AL5 4 postcode sector in the AL5 district

AL5 4 is a sector of the AL5 district: every postcode that starts AL5 4. It has 252 postcodes in use, 12 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 AL5 4 sector, and which are new since 2020

Map of every postcode in the AL5 4 sector, by new since 2020 Of the 252 postcodes in the AL5 4 sector that ONS places, 6 are new since 2020 and 246 were in use before 2020. One postcode lies beyond the edge and is listed under the map. Places named: Harpenden. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. AL5 4AA: before 2020AL5 4AB: before 2020AL5 4AD: before 2020AL5 4AE: before 2020AL5 4AF: before 2020AL5 4AG: before 2020AL5 4AH: before 2020AL5 4AJ: before 2020AL5 4AL: before 2020AL5 4AN: before 2020AL5 4AP: before 2020AL5 4AQ: before 2020AL5 4AR: before 2020AL5 4AS: before 2020AL5 4AT: before 2020AL5 4AU: before 2020AL5 4AW: before 2020AL5 4AX: before 2020AL5 4AY: before 2020AL5 4BA: before 2020AL5 4BB: before 2020AL5 4BD: before 2020AL5 4BE: before 2020AL5 4BG: before 2020AL5 4BH: before 2020AL5 4BJ: before 2020AL5 4BP: before 2020AL5 4BQ: before 2020AL5 4BS: before 2020AL5 4BT: before 2020AL5 4BU: before 2020AL5 4BW: before 2020AL5 4BX: before 2020AL5 4BZ: before 2020AL5 4DB: before 2020AL5 4DD: before 2020AL5 4DF: before 2020AL5 4DG: before 2020AL5 4DH: before 2020AL5 4DJ: before 2020AL5 4DN: before 2020AL5 4DQ: before 2020AL5 4DU: before 2020AL5 4DZ: before 2020AL5 4EA: before 2020AL5 4EB: before 2020AL5 4ED: before 2020AL5 4EE: before 2020AL5 4EF: before 2020AL5 4EG: before 2020AL5 4EL: before 2020AL5 4EP: before 2020AL5 4EQ: before 2020AL5 4ES: before 2020AL5 4ET: before 2020AL5 4EU: before 2020AL5 4EW: before 2020AL5 4EX: before 2020AL5 4EY: before 2020AL5 4EZ: before 2020AL5 4FB: before 2020AL5 4FE: before 2020AL5 4FF: before 2020AL5 4FG: before 2020AL5 4FH: before 2020AL5 4FJ: before 2020AL5 4FL: before 2020AL5 4FN: before 2020AL5 4FP: before 2020AL5 4FQ: before 2020AL5 4GA: before 2020AL5 4GB: before 2020AL5 4GJ: before 2020AL5 4GW: before 2020AL5 4GX: before 2020AL5 4GZ: before 2020AL5 4HA: before 2020AL5 4HB: before 2020AL5 4HD: before 2020AL5 4HE: before 2020AL5 4HF: before 2020AL5 4HG: before 2020AL5 4HH: before 2020AL5 4HJ: before 2020AL5 4HL: before 2020AL5 4HN: before 2020AL5 4HP: before 2020AL5 4HQ: before 2020AL5 4HR: before 2020AL5 4HS: before 2020AL5 4HT: before 2020AL5 4HW: before 2020AL5 4HX: before 2020AL5 4HY: before 2020AL5 4JA: before 2020AL5 4JB: before 2020AL5 4JD: before 2020AL5 4JE: before 2020AL5 4JF: before 2020AL5 4JN: before 2020AL5 4JP: before 2020AL5 4JR: before 2020AL5 4JS: before 2020AL5 4JT: before 2020AL5 4JU: before 2020AL5 4JW: before 2020AL5 4JX: before 2020AL5 4JY: before 2020AL5 4JZ: before 2020AL5 4LA: before 2020AL5 4LB: before 2020AL5 4LD: before 2020AL5 4LE: before 2020AL5 4LF: before 2020AL5 4LG: before 2020AL5 4LH: before 2020AL5 4LJ: before 2020AL5 4LL: before 2020AL5 4LN: before 2020AL5 4LP: before 2020AL5 4LQ: before 2020AL5 