Office supply in Warrenville is concentrated at one address on Winfield Road, which carries all 10 of the units listed for the city. The smallest is 5 m² (about 54 sq ft), the largest 90 m² (roughly 970 sq ft), and the median lands at 38 m² — room for around six workstations plus a small meeting corner.
Warrenville sits in DuPage County on the east-west tollway corridor, and this is a drive-to office market: with 10 suites at a single business-park address, the filters that matter are parking ratio, interstate access and the amenities inside the building, not walking distance to a station. Anyone weighing Warrenville is comparing those factors against the 38 m² median suite rather than against another neighbourhood.
Ten units at one Warrenville address is thin supply, and the size ladder has gaps — the jump from the 5 m² starter room to the 90 m² suite is a single step with only the 38 m² middle in between. Companies planning to grow past six desks in Warrenville should agree lease flexibility and the landlord's willingness to combine adjoining units up front, because the next size may simply not be vacant at the moment it is needed.