Postcode district

Flood risk in AL2

How exposed the AL2 postcode district (Hertsmere and St Albans) is to flooding from rivers, the sea and surface water, from a sample of points checked against the Environment Agency maps.

20%in Flood Zone 2 or 3
0%in Flood Zone 3
0%medium or high river and sea risk
0%some surface water risk

Based on 5 points spread across the district. An indication of the area, not a count of properties.

What the maps show around AL2

Some of the ground in this district is in a flood zone or at risk of surface water flooding, and the difference between streets can be large. We checked 5 points spread across the district: the centre and four points about 900 m away.

20% of the sample points are in Flood Zone 2 or 3 · 0% have some surface water risk Overall: mixed risk. This describes the district as a whole, not your street.

Rivers and the sea

High0 of 5
Medium0 of 5
Low1 of 5
Very low4 of 5

Surface water

High0 of 5
Medium0 of 5
Low0 of 5
Very low5 of 5
Show as a table
Flood risk bands across the sample points
Risk bandRivers and seaSurface waterAnnual chance of flooding
High 0 of 5 0 of 5 more than 3.3%
Medium 0 of 5 0 of 5 1% to 3.3%
Low 1 of 5 0 of 5 0.1% to 1%
Very low 4 of 5 5 of 5 less than 0.1%

Flood zone: 0 of 5 points in Zone 3 and 1 in Zone 2.

Flood warning areas near AL2

The Environment Agency issues flood alerts and warnings for these named areas within about six kilometres of the district centre.

River Ver at St Albans

The River Ver at St Albans including Sopwell, Park Street and Frogmore

River Ver Hertfordshire

River Colne at London Colney

The River Colne at London Colney including Colney Street and Broad Colney

River Colne Hertfordshire

Radlett Brook at Radlett

The Radlett Brook at Radlett

Radlett Brook Hertfordshire

Upper River Colne and Radlett Brook

The Upper River Colne and Radlett Brook at Colney Heath, London Colney, Borehamwood and Radlett

River Colne Hertfordshire

River Ver in Hertfordshire

The River Ver at Markyate, Redbourn and St. Albans

River Ver Central Bedfordshire, Hertfordshire

Radlett and Borehamwood Brooks at Borehamwood

The Radlett and Borehamwood Brooks at Borehamwood

Radlett Brook Hertfordshire

You can sign up for free flood warnings for your own address on GOV.UK.

Check your own AL2 postcode

The figures above describe the district. Your home is one point in it, and that point is what the check reads.

This district spans Hertsmere and St Albans.

£14.95 · one off

Will your address flood, and can you get it insured and mortgaged?

Enter an English postcode and see free of charge its flood zone and the risk bands for rivers, the sea and surface water. What the numbers mean, which past floods were recorded around the property, which warning areas cover it and what to ask your insurer, surveyor and solicitor is in the report for that one point.

A flood is the most expensive thing that can happen to a home, and a flood zone or a surface water flow path can change the insurance terms, the mortgage offer and the resale price. The report gathers the Environment Agency data for your address before you commit; it is not a substitute for a flood search from your conveyancer.

See a sample report (PDF)

🔒 Card or PayPal via Mollie · download straight after payment, emailed as well · no subscription
Source: Environment Agency under the Open Government Licence · not a substitute for a flood search

Questions

Frequently asked questions

Is AL2 in a flood zone?

Part of it. Of 5 sample points spread across the AL2 postcode district, 1 (20%) fall in Flood Zone 2 or 3. Flood zones follow rivers and coastlines, so whether your own home is in one depends on the exact spot. Check your full postcode to find out.

Is surface water flooding a risk in AL2?

None of the 5 sample points rate above very low for surface water flooding. Surface water risk is highly local, so check your own postcode.

Which flood warning areas cover AL2?

The Environment Agency issues flood alerts and warnings for named areas. Within about six kilometres of the centre of AL2 these include River Ver at St Albans, River Colne at London Colney and Radlett Brook at Radlett. You can sign up for free flood warnings for your address on GOV.UK.

How accurate is a postcode district summary?

It is an indication, not a verdict on any single home. We checked 5 points around the centre of the district against the Environment Agency maps. A district can hold many streets and a flood zone can be a few metres wide. The free check on a full postcode, with a pin you can move onto your plot, is the precise answer.