Constructed in the late 1920s as home to the State Library, State Museum and State Judiciary, the New Jersey State House Annex now contains legislative offices and committee rooms. After decades of wear, severe water penetration began to disrupt legislative operations and cause deterioration to the building’s historic limestone colonnade façade. The New Jersey Division of Property Management and Construction and the New Jersey Building Authority selected STV to deliver restoration solutions for this National and State Historic Landmark.
What challenges did STV address?
The Annex required an entirely new roof system to protect the 150,000‑square‑foot building from ongoing water infiltration. As a federal and state protected landmark, all repairs needed to meet strict preservation requirements while addressing damage that threatened both building systems and historic architectural elements. Maintaining access for legislative staff during construction added another layer of complexity.
What solutions did STV deliver?
STV performed the initial conditions assessment, developed roof replacement strategies and conducted constructability reviews before providing full construction management and on‑site inspection services. The team oversaw the installation of a new roof system designed to protect historic components, improve long-term performance and prevent future water intrusion, while ensuring preservation compliance.
How does this project benefit the community?
The new roof safeguards one of New Jersey’s most historically significant civic buildings, ensuring the continuity of legislative operations and protecting irreplaceable architectural features for future generations.
Key stats and accolades
- 150,000‑sf historic building
- National and State Historic Landmark
- New roof system designed for long‑term water protection
- Preservation of limestone colonnade and historic features
