AL5 1 postcode sector in the AL5 district

AL5 1 is a sector of the AL5 district: every postcode that starts AL5 1. It has 192 postcodes in use, 4 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 1 sector, by flood risk

Map of every postcode in the AL5 1 sector, by flood risk Of the 192 postcodes in the AL5 1 sector that ONS places, 192 are not on the Environment Agency's at-risk list. 2 postcodes lie beyond the edge and are listed under the map. Places named: Harpenden South, Harpenden West. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A1081 AL5 1AA: not on the flood risk listAL5 1AB: not on the flood risk listAL5 1AD: not on the flood risk listAL5 1AF: not on the flood risk listAL5 1AG: not on the flood risk listAL5 1AJ: not on the flood risk listAL5 1AL: not on the flood risk listAL5 1AP: not on the flood risk listAL5 1AQ: not on the flood risk listAL5 1AS: not on the flood risk listAL5 1AU: not on the flood risk listAL5 1AW: not on the flood risk listAL5 1AX: not on the flood risk listAL5 1AY: not on the flood risk listAL5 1BA: not on the flood risk listAL5 1BB: not on the flood risk listAL5 1BD: not on the flood risk listAL5 1BE: not on the flood risk listAL5 1BG: not on the flood risk listAL5 1BH: not on the flood risk listAL5 1BJ: not on the flood risk listAL5 1BL: not on the flood risk listAL5 1BN: not on the flood risk listAL5 1BP: not on the flood risk listAL5 1BQ: not on the flood risk listAL5 1BS: not on the flood risk listAL5 1BT: not on the flood risk listAL5 1BU: not on the flood risk listAL5 1BW: not on the flood risk listAL5 1BX: not on the flood risk listAL5 1BY: not on the flood risk listAL5 1BZ: not on the flood risk listAL5 1DA: not on the flood risk listAL5 1DB: not on the flood risk listAL5 1DD: not on the flood risk listAL5 1DE: not on the flood risk listAL5 1DF: not on the flood risk listAL5 1DG: not on the flood risk listAL5 1DH: not on the flood risk listAL5 1DJ: not on the flood risk listAL5 1DL: not on the flood risk listAL5 1DN: not on the flood risk listAL5 1DP: not on the flood risk listAL5 1DQ: not on the flood risk listAL5 1DR: not on the flood risk listAL5 1DT: not on the flood risk listAL5 1DW: not on the flood risk listAL5 1DY: not on the flood risk listAL5 1DZ: not on the flood risk listAL5 1EA: not on the flood risk listAL5 1EB: not on the flood risk listAL5 1EF: not on the flood risk listAL5 1EG: not on the flood risk listAL5 1EJ: not on the flood risk listAL5 1EL: not on the flood risk listAL5 1EN: not on the flood risk listAL5 1EP: not on the flood risk listAL5 1EQ: not on the flood risk listAL5 1ER: not on the flood risk listAL5 1ES: not on the flood risk listAL5 1ET: not on the flood risk listAL5 1EU: not on the flood risk listAL5 1EW: not on the flood risk listAL5 1EX: not on the flood risk listAL5 1EY: not on the flood risk listAL5 1EZ: not on the flood risk listAL5 1FA: not on the flood risk listAL5 1FB: not on the flood risk listAL5 1GD: not on the flood risk listAL5 1HA: not on the flood risk listAL5 1HB: not on the flood risk listAL5 1HD: not on the flood risk listAL5 1HE: not on the flood risk listAL5 1HF: not on the flood risk listAL5 1HG: not on the flood risk listAL5 1HH: not on the flood risk listAL5 1HJ: not on the flood risk listAL5 1HL: not on the flood risk listAL5 1HN: not on the flood risk listAL5 1HQ: not on the flood risk listAL5 1JA: not on the flood risk listAL5 1JB: not on the flood risk listAL5 1JD: not on the flood risk listAL5 1JE: not on the flood risk listAL5 1JF: not on the flood risk listAL5 1JG: not on the flood risk listAL5 1JH: not on the flood risk listAL5 1JJ: not on the flood risk listAL5 1JL: not on the flood risk listAL5 1JN: not on the flood risk listAL5 1JP: not on the flood risk listAL5 1JQ: not on the flood risk listAL5 1JR: not on the flood risk listAL5 1JS: not on the flood risk listAL5 1JU: not on the flood risk listAL5 1JW: not on the flood risk listAL5 1JX: not on the flood