AL4 8 postcode sector in the AL4 district

AL4 8 is a sector of the AL4 district: every postcode that starts AL4 8. It has 209 postcodes in use, 3 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 AL4 8 sector, by flood risk

Map of every postcode in the AL4 8 sector, by flood risk Of the 209 postcodes in the AL4 8 sector that ONS places, 10 have a home or business at high risk, 3 are at low risk at worst, 1 are at very low risk only and 195 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. Places named: St Albans, Harpenden, Hatfield, Wheathampstead. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. A1081A1057A1(M)A5183 AL4 8AD: not on the flood risk listAL4 8AE: not on the flood risk listAL4 8AG: not on the flood risk listAL4 8AH: not on the flood risk listAL4 8AJ: not on the flood risk listAL4 8AL: not on the flood risk listAL4 8AN: not on the flood risk listAL4 8AP: not on the flood risk listAL4 8AS: not on the flood risk listAL4 8AT: not on the flood risk listAL4 8AW: not on the flood risk listAL4 8AX: not on the flood risk listAL4 8AY: not on the flood risk listAL4 8BA: not on the flood risk listAL4 8BB: not on the flood risk listAL4 8BE: not on the flood risk listAL4 8BG: not on the flood risk listAL4 8BJ: not on the flood risk listAL4 8BL: not on the flood risk listAL4 8BT: not on the flood risk listAL4 8BW: not on the flood risk listAL4 8BY: not on the flood risk listAL4 8DB: not on the flood risk listAL4 8DD: not on the flood risk listAL4 8DG: not on the flood risk listAL4 8DJ: not on the flood risk listAL4 8DP: not on the flood risk listAL4 8DX: not on the flood risk listAL4 8DY: not on the flood risk listAL4 8DZ: not on the flood risk listAL4 8EA: not on the flood risk listAL4 8EB: not on the flood risk listAL4 8ED: not on the flood risk listAL4 8EE: not on the flood risk listAL4 8EG: not on the flood risk listAL4 8EJ: not on the flood risk listAL4 8EL: not on the flood risk listAL4 8EN: not on the flood risk listAL4 8EP: not on the flood risk listAL4 8EQ: not on the flood risk listAL4 8ER: not on the flood risk listAL4 8ES: not on the flood risk listAL4 8ET: not on the flood risk listAL4 8EU: not on the flood risk listAL4 8EW: not on the flood risk listAL4 8EX: not on the flood risk listAL4 8EY: not on the flood risk listAL4 8EZ: not on the flood risk listAL4 8FB: not on the flood risk listAL4 8FD: not on the flood risk listAL4 8FE: not on the flood risk listAL4 8FG: not on the flood risk listAL4 8FH: not on the flood risk listAL4 8FN: not on the flood risk listAL4 8GB: not on the flood risk listAL4 8GD: not on the flood risk listAL4 8HA: not on the flood risk listAL4 8HD: not on the flood risk listAL4 8HE: not on the flood risk listAL4 8HF: not on the flood risk listAL4 8HJ: not on the flood risk listAL4 8HN: not on the flood risk listAL4 8HP: not on the flood risk listAL4 8HR: not on the flood risk listAL4 8HS: not on the flood risk listAL4 8HT: not on the flood risk listAL4 8HU: not on the flood risk listAL4 8HX: not on the flood risk listAL4 8HY: not on the flood risk listAL4 8HZ: not on the flood risk listAL4 8JA: not on the flood risk listAL4 8JB: not on the flood risk listAL4 8JD: not on the flood risk listAL4 8JE: not on the flood risk listAL4 8JF: not on the flood risk listAL4 8JG: not on the flood risk listAL4 8JN: not on the flood risk listAL4 8JQ: not on the flood risk listAL4 8JZ: not on the flood risk listAL4 8LA: not on the flood risk listAL4 8LB: not on the flood risk listAL4 8LD: not on the flood risk listAL4 8LE: not on the flood risk listAL4 8LF: not on the flood risk listAL4 8LG: not on the flood risk listAL4 8LH: not on the flood risk listAL4 8LJ: not on the flood risk listAL4 8LL: not on the flood risk listAL4 8LN: not on the flood risk listAL4 8LP: not on the flood risk listAL4 8LQ: not on the flood risk listAL4 8LR: not on the flood risk listAL4 8LS: not on the flood risk listAL4 8LT: not on the flood risk listAL4 8LU: not on the flood