HA4 0 postcode sector in the HA4 district

HA4 0 is a sector of the HA4 district: every postcode that starts HA4 0. It has 219 postcodes in use, 9 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 0 sector, by flood risk

Map of every postcode in the HA4 0 sector, by flood risk Of the 219 postcodes in the HA4 0 sector that ONS places, 5 have a home or business at high risk, 18 are at medium risk at worst, 28 are at low risk at worst and 168 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 6 postcodes at high or medium risk; 5 postcodes at high or medium risk. Places named: South Ruislip, Ruislip Manor. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. HA4 0AA: not on the flood risk listHA4 0AB: not on the flood risk listHA4 0AG: not on the flood risk listHA4 0AH: not on the flood risk listHA4 0AL: not on the flood risk listHA4 0AN: not on the flood risk listHA4 0AP: not on the flood risk listHA4 0AR: not on the flood risk listHA4 0AS: not on the flood risk listHA4 0AT: not on the flood risk listHA4 0AU: not on the flood risk listHA4 0AW: not on the flood risk listHA4 0AX: not on the flood risk listHA4 0AY: not on the flood risk listHA4 0AZ: not on the flood risk listHA4 0BA: not on the flood risk listHA4 0BB: not on the flood risk listHA4 0BD: not on the flood risk listHA4 0BG: not on the flood risk listHA4 0BH: not on the flood risk listHA4 0BJ: not on the flood risk listHA4 0BN: not on the flood risk listHA4 0BP: not on the flood risk listHA4 0BS: not on the flood risk listHA4 0BT: not on the flood risk listHA4 0BU: not on the flood risk listHA4 0BW: not on the flood risk listHA4 0BX: not on the flood risk listHA4 0BY: not on the flood risk listHA4 0BZ: not on the flood risk listHA4 0DA: not on the flood risk listHA4 0DH: not on the flood risk listHA4 0DJ: not on the flood risk listHA4 0DL: not on the flood risk listHA4 0DN: not on the flood risk listHA4 0DQ: not on the flood risk listHA4 0DT: not on the flood risk listHA4 0DW: not on the flood risk listHA4 0EB: not on the flood risk listHA4 0ED: not on the flood risk listHA4 0EE: not on the flood risk listHA4 0EF: not on the flood risk listHA4 0EG: not on the flood risk listHA4 0EH: not on the flood risk listHA4 0EJ: not on the flood risk listHA4 0EP: not on the flood risk listHA4 0EQ: not on the flood risk listHA4 0ER: not on the flood risk listHA4 0ES: not on the flood risk listHA4 0ET: not on the flood risk listHA4 0EU: not on the flood risk listHA4 0EW: not on the flood risk listHA4 0EX: not on the flood risk listHA4 0EY: not on the flood risk listHA4 0EZ: not on the flood risk listHA4 0FF: not on the flood risk listHA4 0FY: not on the flood risk listHA4 0GD: not on the flood risk listHA4 0GE: not on the flood risk listHA4 0GF: not on the flood risk listHA4 0HA: not on the flood risk listHA4 0HB: not on the flood risk listHA4 0HD: not on the flood risk listHA4 0HG: not on the flood risk listHA4 0HH: not on the flood risk listHA4 0HJ: not on the flood risk listHA4 0HL: not on the flood risk listHA4 0HN: not on the flood risk listHA4 0HP: not on the flood risk listHA4 0HR: not on the flood risk listHA4 0HT: not on the flood risk listHA4 0HU: not on the flood risk listHA4 0HW: not on the flood risk listHA4 0HX: not on the flood risk listHA4 0HY: not on the flood risk listHA4 0HZ: not on the flood risk listHA4 0JA: not on the flood risk listHA4 0JD: not on the flood risk listHA4 0JP: not on the flood risk listHA4 0JW: not on the flood risk listHA4 0LU: not on the flood risk listHA4 0LX: not on the flood risk listHA4 0LY: not on the flood risk listHA4 0LZ: not on the flood risk listHA4 0NA: not on the flood risk listHA4 0NB: not on the flood risk listHA4 0ND: not on the flood risk listHA4 0NF: not on the flood risk listHA4 0NG: not on the flood risk listHA4 0NH: not on the flood risk listHA4 0NJ: not on the flood risk listHA4 0NL: not on the flood risk listHA4 0NN: not on the flood risk listHA4 0NQ: not on the flood risk listHA4 0NR: not on the flood risk listHA4 0NS: not on the flood risk listHA4 0NT: not on the flood risk listHA4 0NU: not on the flood risk listHA4 0NW: not on the flood risk listHA4 0PL: not on the flood risk listHA4 0PP: not on the flood risk listHA4 0PS: not on the flood risk listHA4 0PT: not on the flood risk listHA4 0QH: not on the flood risk listHA4 0QS: not on the flood risk listHA4 0QT: not on the flood risk listHA4 0QU: not on the flood risk listHA4 0QX: not on the flood risk listHA4 0QY: not on the flood risk listHA4 0QZ: not on the flood risk listHA4 0RA: not on the flood risk listHA4 0RB: not on the flood risk listHA4 0RD: not on the flood risk listHA4 0RE: not on the flood risk listHA4 0RF: not on the flood risk listHA4 0RG: not on the flood risk listHA4 0RH: not on the flood risk listHA4 0RQ: not on the flood risk listHA4 0RT: not on the flood risk listHA4 0RU: not on the flood risk listHA4 0RX: not on the flood risk listHA4 0RY: not on the flood risk listHA4 0RZ: not on the flood