2025, but that schedule was tied to an earlier start assumption and is not a reliable completion promise after the project’s actual 2026 kickoff.
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Readers should therefore treat the work as active construction with the final delivery date still to be announced by the NPS. Project timing can change as rehabilitation proceeds in a historic structure.
Can the public visit Building 107 during construction?
No. Building 107 is identified as closed to the public. That restriction is separate from access to the broader Charlestown Navy Yard, which remains a major Boston historic destination.
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The Navy Yard receives more than 1.5 million visitors annually, according to the NPS’s 2025 information, and is associated with the Freedom Trail. Visitors can experience publicly accessible areas of the Navy Yard, but they should not assume that the construction project opens Building 107 for tours or interior viewing.
A 2025 NPS project description estimated that visitor impacts during construction would be limited. Because that was an estimate made before work began, current visitors should check official park notices for temporary closures, detours or other changes before traveling.
What will Building 107 contain after rehabilitation?
The planned headquarters will combine operational and public-service functions in one facility.
- Maintenance: shops and support areas for caring for park properties.
- Administration: offices for park management and business operations.
- Stewardship and curatorial work: space for collections, preservation and resource management.
- Interpretation and education: educational spaces and meeting rooms for park programs and staff collaboration.
- Modern building performance: sustainability and accessibility upgrades integrated with historic preservation.
How should visitors follow the project?
- Check National Parks of Boston announcements for construction updates and any changes affecting the Charlestown Navy Yard.
- Plan around the publicly accessible Navy Yard rather than Building 107’s interior, which remains closed.
- Use current park guidance for routes, parking and site access because construction conditions can change.
- For deeper historical context, consult specialist works such as Frederick R. Black’s Charlestown Navy Yard: 1890-1973, Volume 1-2 or the 2023 Building 107, Boston National Historical Park, Historic Structure Report by Virginia H. Adams, Gretchen Pineo and Kathryn Whitehill.
What does the project mean for the Charlestown Navy Yard?
Building 107’s rehabilitation preserves a surviving piece of the Navy Yard’s working infrastructure while giving the NPS a purpose-built base for managing Boston’s national park resources. The project links preservation with day-to-day operations: the building’s Public Works history will remain legible, but its renewed systems and accessible spaces will support the park for future decades.
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Frequently Asked Questions
Is Building 107 a National Historic Landmark?
Yes. Building 107 is a National Historic Landmark within the Boston Naval Shipyard and is also part of the Boston National Historical Park National Register District. Its landmark status is why rehabilitation must balance new building systems and accessibility with preservation of historic character.
Who owns or manages Building 107 now?
The National Park Service became steward of Building 107 after the Charlestown Navy Yard closed in 1974. The building has since supported maintenance, offices, museum functions and archive collections.
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The announced scope describes a headquarters with maintenance shops, offices, educational spaces and meeting rooms. It does not identify Building 107 as a new public visitor center, and the building remains closed to the public.
Why was the project previously listed at $71 million?
The $71 million amount came from an earlier NPS project page published as a planning estimate before the October 2026 kickoff. The latest announcement gives approximately $50.2 million as the current announced renovation cost.
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