What matters for project planning
Structural repair engages this framework through excavation. Underpinning and exterior drainage work are land-disturbing activity that Champaign permits and for which an approved stormwater control plan can be required. If the repair routes water to a new or modified municipal stormwater connection, that carries its own permit and fee. The coordination between Champaign, Champaign County, Urbana, the University and Savoy also matters more than it sounds: on a boundary parcel, establishing which authority reviews the work is the first step, not the last.
Official sources
City-level facts don't replace a parcel check
None of the county- or city-wide detail above establishes what's true for one specific lot -- flood-zone status, historic-district rules, permit history, soil report, or what's buried underground. Run those down for the actual Champaign parcel with the relevant office and whichever provider you pick, before anything gets dug up.
These sources were checked 2026-07-26; municipal rules and mapped boundaries shift, so treat this as a starting point, not the final word.