Ballymena Flood Risk
Ballymena has a Medium flood risk from rivers and the sea , with 5.1% of homes in a Medium or High band.
Ballymena has 29,551 residents and 1 homes. Ranked 70 of 527 in Northern Ireland for rivers and sea flood risk.
Read this before relying on these figures. Northern Ireland's own flood maps are not published under an open licence, so the band above is modelled, not DfI's official mapping. The model is undefended — it does not account for flood defences, so a defended town can read as more exposed than DfI's own map shows — and it covers rivers only. For a property-level answer, use Flood Maps NI.
What Does Ballymena's Flood Risk Classification Mean?
The flood risk band for rivers and the sea is Medium , with 5.1% of homes in a Medium or High band. Unlike the Flood Zone, the band counts the defences that are actually in place, which is why the two can describe the same street differently and both be right.
Flood Zone versus flood risk band: the full comparison · What the Flood Zones mean
Which Postcode Districts Cover Ballymena?
Each district below is one postcode district that falls inside Ballymena. The band is the one shared by most of that district's postcodes, so it describes the district rather than a single street — enter a full postcode in the checker for one address. A district can cover more than one town: every district here overlaps another place, so the checker may name a neighbouring town for some of these postcodes.
| Postcode district | Postcodes here | Rivers and sea band | Surface water addresses |
|---|---|---|---|
| BT43 | 363 | Not mapped — no rivers-and-sea band covers this district | not published for this district |
| BT42 | 321 | High | not published for this district |
"Not mapped" is not "no risk". It means no rivers-and-sea band covers that district in the source — surface water can still flood it, and both Camden and Islington flooded from surface water in July 2021 while carrying no mapped rivers-and-sea band.
How Does Flood Risk Affect Insurance And Buying In Ballymena?
A Medium flood risk band can affect the price, the excess and the availability of home insurance, and it is worth checking before you buy. Flood cover is normally part of standard home insurance, and insurers set their own prices.
How insurers price flood risk, what Flood Re covers, and what to do if a standard insurer declines.
The eight statutory conditions, with an eligibility checker that gives a real verdict.
Barriers, airbricks, pumps and non-return valves, ranked by what they protect against.
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