4LR: before 2020AL5 4LS: before 2020AL5 4LT: before 2020AL5 4LU: before 2020AL5 4LW: before 2020AL5 4LX: before 2020AL5 4LY: before 2020AL5 4LZ: before 2020AL5 4NA: before 2020AL5 4NB: before 2020AL5 4ND: before 2020AL5 4NF: before 2020AL5 4NG: before 2020AL5 4NH: before 2020AL5 4NL: before 2020AL5 4NQ: before 2020AL5 4NS: before 2020AL5 4NT: before 2020AL5 4NX: before 2020AL5 4NY: before 2020AL5 4NZ: before 2020AL5 4PA: before 2020AL5 4PB: before 2020AL5 4PD: before 2020AL5 4PE: before 2020AL5 4PF: before 2020AL5 4PG: before 2020AL5 4PH: before 2020AL5 4PJ: before 2020AL5 4PL: before 2020AL5 4PN: before 2020AL5 4PP: before 2020AL5 4PQ: before 2020AL5 4PR: before 2020AL5 4PT: before 2020AL5 4PW: before 2020AL5 4QA: before 2020AL5 4QB: before 2020AL5 4QD: before 2020AL5 4QE: before 2020AL5 4QF: before 2020AL5 4QG: before 2020AL5 4QH: before 2020AL5 4QJ: before 2020AL5 4QL: before 2020AL5 4QN: before 2020AL5 4QP: before 2020AL5 4QQ: before 2020AL5 4QR: before 2020AL5 4QS: before 2020AL5 4QT: before 2020AL5 4QU: before 2020AL5 4QW: before 2020AL5 4QX: before 2020AL5 4QY: before 2020AL5 4QZ: before 2020AL5 4RA: before 2020AL5 4RD: before 2020AL5 4RE: before 2020AL5 4RF: before 2020AL5 4RG: before 2020AL5 4RH: before 2020AL5 4RL: before 2020AL5 4RN: before 2020AL5 4RP: before 2020AL5 4RQ: before 2020AL5 4RR: before 2020AL5 4RU: before 2020AL5 4RW: before 2020AL5 4SA: before 2020AL5 4SD: before 2020AL5 4SE: before 2020AL5 4SJ: before 2020AL5 4SL: before 2020AL5 4SP: before 2020AL5 4SQ: before 2020AL5 4SS: before 2020AL5 4ST: before 2020AL5 4SU: before 2020AL5 4SW: before 2020AL5 4SX: before 2020AL5 4SY: before 2020AL5 4TA: before 2020AL5 4TB: before 2020AL5 4TD: before 2020AL5 4TE: before 2020AL5 4TF: before 2020AL5 4TG: before 2020AL5 4TH: before 2020AL5 4TJ: before 2020AL5 4TL: before 2020AL5 4TN: before 2020AL5 4TP: before 2020AL5 4TQ: before 2020AL5 4TR: before 2020AL5 4TS: before 2020AL5 4TT: before 2020AL5 4TU: before 2020AL5 4TW: before 2020AL5 4TX: before 2020AL5 4TY: before 2020AL5 4TZ: before 2020AL5 4UB: before 2020AL5 4UE: before 2020AL5 4UH: before 2020AL5 4UJ: before 2020AL5 4UL: before 2020AL5 4UN: before 2020AL5 4US: before 2020AL5 4UT: before 2020AL5 4UU: before 2020AL5 4UW: before 2020AL5 4UX: before 2020AL5 4UZ: before 2020AL5 4XA: before 2020AL5 4XB: before 2020AL5 4XD: before 2020AL5 4XE: before 2020AL5 4XF: before 2020AL5 4XG: before 2020AL5 4XH: before 2020AL5 4XS: before 2020AL5 4XT: before 2020AL5 4DE: new since 2020AL5 4FR: new since 2020AL5 4FS: new since 2020AL5 4FU: new since 2020AL5 4FW: new since 2020AL5 4FX: new since 2020 Harpenden Map of every postcode in the AL5 4 sector, by new since 2020 Of the 252 postcodes in the AL5 4 sector that ONS places, 6 are new since 2020 and 246 were in use before 2020. One postcode lies beyond the edge and is listed under the map. Places named: Harpenden. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Harpenden
  • New since 2020: 6
  • In use before 2020: 246