risk listAL4 8LW: not on the flood risk listAL4 8LX: not on the flood risk listAL4 8LY: not on the flood risk listAL4 8LZ: not on the flood risk listAL4 8ND: not on the flood risk listAL4 8NG: not on the flood risk listAL4 8NH: not on the flood risk listAL4 8NN: not on the flood risk listAL4 8NP: not on the flood risk listAL4 8NQ: not on the flood risk listAL4 8NR: not on the flood risk listAL4 8NS: not on the flood risk listAL4 8NU: not on the flood risk listAL4 8NW: not on the flood risk listAL4 8NX: not on the flood risk listAL4 8NY: not on the flood risk listAL4 8NZ: not on the flood risk listAL4 8PA: not on the flood risk listAL4 8PB: not on the flood risk listAL4 8PD: not on the flood risk listAL4 8PE: not on the flood risk listAL4 8PF: not on the flood risk listAL4 8PG: not on the flood risk listAL4 8PL: not on the flood risk listAL4 8PP: not on the flood risk listAL4 8PR: not on the flood risk listAL4 8PU: not on the flood risk listAL4 8PX: not on the flood risk listAL4 8PZ: not on the flood risk listAL4 8QB: not on the flood risk listAL4 8QE: not on the flood risk listAL4 8QF: not on the flood risk listAL4 8QG: not on the flood risk listAL4 8QH: not on the flood risk listAL4 8QJ: not on the flood risk listAL4 8QZ: not on the flood risk listAL4 8RA: not on the flood risk listAL4 8RB: not on the flood risk listAL4 8RD: not on the flood risk listAL4 8RE: not on the flood risk listAL4 8RG: not on the flood risk listAL4 8RH: not on the flood risk listAL4 8RJ: not on the flood risk listAL4 8RL: not on the flood risk listAL4 8RN: not on the flood risk listAL4 8RP: not on the flood risk listAL4 8RQ: not on the flood risk listAL4 8RR: not on the flood risk listAL4 8RS: not on the flood risk listAL4 8RT: not on the flood risk listAL4 8RU: not on the flood risk listAL4 8RW: not on the flood risk listAL4 8RX: not on the flood risk listAL4 8RY: not on the flood risk listAL4 8RZ: not on the flood risk listAL4 8SA: not on the flood risk listAL4 8TA: not on the flood risk listAL4 8TB: not on the flood risk listAL4 8TD: not on the flood risk listAL4 8TE: not on the flood risk listAL4 8TF: not on the flood risk listAL4 8TG: not on the flood risk listAL4 8TH: not on the flood risk listAL4 8TJ: not on the flood risk listAL4 8TL: not on the flood risk listAL4 8TN: not on the flood risk listAL4 8TP: not on the flood risk listAL4 8TR: not on the flood risk listAL4 8TS: not on the flood risk listAL4 8TU: not on the flood risk listAL4 8TW: not on the flood risk listAL4 8XG: not on the flood risk listAL4 8JJ: very low flood risk onlyAL4 8SB: low flood risk at worstAL4 8DF: low flood risk at worstAL4 8HQ: low flood risk at worstAL4 8AA: high flood riskAL4 8BS: high flood riskAL4 8BU: high flood riskAL4 8BZ: high flood riskAL4 8EF: high flood riskAL4 8FJ: high flood riskAL4 8HH: high flood riskAL4 8HW: high flood riskAL4 8NJ: high flood risk St AlbansHarpendenHatfieldWheathampstead 5 postcodes at high or medium risk, outlined: this goes to AL4 8DT, the one with most homes and businesses at high risk5 postcodes at high or medium risk Map of every postcode in the AL4 8 sector, by flood risk Of the 209 postcodes in the AL4 8 sector that ONS places, 10 have a home or business at high risk, 3 are at low risk at worst, 1 are at very low risk only and 195 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. Places named: St Albans, Wheathampstead. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. A1081A1057 St AlbansWheathampstead
  • A home or business at high risk: 10
  • At medium risk at worst: 0
  • At low risk at worst: 3
  • At very low risk only: 1
  • Not on the at-risk list: 195
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 209 postcodes in the AL4 8 sector that ONS places, 10 have a home or business at high risk, 3 are at low risk at worst, 1 are at very low risk only and 195 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 170 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.