risk listHA4 0SA: not on the flood risk listHA4 0SB: not on the flood risk listHA4 0SD: not on the flood risk listHA4 0SE: not on the flood risk listHA4 0SF: not on the flood risk listHA4 0SG: not on the flood risk listHA4 0SH: not on the flood risk listHA4 0SL: not on the flood risk listHA4 0SN: not on the flood risk listHA4 0SP: not on the flood risk listHA4 0SQ: not on the flood risk listHA4 0SR: not on the flood risk listHA4 0SW: not on the flood risk listHA4 0TA: not on the flood risk listHA4 0TF: not on the flood risk listHA4 0TG: not on the flood risk listHA4 0TH: not on the flood risk listHA4 0TJ: not on the flood risk listHA4 0TL: not on the flood risk listHA4 0TN: not on the flood risk listHA4 0TP: not on the flood risk listHA4 0TQ: not on the flood risk listHA4 0TR: not on the flood risk listHA4 0TS: not on the flood risk listHA4 0TW: not on the flood risk listHA4 0UB: not on the flood risk listHA4 0UD: not on the flood risk listHA4 0UE: not on the flood risk listHA4 0UF: not on the flood risk listHA4 0UG: not on the flood risk listHA4 0UH: not on the flood risk listHA4 0UJ: not on the flood risk listHA4 0UL: not on the flood risk listHA4 0UN: not on the flood risk listHA4 0UP: not on the flood risk listHA4 0UQ: not on the flood risk listHA4 0UR: not on the flood risk listHA4 0UT: not on the flood risk listHA4 0UU: not on the flood risk listHA4 0UW: not on the flood risk listHA4 0UX: not on the flood risk listHA4 0YP: not on the flood risk listHA4 0YS: not on the flood risk listHA4 0DB: low flood risk at worstHA4 0DD: low flood risk at worstHA4 0DG: low flood risk at worstHA4 0DP: low flood risk at worstHA4 0DR: low flood risk at worstHA4 0EL: low flood risk at worstHA4 0XT: low flood risk at worstHA4 0HS: low flood risk at worstHA4 0JQ: low flood risk at worstHA4 0JS: low flood risk at worstHA4 0LJ: low flood risk at worstHA4 0LP: low flood risk at worstHA4 0LT: low flood risk at worstHA4 0PB: low flood risk at worstHA4 0PD: low flood risk at worstHA4 0PE: low flood risk at worstHA4 0PH: low flood risk at worstHA4 0PJ: low flood risk at worstHA4 0PQ: low flood risk at worstHA4 0PU: low flood risk at worstHA4 0PW: low flood risk at worstHA4 0QB: low flood risk at worstHA4 0QE: low flood risk at worstHA4 0QF: low flood risk at worstHA4 0QL: low flood risk at worstHA4 0QN: low flood risk at worstHA4 0QQ: low flood risk at worstHA4 0TB: low flood risk at worstHA4 0AJ: medium flood risk at worstHA4 0DS: medium flood risk at worstHA4 0HQ: medium flood risk at worstHA4 0JH: medium flood risk at worstHA4 0JJ: medium flood risk at worstHA4 0LN: medium flood risk at worstHA4 0LR: medium flood risk at worstHA4 0PA: medium flood risk at worstHA4 0PF: medium flood risk at worstHA4 0PG: medium flood risk at worstHA4 0PN: medium flood risk at worstHA4 0PR: medium flood risk at worstHA4 0PX: medium flood risk at worstHA4 0QP: medium flood risk at worstHA4 0QR: medium flood risk at worstHA4 0RJ: medium flood risk at worstHA4 0TD: medium flood risk at worstHA4 0TE: medium flood risk at worstHA4 0DE: high flood riskHA4 0DF: high flood riskHA4 0JE: high flood riskHA4 0LS: high flood riskHA4 0NP: high flood risk South RuislipRuislip Manor 6 postcodes at high or medium risk, outlined: this goes to HA4 0JH, the one with most homes and businesses at high risk6 postcodes at high or medium risk5 postcodes at high or medium risk, outlined: this goes to HA4 0RJ, the one with most homes and businesses at high risk5 postcodes at high or medium risk Map of every postcode in the HA4 0 sector, by flood risk Of the 219 postcodes in the HA4 0 sector that ONS places, 5 have a home or business at high risk, 18 are at medium risk at worst, 28 are at low risk at worst and 168 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 6 postcodes at high or medium risk; 5 postcodes at high or medium risk. Places named: South Ruislip, Ruislip Manor. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. South RuislipRuislip Manor
  • A home or business at high risk: 5
  • At medium risk at worst: 18
  • At low risk at worst: 28
  • At very low risk only: 0
  • Not on the at-risk list: 168
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 219 postcodes in the HA4 0 sector that ONS places, 5 have a home or business at high risk, 18 are at medium risk at worst, 28 are at low risk at worst and 168 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. A dashed outline shows where 5 or more lie within 150 metres of each other. It is not a boundary, and 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 0NP5 at high riskHA4 0LS3 at high riskHA4 0DE1 at high riskHA4 0DF1 at high riskHA4 0JE1 at high risk

Where the postcodes at high or medium risk lie together

  • 6 postcodes at high or medium risk, outlined on the map. HA4 0JH, is the one with most homes and businesses at high risk.
  • 5 postcodes at high or medium risk, outlined on the map. HA4 0RJ, is the one with most homes and businesses at high risk.

