HA4 9 postcode sector in the HA4 district

HA4 9 is a sector of the HA4 district: every postcode that starts HA4 9. It has 202 postcodes in use, 2 of them large-user postcodes. A large-user postcode is one Royal Mail gives to a single address that gets a lot of mail.

Not sure what a sector is? UK postcode format explained.

Every postcode in the HA4 9 sector, by flood risk

Map of every postcode in the HA4 9 sector, by flood risk Of the 202 postcodes in the HA4 9 sector that ONS places, 2 have a home or business at high risk, 2 are at medium risk at worst, 8 are at low risk at worst and 190 are not on the Environment Agency's at-risk list. Places named: Eastcote, Ruislip Manor. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. HA4 9AA: not on the flood risk listHA4 9AB: not on the flood risk listHA4 9AD: not on the flood risk listHA4 9AE: not on the flood risk listHA4 9AF: not on the flood risk listHA4 9AG: not on the flood risk listHA4 9AH: not on the flood risk listHA4 9AJ: not on the flood risk listHA4 9AL: not on the flood risk listHA4 9AN: not on the flood risk listHA4 9AP: not on the flood risk listHA4 9AQ: not on the flood risk listHA4 9AR: not on the flood risk listHA4 9AS: not on the flood risk listHA4 9AT: not on the flood risk listHA4 9AU: not on the flood risk listHA4 9AW: not on the flood risk listHA4 9AX: not on the flood risk listHA4 9AY: not on the flood risk listHA4 9BF: not on the flood risk listHA4 9BH: not on the flood risk listHA4 9BL: not on the flood risk listHA4 9BN: not on the flood risk listHA4 9BP: not on the flood risk listHA4 9BS: not on the flood risk listHA4 9BT: not on the flood risk listHA4 9BU: not on the flood risk listHA4 9BW: not on the flood risk listHA4 9BX: not on the flood risk listHA4 9BY: not on the flood risk listHA4 9BZ: not on the flood risk listHA4 9DA: not on the flood risk listHA4 9DB: not on the flood risk listHA4 9DD: not on the flood risk listHA4 9DE: not on the flood risk listHA4 9DF: not on the flood risk listHA4 9DL: not on the flood risk listHA4 9DN: not on the flood risk listHA4 9DQ: not on the flood risk listHA4 9DT: not on the flood risk listHA4 9DX: not on the flood risk listHA4 9DZ: not on the flood risk listHA4 9ED: not on the flood risk listHA4 9EF: not on the flood risk listHA4 9EG: not on the flood risk listHA4 9EH: not on the flood risk listHA4 9EJ: not on the flood risk listHA4 9EL: not on the flood risk listHA4 9EN: not on the flood risk listHA4 9EP: not on the flood risk listHA4 9EQ: not on the flood risk listHA4 9EW: not on the flood risk listHA4 9EY: not on the flood risk listHA4 9HB: not on the flood risk listHA4 9HD: not on the flood risk listHA4 9HF: not on the flood risk listHA4 9HG: not on the flood risk listHA4 9HH: not on the flood risk listHA4 9HJ: not on the flood risk listHA4 9HL: not on the flood risk listHA4 9HN: not on the flood risk listHA4 9HP: not on the flood risk listHA4 9HR: not on the flood risk listHA4 9HS: not on the flood risk listHA4 9HT: not on the flood risk listHA4 9HW: not on the flood risk listHA4 9JD: not on the flood risk listHA4 9JE: not on the flood risk listHA4 9JF: not on the flood risk listHA4 9JG: not on the flood risk listHA4 9JH: not on the flood risk listHA4 9JJ: not on the flood risk listHA4 9JL: not on the flood risk listHA4 9JN: not on the flood risk listHA4 9JP: not on the flood risk listHA4 9JQ: not on the flood risk listHA4 9JR: not on the flood risk listHA4 9JS: not on the flood risk listHA4 9JT: not on the flood risk listHA4 9JU: not on the flood risk listHA4 9JW: not on the flood risk listHA4 9LB: not on the flood risk listHA4 9LD: not on the flood risk listHA4 9LE: not on the flood risk listHA4 9LF: not on the flood risk listHA4 9LG: not on the flood risk listHA4 9LP: not on the flood risk listHA4 9LR: not on the flood risk listHA4 9LS: not on the flood risk listHA4 9LU: not on the flood risk listHA4 9LX: not on the flood risk listHA4 9LY: not on the flood risk listHA4 9LZ: not on the flood risk listHA4 9NB: not on the flood risk listHA4 9ND: not on the flood risk listHA4 9NE: not on the flood risk listHA4 9NF: not on the flood risk listHA4 9NG: not on the flood risk listHA4 9NJ: not on the flood risk listHA4 9NQ: not on the flood risk listHA4 9NR: not on the flood risk listHA4 9NS: not on the flood risk listHA4 9NX: not