AL1 4 postcode sector in the AL1 district

AL1 4 is a sector of the AL1 district: every postcode that starts AL1 4. It has 231 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 AL1 4 sector, by flood risk

Map of every postcode in the AL1 4 sector, by flood risk Of the 231 postcodes in the AL1 4 sector that ONS places, 231 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: St Albans. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. AL1 4AA: not on the flood risk listAL1 4AB: not on the flood risk listAL1 4AD: not on the flood risk listAL1 4AE: not on the flood risk listAL1 4AG: not on the flood risk listAL1 4AH: not on the flood risk listAL1 4AJ: not on the flood risk listAL1 4AL: not on the flood risk listAL1 4AN: not on the flood risk listAL1 4AP: not on the flood risk listAL1 4AQ: not on the flood risk listAL1 4AR: not on the flood risk listAL1 4AS: not on the flood risk listAL1 4AT: not on the flood risk listAL1 4AU: not on the flood risk listAL1 4AX: not on the flood risk listAL1 4BA: not on the flood risk listAL1 4BE: not on the flood risk listAL1 4BG: not on the flood risk listAL1 4BH: not on the flood risk listAL1 4BJ: not on the flood risk listAL1 4BL: not on the flood risk listAL1 4BN: not on the flood risk listAL1 4BP: not on the flood risk listAL1 4BQ: not on the flood risk listAL1 4BS: not on the flood risk listAL1 4BT: not on the flood risk listAL1 4BW: not on the flood risk listAL1 4BY: not on the flood risk listAL1 4DA: not on the flood risk listAL1 4DB: not on the flood risk listAL1 4DD: not on the flood risk listAL1 4DF: not on the flood risk listAL1 4DG: not on the flood risk listAL1 4DH: not on the flood risk listAL1 4DJ: not on the flood risk listAL1 4DL: not on the flood risk listAL1 4DN: not on the flood risk listAL1 4DP: not on the flood risk listAL1 4DQ: not on the flood risk listAL1 4DW: not on the flood risk listAL1 4DX: not on the flood risk listAL1 4DY: not on the flood risk listAL1 4DZ: not on the flood risk listAL1 4EA: not on the flood risk listAL1 4EB: not on the flood risk listAL1 4ED: not on the flood risk listAL1 4EE: not on the flood risk listAL1 4EF: not on the flood risk listAL1 4EJ: not on the flood risk listAL1 4EL: not on the flood risk listAL1 4EP: not on the flood risk listAL1 4ER: not on the flood risk listAL1 4ES: not on the flood risk listAL1 4ET: not on the flood risk listAL1 4EU: not on the flood risk listAL1 4EW: not on the flood risk listAL1 4EX: not on the flood risk listAL1 4EY: not on the flood risk listAL1 4EZ: not on the flood risk listAL1 4FH: not on the flood risk listAL1 4FJ: not on the flood risk listAL1 4FL: not on the flood risk listAL1 4FN: not on the flood risk listAL1 4FP: not on the flood risk listAL1 4GL: not on the flood risk listAL1 4HA: not on the flood risk listAL1 4HD: not on the flood risk listAL1 4HE: not on the flood risk listAL1 4HF: not on the flood risk listAL1 4HG: not on the flood risk listAL1 4HH: not on the flood risk listAL1 4HJ: not on the flood risk listAL1 4HL: not on the flood risk listAL1 4HN: not on the flood risk listAL1 4HQ: not on the flood risk listAL1 4HW: not on the flood risk listAL1 4HY: not on the flood risk listAL1 4JA: not on the flood risk listAL1 4JD: not on the flood risk listAL1 4JE: not on the flood risk listAL1 4JG: not on the flood risk listAL1 4JH: not on the flood risk listAL1 4JL: not on the flood risk listAL1 4JP: not on the flood risk listAL1 4JR: not on the flood risk listAL1 4JS: not on the flood risk listAL1 4JT: not on the flood risk listAL1 4JU: not on the flood risk listAL1 4JW: not on the flood risk listAL1 4JX: not on the flood risk listAL1 4JY: not on the flood risk listAL1 4JZ: not on the flood risk listAL1 4LA: not on the flood risk listAL1 4LB: not on the flood risk listAL1 4LE: not on the flood risk listAL1 4LF: not on the flood risk listAL1 4LG: not on the flood risk listAL1 4LH: not on the flood risk listAL1 4LJ: not on the flood risk listAL1 4LQ: not on the flood risk listAL1 4LR: not on the flood risk listAL1 4LS: not on the flood risk listAL1 4LU: not on the flood risk listAL1 4LW: not on the flood risk listAL1 4LX: not on the flood risk listAL1 4NE: not on the flood risk listAL1 4NF: not on the flood risk listAL1 4NG: not on the flood risk listAL1 4NH: not on the flood risk listAL1 4NJ: not on the flood risk listAL1 4NL: not on the flood risk listAL1 4NN: not on the flood risk listAL1 4NP: not on the flood risk listAL1 4NQ: not