Northwestern Medicine has shelled out $58 million for a four-story medical office building in Oak Brook, upgrading its role from tenant to landlord in a move that could reshape how it controls outpatient care in the western suburbs. The deal is part of a growing wave of suburban plays where big health systems decide they would rather own the clinics where their doctors practice than keep cutting rent checks.
An affiliate of Northwestern bought the roughly 70,000-square-foot building at 1001 Commerce Drive for $58 million, according to DuPage County records, as reported by CoStar News. The seller was a joint venture of developers Harrison Street and MedProperties Group, which built the property and then brought it to market.
Northwestern Medicine describes the site as an 80,000-square-foot Outpatient Center that opened in January 2024 and now houses immediate, primary, and specialty care, along with diagnostic imaging and infusion services, according to a Northwestern Medicine press release. Since opening, the health system has folded several suburban practices into the Oak Brook location, aiming to centralize services for patients who live west of the city.
County records and reporting show the developers bought the land in June 2021 for about $4.2 million and later took out an approximately $36.9 million loan from Lake Forest Bank & Trust in December 2021, according to CoStar News. Harrison Street and MedProperties had pitched the project as a modern suburban medical campus before ultimately selling it to its own tenant.
Why are systems buying outpatient space
Health systems are increasingly on the hunt for suburban outpatient buildings they can own outright, rather than renting long term. Last month an Advocate Health subsidiary paid more than $23 million for a converted LA Fitness in Naperville, as reported by vacant Naperville LA Fitness, and state permitting documents filed with the Illinois Health Facilities and Services Review Board list a permit amount of $52,208,999 for that Advocate project. Buying finished outpatient properties or converting empty retail space lets hospital systems control scheduling, tailor specialty suites and keep tighter hold on the revenue that flows through those clinics.
What it means locally
For Oak Brook and nearby suburbs, Northwestern’s purchase means more services run directly by a major health system in a single, familiar spot, which can simplify referrals, imaging appointments and follow-ups for patients. For developers and investors, the deal is another signal that demand is still strong for purpose-built medical space and big-box retail conversions as health systems chase capacity, convenience and control in high-traffic suburban corridors.
