BUILDING YOUR OFFICETenants' Rules of Thumb The general rule of thumb is to allow 175 to 250 usable square feet per person depending upon the type and style of the business. This figure can vary based upon special needs such as extra-large conference rooms or storage requirements, but will include normal amenities within a general use office. For an accurate determination of space requirements, an office space planner should be consulted. The following standards can be used to help estimate the amount of usable space required for your business. Typical President' s office or Chairman of the Board 250 to 400 sq. ft. (4 to 5 windows in length) Typical Vice-President' s Office 150 to 250 sq. ft. (3 to 4 windows in length) Typical Executive' s Office 100 to 150 sq. ft. (2 widows in length) Partitioned Open Space Clerical Supervisor or Manager 80 to 110 sq. ft. Open Space Clerical or Secretary 60 to 110 sq. ft. Conference Rooms 15 sq. ft. per person: theater style 25 to 30 sq. ft. per person: conference seating Mail Room 8 to 9 ft. wide with 30" counters on either side. Length depends upon amount of usage Reception Area 125 to 200 sq. ft. Receptionist and 2 - 4 people 200 to 300 sq. ft. Receptionist and 6 - 8 people File Room 7 sq. ft. per file with a 3' to 4' aisle width Library Allow 12" for bookshelf width 175 to 450 sq. ft. with seating for 4 - 6 Lunch Rooms 15 sq. ft. per person, not including kitchen. Kitchen should be 1/3 to 1/2 of seating area Clerical Pool Areas 80 to 100 sq. ft. per person Corridors 20% to 30% of the total usable area Coat Closets 1 lineal ft. for 4 coats 3 per person Water Coolers/Drinking Fountains 1 unit per 75 employees Suggested Column Spacing 28' to 30' per bay Suggested Window Mullion Spacing 4'6" to 5'. This determines office width |

