1 appeal window open
Flood map changes in Maryland
Since November 2023, FEMA has published flood hazard notices covering 8 of Maryland's 24 counties.
| County | Notices | Most recent | Appeal window |
|---|---|---|---|
| Carroll County | 2 | Aug 21, 2026 | — |
| Howard County | 1 | Aug 21, 2026 | Open until Nov 19, 2026 |
| Baltimore County | 5 | Aug 6, 2026 | — |
| Anne Arundel County | 4 | Jun 11, 2026 | — |
| Montgomery County | 3 | Jun 11, 2026 | — |
| St. Mary's County | 1 | Jan 16, 2025 | — |
| Frederick County | 3 | Nov 25, 2024 | — |
| Prince George's County | 1 | Apr 22, 2024 | — |
All counties in Maryland
- Allegany County
- Anne Arundel County
- Baltimore city
- Baltimore County
- Calvert County
- Caroline County
- Carroll County
- Cecil County
- Charles County
- Dorchester County
- Frederick County
- Garrett County
- Harford County
- Howard County
- Kent County
- Montgomery County
- Prince George's County
- Queen Anne's County
- Somerset County
- St. Mary's County
- Talbot County
- Washington County
- Wicomico County
- Worcester County
What these notices mean
- Proposed
- FEMA has new draft flood maps. This starts a 90-day window when owners can appeal with technical data. It's the best time to act.
- Final
- Appeals are resolved. The new maps usually take effect about six months later, when lenders start applying the new zones.
- Map revision
- A Letter of Map Revision changes one stretch of the map, often after a levee, channel project or new survey.
Notices are organized by county and community, so a notice for your county doesn't mean your property is changing zones. What flood zones mean