Bathroom Renovation Permits and Plumbing Questions

Cosmetic vs. plumbing vs. layout changes — and why scope determines approvals.

Shower under construction with orange waterproofing membrane on walls and a sloped floor around the drain

This is general information, not legal advice. Permit requirements depend on your exact scope and can change. A properly licensed professional should determine what your project needs, and the City of Chicago's own guidance is the authority.

Scope is what matters

Not all bathroom work is treated the same. Painting, replacing a mirror or swapping a light fixture in place is different from moving a drain, adding a circuit or removing a wall. Plumbing, electrical and structural changes are where permits and licensed trades most often come in.

Plumbing work

In Chicago, plumbing work is generally performed by licensed plumbers. The City publishes FAQs on plumbing licensing requirements.

General contractors

The City also licenses general contractors. If someone is managing your project, ask for their license information and verify it.

Express permits

The City has an Express Permit Program for certain limited scopes of work. Whether your project qualifies depends on its details — don't assume eligibility based on project type alone.

Questions to ask a contractor

Does this scope require a permit?
Who will apply for it?
Which licensed trades will perform plumbing and electrical work?
Will there be inspections, and when?

Official sources

Links are provided for reference. We're not affiliated with the City of Chicago.