400 E Diehl Rd
Naperville, IL 60563
Naperville Financial Center · Office Property For Sale

Marcus & Millichap, as exclusive advisor, is pleased to offer qualified investors the opportunity to acquire Naperville Financial Center, a five-story, 57,967 SF multi-tenant suburban office building at 400 East Diehl Road in Naperville, Illinois.
Strategically located just south of I-88 at the southeast corner of East Diehl Road and North Washington Street, the building sits along the premier Diehl Road corridor — the backbone of Naperville’s office market within the I-88 technology corridor. It offers excellent regional connectivity, approximately one mile from Interstate 88 and 30 miles west of downtown Chicago, in a dense live-work-play area surrounded by national retailers (including Costco and Target), dining, and fitness amenities.
Recently renovated in 2019 in the common areas, lobby, and conference facilities, the property is currently 92% leased with a diversified tenant base (no tenant exceeds 12.9% of the building). It presents a clear value-add opportunity through lease-up of the remaining 4,660 SF vacancy. Upon stabilization, NOI is projected to increase by approximately $131,000, delivering a pro forma cap rate of 10.50% and a cash-on-cash return of 14.7%.
Naperville Financial Center features a highly diversified and stable tenant roster spanning 21 occupied suites. The tenancy is well-balanced across professional services with uses including legal, financial advisory, wealth management, family offices, professional consulting, behavioral health, and specialized service tenants. Importantly, no single tenant exceeds 12.9% of the building’s rentable square footage, and approximately 60% of GLA is secured under leases signed in 2023 or later. This granular, recession-resistant mix provides excellent cash-flow stability and materially reduces concentration risk for investors.
The modern, tenant-centric design includes plug-and-play suites, private offices, collaboration areas, kitchens, and balconies, supporting efficient occupancy with minimal downtime. The property features surface level and covered parking (3.56 spaces per 1,000 SF), on-site storage, a dramatic two-story atrium lobby, and a tenant lounge with free Wi-Fi.
Surrounded by a dense concentration of high-performing national retailers — including Costco Wholesale and Target — as well as a robust mix of dining, fitness, and service-oriented amenities, the Property is embedded within a highly desirable live-work-play environment that continues to attract both tenants and employees.
With its institutional-quality location, strong occupancy, and clear path to further income growth, Naperville Financial Center benefits from institutionally minded ownership and is poised to continue its upward trajectory for investors seeking stability, calculable returns, and upside supported by a diverse well-heeled tenant roster. This Naperville landmark provides certainty and history of strength in a steady, predictable location and presents investors with a rare opportunity to acquire a highly amenitized, institutionally located office asset within one of the most affluent and sought-after suburban submarkets in the greater Chicago MSA.
The Property is being offered free and clear of debt at 9% cap rate totaling $8,763,934.