HP4 postcode district: Berkhamsted and around

HP4 is a postcode district mostly in Hertfordshire, with 737 postcodes in use in 4 sectors. It has postcodes in Berkhamsted. It is split between 3 councils: Dacorum (712 postcodes), Buckinghamshire (23) and Central Bedfordshire (2). 712 are in Hertfordshire. ONS lists no county for the other 25.

Postcodes in use
737
Sectors
4
Councils
3 councils
Places
Berkhamsted

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

Every postcode in HP4, by flood risk

Map of every postcode in HP4, by flood risk Of the 737 postcodes in HP4 that ONS places, 16 have a home or business at high risk, 3 are at medium risk at worst, 8 are at low risk at worst and 710 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. Places named: Berkhamsted, Pitstone. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. A416 HP4 1AA: not on the flood risk listHP4 1AD: not on the flood risk listHP4 1AE: not on the flood risk listHP4 1AJ: not on the flood risk listHP4 1AL: not on the flood risk listHP4 1AQ: not on the flood risk listHP4 1AR: not on the flood risk listHP4 1AT: not on the flood risk listHP4 1BS: not on the flood risk listHP4 1BT: not on the flood risk listHP4 1BW: not on the flood risk listHP4 1BX: not on the flood risk listHP4 1BZ: not on the flood risk listHP4 1DA: not on the flood risk listHP4 1DB: not on the flood risk listHP4 1DD: not on the flood risk listHP4 1DH: not on the flood risk listHP4 1DJ: not on the flood risk listHP4 1DL: not on the flood risk listHP4 1DN: not on the flood risk listHP4 1DR: not on the flood risk listHP4 1DS: not on the flood risk listHP4 1DT: not on the flood risk listHP4 1DU: not on the flood risk listHP4 1DX: not on the flood risk listHP4 1DY: not on the flood risk listHP4 1DZ: not on the flood risk listHP4 1EB: not on the flood risk listHP4 1ED: not on the flood risk listHP4 1EE: not on the flood risk listHP4 1EF: not on the flood risk listHP4 1EG: not on the flood risk listHP4 1EH: not on the flood risk listHP4 1EU: not on the flood risk listHP4 1EX: not on the flood risk listHP4 1EY: not on the flood risk listHP4 1EZ: not on the flood risk listHP4 1FD: not on the flood risk listHP4 1FF: not on the flood risk listHP4 1FN: not on the flood risk listHP4 1FP: not on the flood risk listHP4 1FQ: not on the flood risk listHP4 1FR: not on the flood risk listHP4 1FT: not on the flood risk listHP4 1HA: not on the flood risk listHP4 1HB: not on the flood risk listHP4 1HE: not on the flood risk listHP4 1HF: not on the flood risk listHP4 1HH: not on the flood risk listHP4 1HJ: not on the flood risk listHP4 1HL: not on the flood risk listHP4 1HN: not on the flood risk listHP4 1HP: not on the flood risk listHP4 1HQ: not on the flood risk listHP4 1HR: not on the flood risk listHP4 1HS: not on the flood risk listHP4 1HT: not on the flood risk listHP4 1HX: not on the flood risk listHP4 1HY: not on the flood risk listHP4 1HZ: not on the flood risk listHP4 1JA: not on the flood risk listHP4 1JB: not on the flood risk listHP4 1JD: not on the flood risk listHP4 1JE: not on the flood risk listHP4 1JF: not on the flood risk listHP4 1JG: not on the flood risk listHP4 1JH: not on the flood risk listHP4 1JJ: not on the flood risk listHP4 1JP: not on the flood risk listHP4 1JQ: not on the flood risk listHP4 1JS: not on the flood risk listHP4 1JT: not on the flood risk listHP4 1JU: not on the flood risk listHP4 1JZ: not on the flood risk listHP4 1LA: not on the flood risk listHP4 1LB: not on the flood risk listHP4 1LE: not on the flood risk listHP4 1LJ: not on the flood risk listHP4 1LL: not on the flood risk listHP4 1LN: not on the flood risk listHP4 1LP: not on the flood risk listHP4 1LR: not on the flood risk listHP4 1LS: not on the flood risk listHP4 1LT: not on the flood risk listHP4 1LU: not on the flood risk listHP4 1LW: not on the flood risk listHP4 1LX: not on the flood