AL2 1 postcode sector in the AL2 district

AL2 1 is a sector of the AL2 district: every postcode that starts AL2 1. It has 248 postcodes in use, 5 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 AL2 1 sector, by flood risk

Map of every postcode in the AL2 1 sector, by flood risk Of the 248 postcodes in the AL2 1 sector that ONS places, 22 have a home or business at high risk, 7 are at medium risk at worst, 12 are at low risk at worst and 207 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 10 postcodes at high or medium risk; 8 postcodes at high or medium risk. One postcode lies beyond the edge and is listed under the map. Places named: London Colney. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A1081A414 AL2 1AB: not on the flood risk listAL2 1AE: not on the flood risk listAL2 1AF: not on the flood risk listAL2 1AG: not on the flood risk listAL2 1AJ: not on the flood risk listAL2 1AP: not on the flood risk listAL2 1AT: not on the flood risk listAL2 1AU: not on the flood risk listAL2 1AW: not on the flood risk listAL2 1BH: not on the flood risk listAL2 1BL: not on the flood risk listAL2 1BP: not on the flood risk listAL2 1BS: not on the flood risk listAL2 1BT: not on the flood risk listAL2 1BU: not on the flood risk listAL2 1BW: not on the flood risk listAL2 1BX: not on the flood risk listAL2 1DA: not on the flood risk listAL2 1DE: not on the flood risk listAL2 1DF: not on the flood risk listAL2 1DH: not on the flood risk listAL2 1DJ: not on the flood risk listAL2 1DN: not on the flood risk listAL2 1DR: not on the flood risk listAL2 1DZ: not on the flood risk listAL2 1EA: not on the flood risk listAL2 1EB: not on the flood risk listAL2 1ED: not on the flood risk listAL2 1EE: not on the flood risk listAL2 1EF: not on the flood risk listAL2 1EG: not on the flood risk listAL2 1EH: not on the flood risk listAL2 1EJ: not on the flood risk listAL2 1EN: not on the flood risk listAL2 1EP: not on the flood risk listAL2 1EQ: not on the flood risk listAL2 1ER: not on the flood risk listAL2 1ES: not on the flood risk listAL2 1ET: not on the flood risk listAL2 1EU: not on the flood risk listAL2 1EW: not on the flood risk listAL2 1EY: not on the flood risk listAL2 1EZ: not on the flood risk listAL2 1FB: not on the flood risk listAL2 1FD: not on the flood risk listAL2 1FE: not on the flood risk listAL2 1FG: not on the flood risk listAL2 1FH: not on the flood risk listAL2 1FN: not on the flood risk listAL2 1FP: not on the flood risk listAL2 1FQ: not on the flood risk listAL2 1FR: not on the flood risk listAL2 1FT: not on the flood risk listAL2 1FU: not on the flood risk listAL2 1GA: not on the flood risk listAL2 1GB: not on the flood risk listAL2 1GD: not on the flood risk listAL2 1GE: not on the flood risk listAL2 1GF: not on the flood risk listAL2 1GG: not on the flood risk listAL2 1GH: not on the flood risk listAL2 1GJ: not on the flood risk listAL2 1GL: not on the flood risk listAL2 1GN: not on the flood risk listAL2 1GP: not on the flood risk listAL2 1GQ: not on the flood risk listAL2 1GR: not on the flood risk listAL2 1GX: not on the flood risk listAL2 1GY: not on the flood risk listAL2 1GZ: not on the flood risk listAL2 1HA: not on the flood risk listAL2 1HB: not on the flood risk listAL2 1HD: not on the flood risk listAL2 1HE: not on the flood risk listAL2 1HL: not on the flood risk listAL2 1HN: not on the flood risk listAL2 1HP: not on the flood risk listAL2 1HQ: not on the flood risk listAL2 1HR: not on the flood risk listAL2 1HS: not on the flood risk listAL2 1HT: not on the flood risk listAL2 1HU: not on the flood risk listAL2 1HW: not on the flood risk listAL2 1HX: not on the flood risk listAL2 1HY: not on the flood risk listAL2 1HZ: not on the flood risk listAL2 1JA: not on the flood risk listAL2 1JB: not on the flood risk listAL2 1JD: not on the flood risk listAL2 1JE: not on the flood risk listAL2 1JF: not on the flood risk listAL2 1JG: not on the flood risk listAL2 1JH: not on the flood risk listAL2 1JJ: not on the flood risk listAL2 1JL: not on the flood risk listAL2 1JN: not on the flood risk listAL2 1JP: not on the flood risk listAL2 1JQ: not on the flood risk listAL2 1JR: not on the flood risk listAL2 1JS: not on the flood risk listAL2 1JT: not on the flood risk listAL2 1JU: not on the flood risk listAL2 1JW: not on the flood risk listAL2 1JX: not on the flood risk listAL2 1JY: not on the flood risk listAL2 1JZ: not on the flood risk listAL2 1LB: not on the flood risk listAL2 1LD: not on the flood risk listAL2 1LE: not on the flood risk listAL2 1LF: not on the flood risk listAL2 1LL: not on the flood risk listAL2 1LN: not on the flood risk listAL2 1LP: not on the flood risk listAL2 1LS: not on the flood risk listAL2 1LT: not on the flood risk listAL2 1LU: not on the flood risk listAL2 1LW: not on the flood risk listAL2 1LX: not on the flood risk listAL2 1LZ: not on the flood risk listAL2 1NA: not on the flood risk listAL2 1NB: not on the flood risk listAL2 1ND: not on the flood risk listAL2 1NE: not on the flood risk listAL2 1NF: not on the flood risk listAL2 1NG: not on the flood risk listAL2 1NH: not on the flood risk listAL2 1NJ: not on the