What matters for project planning
Candidly, the city's stormwater and floodplain framework has almost no bearing on re-cladding a house. Land-disturbing permitting concerns ground disturbance; on-site stormwater control facilities concern where site water goes; the countywide ordinance DuPage County Stormwater Management enforces concerns drainage. None of those describe removing and replacing siding. The exception, as elsewhere, is scale inside the mapped floodplain. What genuinely governs a siding outcome is what sits behind the cladding — the water-resistive barrier and the sheathing under it — which no municipal record will tell you.
Official sources
Verify the property, not just the city
Citywide context cannot establish a parcel’s flood zone, historic designation, stream buffer, permit requirements, soil conditions, or concealed construction. Confirm those items with the appropriate authority and selected provider before work begins.
Sources reviewed 2026-07-26. External requirements and maps can change.