Interplan LLC

Interplan LLC is a full-service architectural firm in Lombard, Illinois, specializing in design, engineering, and permitting for restaurant and retail clients across all 50 states. The firm serves corporate brands, franchise operators, and multi-site developers with expertise in corporate retail, corporate restaurant, franchise restaurant, and specialty retail projects. With over five decades of experience, Interplan delivers empathy-driven, quality-controlled solutions that prioritize clarity, consistency, and buildability. Their services include architecture, MEP and civil engineering, interior design, ADA compliance, and project management, all managed in-house to ensure seamless coordination. The firm maintains a 5.00 rating based on client feedback, reflecting a strong reputation for reliability and client satisfaction.

Interplan was founded in 1972 in Lemont, Illinois, and has since evolved into a nationally recognized leader in restaurant and retail architecture. The firm’s in-house model integrates architecture, engineering, and permitting under one roof, enabling faster project delivery, improved communication, and consistent results across diverse markets. This single-source approach allows for greater foresight and problem-solving, rooted in decades of experience adapting to shifting industry demands. The team includes licensed professionals across multiple disciplines, with over 75,000 permits approved and more than 50,000 projects completed since its founding. Interplan emphasizes a collaborative, values-driven process that translates brand vision into functional, scalable spaces.

Located at 1 East 22nd Street, Suite 400 in Lombard, the firm sits just a short drive from the Lombard Fire Department and Green Brook, a government office located about 0.1 miles away. It is also within walking distance of Four Seasons Park and nearby schools including Glenn Westlake Middle School and Christ the King School, all approximately 0.6 miles away. The office lies along South Highland Avenue, a key local road connecting residential and commercial areas.

Interplan is recognized for its deep expertise, nationwide licensing, and consistent project execution. The firm’s well-documented presence online, combined with a clean, search-optimized website, reflects its professional standing and commitment to transparency. Clients benefit from a proven track record of supporting national brand rollouts with local precision.

In Lombard, Interplan stands as a trusted partner for businesses expanding across the Midwest, combining decades of innovation with a focus on human-centered design.