Mars Wrigley Pulls $17.3M Permit for Fulton Market Office Floors
A Chicago permit issued Nov. 9 lists a $17.3M first-time office build-out for Mars Wrigley on floors 11 to 13 of 400 N. Aberdeen St.
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Chicago issued a permit on Nov. 9, 2026 for a first-time office build-out for Mars Wrigley on floors 11 through 13 of the existing building at 400 N. Aberdeen St. in Fulton Market. The applicant-reported cost is $17.3 million.
Why it matters
A tenant improvement of this size is a leasing signal that does not show up in a sales record. The permit describes a “first-time” build-out, meaning the three floors are being fitted out for this occupant for the first time rather than renovated.
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It is also a fast approval. The permit was self-certified, a track in which the applicant’s architect attests that the plans meet code, and it issued five days after the Nov. 4 application.
The numbers
Reported cost is $17,328,986, spread over three floors, or about $5.8 million per floor. The permit does not list square footage, so we do not state a cost per square foot. Scope covers new partitions, doors and hardware, lighting, finishes, millwork, and mechanical, electrical and plumbing work. Listed contractors include Power Construction Company, Burnham Nationwide and Kelso-Burnett Co. (electrical). The permit fee was $36,335.
The building owner appears on the permit as a property entity; we do not treat it as the sponsor.
What’s next
The permit record does not state a move-in date, headcount or lease terms. Look for a Mars Wrigley announcement and for the lease side of the transaction. Applicant-stated cost can differ from final spend. Related office and permit activity is tracked on the Chicago market page.
ON THE RECORD: City of Chicago building permit 101090181, issued Nov. 9, 2026; cost is applicant-reported, not a lease or sale figure.
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Quick answers
- What is the latest on 400 N Aberdeen St?
- A Chicago permit issued Nov. 9 lists a $17.3M first-time office build-out for Mars Wrigley on floors 11 to 13 of 400 N. Aberdeen St.
- Who is developing 400 N Aberdeen St?
- Power Construction, according to City of Chicago Building Permits.
- What are the key numbers for 400 N Aberdeen St?
- reported cost: $17.3M; floors: 3; days to permit: 5 days.
On the record
Permit 101090181, issued 2026-11-09 (application 2026-11-04, self-certified), lists an applicant-reported cost of $17,328,986 for a first-time office tenant build-out on floors 11 to 13 for Mars Wrigley Confectionery US, LLC within an existing commercial building at 400 N Aberdeen St; Power Construction Company, LLC is among the listed contractors.
Permit · data.cityofchicago.org