What do homes sell for in HA4 0?

Homes in HA4 0 sold for a typical £565,875 in the 12 months to August 2026, across 86 sales, up 3.8% on the 12 months before, HM Land Registry's figures show.

£565,875 typical price, the 12 months to August 2026
£545,000 12 months to August 2025
▲ up 3.8% on the 12 months before
  • Detached 1 sale, too few to price
  • Semi-detached £620,000 25 sales
  • Terraced £573,625 46 sales
  • Flat or maisonette £362,500 14 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 0. 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 0

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 0AAHA4 0ABHA4 0AGHA4 0AHHA4 0AJHA4 0ALHA4 0ANHA4 0APHA4 0ARHA4 0ASHA4 0ATHA4 0AUHA4 0AWHA4 0AXHA4 0AYHA4 0AZHA4 0BAHA4 0BBHA4 0BDHA4 0BGHA4 0BHHA4 0BJHA4 0BNHA4 0BPHA4 0BSHA4 0BTHA4 0BUHA4 0BWHA4 0BXHA4 0BYHA4 0BZHA4 0DAHA4 0DBHA4 0DDHA4 0DEHA4 0DFHA4 0DGHA4 0DHHA4 0DJHA4 0DLHA4 0DNHA4 0DPHA4 0DQHA4 0DRHA4 0DSHA4 0DTHA4 0DWHA4 0EBHA4 0EDHA4 0EEHA4 0EFHA4 0EGHA4 0EHHA4 0EJHA4 0ELHA4 0EPHA4 0EQHA4 0ERHA4 0ESHA4 0ETHA4 0EUHA4 0EWHA4 0EXHA4 0EYHA4 0EZHA4 0FFHA4 0FYHA4 0GDHA4 0GEHA4 0GFHA4 0GHHA4 0HAHA4 0HBHA4 0HDHA4 0HGHA4 0HHHA4 0HJHA4 0HLHA4 0HNHA4 0HPHA4 0HQHA4 0HRHA4 0HSHA4 0HTHA4 0HUHA4 0HWHA4 0HXHA4 0HYHA4 0HZHA4 0JAHA4 0JBHA4 0JDHA4 0JEHA4 0JHHA4 0JJHA4 0JPHA4 0JQHA4 0JSHA4 0JWHA4 0LJHA4 0LNHA4 0LPHA4 0LRHA4 0LSHA4 0LTHA4 0LUHA4 0LXHA4 0LYHA4 0LZHA4 0NAHA4 0NBHA4 0NDHA4 0NFHA4 0NGHA4 0NHHA4 0NJHA4 0NLHA4 0NNHA4 0NPHA4 0NQHA4 0NRHA4 0NSHA4 0NTHA4 0NUHA4 0NWHA4 0PAHA4 0PBHA4 0PDHA4 0PEHA4 0PFHA4 0PGHA4 0PHHA4 0PJHA4 0PLHA4 0PNHA4 0PPHA4 0PQHA4 0PRHA4 0PSHA4 0PTHA4 0PUHA4 0PWHA4 0PXHA4 0QBHA4 0QEHA4 0QFHA4 0QHHA4 0QLHA4 0QNHA4 0QPHA4 0QQHA4 0QRHA4 0QSHA4 0QTHA4 0QUHA4 0QXHA4 0QYHA4 0QZHA4 0RAHA4 0RBHA4 0RDHA4 0REHA4 0RFHA4 0RGHA4 0RHHA4 0RJHA4 0RQHA4 0RTHA4 0RUHA4 0RXHA4 0RYHA4 0RZHA4 0SAHA4 0SBHA4 0SDHA4 0SEHA4 0SFHA4 0SGHA4 0SHHA4 0SLHA4 0SNHA4 0SPHA4 0SQHA4 0SRHA4 0SWHA4 0TAHA4 0TBHA4 0TDHA4 0TEHA4 0TFHA4 0TGHA4 0THHA4 0TJHA4 0TLHA4 0TNHA4 0TPHA4 0TQHA4 0TRHA4 0TSHA4 0TWHA4 0UBHA4 0UDHA4 0UEHA4 0UFHA4 0UGHA4 0UHHA4 0UJHA4 0ULHA4 0UNHA4 0UPHA4 0UQHA4 0URHA4 0UTHA4 0UUHA4 0UWHA4 0UXHA4 0XTHA4 0YPHA4 0YS

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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