risk listHP4 1LY: not on the flood risk listHP4 1LZ: not on the flood risk listHP4 1NA: not on the flood risk listHP4 1NB: not on the flood risk listHP4 1ND: not on the flood risk listHP4 1NF: not on the flood risk listHP4 1NJ: not on the flood risk listHP4 1NN: not on the flood risk listHP4 1NP: not on the flood risk listHP4 1NR: not on the flood risk listHP4 1NS: not on the flood risk listHP4 1NT: not on the flood risk listHP4 1NU: not on the flood risk listHP4 1NW: not on the flood risk listHP4 1NX: not on the flood risk listHP4 1NY: not on the flood risk listHP4 1NZ: not on the flood risk listHP4 1PA: not on the flood risk listHP4 1PB: not on the flood risk listHP4 1PE: not on the flood risk listHP4 1PF: not on the flood risk listHP4 1PH: not on the flood risk listHP4 1PL: not on the flood risk listHP4 1PN: not on the flood risk listHP4 1PP: not on the flood risk listHP4 1PQ: not on the flood risk listHP4 1PR: not on the flood risk listHP4 1PS: not on the flood risk listHP4 1PT: not on the flood risk listHP4 1PU: not on the flood risk listHP4 1PW: not on the flood risk listHP4 1PX: not on the flood risk listHP4 1QE: not on the flood risk listHP4 1QG: not on the flood risk listHP4 1QJ: not on the flood risk listHP4 1QL: not on the flood risk listHP4 1QN: not on the flood risk listHP4 1QP: not on the flood risk listHP4 1QQ: not on the flood risk listHP4 1QR: not on the flood risk listHP4 1QS: not on the flood risk listHP4 1QT: not on the flood risk listHP4 1QU: not on the flood risk listHP4 1QW: not on the flood risk listHP4 1QX: not on the flood risk listHP4 1QZ: not on the flood risk listHP4 1RB: not on the flood risk listHP4 1RD: not on the flood risk listHP4 1RE: not on the flood risk listHP4 1RF: not on the flood risk listHP4 1RG: not on the flood risk listHP4 1RH: not on the flood risk listHP4 1RJ: not on the flood risk listHP4 1RL: not on the flood risk listHP4 1RN: not on the flood risk listHP4 1RP: not on the flood risk listHP4 1RQ: not on the flood risk listHP4 1RR: not on the flood risk listHP4 1RS: not on the flood risk listHP4 1RW: not on the flood risk listHP4 1SA: not on the flood risk listHP4 1SB: not on the flood risk listHP4 1SD: not on the flood risk listHP4 1SE: not on the flood risk listHP4 1SF: not on the flood risk listHP4 1SY: not on the flood risk listHP4 1TB: not on the flood risk listHP4 1TD: not on the flood risk listHP4 1TE: not on the flood risk listHP4 1TF: not on the flood risk listHP4 1TP: not on the flood risk listHP4 1UH: not on the flood risk listHP4 1ZZ: not on the flood risk listHP4 2AE: not on the flood risk listHP4 2AL: not on the flood risk listHP4 2AS: not on the flood risk listHP4 2AX: not on the flood risk listHP4 2BG: not on the flood risk listHP4 2BJ: not on the flood risk listHP4 2BL: not on the flood risk listHP4 2BP: not on the flood risk listHP4 2BQ: not on the flood risk listHP4 2BS: not on the flood risk listHP4 2BT: not on the flood risk listHP4 2BU: not on the flood risk listHP4 2BW: not on the flood risk listHP4 2BY: not on the flood risk listHP4 2DA: not on the flood risk listHP4 2DD: not on the flood risk listHP4 2DH: not on the flood risk listHP4 2DJ: not on the flood risk listHP4 2DP: not on the flood risk listHP4 2DQ: not on the flood risk listHP4 2DT: not on the flood risk listHP4 2ED: not on the flood risk listHP4 2EF: not on the flood risk listHP4 2EG: not on the flood risk listHP4 2EH: not on the flood risk listHP4 2EJ: not on the flood risk listHP4 2EQ: not on the flood risk listHP4 2ER: not on the flood risk listHP4 2ES: not on the flood risk listHP4 2EU: not on the flood risk listHP4 2EW: not on the flood risk listHP4 2EX: not on the flood risk listHP4 2EY: not on the flood risk listHP4 2FQ: not on the flood risk listHP4 2FU: not on the flood risk listHP4 2FW: not on the flood risk listHP4 2FY: not on the flood risk listHP4 2GA: not on the flood risk