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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.
Clerical or Secretary 60 to 110 sq. ft.
15 sq. ft. per person: theater style
25 to 30 sq. ft. per person: conference seating
8 to 9 ft. wide with 30" counters on either side. Length depends upon amount of usage
125 to 200 sq. ft. Receptionist and 2 - 4 people
200 to 300 sq. ft. Receptionist and 6 - 8 people
7 sq. ft. per file with a 3' to 4' aisle width
Allow 12" for bookshelf width
175 to 450 sq. ft. with seating for 4 - 6
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
20% to 30% of the total usable area
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