Butterworth Hall, located at 1265 Asylum Avenue, Hartford, Connecticut, is a distinctive 23,925 SF historic mansion set on 6.11 private acres in Hartford's prestigious West End. Originally part of the Hartford College for Women campus and most recently home to the Montessori Training Center, this landmark property offers a rare lease opportunity combining historic character, scale, and flexibility. The building features approximately 36 rooms, gas heat, and classic architectural details that reflect its historic significance, providing an inspiring environment well-suited for mission-driven and institutional users. Ideal uses include educational or non-profit organizations, corporate headquarters, training or conference centers, and social service organizations, among other compatible professional or institutional uses. Butterworth Hall is centrally located with convenient access to Interstate 84 and is approximately 2 miles from West Hartford Center, offering strong regional connectivity while maintaining a private, campus-like setting. The ownership is open to build-to-suit renovations, allowing customization to meet the operational and programmatic needs of a new tenant. The property is offered at a lease of $10.00 PSF NNN (Triple Net). Please note that real estate taxes, utilities, and common area maintenance (CAM) charges are allocated on a proportional basis across the combined campus buildings. Butterworth Hall represents a unique and irreplaceable