listHP4 2GD: not on the flood risk listHP4 2GE: not on the flood risk listHP4 2GF: not on the flood risk listHP4 2GH: not on the flood risk listHP4 2GJ: not on the flood risk listHP4 2GP: not on the flood risk listHP4 2GR: not on the flood risk listHP4 2GS: not on the flood risk listHP4 2GT: not on the flood risk listHP4 2GX: not on the flood risk listHP4 2HB: not on the flood risk listHP4 2HG: not on the flood risk listHP4 2HH: not on the flood risk listHP4 2HJ: not on the flood risk listHP4 2HL: not on the flood risk listHP4 2HP: not on the flood risk listHP4 2HS: not on the flood risk listHP4 2HU: not on the flood risk listHP4 2HW: not on the flood risk listHP4 2HX: not on the flood risk listHP4 2HY: not on the flood risk listHP4 2JG: not on the flood risk listHP4 2JH: not on the flood risk listHP4 2JJ: not on the flood risk listHP4 2JL: not on the flood risk listHP4 2JP: not on the flood risk listHP4 2JQ: not on the flood risk listHP4 2JR: not on the flood risk listHP4 2JS: not on the flood risk listHP4 2JW: not on the flood risk listHP4 2LA: not on the flood risk listHP4 2LB: not on the flood risk listHP4 2LE: not on the flood risk listHP4 2LF: not on the flood risk listHP4 2LG: not on the flood risk listHP4 2LH: not on the flood risk listHP4 2LJ: not on the flood risk listHP4 2LL: not on the flood risk listHP4 2LN: not on the flood risk listHP4 2LP: not on the flood risk listHP4 2LQ: not on the flood risk listHP4 2LS: not on the flood risk listHP4 2NB: not on the flood risk listHP4 2ND: not on the flood risk listHP4 2NE: not on the flood risk listHP4 2NF: not on the flood risk listHP4 2NH: not on the flood risk listHP4 2NJ: not on the flood risk listHP4 2NL: not on the flood risk listHP4 2NN: not on the flood risk listHP4 2NP: not on the flood risk listHP4 2NR: not on the flood risk listHP4 2NU: not on the flood risk listHP4 2NW: not on the flood risk listHP4 2NX: not on the flood risk listHP4 2PA: not on the flood risk listHP4 2PB: not on the flood risk listHP4 2PD: not on the flood risk listHP4 2PE: not on the flood risk listHP4 2PF: not on the flood risk listHP4 2PG: not on the flood risk listHP4 2PH: not on the flood risk listHP4 2PJ: not on the flood risk listHP4 2PL: not on the flood risk listHP4 2PN: not on the flood risk listHP4 2PP: not on the flood risk listHP4 2PQ: not on the flood risk listHP4 2PR: not on the flood risk listHP4 2PS: not on the flood risk listHP4 2PT: not on the flood risk listHP4 2PU: not on the flood risk listHP4 2PX: not on the flood risk listHP4 2QA: not on the flood risk listHP4 2QB: not on the flood risk listHP4 2QD: not on the flood risk listHP4 2QF: not on the flood risk listHP4 2QG: not on the flood risk listHP4 2QH: not on the flood risk listHP4 2QJ: not on the flood risk listHP4 2QL: not on the flood risk listHP4 2QQ: not on the flood risk listHP4 2QR: not on the flood risk listHP4 2QS: not on the flood risk listHP4 2QU: not on the flood risk listHP4 2QW: not on the flood risk listHP4 2QX: not on the flood risk listHP4 2QY: not on the flood risk listHP4 2QZ: not on the flood risk listHP4 2RA: not on the flood risk listHP4 2RB: not on the flood risk listHP4 2RD: not on the flood risk listHP4 2RF: not on the flood risk listHP4 2RG: not on the flood risk listHP4 2RH: not on the flood risk listHP4 2RP: not on the flood risk listHP4 2RQ: not on the flood risk listHP4 2RR: not on the flood risk listHP4 2RT: not on the flood risk listHP4 2RX: not on the flood risk listHP4 2RY: not on the flood risk listHP4 2RZ: not on the flood risk listHP4 2SD: not on the flood risk listHP4 2SE: not on the flood risk listHP4 2SF: not on the flood risk listHP4 2SG: not on the flood risk listHP4 2SH: not on the flood risk listHP4 2SL: not on the flood risk listHP4 2SN: not on the flood risk listHP4 2SP: not on the flood risk listHP4 2SQ: not on the flood risk listHP4 2ST: not on the flood risk listHP4 