Useful capacity depends on the floor plan, furniture, circulation, meetings, storage, restroom space and applicable occupancy requirements, not square footage alone.
Count work activities before desks
List private offices, open workstations, plan tables, meetings, break space, storage and visitors. A smaller team with large drawings or equipment may require more room than a larger administrative group.
Compare the same office and site scope.
Give every supplier the real ZIP, use, size range, term, delivery date and setup responsibilities.
Protect circulation and access
Door clearances, aisles, accessible routes and emergency movement must remain usable after furniture arrives. Test the proposed floor plan with actual desk and cabinet dimensions.
Give suppliers a peak headcount
Share normal staff, maximum simultaneous users and anticipated growth in the mobile office quote request. Suppliers can then compare layouts instead of recommending size from headcount alone.
Turn this answer into a useful supplier comparison
Record the decision that applies to the property, who owns it and when it must be complete. Connect that note to the proposed unit, delivery plan, access equipment, utilities, service and removal so an unanswered assumption does not return later as a change in price or schedule.