AL5 postcode district: Harpenden and around

AL5 is a postcode district mostly in Hertfordshire, with 1,058 postcodes in use in 6 sectors. It has postcodes in Harpenden and St Albans. It is split between 2 councils: St Albans (1,055 postcodes) and Central Bedfordshire (3). 1,055 are in Hertfordshire. ONS lists no county for the other 3.

Postcodes in use
1,058
Sectors
6
Councils
2 councils
Places
2 places

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in AL5, by flood risk

Map of every postcode in AL5, by flood risk Of the 1,058 postcodes in AL5 that ONS places, 3 have a home or business at high risk, 4 are at low risk at worst, 5 are at very low risk only and 1,046 are not on the Environment Agency's at-risk list. Places named: Harpenden, St Albans, Redbourn, Wheathampstead. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. A1081A5183M1A1057 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 1AN: 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 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 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 1DL: not on the flood risk listAL5 1DN: not on the flood risk listAL5 1DQ: not on the flood risk listAL5 1DT: not on the flood risk listAL5 1DY: not on the flood risk listAL5 1DZ: 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 1EH: 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 1ET: not on the flood risk listAL5 1EU: 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 1GZ: 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 1JP: not on the flood risk listAL5 1JQ: 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 1JY: not on the flood risk listAL5 1LG: not on the flood risk listAL5 1LJ: 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 1LS: not on the flood risk listAL5 1LT: not on the flood risk listAL5 1LU: not on the flood risk listAL5 1LX: 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 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 1QA: not on the flood risk listAL5 1QB: not on the flood risk listAL5 1QD: 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 1QN: not on the flood risk listAL5 1QP: 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 1RJ: not on the flood risk listAL5 1RL: 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 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 1SP: 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 1TA: 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 listAL5 2AA: not on the flood risk listAL5 2AB: not on the flood risk listAL5 2AD: not on the flood risk listAL5 2AE: not on the flood risk listAL5 2AF: not on the flood risk listAL5 2AG: not on the flood risk listAL5 2AH: not on the flood risk listAL5 2AJ: not on the flood risk listAL5 2AL: not on the flood risk listAL5 2AN: not on the flood risk listAL5 2AP: not on the flood risk listAL5 2AQ: not on the flood risk listAL5 2AR: not on the flood risk listAL5 2AT: not on the flood risk listAL5 2AU: not on the flood risk listAL5 2AW: not on the flood risk listAL5 2AX: not on the flood risk listAL5 2AY: not on the flood risk listAL5 2AZ: not on the flood risk listAL5 2BA: not on the flood risk listAL5 2BB: not on the flood risk listAL5 2BE: not on the flood risk listAL5 2BG: not on the flood risk listAL5 2BH: not on the flood risk listAL5 2BL: not on the flood risk listAL5 2BN: not on the flood risk listAL5 2BQ: not on the flood risk listAL5 2BS: not on the flood risk listAL5 2BT: not on the flood risk listAL5 2BU: not on the flood risk listAL5 2BW: not on the flood risk listAL5 2BY: not on the flood risk listAL5 2DA: not on the flood risk listAL5 2DB: not on