What matters for project planning
Columbia provides historic-preservation guidance and a municipal stormwater program. Local designation, flood and drainage conditions, easements, and permits should be verified before exterior, structural, or site work begins.
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.
Research date
Sources reviewed June 20, 2026. External requirements and maps can change.