Does HA5 flood?

Yes — parts of the HA5 district carry real flood risk: 52 of its 164 at-risk postcodes reach the Environment Agency's High likelihood band. The HA5 postcode district covers Pinner South, Hatch End, Pinner, Eastcote, close to North Harrow, Ruislip, Northolt, and surrounding villages in parts of England and Hertfordshire.

164 postcodes in the HA5 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 52 high, 34 medium, 69 low, 9 very low. A postcode not listed here has no properties in any recorded risk band (which is good news, but never proof it cannot flood).

Free preview first · full report £19

Which HA5 postcodes are at risk?

HA5 1AA up to High HA5 1BY up to High HA5 1DU up to High HA5 1EL up to High HA5 1HF up to High HA5 1HJ up to High HA5 1HN up to High HA5 2BG up to High HA5 2HX up to High HA5 2JX up to High HA5 2JY up to High HA5 2NZ up to High HA5 2PZ up to High HA5 2SY up to High HA5 3AZ up to High HA5 3BW up to High HA5 3DX up to High HA5 3HR up to High HA5 3JE up to High HA5 3PX up to High HA5 3RG up to High HA5 3RH up to High HA5 3RQ up to High HA5 4BT up to High HA5 4EL up to High HA5 4RN up to High HA5 4RR up to High HA5 4SS up to High HA5 4TL up to High HA5 4TN up to High HA5 4TW up to High HA5 4TX up to High HA5 4TY up to High HA5 4TZ up to High HA5 4UB up to High HA5 4UD up to High HA5 5AA up to High HA5 5AZ up to High HA5 5BA up to High HA5 5FA up to High HA5 5HX up to High HA5 5HY up to High HA5 5JY up to High HA5 5LX up to High HA5 5LZ up to High HA5 5NA up to High HA5 5NE up to High HA5 5NF up to High HA5 5NG up to High HA5 5PB up to High HA5 5PJ up to High HA5 5QQ up to High HA5 1BB up to Medium HA5 1DS up to Medium HA5 1EA up to Medium HA5 1EE up to Medium HA5 1EH up to Medium HA5 1EJ up to Medium HA5 1EN up to Medium HA5 1HH up to Medium HA5 1HL up to Medium HA5 1JX up to Medium HA5 2EG up to Medium HA5 2ET up to Medium HA5 2HU up to Medium HA5 2HY up to Medium HA5 2JZ up to Medium HA5 2PY up to Medium HA5 2QL up to Medium HA5 2RP up to Medium HA5 3BX up to Medium HA5 3ET up to Medium HA5 3EZ up to Medium HA5 3HA up to Medium HA5 3HD up to Medium HA5 3HF up to Medium HA5 3HQ up to Medium HA5 3HT up to Medium HA5 3HU up to Medium HA5 3JD up to Medium HA5 3JP up to Medium HA5 5JE up to Medium HA5 5LB up to Medium HA5 5PA up to Medium HA5 5PF up to Medium HA5 5PW up to Medium HA5 1BU up to Low HA5 1BX up to Low HA5 1DH up to Low HA5 1DT up to Low HA5 1DY up to Low HA5 1DZ up to Low HA5 1ED up to Low HA5 1EG up to Low HA5 1EQ up to Low HA5 1EW up to Low HA5 1JH up to Low HA5 1JU up to Low HA5 2EN up to Low HA5 2ER up to Low HA5 2JU up to Low HA5 2LA up to Low HA5 2RW up to Low HA5 3AU up to Low HA5 3AY up to Low HA5 3BY up to Low HA5 3EE up to Low HA5 3ES up to Low HA5 3TT up to Low HA5 3TU up to Low HA5 4AA up to Low HA5 4AB up to Low HA5 4AG up to Low HA5 4AQ up to Low HA5 4BH up to Low HA5 4BL up to Low HA5 4DF up to Low HA5 4DS up to Low HA5 4DT up to Low HA5 4EA up to Low HA5 4ED up to Low HA5 4EN up to Low HA5 4FG up to Low HA5 4HA up to Low HA5 4HF up to Low HA5 4HR up to Low HA5 4JR up to Low HA5 4JS up to Low HA5 4LD up to Low HA5 4ND up to Low HA5 4NE up to Low HA5 4NL up to Low HA5 4NN up to Low HA5 4NZ up to Low HA5 4PA up to Low HA5 4PB up to Low HA5 4PD up to Low HA5 4QX up to Low HA5 4RA up to Low HA5 4RT up to Low HA5 4SB up to Low HA5 4SN up to Low HA5 4SR up to Low HA5 4UH up to Low HA5 5AD up to Low HA5 5AU up to Low HA5 5AX up to Low HA5 5HJ up to Low HA5 5JF up to Low HA5 5JG up to Low HA5 5JR up to Low HA5 5LG up to Low HA5 5LU up to Low HA5 5NT up to Low HA5 5NX up to Low HA5 1AS up to Very low HA5 1BJ up to Very low HA5 1BT up to Very low HA5 1HB up to Very low HA5 3BT up to Very low HA5 3BZ up to Very low HA5 4LU up to Very low HA5 4NB up to Very low HA5 4PE up to Very low

Rivers and flooding history near HA5

The rivers that matter here, each monitored live on FloodRadar:

318 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (26 at warning level or above), most recently 27 August 2026. Warnings cover flood areas, not individual addresses.

Recorded flood extents near the district (Environment Agency record):

🏠 Buying or renting in HA5? The full property flood-risk report covers any postcode here — the official likelihood band, every recorded flood nearby with distances, warning history year by year, how the local rivers behave, and an insurance outlook, print-ready for £19. See what's in the report →

Flood risk in nearby postcode districts

HA4 HA6 HA3 HA7 HA2 HA8 HA1 HA9

Band = the worst likelihood band of any property in that postcode (EA Risk of Flooding from Rivers & Sea, defence-adjusted, area-level). Check any postcode in detail — or get the full £19 property report — at the property flood-risk report. © Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064.