Flood zone regulatory clarity
Summary
The update switches the 'substantial improvement' rule from a 20-year to a 5-year tally, making it far easier for floodplain homeowners to renovate without triggering full flood-proofing — while keeping the same 5% flood insurance discount.
At a glance
- Total mentions
- 2
- Last 30 days
- 0
Last discussed Apr 7, 2026.
Impact analysis
Floodplain homeowners keep a 5% flood insurance discount and gain more flexibility for renovations.
Property owners in the floodplain planning renovations.
Mentions & discussions (2)
Planning Commission - Apr 7, 2026
The update switches the 'substantial improvement' rule from a 20-year to a 5-year tally, making it far easier for floodplain homeowners to renovate without triggering full flood-proofing — while keeping the same 5% flood insurance discount.
Planning Commission - Jan 20, 2026
A commissioner raised that flood-zone rules are hard to navigate — unclear lines between zoning permissions and FEMA special flood hazard area requirements along Spearfish Creek. Staff agreed to work the issue into the assessment.
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