Multi-phase rehabilitation will stabilize landmark former mental health institution and position it for future municipal reuse
Gale Associates, Inc. is spearheading a $20.4 million effort to stabilize and preserve the historic Stone Building in Augusta, Maine, a landmark structure that once served as the state’s first mental health institution.
The multi-phase project marks a major step forward in the rehabilitation of the long-vacant granite complex, formerly known as the Augusta Mental Health Institute. Listed on the National Register of Historic Places, the building has remained largely unused since its closure in 2004 and had fallen into significant disrepair.
Originally constructed between 1836 and 1840, with expansions completed from 1848 to 1870, the Stone Building is a prominent example of nineteenth-century institutional design influenced by the Kirkbride Plan, which emphasized natural light, ventilation, and humane treatment environments. The structure features a distinctive blend of architectural styles, including a two-story Greek Revival portico, Romanesque granite additions, slate roofing, and historic wood windows with stained-glass elements.
After nearly two decades of vacancy, the building faced a range of structural and envelope challenges, including a partial roof collapse, displaced exterior walls, deteriorated mortar joints, and widespread window failure. These conditions left the property increasingly vulnerable to water infiltration and loss of historic material.
Gale Associates was retained in 2021 by the Maine Bureau of General Services to assess the structure and develop a comprehensive preservation strategy focused on stabilizing and restoring the building enclosure.
The project has progressed through several key phases. Phase 1 included a full roof replacement, slate repair and in-kind replacement, extensive repointing, and stone restoration, as well as reconstruction of severely deteriorated wall and gable sections. The work required careful coordination to ensure structural stability while preserving the building’s historic granite façade.
Phase 2 focused on hazardous materials abatement and the selective salvage of significant interior woodwork, carried out in collaboration with the Maine Historic Preservation Commission.
Phase 3, currently underway, centers on the restoration of approximately 50 historic wood windows, including original stained-glass units. For windows beyond repair, Gale is working with state preservation officials to design compatible replacements that meet modern energy code requirements while maintaining historic proportions and minimizing long-term maintenance.
The project is funded through $20.4 million in state bonds and is being carried out by Maine-based design and construction teams. Completion is anticipated in March 2027.
Beyond preservation, the effort is aimed at revitalizing the broader Augusta East Campus. The State of Maine plans to renovate the building’s interior for future municipal use, allowing the long-dormant property to once again serve the community.
By combining engineering expertise with historic preservation principles, the Stone Building project highlights how complex rehabilitation efforts can protect culturally significant infrastructure while preparing it for a new and sustainable future.