2SU: not on the flood risk listHP4 2SX: not on the flood risk listHP4 2SY: not on the flood risk listHP4 2SZ: not on the flood risk listHP4 2TS: not on the flood risk listHP4 2UB: not on the flood risk listHP4 2WG: not on the flood risk listHP4 2XT: not on the flood risk listHP4 3AA: not on the flood risk listHP4 3AD: not on the flood risk listHP4 3AE: not on the flood risk listHP4 3AF: not on the flood risk listHP4 3AH: not on the flood risk listHP4 3AJ: not on the flood risk listHP4 3AN: not on the flood risk listHP4 3AQ: not on the flood risk listHP4 3AR: not on the flood risk listHP4 3AS: not on the flood risk listHP4 3AU: not on the flood risk listHP4 3AY: not on the flood risk listHP4 3BB: not on the flood risk listHP4 3BD: not on the flood risk listHP4 3BE: not on the flood risk listHP4 3BF: not on the flood risk listHP4 3BG: not on the flood risk listHP4 3BH: not on the flood risk listHP4 3BJ: not on the flood risk listHP4 3BL: not on the flood risk listHP4 3BN: not on the flood risk listHP4 3BP: not on the flood risk listHP4 3BS: not on the flood risk listHP4 3BT: not on the flood risk listHP4 3BU: not on the flood risk listHP4 3BW: not on the flood risk listHP4 3BX: not on the flood risk listHP4 3BZ: not on the flood risk listHP4 3DA: not on the flood risk listHP4 3DD: not on the flood risk listHP4 3DE: not on the flood risk listHP4 3DF: not on the flood risk listHP4 3DH: not on the flood risk listHP4 3DJ: not on the flood risk listHP4 3DP: not on the flood risk listHP4 3DQ: not on the flood risk listHP4 3DR: not on the flood risk listHP4 3DS: not on the flood risk listHP4 3DT: not on the flood risk listHP4 3DU: not on the flood risk listHP4 3DW: not on the flood risk listHP4 3DX: not on the flood risk listHP4 3DY: not on the flood risk listHP4 3EA: not on the flood risk listHP4 3EB: not on the flood risk listHP4 3EE: not on the flood risk listHP4 3EF: not on the flood risk listHP4 3EG: not on the flood risk listHP4 3EH: not on the flood risk listHP4 3EN: not on the flood risk listHP4 3ER: not on the flood risk listHP4 3ES: not on the flood risk listHP4 3EX: not on the flood risk listHP4 3FB: not on the flood risk listHP4 3FD: not on the flood risk listHP4 3FJ: not on the flood risk listHP4 3FN: not on the flood risk listHP4 3FQ: not on the flood risk listHP4 3FU: not on the flood risk listHP4 3FY: not on the flood risk listHP4 3GB: not on the flood risk listHP4 3GW: not on the flood risk listHP4 3GY: not on the flood risk listHP4 3HN: not on the flood risk listHP4 3HP: not on the flood risk listHP4 3HR: not on the flood risk listHP4 3HT: not on the flood risk listHP4 3HU: not on the flood risk listHP4 3HY: not on the flood risk listHP4 3HZ: not on the flood risk listHP4 3JA: not on the flood risk listHP4 3JB: not on the flood risk listHP4 3JD: not on the flood risk listHP4 3JE: not on the flood risk listHP4 3JF: not on the flood risk listHP4 3JG: not on the flood risk listHP4 3JH: not on the flood risk listHP4 3JJ: not on the flood risk listHP4 3JP: not on the flood risk listHP4 3JR: not on the flood risk listHP4 3JS: not on the flood risk listHP4 3JT: not on the flood risk listHP4 3JU: not on the flood risk listHP4 3JX: not on the flood risk listHP4 3JY: not on the flood risk listHP4 3JZ: not on the flood risk listHP4 3LA: not on the flood risk listHP4 3LB: not on the flood risk listHP4 3LD: not on the flood risk listHP4 3LE: not on the flood risk listHP4 3LF: not on the flood risk listHP4 3LG: not on the flood risk listHP4 3LH: not on the flood risk listHP4 3LJ: not on the flood risk listHP4 3LN: not on the flood risk listHP4 3LQ: not on the flood risk listHP4 3LR: not on the flood risk listHP4 3LS: not on the flood risk listHP4 3LU: not on the flood risk listHP4 3LW: not on the flood risk listHP4 3LX: not on the flood risk listHP4 3LZ: not on the flood risk listHP4 3NA: not on the flood risk listHP4 3NB: