An architect, space designer, or design-build firm are best qualified to determine the amount of space required. For general office use, hallway space may be minimized through the use of modular furniture and open concept planning. For small office facilities, 200 square feet per person is usually adequate. For educational occupancies, you’ll want to refer to your state’s education authority for minimum classroom sizes. Beyond the prescribed size of the classroom, generally 25% of additional area should be allocated for ancillary areas such as restrooms, hallways, etc. Since there is no rule of thumb covering every use, consideration should be given to:
• Expecting that the new spaces will require additional toilet rooms and possibly an additional janitor’s closet, all needing to meet the latest ADA requirements.
• Allocating space for adequate egress, hallways, storage areas, I.T. closets, conference rooms, and special use rooms.
Ramtech has an extensive catalog of standard floor plans covering education facilities, general office space, and healthcare applications. While these floor plans might not meet your needs exactly, they’re generally a good starting point to help in designing your building layout.