The space you start with decides most of a restaurant buildout budget. Here is why second-generation restaurant space costs far less than a conversion, and the Chicago-specific items to plan for.
When restaurant operators compare spaces, they usually compare rent. The bigger number is often the buildout, and the biggest factor in the buildout is what the space was before you got it.
Starting condition drives the budget
National survey data makes the point clearly. In one survey of restaurant operators, taking over a former restaurant ran a median of about $73 per square foot, while converting a space that had never been a restaurant ran about $146 per square foot, roughly double.
The reason is the infrastructure. A second-generation restaurant may already have a grease interceptor, a hood and exhaust path, gas service, adequate electrical capacity, floor drains, and restrooms sized for the seating. A conversion has to add all of it, and some of it, like a new exhaust path through an existing building, can be the hardest part of the project.
What a second-generation space can save you
- An existing hood, duct, and roof penetration that can be reused or upsized
- A grease interceptor already sized and connected
- Gas service and electrical capacity close to what you need
- Restrooms and an accessible entrance already in place
- A health department history for the space, which helps planning
Check every one of them. Equipment left behind may not meet current code, and a hood sized for a café will not serve a full cooking line.
Chicago items to plan for
- Kitchen exhaust. Grease-producing cooking needs a hood with fire suppression, and a duct route to the outside that meets code. The mechanical permit and inspection are part of the schedule.
- Grease interceptor. Food service needs grease handling sized for your menu and volume.
- Health department review. The Chicago Department of Public Health reviews food establishments and inspects before opening.
- Accessibility. Restrooms, the entrance, and seating need to meet accessibility requirements, which can trigger more work in older buildings.
- Licensing. Your business license and any liquor license run on their own timelines. Start them early.
Where operators overspend
The most common budget surprises are an exhaust route that needs to go further than expected, electrical service that has to be upgraded for the kitchen equipment, and restrooms that must be rebuilt to meet accessibility requirements once the work is permitted.
Before you sign
Walk the space with your kitchen designer and a builder before you commit. Bring the equipment list. A one-hour walkthrough can tell you whether a space is a straightforward second-generation buildout or a conversion priced like new construction. See how we approach restaurant and hospitality construction.
About Field Notes
Field Notes is published by 32 Build, a licensed, bonded & insured Chicago general contractor working in residential renovation, gut rehabs, multifamily repositioning, and commercial construction. Every article is written or reviewed by our field team based on actual project experience — not national averages or general advice.
If you have a project in mind after reading, we offer free on-site estimates for all project types across Chicago and the suburbs. Our team responds the same day.
