Flood Zone Comparison
Compare key metrics between 20855 20855, MD — Zone AE and 24657 24657, VA — Zone AE. Data sourced from FEMA National Flood Hazard Layer (2025).
| Metric | 20855 20855, MD — Zone AE | 24657 24657, VA — Zone AE |
|---|---|---|
| name | 20855 20855, MD — Zone AE | 24657 24657, VA — Zone AE |
| zip code | 20855 | 24657 |
| city | 20855 | 24657 |
| state | Maryland | Virginia |
| state code | MD | VA |
| category | High Risk | High Risk |
| flood zone | Zone AE (High Risk — 100-Year Floodplain) | Zone AE (High Risk — 100-Year Floodplain) |
| risk level | High Risk | High Risk |
| annual flood prob | 1% annual chance (100-year flood) | 1% annual chance (100-year flood) |
| insurance required | Required for federally-backed mortgages | Required for federally-backed mortgages |
| avg annual premium | 2,394 | 2,394 |
| base flood elevation | 27 ft | 29 ft |
| historical floods | 1 recorded flood events in the past 50 years. Most recent major flood: 2015 | 13 recorded flood events in the past 50 years. Most recent major flood: 2009 |
| nearest water | Savannah River (0.9 miles) | Atlantic Ocean (2.6 miles) |
| elevation ft | 381 | 1,031 |
| population | 18,591 | 48,160 |
| median home value | 355,576 | 424,557 |
| flood damage risk | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $193,015 | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $84,174 |
| mitigation tips | Elevate utilities above base flood elevation; install sump pumps with battery backup; consider flood-proofing ground floor; maintain flood insurance; create an emergency evacuation plan; store important documents above flood level. | Elevate utilities above base flood elevation; install sump pumps with battery backup; consider flood-proofing ground floor; maintain flood insurance; create an emergency evacuation plan; store important documents above flood level. |
| fema map id | 4170C791J | 5182C842J |
| last updated | 2025-01-01 | 2025-01-01 |
Our team analyzes data from FEMA National Flood Hazard Layer to deliver accurate, up-to-date information. All data is verified and cross-referenced with official sources.