the flood risk listAL5 2DD: not on the flood risk listAL5 2DF: not on the flood risk listAL5 2DG: not on the flood risk listAL5 2DH: not on the flood risk listAL5 2DJ: not on the flood risk listAL5 2DN: not on the flood risk listAL5 2DP: not on the flood risk listAL5 2DQ: not on the flood risk listAL5 2DR: not on the flood risk listAL5 2DS: not on the flood risk listAL5 2DT: not on the flood risk listAL5 2DU: not on the flood risk listAL5 2DX: not on the flood risk listAL5 2DZ: not on the flood risk listAL5 2EA: not on the flood risk listAL5 2EB: not on the flood risk listAL5 2ED: not on the flood risk listAL5 2EE: not on the flood risk listAL5 2EG: not on the flood risk listAL5 2EL: not on the flood risk listAL5 2EN: not on the flood risk listAL5 2EP: not on the flood risk listAL5 2ER: not on the flood risk listAL5 2ET: not on the flood risk listAL5 2EW: not on the flood risk listAL5 2EX: not on the flood risk listAL5 2EZ: not on the flood risk listAL5 2FB: not on the flood risk listAL5 2FE: not on the flood risk listAL5 2FF: not on the flood risk listAL5 2FG: not on the flood risk listAL5 2FH: not on the flood risk listAL5 2FL: not on the flood risk listAL5 2FQ: not on the flood risk listAL5 2FR: not on the flood risk listAL5 2FS: not on the flood risk listAL5 2FT: not on the flood risk listAL5 2GT: not on the flood risk listAL5 2GX: not on the flood risk listAL5 2HA: not on the flood risk listAL5 2HB: not on the flood risk listAL5 2HD: not on the flood risk listAL5 2HE: not on the flood risk listAL5 2HG: not on the flood risk listAL5 2HH: not on the flood risk listAL5 2HJ: not on the flood risk listAL5 2HL: not on the flood risk listAL5 2HN: not on the flood risk listAL5 2HQ: not on the flood risk listAL5 2HU: not on the flood risk listAL5 2HW: not on the flood risk listAL5 2HZ: not on the flood risk listAL5 2JB: not on the flood risk listAL5 2JG: not on the flood risk listAL5 2JH: not on the flood risk listAL5 2JJ: not on the flood risk listAL5 2JN: not on the flood risk listAL5 2JP: not on the flood risk listAL5 2JR: not on the flood risk listAL5 2JT: not on the flood risk listAL5 2JU: not on the flood risk listAL5 2JW: not on the flood risk listAL5 2JY: not on the flood risk listAL5 2JZ: not on the flood risk listAL5 2LA: not on the flood risk listAL5 2LB: not on the flood risk listAL5 2LD: not on the flood risk listAL5 2LE: not on the flood risk listAL5 2LF: not on the flood risk listAL5 2LG: not on the flood risk listAL5 2LH: not on the flood risk listAL5 2LJ: not on the flood risk listAL5 2LL: not on the flood risk listAL5 2LN: not on the flood risk listAL5 2LQ: not on the flood risk listAL5 2LR: not on the flood risk listAL5 2LU: not on the flood risk listAL5 2LZ: not on the flood risk listAL5 2NA: not on the flood risk listAL5 2NB: not on the flood risk listAL5 2ND: not on the flood risk listAL5 2NE: not on the flood risk listAL5 2NG: not on the flood risk listAL5 2NH: not on the flood risk listAL5 2NJ: not on the flood risk listAL5 2NL: not on the flood risk listAL5 2NN: not on the flood risk listAL5 2NP: not on the flood risk listAL5 2NQ: not on the flood risk listAL5 2NR: not on the flood risk listAL5 2NS: not on the flood risk listAL5 2NT: not on the flood risk listAL5 2NU: not on the flood risk listAL5 2NW: not on the flood risk listAL5 2NX: not on the flood risk listAL5 2NY: not on the flood risk listAL5 2NZ: not on the flood risk listAL5 2PA: not on the flood risk listAL5 2PB: not on the flood risk listAL5 2PF: not on the flood risk listAL5 2PG: not on the flood risk listAL5 2PH: not on the flood risk listAL5 2PL: not on the flood risk listAL5 2PP: not on