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.

AL4 8DT11 at high riskAL4 8AA8 at high riskAL4 8BU5 at high riskAL4 8HW2 at high riskAL4 8BS1 at high riskAL4 8BZ1 at high riskAL4 8EF1 at high riskAL4 8FJ1 at high riskAL4 8HH1 at high riskAL4 8NJ1 at high risk

Where the postcodes at high or medium risk lie together

  • 5 postcodes at high or medium risk, outlined on the map. AL4 8DT, is the one with most homes and businesses at high risk.

What do homes sell for in AL4 8?

Homes in AL4 8 sold for a typical £725,000 in the 12 months to August 2026, across 77 sales, up 2.8% on the 12 months before, HM Land Registry's figures show.

£725,000 typical price, the 12 months to August 2026
£705,000 12 months to August 2025
▲ up 2.8% on the 12 months before
  • Detached £1,000,000 29 sales
  • Semi-detached £720,000 25 sales
  • Terraced £469,167 16 sales
  • Flat or maisonette £350,000 7 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 AL4 8. 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 AL4 8

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.

AL4 8AAAL4 8ADAL4 8AEAL4 8AFAL4 8AGAL4 8AHAL4 8AJAL4 8ALAL4 8ANAL4 8APAL4 8AQAL4 8ARAL4 8ASAL4 8ATAL4 8AUAL4 8AWAL4 8AXAL4 8AYAL4 8BAAL4 8BBAL4 8BDAL4 8BEAL4 8BGAL4 8BHAL4 8BJAL4 8BLAL4 8BNAL4 8BPAL4 8BQAL4 8BSAL4 8BTAL4 8BUAL4 8BWAL4 8BXAL4 8BYAL4 8BZAL4 8DAAL4 8DBAL4 8DDAL4 8DEAL4 8DFAL4 8DGAL4 8DJAL4 8DLAL4 8DNAL4 8DPAL4 8DTAL4 8DWAL4 8DXAL4 8DYAL4 8DZAL4 8EAAL4 8EBAL4 8EDAL4 8EEAL4 8EFAL4 8EGAL4 8EJAL4 8ELAL4 8ENAL4 8EPAL4 8EQAL4 8ERAL4 8ESAL4 8ETAL4 8EUAL4 8EWAL4 8EXAL4 8EYAL4 8EZAL4 8FBAL4 8FDAL4 8FEAL4 8FFAL4 8FGAL4 8FHAL4 8FJAL4 8FLAL4 8FNAL4 8GBAL4 8GDAL4 8HAAL4 8HDAL4 8HEAL4 8HFAL4 8HHAL4 8HJAL4 8HLAL4 8HNAL4 8HPAL4 8HQAL4 8HRAL4 8HSAL4 8HTAL4 8HUAL4 8HWAL4 8HXAL4 8HYAL4 8HZAL4 8JAAL4 8JBAL4 8JDAL4 8JEAL4 8JFAL4 8JGAL4 8JHAL4 8JJAL4 8JNAL4 8JQAL4 8JZAL4 8LAAL4 8LBAL4 8LDAL4 8LEAL4 8LFAL4 8LGAL4 8LHAL4 8LJAL4 8LLAL4 8LNAL4 8LPAL4 8LQAL4 8LRAL4 8LSAL4 8LTAL4 8LUAL4 8LWAL4 8LXAL4 8LYAL4 8LZAL4 8NDAL4 8NGAL4 8NHAL4 8NJAL4 8NNAL4 8NPAL4 8NQAL4 8NRAL4 8NSAL4 8NTAL4 8NUAL4 8NWAL4 8NXAL4 8NYAL4 8NZAL4 8PAAL4 8PBAL4 8PDAL4 8PEAL4 8PFAL4 8PGAL4 8PLAL4 8PPAL4 8PRAL4 8PSAL4 8PUAL4 8PWAL4 8PXAL4 8PZAL4 8QAAL4 8QBAL4 8QDAL4 8QEAL4 8QFAL4 8QGAL4 8QHAL4 8QJAL4 8QLAL4 8QQAL4 8QZAL4 8RAAL4 8RBAL4 8RDAL4 8REAL4 8RGAL4 8RHAL4 8RJAL4 8RLAL4 8RNAL4 8RPAL4 8RQAL4 8RRAL4 8RSAL4 8RTAL4 8RUAL4 8RWAL4 8RXAL4 8RYAL4 8RZAL4 8SAAL4 8SBAL4 8TAAL4 8TBAL4 8TDAL4 8TEAL4 8TFAL4 8TGAL4 8THAL4 8TJAL4 8TLAL4 8TNAL4 8TPAL4 8TQAL4 8TRAL4 8TSAL4 8TTAL4 8TUAL4 8TWAL4 8XG

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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