Bathroom Remodeling in Chicago, IL

Two layers: the general contractor needs a City of Chicago general contractor license from the Department of Buildings, and anyone performing plumbing must hold an Illinois plumbing license under the state Plumbing License Law. You can check trade contractors in the city's online licensed-contractor registry and verify plumbers through IDPH's license verification site.

Yes for anything beyond cosmetic replacement. Chicago requires permits when plumbing is moved or replaced, walls are altered, or electrical circuits change; simple like-for-like fixture swaps may qualify for the city's streamlined permit processes. Your licensed GC typically pulls the permit — be wary of any contractor who asks you to skip it in a city this strict.

With a median year built of 1953, the classics are: galvanized supply lines that have outlived their 40–50 year lifespan, cast-iron stacks with corroded hubs, plaster-and-lath walls that complicate demolition, and drain lines that no longer meet code once opened. Experienced Chicago remodelers price a contingency (often 10–20% of budget) for exactly these conditions.

Expect the upper half of the national range — Angi's 2026 average is $12,142 with typical projects between $2,500 and $30,000, and Chicago's licensing, permit, and labor costs push most full remodels well above the average. On resale, Zonda's 2025 Cost vs. Value data shows midrange bathroom remodels recouping about 80% nationally, a strong return in Chicago's older housing stock where updated baths stand out.