the flood risk listAL5 2PS: not on the flood risk listAL5 2PT: not on the flood risk listAL5 2PY: not on the flood risk listAL5 2QB: not on the flood risk listAL5 2QE: not on the flood risk listAL5 2QF: not on the flood risk listAL5 2QG: not on the flood risk listAL5 2QH: not on the flood risk listAL5 2QL: not on the flood risk listAL5 2QN: not on the flood risk listAL5 2QP: not on the flood risk listAL5 2QS: not on the flood risk listAL5 2QT: not on the flood risk listAL5 2QX: not on the flood risk listAL5 2QY: not on the flood risk listAL5 2QZ: not on the flood risk listAL5 2RE: not on the flood risk listAL5 2RG: not on the flood risk listAL5 2RH: not on the flood risk listAL5 2RN: not on the flood risk listAL5 2RQ: not on the flood risk listAL5 2RT: not on the flood risk listAL5 2RU: not on the flood risk listAL5 2RW: not on the flood risk listAL5 2SD: not on the flood risk listAL5 2SL: not on the flood risk listAL5 2SN: not on the flood risk listAL5 2SU: not on the flood risk listAL5 2TB: not on the flood risk listAL5 2TH: not on the flood risk listAL5 2TJ: not on the flood risk listAL5 2TP: not on the flood risk listAL5 2UA: not on the flood risk listAL5 2UB: not on the flood risk listAL5 2UD: not on the flood risk listAL5 2UE: not on the flood risk listAL5 2UF: not on the flood risk listAL5 2UH: not on the flood risk listAL5 2UJ: not on the flood risk listAL5 2UP: not on the flood risk listAL5 2UQ: not on the flood risk listAL5 2UR: not on the flood risk listAL5 2UT: not on the flood risk listAL5 3AB: not on the flood risk listAL5 3AD: not on the flood risk listAL5 3AE: not on the flood risk listAL5 3AF: not on the flood risk listAL5 3AG: not on the flood risk listAL5 3AH: not on the flood risk listAL5 3AJ: not on the flood risk listAL5 3AL: not on the flood risk listAL5 3AN: not on the flood risk listAL5 3AP: not on the flood risk listAL5 3AQ: not on the flood risk listAL5 3AR: not on the flood risk listAL5 3AT: not on the flood risk listAL5 3AU: not on the flood risk listAL5 3AW: not on the flood risk listAL5 3AY: not on the flood risk listAL5 3AZ: not on the flood risk listAL5 3BA: not on the flood risk listAL5 3BB: not on the flood risk listAL5 3BD: not on the flood risk listAL5 3BE: not on the flood risk listAL5 3BJ: not on the flood risk listAL5 3BN: not on the flood risk listAL5 3BP: not on the flood risk listAL5 3BQ: not on the flood risk listAL5 3BS: not on the flood risk listAL5 3BT: not on the flood risk listAL5 3BW: not on the flood risk listAL5 3BZ: not on the flood risk listAL5 3DD: not on the flood risk listAL5 3DE: not on the flood risk listAL5 3DP: not on the flood risk listAL5 3DR: not on the flood risk listAL5 3DS: not on the flood risk listAL5 3DT: not on the flood risk listAL5 3DU: not on the flood risk listAL5 3DW: not on the flood risk listAL5 3DZ: not on the flood risk listAL5 3ED: not on the flood risk listAL5 3EF: not on the flood risk listAL5 3EG: not on the flood risk listAL5 3EH: not on the flood risk listAL5 3EJ: not on the flood risk listAL5 3EL: not on the flood risk listAL5 3EN: not on the flood risk listAL5 3EP: not on the flood risk listAL5 3EQ: not on the flood risk listAL5 3ER: not on the flood risk listAL5 3ES: not on the flood risk listAL5 3ET: not on the flood risk listAL5 3EU: not on the flood risk listAL5 3EW: not on the flood risk listAL5 3EX: not on the flood risk listAL5 3EY: not on the flood risk listAL5 3EZ: not on the flood risk listAL5 3FA: not on the flood risk listAL5 3HA: not on the flood risk listAL5 3HB: not on the flood risk listAL5 3HD: not on the flood risk listAL5 3HE: not on the flood risk listAL5 3HF: not on