risk listAL5 1JY: not on the flood risk listAL5 1LG: not on the flood risk listAL5 1LH: not on the flood risk listAL5 1LJ: not on the flood risk listAL5 1LL: not on the flood risk listAL5 1LN: not on the flood risk listAL5 1LP: not on the flood risk listAL5 1LQ: not on the flood risk listAL5 1LR: not on the flood risk listAL5 1LS: not on the flood risk listAL5 1LT: not on the flood risk listAL5 1LU: not on the flood risk listAL5 1LW: not on the flood risk listAL5 1LX: not on the flood risk listAL5 1LZ: not on the flood risk listAL5 1NA: not on the flood risk listAL5 1NB: not on the flood risk listAL5 1ND: not on the flood risk listAL5 1NE: not on the flood risk listAL5 1NF: not on the flood risk listAL5 1NG: not on the flood risk listAL5 1NL: not on the flood risk listAL5 1NQ: not on the flood risk listAL5 1NY: not on the flood risk listAL5 1PA: not on the flood risk listAL5 1PD: not on the flood risk listAL5 1PF: not on the flood risk listAL5 1PG: not on the flood risk listAL5 1PQ: not on the flood risk listAL5 1PR: not on the flood risk listAL5 1PS: not on the flood risk listAL5 1PU: not on the flood risk listAL5 1PW: not on the flood risk listAL5 1PX: not on the flood risk listAL5 1PY: not on the flood risk listAL5 1QA: not on the flood risk listAL5 1QB: not on the flood risk listAL5 1QD: not on the flood risk listAL5 1QE: not on the flood risk listAL5 1QF: not on the flood risk listAL5 1QG: not on the flood risk listAL5 1QH: not on the flood risk listAL5 1QJ: not on the flood risk listAL5 1QL: not on the flood risk listAL5 1QN: not on the flood risk listAL5 1QP: not on the flood risk listAL5 1QQ: not on the flood risk listAL5 1QR: not on the flood risk listAL5 1QU: not on the flood risk listAL5 1QW: not on the flood risk listAL5 1QX: not on the flood risk listAL5 1QY: not on the flood risk listAL5 1RB: not on the flood risk listAL5 1RD: not on the flood risk listAL5 1RE: not on the flood risk listAL5 1RF: not on the flood risk listAL5 1RG: not on the flood risk listAL5 1RH: not on the flood risk listAL5 1RJ: not on the flood risk listAL5 1RL: not on the flood risk listAL5 1RN: not on the flood risk listAL5 1RP: not on the flood risk listAL5 1RQ: not on the flood risk listAL5 1RR: not on the flood risk listAL5 1RS: not on the flood risk listAL5 1RT: not on the flood risk listAL5 1RU: not on the flood risk listAL5 1RW: not on the flood risk listAL5 1RZ: not on the flood risk listAL5 1SD: not on the flood risk listAL5 1SE: not on the flood risk listAL5 1SF: not on the flood risk listAL5 1SG: not on the flood risk listAL5 1SH: not on the flood risk listAL5 1SJ: not on the flood risk listAL5 1SL: not on the flood risk listAL5 1SN: not on the flood risk listAL5 1SP: not on the flood risk listAL5 1SQ: not on the flood risk listAL5 1SR: not on the flood risk listAL5 1SS: not on the flood risk listAL5 1ST: not on the flood risk listAL5 1SU: not on the flood risk listAL5 1SW: not on the flood risk listAL5 1SX: not on the flood risk listAL5 1SY: not on the flood risk listAL5 1SZ: not on the flood risk listAL5 1TA: not on the flood risk listAL5 1TB: not on the flood risk listAL5 1TD: not on the flood risk listAL5 1TE: not on the flood risk listAL5 1TH: not on the flood risk list Harpenden SouthHarpenden West Map of every postcode in the AL5 1 sector, by flood risk Of the 192 postcodes in the AL5 1 sector that ONS places, 192 are not on the Environment Agency's at-risk list. 2 postcodes lie beyond the edge and are listed under the map. Places named: Harpenden South, Harpenden West. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Harpenden SouthHarpenden West
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 192

Of the 192 postcodes in the AL5 1 sector that ONS places, 192 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

2 further out, not drawn

These postcodes lie well apart from the rest, so the map is drawn without them to show the rest closer; they are in every count.

