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
City-wide guidance can't establish a specific parcel's flood zone, historic designation, stream buffer, permits, soil, or concealed construction -- confirm those with Columbia's authority and the provider.
Research date
Reviewed in 2026; requirements and maps change, so confirm what's current.