on the flood risk listAL1 4NR: not on the flood risk listAL1 4NS: not on the flood risk listAL1 4NT: not on the flood risk listAL1 4NU: not on the flood risk listAL1 4NW: not on the flood risk listAL1 4NX: not on the flood risk listAL1 4NY: not on the flood risk listAL1 4NZ: not on the flood risk listAL1 4PA: not on the flood risk listAL1 4PB: not on the flood risk listAL1 4PD: not on the flood risk listAL1 4PF: not on the flood risk listAL1 4PL: not on the flood risk listAL1 4PN: not on the flood risk listAL1 4PP: not on the flood risk listAL1 4PR: not on the flood risk listAL1 4PS: not on the flood risk listAL1 4PT: not on the flood risk listAL1 4PU: not on the flood risk listAL1 4PW: not on the flood risk listAL1 4PX: not on the flood risk listAL1 4PY: not on the flood risk listAL1 4PZ: not on the flood risk listAL1 4QA: not on the flood risk listAL1 4QB: not on the flood risk listAL1 4QD: not on the flood risk listAL1 4QE: not on the flood risk listAL1 4QF: not on the flood risk listAL1 4QG: not on the flood risk listAL1 4QH: not on the flood risk listAL1 4QJ: not on the flood risk listAL1 4QL: not on the flood risk listAL1 4QN: not on the flood risk listAL1 4QQ: not on the flood risk listAL1 4QR: not on the flood risk listAL1 4QU: not on the flood risk listAL1 4QW: not on the flood risk listAL1 4QX: not on the flood risk listAL1 4QY: not on the flood risk listAL1 4QZ: not on the flood risk listAL1 4RA: not on the flood risk listAL1 4RB: not on the flood risk listAL1 4RD: not on the flood risk listAL1 4RE: not on the flood risk listAL1 4RF: not on the flood risk listAL1 4RG: not on the flood risk listAL1 4RH: not on the flood risk listAL1 4RJ: not on the flood risk listAL1 4RL: not on the flood risk listAL1 4RQ: not on the flood risk listAL1 4RS: not on the flood risk listAL1 4RT: not on the flood risk listAL1 4RU: not on the flood risk listAL1 4RX: not on the flood risk listAL1 4RY: not on the flood risk listAL1 4RZ: not on the flood risk listAL1 4SA: not on the flood risk listAL1 4SB: not on the flood risk listAL1 4SD: not on the flood risk listAL1 4SE: not on the flood risk listAL1 4SF: not on the flood risk listAL1 4SG: not on the flood risk listAL1 4SH: not on the flood risk listAL1 4SJ: not on the flood risk listAL1 4SL: not on the flood risk listAL1 4SN: not on the flood risk listAL1 4SQ: not on the flood risk listAL1 4SU: not on the flood risk listAL1 4SW: not on the flood risk listAL1 4SY: not on the flood risk listAL1 4SZ: not on the flood risk listAL1 4TA: not on the flood risk listAL1 4TB: not on the flood risk listAL1 4TF: not on the flood risk listAL1 4TG: not on the flood risk listAL1 4TH: not on the flood risk listAL1 4TJ: not on the flood risk listAL1 4TL: not on the flood risk listAL1 4TN: not on the flood risk listAL1 4TP: not on the flood risk listAL1 4TQ: not on the flood risk listAL1 4TR: not on the flood risk listAL1 4TS: not on the flood risk listAL1 4TT: not on the flood risk listAL1 4TU: not on the flood risk listAL1 4TW: not on the flood risk listAL1 4TX: not on the flood risk listAL1 4TY: not on the flood risk listAL1 4TZ: not on the flood risk listAL1 4UA: not on the flood risk listAL1 4UB: not on the flood risk listAL1 4UD: not on the flood risk listAL1 4UE: not on the flood risk listAL1 4UN: not on the flood risk listAL1 4UR: not on the flood risk listAL1 4UT: not on the flood risk listAL1 4UU: not on the flood risk listAL1 4UX: not on the flood risk listAL1 4UZ: not on the flood risk listAL1 4XA: not on the flood risk listAL1 4XB: not on the flood risk listAL1 4XD: not on the flood risk listAL1 4XE: not on the flood risk listAL1 4XF: not on the flood risk listAL1 4XG: not on the flood risk listAL1 4XP: not on the flood risk listAL1 4XR: not on the flood risk listAL1 4XS: not on the flood risk listAL1 4XT: not on the flood risk listAL1 4XU: not on the flood risk listAL1 4XX: not on the flood risk listAL1 4XY: not on the flood risk listAL1 4XZ: not on the flood risk listAL1 4YA: not on the flood risk list St Albans Map of every postcode in the AL1 4 sector, by flood risk Of the 231 postcodes in the AL1 4 sector that ONS places, 231 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: St Albans. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. St Albans
  • 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: 231

Of the 231 postcodes in the AL1 4 sector that ONS places, 231 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.