Of the 252 postcodes in the AL5 4 sector that ONS places, 6 are new since 2020 and 246 were in use before 2020.

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. New since 2020 means it came into use in January 2020 or later. 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; when each came into use: the same directory; 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

Further out, not drawn

This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.

What do homes sell for in AL5 4?

Homes in AL5 4 sold for a typical £792,500 in the 12 months to August 2026, across 78 sales, up 22.8% on the 12 months before, HM Land Registry's figures show.

£792,500 typical price, the 12 months to August 2026
£645,250 12 months to August 2025
▲ up 22.8% on the 12 months before
  • Detached £1,377,500 20 sales
  • Semi-detached £865,000 26 sales
  • Terraced £625,000 12 sales
  • Flat or maisonette £335,000 20 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 AL5 4. 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 AL5 4

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.

AL5 4AAAL5 4ABAL5 4ADAL5 4AEAL5 4AFAL5 4AGAL5 4AHAL5 4AJAL5 4ALAL5 4ANAL5 4APAL5 4AQAL5 4ARAL5 4ASAL5 4ATAL5 4AUAL5 4AWAL5 4AXAL5 4AYAL5 4BAAL5 4BBAL5 4BDAL5 4BEAL5 4BGAL5 4BHAL5 4BJAL5 4BPAL5 4BQAL5 4BSAL5 4BTAL5 4BUAL5 4BWAL5 4BXAL5 4BZAL5 4DBAL5 4DDAL5 4DEAL5 4DFAL5 4DGAL5 4DHAL5 4DJAL5 4DNAL5 4DQAL5 4DUAL5 4DZAL5 4EAAL5 4EBAL5 4EDAL5 4EEAL5 4EFAL5 4EGAL5 4ELAL5 4EPAL5 4EQAL5 4ESAL5 4ETAL5 4EUAL5 4EWAL5 4EXAL5 4EYAL5 4EZAL5 4FBAL5 4FEAL5 4FFAL5 4FGAL5 4FHAL5 4FJAL5 4FLAL5 4FNAL5 4FPAL5 4FQAL5 4FRAL5 4FSAL5 4FUAL5 4FWAL5 4FXAL5 4GAAL5 4GBAL5 4GJAL5 4GWAL5 4GXAL5 4GZAL5 4HAAL5 4HBAL5 4HDAL5 4HEAL5 4HFAL5 4HGAL5 4HHAL5 4HJAL5 4HLAL5 4HNAL5 4HPAL5 4HQAL5 4HRAL5 4HSAL5 4HTAL5 4HUAL5 4HWAL5 4HXAL5 4HYAL5 4JAAL5 4JBAL5 4JDAL5 4JEAL5 4JFAL5 4JNAL5 4JPAL5 4JRAL5 4JSAL5 4JTAL5 4JUAL5 4JWAL5 4JXAL5 4JYAL5 4JZAL5 4LAAL5 4LBAL5 4LDAL5 4LEAL5 4LFAL5 4LGAL5 4LHAL5 4LJAL5 4LLAL5 4LNAL5 4LPAL5 4LQAL5 4LRAL5 4LSAL5 4LTAL5 4LUAL5 4LWAL5 4LXAL5 4LYAL5 4LZAL5 4NAAL5 4NBAL5 4NDAL5 4NFAL5 4NGAL5 4NHAL5 4NLAL5 4NQAL5 4NSAL5 4NTAL5 4NXAL5 4NYAL5 4NZAL5 4PAAL5 4PBAL5 4PDAL5 4PEAL5 4PFAL5 4PGAL5 4PHAL5 4PJAL5 4PLAL5 4PNAL5 4PPAL5 4PQAL5 4PRAL5 4PTAL5 4PWAL5 4QAAL5 4QBAL5 4QDAL5 4QEAL5 4QFAL5 4QGAL5 4QHAL5 4QJAL5 4QLAL5 4QNAL5 4QPAL5 4QQAL5 4QRAL5 4QSAL5 4QTAL5 4QUAL5 4QWAL5 4QXAL5 4QYAL5 4QZAL5 4RAAL5 4RDAL5 4REAL5 4RFAL5 4RGAL5 4RHAL5 4RLAL5 4RNAL5 4RPAL5 4RQAL5 4RRAL5 4RUAL5 4RWAL5 4SAAL5 4SDAL5 4SEAL5 4SJAL5 4SLAL5 4SPAL5 4SQAL5 4SSAL5 4STAL5 4SUAL5 4SWAL5 4SXAL5 4SYAL5 4TAAL5 4TBAL5 4TDAL5 4TEAL5 4TFAL5 4TGAL5 4THAL5 4TJAL5 4TLAL5 4TNAL5 4TPAL5 4TQAL5 4TRAL5 4TSAL5 4TTAL5 4TUAL5 4TWAL5 4TXAL5 4TYAL5 4TZAL5 4UBAL5 4UEAL5 4UHAL5 4UJAL5 4ULAL5 4UNAL5 4USAL5 4UTAL5 4UUAL5 4UWAL5 4UXAL5 4UZAL5 4XAAL5 4XBAL5 4XDAL5 4XEAL5 4XFAL5 4XGAL5 4XHAL5 4XSAL5 4XTAL5 4ZJ

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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