AL5 1ANAL5 1GZ

What do homes sell for in AL5 1?

Homes in AL5 1 sold for a typical £735,000 in the 12 months to August 2026, across 72 sales, up 9.7% on the 12 months before, HM Land Registry's figures show.

£735,000 typical price, the 12 months to August 2026
£670,000 12 months to August 2025
▲ up 9.7% on the 12 months before
  • Detached £940,000 19 sales
  • Semi-detached £795,000 23 sales
  • Terraced £605,000 18 sales
  • Flat or maisonette £258,500 12 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 1. 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 1

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 1AAAL5 1ABAL5 1ADAL5 1AFAL5 1AGAL5 1AJAL5 1ALAL5 1ANAL5 1APAL5 1AQAL5 1ASAL5 1AUAL5 1AWAL5 1AXAL5 1AYAL5 1BAAL5 1BBAL5 1BDAL5 1BEAL5 1BGAL5 1BHAL5 1BJAL5 1BLAL5 1BNAL5 1BPAL5 1BQAL5 1BSAL5 1BTAL5 1BUAL5 1BWAL5 1BXAL5 1BYAL5 1BZAL5 1DAAL5 1DBAL5 1DDAL5 1DEAL5 1DFAL5 1DGAL5 1DHAL5 1DJAL5 1DLAL5 1DNAL5 1DPAL5 1DQAL5 1DRAL5 1DTAL5 1DWAL5 1DYAL5 1DZAL5 1EAAL5 1EBAL5 1EFAL5 1EGAL5 1EHAL5 1EJAL5 1ELAL5 1ENAL5 1EPAL5 1EQAL5 1ERAL5 1ESAL5 1ETAL5 1EUAL5 1EWAL5 1EXAL5 1EYAL5 1EZAL5 1FAAL5 1FBAL5 1GDAL5 1GZAL5 1HAAL5 1HBAL5 1HDAL5 1HEAL5 1HFAL5 1HGAL5 1HHAL5 1HJAL5 1HLAL5 1HNAL5 1HQAL5 1JAAL5 1JBAL5 1JDAL5 1JEAL5 1JFAL5 1JGAL5 1JHAL5 1JJAL5 1JLAL5 1JNAL5 1JPAL5 1JQAL5 1JRAL5 1JSAL5 1JUAL5 1JWAL5 1JXAL5 1JYAL5 1LGAL5 1LHAL5 1LJAL5 1LLAL5 1LNAL5 1LPAL5 1LQAL5 1LRAL5 1LSAL5 1LTAL5 1LUAL5 1LWAL5 1LXAL5 1LZAL5 1NAAL5 1NBAL5 1NDAL5 1NEAL5 1NFAL5 1NGAL5 1NLAL5 1NQAL5 1NYAL5 1PAAL5 1PDAL5 1PFAL5 1PGAL5 1PQAL5 1PRAL5 1PSAL5 1PUAL5 1PWAL5 1PXAL5 1PYAL5 1QAAL5 1QBAL5 1QDAL5 1QEAL5 1QFAL5 1QGAL5 1QHAL5 1QJAL5 1QLAL5 1QNAL5 1QPAL5 1QQAL5 1QRAL5 1QUAL5 1QWAL5 1QXAL5 1QYAL5 1RBAL5 1RDAL5 1REAL5 1RFAL5 1RGAL5 1RHAL5 1RJAL5 1RLAL5 1RNAL5 1RPAL5 1RQAL5 1RRAL5 1RSAL5 1RTAL5 1RUAL5 1RWAL5 1RZAL5 1SDAL5 1SEAL5 1SFAL5 1SGAL5 1SHAL5 1SJAL5 1SLAL5 1SNAL5 1SPAL5 1SQAL5 1SRAL5 1SSAL5 1STAL5 1SUAL5 1SWAL5 1SXAL5 1SYAL5 1SZAL5 1TAAL5 1TBAL5 1TDAL5 1TEAL5 1TH

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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