the flood risk listAL5 3HH: not on the flood risk listAL5 3HJ: not on the flood risk listAL5 3HN: not on the flood risk listAL5 3HP: not on the flood risk listAL5 3HQ: not on the flood risk listAL5 3HR: not on the flood risk listAL5 3HS: not on the flood risk listAL5 3HT: not on the flood risk listAL5 3LA: not on the flood risk listAL5 3LE: not on the flood risk listAL5 3LG: not on the flood risk listAL5 3LH: not on the flood risk listAL5 3LN: not on the flood risk listAL5 3LP: not on the flood risk listAL5 3LQ: not on the flood risk listAL5 3LR: not on the flood risk listAL5 3LT: not on the flood risk listAL5 3LU: not on the flood risk listAL5 3LW: not on the flood risk listAL5 3LX: not on the flood risk listAL5 3LZ: not on the flood risk listAL5 3NA: not on the flood risk listAL5 3NB: not on the flood risk listAL5 3ND: not on the flood risk listAL5 3NF: not on the flood risk listAL5 3NG: not on the flood risk listAL5 3NH: not on the flood risk listAL5 3NJ: not on the flood risk listAL5 3NL: not on the flood risk listAL5 3NN: not on the flood risk listAL5 3NP: not on the flood risk listAL5 3NR: not on the flood risk listAL5 3NS: not on the flood risk listAL5 3NT: not on the flood risk listAL5 3NU: not on the flood risk listAL5 3NX: not on the flood risk listAL5 3NY: not on the flood risk listAL5 3NZ: not on the flood risk listAL5 3PA: not on the flood risk listAL5 3PB: not on the flood risk listAL5 3PD: not on the flood risk listAL5 3PE: not on the flood risk listAL5 3PF: not on the flood risk listAL5 3PG: not on the flood risk listAL5 3PH: not on the flood risk listAL5 3PJ: not on the flood risk listAL5 3PL: not on the flood risk listAL5 3PP: not on the flood risk listAL5 3PQ: not on the flood risk listAL5 3PR: not on the flood risk listAL5 3PS: not on the flood risk listAL5 3PT: not on the flood risk listAL5 3PU: not on the flood risk listAL5 3PW: not on the flood risk listAL5 3PY: not on the flood risk listAL5 3PZ: not on the flood risk listAL5 3QB: not on the flood risk listAL5 3QD: not on the flood risk listAL5 3QE: not on the flood risk listAL5 3QF: not on the flood risk listAL5 3RA: not on the flood risk listAL5 4AB: not on the flood risk listAL5 4AE: not on the flood risk listAL5 4AF: not on the flood risk listAL5 4AG: not on the flood risk listAL5 4AH: not on the flood risk listAL5 4AJ: not on the flood risk listAL5 4AL: not on the flood risk listAL5 4AN: not on the flood risk listAL5 4AQ: not on the flood risk listAL5 4AR: not on the flood risk listAL5 4AS: not on the flood risk listAL5 4AT: not on the flood risk listAL5 4AU: not on the flood risk listAL5 4AX: not on the flood risk listAL5 4BA: not on the flood risk listAL5 4BB: not on the flood risk listAL5 4BD: not on the flood risk listAL5 4BE: not on the flood risk listAL5 4BG: not on the flood risk listAL5 4BP: not on the flood risk listAL5 4BQ: not on the flood risk listAL5 4BS: not on the flood risk listAL5 4BU: not on the flood risk listAL5 4BW: not on the flood risk listAL5 4BX: not on the flood risk listAL5 4BZ: not on the flood risk listAL5 4DB: not on the flood risk listAL5 4DD: not on the flood risk listAL5 4DE: not on the flood risk listAL5 4DG: not on the flood risk listAL5 4DN: not on the flood risk listAL5 4DU: not on the flood risk listAL5 4EA: not on the flood risk listAL5 4ED: not on the flood risk listAL5 4EG: not on the flood risk listAL5 4EL: not on the flood risk listAL5 4EP: not on the flood risk listAL5 4EQ: not on the flood risk listAL5 4EU: not on the flood risk listAL5 4EY: not on the flood risk listAL5 4EZ: not on the flood risk listAL5 4FB: not on the flood risk listAL5 4FE: not