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

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.

AL1 4ZG

What do homes sell for in AL1 4?

Homes in AL1 4 sold for a typical £742,500 in the 12 months to August 2026, across 106 sales, down 5.1% on the 12 months before, HM Land Registry's figures show.

£742,500 typical price, the 12 months to August 2026
£782,540 12 months to August 2025
▼ down 5.1% on the 12 months before
  • Detached £1,806,875 16 sales
  • Semi-detached £975,000 35 sales
  • Terraced £640,000 41 sales
  • Flat or maisonette £332,500 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 AL1 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 AL1 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.

AL1 4AAAL1 4ABAL1 4ADAL1 4AEAL1 4AGAL1 4AHAL1 4AJAL1 4ALAL1 4ANAL1 4APAL1 4AQAL1 4ARAL1 4ASAL1 4ATAL1 4AUAL1 4AXAL1 4BAAL1 4BEAL1 4BGAL1 4BHAL1 4BJAL1 4BLAL1 4BNAL1 4BPAL1 4BQAL1 4BSAL1 4BTAL1 4BWAL1 4BYAL1 4DAAL1 4DBAL1 4DDAL1 4DFAL1 4DGAL1 4DHAL1 4DJAL1 4DLAL1 4DNAL1 4DPAL1 4DQAL1 4DSAL1 4DWAL1 4DXAL1 4DYAL1 4DZAL1 4EAAL1 4EBAL1 4EDAL1 4EEAL1 4EFAL1 4EJAL1 4ELAL1 4EPAL1 4ERAL1 4ESAL1 4ETAL1 4EUAL1 4EWAL1 4EXAL1 4EYAL1 4EZAL1 4FHAL1 4FJAL1 4FLAL1 4FNAL1 4FPAL1 4GLAL1 4HAAL1 4HDAL1 4HEAL1 4HFAL1 4HGAL1 4HHAL1 4HJAL1 4HLAL1 4HNAL1 4HQAL1 4HWAL1 4HYAL1 4JAAL1 4JDAL1 4JEAL1 4JGAL1 4JHAL1 4JLAL1 4JPAL1 4JRAL1 4JSAL1 4JTAL1 4JUAL1 4JWAL1 4JXAL1 4JYAL1 4JZAL1 4LAAL1 4LBAL1 4LEAL1 4LFAL1 4LGAL1 4LHAL1 4LJAL1 4LQAL1 4LRAL1 4LSAL1 4LUAL1 4LWAL1 4LXAL1 4NEAL1 4NFAL1 4NGAL1 4NHAL1 4NJAL1 4NLAL1 4NNAL1 4NPAL1 4NQAL1 4NRAL1 4NSAL1 4NTAL1 4NUAL1 4NWAL1 4NXAL1 4NYAL1 4NZAL1 4PAAL1 4PBAL1 4PDAL1 4PFAL1 4PLAL1 4PNAL1 4PPAL1 4PRAL1 4PSAL1 4PTAL1 4PUAL1 4PWAL1 4PXAL1 4PYAL1 4PZAL1 4QAAL1 4QBAL1 4QDAL1 4QEAL1 4QFAL1 4QGAL1 4QHAL1 4QJAL1 4QLAL1 4QNAL1 4QQAL1 4QRAL1 4QUAL1 4QWAL1 4QXAL1 4QYAL1 4QZAL1 4RAAL1 4RBAL1 4RDAL1 4REAL1 4RFAL1 4RGAL1 4RHAL1 4RJAL1 4RLAL1 4RQAL1 4RSAL1 4RTAL1 4RUAL1 4RXAL1 4RYAL1 4RZAL1 4SAAL1 4SBAL1 4SDAL1 4SEAL1 4SFAL1 4SGAL1 4SHAL1 4SJAL1 4SLAL1 4SNAL1 4SQAL1 4SUAL1 4SWAL1 4SYAL1 4SZAL1 4TAAL1 4TBAL1 4TFAL1 4TGAL1 4THAL1 4TJAL1 4TLAL1 4TNAL1 4TPAL1 4TQAL1 4TRAL1 4TSAL1 4TTAL1 4TUAL1 4TWAL1 4TXAL1 4TYAL1 4TZAL1 4UAAL1 4UBAL1 4UDAL1 4UEAL1 4UNAL1 4URAL1 4UTAL1 4UUAL1 4UXAL1 4UZAL1 4XAAL1 4XBAL1 4XDAL1 4XEAL1 4XFAL1 4XGAL1 4XPAL1 4XRAL1 4XSAL1 4XTAL1 4XUAL1 4XXAL1 4XYAL1 4XZAL1 4YAAL1 4ZG

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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