Independence Square Improvement Project

Independence Square

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Project Overview

The Independence Square Improvement Project (ISIP) at Independence National Historical Park will rehabilitate and preserve key historic structures and features on Independence Square. The buildings undergoing improvement include:

• Independence Hall
• Congress Hall
• Old City Hall

These iconic landmarks collectively attract around three million visitors every year.

In March 2025, the National Park Service (NPS) initiated the project. The work is being carried out with the help from skilled NPS maintenance assistance teams from the Historic Preservation Training Center and the Historic Architecture, Conservation & Engineering Center.

Damaged wood and peeling paint on a historic building.

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Key tasks of the ISIP include:

• Designing and constructing accessible ramps
• Masonry and monument restoration
• Restoring interior and exterior wood elements
• Repairing interior plaster work
• Preserving metal finishes
• Applying historically accurate paint finishes to the ceilings, walls, and trim

These efforts will enhance the park's infrastructure, improve accessibility, and preserve the historic fabric of the site, ensuring that Independence Hall—where the Declaration of Independence and the US Constitution were debated and signed—remains a UNESCO World Heritage Site and a symbol of American freedom.

Timeline

The project will be completed by the 250th anniversary of the signing of the Declaration of Independence in July 2026.

Frequently Asked Questions

Will construction impact my visit to Independence National Historical Park?

Maybe. Temporary and intermittent closures will occur in specific areas of Independence Hall, Congress Hall, and Old City Hall during construction. The goal is to maintain minimal disruption to visitor access. Visitors are encouraged to check the park's website for updates on specific closures. 

What measures are in place to preserve the historic integrity of the buildings?

All work adheres to the Secretary of the Interior's Standards for Historic Preservation and NPS Cultural Resource Management Guidelines. NPS employees from the maintenance assistance teams are skilled preservation specialists that include historic architects and conservators. Comprehensive documentation, including Historic Structure Treatment Reports, will record all treatments and materials used.

How is the NPS ensuring accessibility improvements while maintaining the historic character?

Accessible ramp designs are developed in consultation with park staff and historic architects to meet accessibility requirements while minimizing impact on the historic fabric. Temporary ramps will be installed during construction to ensure continued access, and all designs comply with federal policy to preserve the original aesthetic and structural integrity.

What steps are being taken to ensure safety during construction?

The NPS is implementing a robust safety plan, compliant with OSHA regulations, to protect workers and visitors. Construction fencing and signage will protect visitors, and rooms with lead-containing finishes will be isolated during plaster and paint work to ensure public safety.