on the flood risk listAL5 4FF: not on the flood risk listAL5 4FG: not on the flood risk listAL5 4FH: not on the flood risk listAL5 4FJ: not on the flood risk listAL5 4FL: not on the flood risk listAL5 4FN: not on the flood risk listAL5 4FP: not on the flood risk listAL5 4FQ: not on the flood risk listAL5 4FR: not on the flood risk listAL5 4FS: not on the flood risk listAL5 4FU: not on the flood risk listAL5 4FW: not on the flood risk listAL5 4GA: not on the flood risk listAL5 4GB: not on the flood risk listAL5 4GJ: not on the flood risk listAL5 4GW: not on the flood risk listAL5 4GX: not on the flood risk listAL5 4HA: not on the flood risk listAL5 4HD: not on the flood risk listAL5 4HE: not on the flood risk listAL5 4HF: not on the flood risk listAL5 4HG: not on the flood risk listAL5 4HH: not on the flood risk listAL5 4HJ: not on the flood risk listAL5 4HR: not on the flood risk listAL5 4HS: not on the flood risk listAL5 4HT: not on the flood risk listAL5 4HW: not on the flood risk listAL5 4HY: not on the flood risk listAL5 4JB: not on the flood risk listAL5 4JD: not on the flood risk listAL5 4JE: not on the flood risk listAL5 4JN: not on the flood risk listAL5 4JP: not on the flood risk listAL5 4JR: not on the flood risk listAL5 4JS: not on the flood risk listAL5 4JT: not on the flood risk listAL5 4JW: not on the flood risk listAL5 4JX: not on the flood risk listAL5 4JY: not on the flood risk listAL5 4JZ: not on the flood risk listAL5 4LA: not on the flood risk listAL5 4LB: not on the flood risk listAL5 4LE: not on the flood risk listAL5 4LF: not on the flood risk listAL5 4LG: not on the flood risk listAL5 4LJ: not on the flood risk listAL5 4LL: not on the flood risk listAL5 4LN: not on the flood risk listAL5 4LP: not on the flood risk listAL5 4LR: not on the flood risk listAL5 4LS: not on the flood risk listAL5 4LT: not on the flood risk listAL5 4LX: not on the flood risk listAL5 4LY: not on the flood risk listAL5 4LZ: not on the flood risk listAL5 4NA: not on the flood risk listAL5 4NF: not on the flood risk listAL5 4NG: not on the flood risk listAL5 4NL: not on the flood risk listAL5 4NS: not on the flood risk listAL5 4NT: not on the flood risk listAL5 4NX: not on the flood risk listAL5 4NZ: not on the flood risk listAL5 4PB: not on the flood risk listAL5 4PD: not on the flood risk listAL5 4PF: not on the flood risk listAL5 4PG: not on the flood risk listAL5 4PH: not on the flood risk listAL5 4PJ: not on the flood risk listAL5 4PL: not on the flood risk listAL5 4PN: not on the flood risk listAL5 4PP: not on the flood risk listAL5 4PQ: not on the flood risk listAL5 4PR: not on the flood risk listAL5 4PW: not on the flood risk listAL5 4QA: not on the flood risk listAL5 4QB: not on the flood risk listAL5 4QE: not on the flood risk listAL5 4QF: not on the flood risk listAL5 4QG: not on the flood risk listAL5 4QH: not on the flood risk listAL5 4QJ: not on the flood risk listAL5 4QL: not on the flood risk listAL5 4QN: not on the flood risk listAL5 4QP: not on the flood risk listAL5 4QQ: not on the flood risk listAL5 4QR: not on the flood risk listAL5 4QU: not on the flood risk listAL5 4QW: not on the flood risk listAL5 4QX: not on the flood risk listAL5 4RD: not on the flood risk listAL5 4RE: not on the flood risk listAL5 4RF: not on the flood risk listAL5 4RG: not on the flood risk listAL5 4RL: not on the flood risk listAL5 4RN: not on the flood risk listAL5 4RQ: not on the flood risk listAL5 4RR: not on the flood risk listAL5 4RU: not on the flood risk listAL5 4SJ: not on the flood risk listAL5 4SP: not on the flood risk listAL5 4SU: not on the flood risk listAL5 4SY: not