flood risk listAL2 1NL: not on the flood risk listAL2 1NP: not on the flood risk listAL2 1NQ: not on the flood risk listAL2 1NS: not on the flood risk listAL2 1NT: not on the flood risk listAL2 1NU: not on the flood risk listAL2 1NW: not on the flood risk listAL2 1NX: not on the flood risk listAL2 1NY: not on the flood risk listAL2 1PD: not on the flood risk listAL2 1PF: not on the flood risk listAL2 1PG: not on the flood risk listAL2 1PH: not on the flood risk listAL2 1PJ: not on the flood risk listAL2 1PL: not on the flood risk listAL2 1PN: not on the flood risk listAL2 1PP: not on the flood risk listAL2 1PQ: not on the flood risk listAL2 1PR: not on the flood risk listAL2 1PS: not on the flood risk listAL2 1PT: not on the flood risk listAL2 1PU: not on the flood risk listAL2 1PW: not on the flood risk listAL2 1PX: not on the flood risk listAL2 1PY: not on the flood risk listAL2 1PZ: not on the flood risk listAL2 1QD: not on the flood risk listAL2 1QF: not on the flood risk listAL2 1QG: not on the flood risk listAL2 1QH: not on the flood risk listAL2 1QJ: not on the flood risk listAL2 1QL: not on the flood risk listAL2 1QN: not on the flood risk listAL2 1QP: not on the flood risk listAL2 1QQ: not on the flood risk listAL2 1QR: not on the flood risk listAL2 1QS: not on the flood risk listAL2 1QT: not on the flood risk listAL2 1QW: not on the flood risk listAL2 1RF: not on the flood risk listAL2 1RG: not on the flood risk listAL2 1RH: not on the flood risk listAL2 1RJ: not on the flood risk listAL2 1RL: not on the flood risk listAL2 1RP: not on the flood risk listAL2 1RQ: not on the flood risk listAL2 1RS: not on the flood risk listAL2 1RY: not on the flood risk listAL2 1SS: not on the flood risk listAL2 1TA: not on the flood risk listAL2 1TB: not on the flood risk listAL2 1TD: not on the flood risk listAL2 1TE: not on the flood risk listAL2 1TF: not on the flood risk listAL2 1TG: not on the flood risk listAL2 1TH: not on the flood risk listAL2 1TJ: not on the flood risk listAL2 1TL: not on the flood risk listAL2 1TN: not on the flood risk listAL2 1TP: not on the flood risk listAL2 1UA: not on the flood risk listAL2 1UB: not on the flood risk listAL2 1UD: not on the flood risk listAL2 1UE: not on the flood risk listAL2 1UF: not on the flood risk listAL2 1UG: not on the flood risk listAL2 1UH: not on the flood risk listAL2 1UJ: not on the flood risk listAL2 1UL: not on the flood risk listAL2 1UN: not on the flood risk listAL2 1UP: not on the flood risk listAL2 1UQ: not on the flood risk listAL2 1UR: not on the flood risk listAL2 1US: not on the flood risk listAL2 1UT: not on the flood risk listAL2 1UW: not on the flood risk listAL2 1UX: not on the flood risk listAL2 1WW: not on the flood risk listAL2 1BE: low flood risk at worstAL2 1BG: low flood risk at worstAL2 1BJ: low flood risk at worstAL2 1BZ: low flood risk at worstAL2 1DT: low flood risk at worstAL2 1DW: low flood risk at worstAL2 1FS: low flood risk at worstAL2 1HG: low flood risk at worstAL2 1LG: low flood risk at worstAL2 1QU: low flood risk at worstAL2 1RD: low flood risk at worstAL2 1RW: low flood risk at worstAL2 1AH: medium flood risk at worstAL2 1AZ: medium flood risk at worstAL2 1DG: medium flood risk at worstAL2 1DY: medium flood risk at worstAL2 1LQ: medium flood risk at worstAL2 1QA: medium flood risk at worstAL2 1SA: medium flood risk at worstAL2 1AD: high flood riskAL2 1BA: high flood riskAL2 1BB: high flood riskAL2 1BY: high flood riskAL2 1DP: high flood riskAL2 1DQ: high flood riskAL2 1LJ: high flood riskAL2 1NZ: high flood riskAL2 1PA: high flood riskAL2 1PB: high flood riskAL2 1PE: high flood riskAL2 1QX: high flood riskAL2 1QY: high flood riskAL2 1QZ: high flood riskAL2 1RB: high flood riskAL2 1RE: high flood riskAL2 1RN: high flood riskAL2 1RR: high flood riskAL2 1RT: high flood riskAL2 1RU: high flood riskAL2 1RX: high flood riskAL2 1RZ: high flood risk London Colney 10 postcodes at high or medium risk, outlined: this goes to AL2 1PE, the one with most homes and businesses at high risk10 postcodes at high or medium risk8 postcodes at high or medium risk, outlined: this goes to AL2 1RB, the one with most homes and businesses at high risk8 postcodes at high or medium risk Map of every postcode in the AL2 1 sector, by flood risk Of the 248 postcodes in the AL2 1 sector that ONS places, 22 have a home or business at high risk, 7 are at medium risk at worst, 12 are at low risk at worst and 207 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 10 postcodes at high or medium risk; 8 postcodes at high or medium risk. One postcode lies beyond the edge and is listed under the map. Places named: London Colney. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. London Colney
  • A home or business at high risk: 22
  • At medium risk at worst: 7
  • At low risk at worst: 12
  • At very low risk only: 0
  • Not on the at-risk list: 207
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 248 postcodes in the AL2 1 sector that ONS places, 22 have a home or business at high risk, 7 are at medium risk at worst, 12 are at low risk at worst and 207 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.