on the flood risk listHA4 9NY: not on the flood risk listHA4 9NZ: not on the flood risk listHA4 9PA: not on the flood risk listHA4 9PB: not on the flood risk listHA4 9PD: not on the flood risk listHA4 9PE: not on the flood risk listHA4 9PF: not on the flood risk listHA4 9PG: not on the flood risk listHA4 9PQ: not on the flood risk listHA4 9PR: not on the flood risk listHA4 9PS: not on the flood risk listHA4 9PT: not on the flood risk listHA4 9PU: not on the flood risk listHA4 9PX: not on the flood risk listHA4 9PY: not on the flood risk listHA4 9PZ: not on the flood risk listHA4 9QA: not on the flood risk listHA4 9QB: not on the flood risk listHA4 9QD: not on the flood risk listHA4 9QE: not on the flood risk listHA4 9QF: not on the flood risk listHA4 9QG: not on the flood risk listHA4 9QH: not on the flood risk listHA4 9QJ: not on the flood risk listHA4 9QL: not on the flood risk listHA4 9QN: not on the flood risk listHA4 9QQ: not on the flood risk listHA4 9QX: not on the flood risk listHA4 9QY: not on the flood risk listHA4 9QZ: not on the flood risk listHA4 9RA: not on the flood risk listHA4 9RB: not on the flood risk listHA4 9RD: not on the flood risk listHA4 9RE: not on the flood risk listHA4 9RF: not on the flood risk listHA4 9RG: not on the flood risk listHA4 9RH: not on the flood risk listHA4 9RJ: not on the flood risk listHA4 9RL: not on the flood risk listHA4 9RN: not on the flood risk listHA4 9RP: not on the flood risk listHA4 9RQ: not on the flood risk listHA4 9RW: not on the flood risk listHA4 9RY: not on the flood risk listHA4 9RZ: not on the flood risk listHA4 9SA: not on the flood risk listHA4 9SB: not on the flood risk listHA4 9SD: not on the flood risk listHA4 9SE: not on the flood risk listHA4 9SF: not on the flood risk listHA4 9SG: not on the flood risk listHA4 9SH: not on the flood risk listHA4 9SJ: not on the flood risk listHA4 9SL: not on the flood risk listHA4 9SN: not on the flood risk listHA4 9SP: not on the flood risk listHA4 9SQ: not on the flood risk listHA4 9SR: not on the flood risk listHA4 9SS: not on the flood risk listHA4 9ST: not on the flood risk listHA4 9SU: not on the flood risk listHA4 9SW: not on the flood risk listHA4 9TA: not on the flood risk listHA4 9TD: not on the flood risk listHA4 9TE: not on the flood risk listHA4 9TF: not on the flood risk listHA4 9TG: not on the flood risk listHA4 9TH: not on the flood risk listHA4 9TJ: not on the flood risk listHA4 9TL: not on the flood risk listHA4 9TN: not on the flood risk listHA4 9TP: not on the flood risk listHA4 9TQ: not on the flood risk listHA4 9TR: not on the flood risk listHA4 9TS: not on the flood risk listHA4 9TT: not on the flood risk listHA4 9TU: not on the flood risk listHA4 9TW: not on the flood risk listHA4 9TX: not on the flood risk listHA4 9TY: not on the flood risk listHA4 9TZ: not on the flood risk listHA4 9UA: not on the flood risk listHA4 9UR: not on the flood risk listHA4 9UU: not on the flood risk listHA4 9XG: not on the flood risk listHA4 9YS: not on the flood risk listHA4 9DG: low flood risk at worstHA4 9DP: low flood risk at worstHA4 9DR: low flood risk at worstHA4 9DS: low flood risk at worstHA4 9DU: low flood risk at worstHA4 9EE: low flood risk at worstHA4 9HA: low flood risk at worstHA4 9HQ: low flood risk at worstHA4 9EA: medium flood risk at worstHA4 9EB: medium flood risk at worstHA4 9DY: high flood riskHA4 9EZ: high flood risk EastcoteRuislip Manor Map of every postcode in the HA4 9 sector, by flood risk Of the 202 postcodes in the HA4 9 sector that ONS places, 2 have a home or business at high risk, 2 are at medium risk at worst, 8 are at low risk at worst and 190 are not on the Environment Agency's at-risk list. Places named: Eastcote, Ruislip Manor. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. EastcoteRuislip Manor
  • A home or business at high risk: 2
  • At medium risk at worst: 2
  • At low risk at worst: 8
  • At very low risk only: 0
  • Not on the at-risk list: 190

Of the 202 postcodes in the HA4 9 sector that ONS places, 2 have a home or business at high risk, 2 are at medium risk at worst, 8 are at low risk at worst and 190 are not on the Environment Agency's at-risk list.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode. Names in italics are council wards: we hold no town or village names here.