on the flood risk listAL5 4TA: not on the flood risk listAL5 4TB: not on the flood risk listAL5 4TD: not on the flood risk listAL5 4TE: not on the flood risk listAL5 4TF: not on the flood risk listAL5 4TH: not on the flood risk listAL5 4TJ: not on the flood risk listAL5 4TP: not on the flood risk listAL5 4TQ: not on the flood risk listAL5 4TR: not on the flood risk listAL5 4TS: not on the flood risk listAL5 4TW: not on the flood risk listAL5 4TX: not on the flood risk listAL5 4TY: not on the flood risk listAL5 4TZ: not on the flood risk listAL5 4UE: not on the flood risk listAL5 4UH: not on the flood risk listAL5 4UJ: not on the flood risk listAL5 4UL: not on the flood risk listAL5 4US: not on the flood risk listAL5 4UW: not on the flood risk listAL5 4UZ: not on the flood risk listAL5 4XA: not on the flood risk listAL5 4XE: not on the flood risk listAL5 4XF: not on the flood risk listAL5 4XG: not on the flood risk listAL5 4XH: not on the flood risk listAL5 4XS: not on the flood risk listAL5 4XT: not on the flood risk listAL5 5AA: not on the flood risk listAL5 5AB: not on the flood risk listAL5 5AD: not on the flood risk listAL5 5AF: not on the flood risk listAL5 5AH: not on the flood risk listAL5 5AP: not on the flood risk listAL5 5AQ: not on the flood risk listAL5 5AR: not on the flood risk listAL5 5AS: not on the flood risk listAL5 5AT: not on the flood risk listAL5 5AW: not on the flood risk listAL5 5AX: not on the flood risk listAL5 5AZ: not on the flood risk listAL5 5BA: not on the flood risk listAL5 5BD: not on the flood risk listAL5 5BG: not on the flood risk listAL5 5BH: not on the flood risk listAL5 5BJ: not on the flood risk listAL5 5BL: not on the flood risk listAL5 5BN: not on the flood risk listAL5 5BQ: not on the flood risk listAL5 5BS: not on the flood risk listAL5 5BT: not on the flood risk listAL5 5BU: not on the flood risk listAL5 5BW: not on the flood risk listAL5 5DN: not on the flood risk listAL5 5DP: not on the flood risk listAL5 5DR: not on the flood risk listAL5 5DS: not on the flood risk listAL5 5DU: not on the flood risk listAL5 5DW: not on the flood risk listAL5 5DX: not on the flood risk listAL5 5DY: not on the flood risk listAL5 5DZ: not on the flood risk listAL5 5EA: not on the flood risk listAL5 5EB: not on the flood risk listAL5 5ED: not on the flood risk listAL5 5EE: not on the flood risk listAL5 5EJ: not on the flood risk listAL5 5EQ: not on the flood risk listAL5 5EW: not on the flood risk listAL5 5EZ: not on the flood risk listAL5 5FA: not on the flood risk listAL5 5FB: not on the flood risk listAL5 5FD: not on the flood risk listAL5 5FF: not on the flood risk listAL5 5FH: not on the flood risk listAL5 5FJ: not on the flood risk listAL5 5HA: not on the flood risk listAL5 5HB: not on the flood risk listAL5 5HE: not on the flood risk listAL5 5HF: not on the flood risk listAL5 5HH: not on the flood risk listAL5 5HJ: not on the flood risk listAL5 5HL: not on the flood risk listAL5 5HP: not on the flood risk listAL5 5HR: not on the flood risk listAL5 5HS: not on the flood risk listAL5 5HT: not on the flood risk listAL5 5HU: not on the flood risk listAL5 5HW: not on the flood risk listAL5 5HZ: not on the flood risk listAL5 5JB: not on the flood risk listAL5 5JD: not on the flood risk listAL5 5JG: not on the flood risk listAL5 5JH: not on the flood risk listAL5 5JL: not on the flood risk listAL5 5JP: not on the flood risk listAL5 5JQ: not on the flood risk listAL5 5LB: not on the flood risk listAL5 5LD: not on the flood risk listAL5 5LG: not on the flood risk listAL5 5LH: not on the flood risk listAL5 5LL: not on the flood risk listAL5 5LN: not