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

22 postcodes here have a home or business at high risk. These are the 12 with the most homes and businesses at that risk.

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

AL2 1PE35 at high riskAL2 1RR19 at high riskAL2 1PA14 at high riskAL2 1RU11 at high riskAL2 1LJ9 at high riskAL2 1RX8 at high riskAL2 1PB7 at high riskAL2 1RN6 at high riskAL2 1RT6 at high riskAL2 1RB6 at high riskAL2 1BB5 at high riskAL2 1QX4 at high risk

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.

AL2 1RA

Where the postcodes at high or medium risk lie together

  • 10 postcodes at high or medium risk, outlined on the map. AL2 1PE, is the one with most homes and businesses at high risk.
  • 8 postcodes at high or medium risk, outlined on the map. AL2 1RB, is the one with most homes and businesses at high risk.

What do homes sell for in AL2 1?

Homes in AL2 1 sold for a typical £420,000 in the 12 months to August 2026, across 113 sales, down 6.7% on the 12 months before, HM Land Registry's figures show.

£420,000 typical price, the 12 months to August 2026
£450,000 12 months to August 2025
▼ down 6.7% on the 12 months before
  • Detached £652,500 8 sales
  • Semi-detached £520,000 19 sales
  • Terraced £450,000 45 sales
  • Flat or maisonette £263,000 41 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 AL2 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 AL2 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.