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

The postcodes at high risk

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

HA4 9DY20 at high riskHA4 9EZ7 at high risk

What do homes sell for in HA4 9?

Homes in HA4 9 sold for a typical £556,000 in the 12 months to August 2026, across 92 sales, down 4.4% on the 12 months before, HM Land Registry's figures show.

£556,000 typical price, the 12 months to August 2026
£581,875 12 months to August 2025
▼ down 4.4% on the 12 months before
  • Detached 4 sales, too few to price
  • Semi-detached £628,000 42 sales
  • Terraced £520,000 33 sales
  • Flat or maisonette £345,000 13 sales

Each bar is that kind's typical price, against the most expensive kind here.

Standard sales of homes at market value at the postcodes that start HA4 9. A typical price is the median, the middle sale, given from 5 sales or more.

How we work this out: house prices by postcode

Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it

Postcodes in HA4 9

Pick a postcode to see its council and MP, broadband, flood risk, what homes sell for, council tax, the nearest schools and stations, and crime around it.

HA4 9AAHA4 9ABHA4 9ADHA4 9AEHA4 9AFHA4 9AGHA4 9AHHA4 9AJHA4 9ALHA4 9ANHA4 9APHA4 9AQHA4 9ARHA4 9ASHA4 9ATHA4 9AUHA4 9AWHA4 9AXHA4 9AYHA4 9BFHA4 9BHHA4 9BLHA4 9BNHA4 9BPHA4 9BSHA4 9BTHA4 9BUHA4 9BWHA4 9BXHA4 9BYHA4 9BZHA4 9DAHA4 9DBHA4 9DDHA4 9DEHA4 9DFHA4 9DGHA4 9DLHA4 9DNHA4 9DPHA4 9DQHA4 9DRHA4 9DSHA4 9DTHA4 9DUHA4 9DXHA4 9DYHA4 9DZHA4 9EAHA4 9EBHA4 9EDHA4 9EEHA4 9EFHA4 9EGHA4 9EHHA4 9EJHA4 9ELHA4 9ENHA4 9EPHA4 9EQHA4 9EWHA4 9EYHA4 9EZHA4 9HAHA4 9HBHA4 9HDHA4 9HFHA4 9HGHA4 9HHHA4 9HJHA4 9HLHA4 9HNHA4 9HPHA4 9HQHA4 9HRHA4 9HSHA4 9HTHA4 9HWHA4 9JDHA4 9JEHA4 9JFHA4 9JGHA4 9JHHA4 9JJHA4 9JLHA4 9JNHA4 9JPHA4 9JQHA4 9JRHA4 9JSHA4 9JTHA4 9JUHA4 9JWHA4 9LBHA4 9LDHA4 9LEHA4 9LFHA4 9LGHA4 9LPHA4 9LRHA4 9LSHA4 9LUHA4 9LXHA4 9LYHA4 9LZHA4 9NBHA4 9NDHA4 9NEHA4 9NFHA4 9NGHA4 9NJHA4 9NQHA4 9NRHA4 9NSHA4 9NXHA4 9NYHA4 9NZHA4 9PAHA4 9PBHA4 9PDHA4 9PEHA4 9PFHA4 9PGHA4 9PQHA4 9PRHA4 9PSHA4 9PTHA4 9PUHA4 9PXHA4 9PYHA4 9PZHA4 9QAHA4 9QBHA4 9QDHA4 9QEHA4 9QFHA4 9QGHA4 9QHHA4 9QJHA4 9QLHA4 9QNHA4 9QQHA4 9QXHA4 9QYHA4 9QZHA4 9RAHA4 9RBHA4 9RDHA4 9REHA4 9RFHA4 9RGHA4 9RHHA4 9RJHA4 9RLHA4 9RNHA4 9RPHA4 9RQHA4 9RWHA4 9RYHA4 9RZHA4 9SAHA4 9SBHA4 9SDHA4 9SEHA4 9SFHA4 9SGHA4 9SHHA4 9SJHA4 9SLHA4 9SNHA4 9SPHA4 9SQHA4 9SRHA4 9SSHA4 9STHA4 9SUHA4 9SWHA4 9TAHA4 9TDHA4 9TEHA4 9TFHA4 9TGHA4 9THHA4 9TJHA4 9TLHA4 9TNHA4 9TPHA4 9TQHA4 9TRHA4 9TSHA4 9TTHA4 9TUHA4 9TWHA4 9TXHA4 9TYHA4 9TZHA4 9UAHA4 9URHA4 9UUHA4 9XAHA4 9XGHA4 9YS

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed. See all our data sources

What council am I in? The council, borough or local authority for a postcode, and the county council where there is one. What ward am I in? The ward for a postcode, with its council, constituency and parish.

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