on the flood risk listAL5 5LR: not on the flood risk listAL5 5LS: not on the flood risk listAL5 5LT: not on the flood risk listAL5 5LU: not on the flood risk listAL5 5LW: not on the flood risk listAL5 5LX: not on the flood risk listAL5 5NA: not on the flood risk listAL5 5NF: not on the flood risk listAL5 5NH: not on the flood risk listAL5 5NL: not on the flood risk listAL5 5NN: not on the flood risk listAL5 5NP: not on the flood risk listAL5 5NR: not on the flood risk listAL5 5NS: not on the flood risk listAL5 5NT: not on the flood risk listAL5 5NU: not on the flood risk listAL5 5NW: not on the flood risk listAL5 5PJ: not on the flood risk listAL5 5PL: not on the flood risk listAL5 5PN: not on the flood risk listAL5 5PP: not on the flood risk listAL5 5PR: not on the flood risk listAL5 5PS: not on the flood risk listAL5 5PT: not on the flood risk listAL5 5PU: not on the flood risk listAL5 5PW: not on the flood risk listAL5 5PX: not on the flood risk listAL5 5QJ: not on the flood risk listAL5 5QL: not on the flood risk listAL5 5QP: not on the flood risk listAL5 5QS: not on the flood risk listAL5 5QU: not on the flood risk listAL5 5QW: not on the flood risk listAL5 5QX: not on the flood risk listAL5 5QY: not on the flood risk listAL5 5QZ: not on the flood risk listAL5 5RB: not on the flood risk listAL5 5RD: not on the flood risk listAL5 5RE: not on the flood risk listAL5 5RH: not on the flood risk listAL5 5RP: not on the flood risk listAL5 5RQ: not on the flood risk listAL5 5RR: not on the flood risk listAL5 5RS: not on the flood risk listAL5 5RW: not on the flood risk listAL5 5RY: not on the flood risk listAL5 5SD: not on the flood risk listAL5 5SE: not on the flood risk listAL5 5SF: not on the flood risk listAL5 5SH: not on the flood risk listAL5 5SJ: not on the flood risk listAL5 5SL: not on the flood risk listAL5 5SQ: not on the flood risk listAL5 5SS: not on the flood risk listAL5 5ST: not on the flood risk listAL5 5SU: not on the flood risk listAL5 5SW: not on the flood risk listAL5 5SX: not on the flood risk listAL5 5SY: not on the flood risk listAL5 5SZ: not on the flood risk listAL5 5TA: not on the flood risk listAL5 5TF: not on the flood risk listAL5 5TH: not on the flood risk listAL5 5TJ: not on the flood risk listAL5 5TP: not on the flood risk listAL5 5TQ: not on the flood risk listAL5 5TR: not on the flood risk listAL5 5TS: not on the flood risk listAL5 5TT: not on the flood risk listAL5 5TU: not on the flood risk listAL5 5TX: not on the flood risk listAL5 5TY: not on the flood risk listAL5 5UA: not on the flood risk listAL5 5UB: not on the flood risk listAL5 5UD: not on the flood risk listAL5 5UG: not on the flood risk listAL5 4NQ: very low flood risk onlyAL5 4UU: very low flood risk onlyAL5 5EF: very low flood risk onlyAL5 5EG: very low flood risk onlyAL5 5EP: very low flood risk onlyAL5 4NH: low flood risk at worstAL5 5AE: low flood risk at worstAL5 5BX: low flood risk at worstAL5 5BZ: low flood risk at worstAL5 4UN: high flood riskAL5 5FE: high flood riskAL5 5UN: high flood risk HarpendenSt AlbansRedbournWheathampstead Map of every postcode in AL5, by flood risk Of the 1,058 postcodes in AL5 that ONS places, 3 have a home or business at high risk, 4 are at low risk at worst, 5 are at very low risk only and 1,046 are not on the Environment Agency's at-risk list. Places named: Harpenden, St Albans, Redbourn. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. A1081A5183M1 HarpendenSt AlbansRedbourn
  • A home or business at high risk: 3
  • At medium risk at worst: 0
  • At low risk at worst: 4
  • At very low risk only: 5
  • Not on the at-risk list: 1,046