AL2 1ABAL2 1ADAL2 1AEAL2 1AFAL2 1AGAL2 1AHAL2 1AJAL2 1APAL2 1ATAL2 1AUAL2 1AWAL2 1AZAL2 1BAAL2 1BBAL2 1BEAL2 1BGAL2 1BHAL2 1BJAL2 1BLAL2 1BPAL2 1BSAL2 1BTAL2 1BUAL2 1BWAL2 1BXAL2 1BYAL2 1BZAL2 1DAAL2 1DEAL2 1DFAL2 1DGAL2 1DHAL2 1DJAL2 1DLAL2 1DNAL2 1DPAL2 1DQAL2 1DRAL2 1DTAL2 1DWAL2 1DYAL2 1DZAL2 1EAAL2 1EBAL2 1EDAL2 1EEAL2 1EFAL2 1EGAL2 1EHAL2 1EJAL2 1ENAL2 1EPAL2 1EQAL2 1ERAL2 1ESAL2 1ETAL2 1EUAL2 1EWAL2 1EYAL2 1EZAL2 1FBAL2 1FDAL2 1FEAL2 1FGAL2 1FHAL2 1FNAL2 1FPAL2 1FQAL2 1FRAL2 1FSAL2 1FTAL2 1FUAL2 1GAAL2 1GBAL2 1GDAL2 1GEAL2 1GFAL2 1GGAL2 1GHAL2 1GJAL2 1GLAL2 1GNAL2 1GPAL2 1GQAL2 1GRAL2 1GXAL2 1GYAL2 1GZAL2 1HAAL2 1HBAL2 1HDAL2 1HEAL2 1HGAL2 1HLAL2 1HNAL2 1HPAL2 1HQAL2 1HRAL2 1HSAL2 1HTAL2 1HUAL2 1HWAL2 1HXAL2 1HYAL2 1HZAL2 1JAAL2 1JBAL2 1JDAL2 1JEAL2 1JFAL2 1JGAL2 1JHAL2 1JJAL2 1JLAL2 1JNAL2 1JPAL2 1JQAL2 1JRAL2 1JSAL2 1JTAL2 1JUAL2 1JWAL2 1JXAL2 1JYAL2 1JZAL2 1LBAL2 1LDAL2 1LEAL2 1LFAL2 1LGAL2 1LJAL2 1LLAL2 1LNAL2 1LPAL2 1LQAL2 1LSAL2 1LTAL2 1LUAL2 1LWAL2 1LXAL2 1LZAL2 1NAAL2 1NBAL2 1NDAL2 1NEAL2 1NFAL2 1NGAL2 1NHAL2 1NJAL2 1NLAL2 1NPAL2 1NQAL2 1NSAL2 1NTAL2 1NUAL2 1NWAL2 1NXAL2 1NYAL2 1NZAL2 1PAAL2 1PBAL2 1PDAL2 1PEAL2 1PFAL2 1PGAL2 1PHAL2 1PJAL2 1PLAL2 1PNAL2 1PPAL2 1PQAL2 1PRAL2 1PSAL2 1PTAL2 1PUAL2 1PWAL2 1PXAL2 1PYAL2 1PZAL2 1QAAL2 1QDAL2 1QFAL2 1QGAL2 1QHAL2 1QJAL2 1QLAL2 1QNAL2 1QPAL2 1QQAL2 1QRAL2 1QSAL2 1QTAL2 1QUAL2 1QWAL2 1QXAL2 1QYAL2 1QZAL2 1RAAL2 1RBAL2 1RDAL2 1REAL2 1RFAL2 1RGAL2 1RHAL2 1RJAL2 1RLAL2 1RNAL2 1RPAL2 1RQAL2 1RRAL2 1RSAL2 1RTAL2 1RUAL2 1RWAL2 1RXAL2 1RYAL2 1RZAL2 1SAAL2 1SSAL2 1TAAL2 1TBAL2 1TDAL2 1TEAL2 1TFAL2 1TGAL2 1THAL2 1TJAL2 1TLAL2 1TNAL2 1TPAL2 1UAAL2 1UBAL2 1UDAL2 1UEAL2 1UFAL2 1UGAL2 1UHAL2 1UJAL2 1ULAL2 1UNAL2 1UPAL2 1UQAL2 1URAL2 1USAL2 1UTAL2 1UWAL2 1UXAL2 1WW

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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