Of the 1,058 postcodes in AL5 that ONS places, 3 have a home or business at high risk, 4 are at low risk at worst, 5 are at very low risk only and 1,046 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.

The middle of its postcodes: latitude 51.8159, longitude -0.3524. Open this area on OpenStreetMap

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.

AL5 4UN11 at high riskAL5 5FE1 at high riskAL5 5UN1 at high risk

What broadband can you get in AL5?

Ofcom reports on 1,037 of the 1,058 postcodes in AL5. At 883 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit883 of 1,037
Postcodes where every home can get superfast993 of 1,037

Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.

Check one address on Ofcom's checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

Is AL5 at risk of flooding?

12 of the 1,058 postcodes in AL5 have a home or business in an area at risk of flooding from rivers or the sea, the Environment Agency says. At those, it puts 13 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 12 of 1,058 postcodes High: 13Low: 40Very low: 18

High: 3.3% or more a year (1 in 30). Medium: 1% to 3.3% a year. Low: 0.1% to 1% a year. Very low: under 0.1% a year (1 in 1,000). Each band is the chance of flooding in any one year.

Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.

Source: Environment Agency, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it

What do homes sell for in AL5?

Homes in AL5 sold for a typical £791,825 in the 12 months to August 2026, across 352 sales, up 2.8% on the 12 months before, HM Land Registry's figures show.

£791,825 typical price, the 12 months to August 2026
£770,000 12 months to August 2025
▲ up 2.8% on the 12 months before
  • Detached £1,321,250 114 sales
  • Semi-detached £865,000 103 sales
  • Terraced £600,000 63 sales
  • Flat or maisonette £340,000 72 sales

Each bar is that kind's typical price, against the most expensive kind here.

Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.

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

Pick a sector, then a postcode. A sector is the district plus the next digit.

AL5 1192 postcodesAL5 2241 postcodesAL5 3141 postcodesAL5 4252 postcodesAL5 5223 postcodesAL5 99 postcodes
UK postcode format explained

Places in AL5

Towns and villages with postcodes in AL5, and how many each has here.

Harpenden postcodes,993St Albans postcodes,12

Who covers AL5

How many of the district's postcodes in use fall under each council, constituency and police force area.

Councils

What council am I in?

Constituencies

  • Harpenden and Berkhamsted1,043
  • St Albans12
  • Luton South and South Bedfordshire3

Police force areas

  • Hertfordshire1,055
  • Bedfordshire3

Next to AL5

AL4 postcode district AL6 postcode district All AL districts Harpenden postcodes

"Next to" is by number: the districts before and after AL5 in the AL area.

Check a postcode

Something wrong on this page? Report an error and we will check it against the source.