not on the flood risk listHP4 3ND: not on the flood risk listHP4 3NE: not on the flood risk listHP4 3NF: not on the flood risk listHP4 3NG: not on the flood risk listHP4 3NH: not on the flood risk listHP4 3NJ: not on the flood risk listHP4 3NN: not on the flood risk listHP4 3NP: not on the flood risk listHP4 3NQ: not on the flood risk listHP4 3NR: not on the flood risk listHP4 3NS: not on the flood risk listHP4 3NT: not on the flood risk listHP4 3NU: not on the flood risk listHP4 3NW: not on the flood risk listHP4 3NX: not on the flood risk listHP4 3NY: not on the flood risk listHP4 3NZ: not on the flood risk listHP4 3PA: not on the flood risk listHP4 3PB: not on the flood risk listHP4 3PD: not on the flood risk listHP4 3PE: not on the flood risk listHP4 3PF: not on the flood risk listHP4 3PG: not on the flood risk listHP4 3PH: not on the flood risk listHP4 3PL: not on the flood risk listHP4 3PN: not on the flood risk listHP4 3PP: not on the flood risk listHP4 3PR: not on the flood risk listHP4 3PS: not on the flood risk listHP4 3PW: not on the flood risk listHP4 3PX: not on the flood risk listHP4 3PY: not on the flood risk listHP4 3PZ: not on the flood risk listHP4 3QB: not on the flood risk listHP4 3QD: not on the flood risk listHP4 3QE: not on the flood risk listHP4 3QG: not on the flood risk listHP4 3QL: not on the flood risk listHP4 3QN: not on the flood risk listHP4 3QR: not on the flood risk listHP4 3QS: not on the flood risk listHP4 3QT: not on the flood risk listHP4 3QU: not on the flood risk listHP4 3QX: not on the flood risk listHP4 3RD: not on the flood risk listHP4 3RE: not on the flood risk listHP4 3RF: not on the flood risk listHP4 3RG: not on the flood risk listHP4 3RH: not on the flood risk listHP4 3RJ: not on the flood risk listHP4 3RL: not on the flood risk listHP4 3RN: not on the flood risk listHP4 3RP: not on the flood risk listHP4 3RQ: not on the flood risk listHP4 3RR: not on the flood risk listHP4 3RS: not on the flood risk listHP4 3RT: not on the flood risk listHP4 3RW: not on the flood risk listHP4 3RX: not on the flood risk listHP4 3RY: not on the flood risk listHP4 3SB: not on the flood risk listHP4 3SE: not on the flood risk listHP4 3SF: not on the flood risk listHP4 3SG: not on the flood risk listHP4 3SH: not on the flood risk listHP4 3SJ: not on the flood risk listHP4 3SL: not on the flood risk listHP4 3SN: not on the flood risk listHP4 3SS: not on the flood risk listHP4 3ST: not on the flood risk listHP4 3SX: not on the flood risk listHP4 3SY: not on the flood risk listHP4 3SZ: not on the flood risk listHP4 3TA: not on the flood risk listHP4 3TB: not on the flood risk listHP4 3TE: not on the flood risk listHP4 3TG: not on the flood risk listHP4 3TH: not on the flood risk listHP4 3TL: not on the flood risk listHP4 3TN: not on the flood risk listHP4 3TP: not on the flood risk listHP4 3TR: not on the flood risk listHP4 3TS: not on the flood risk listHP4 3TT: not on the flood risk listHP4 3TU: not on the flood risk listHP4 3TX: not on the flood risk listHP4 3TY: not on the flood risk listHP4 3TZ: not on the flood risk listHP4 3UA: not on the flood risk listHP4 3UB: not on the flood risk listHP4 3UD: not on the flood risk listHP4 3UE: not on the flood risk listHP4 3UF: not on the flood risk listHP4 3UG: not on the flood risk listHP4 3UJ: not on the flood risk listHP4 3UQ: not on the flood risk listHP4 3UR: not on the flood risk listHP4 3UT: not on the flood risk listHP4 3UU: not on the flood risk listHP4 3XE: not on the flood risk listHP4 3XJ: not on the flood risk listHP4 3XL: not on the flood risk listHP4 3XZ: not on the flood risk listHP4 3YA: not on the flood risk listHP4 3YD: not on the flood risk listHP4 3YE: not on the flood risk listHP4 3YS: not on the flood risk listHP4 3YT: not on the flood risk listHP4 3YX: not on the flood risk listHP4 1DP: low flood risk at worstHP4 1FG: low flood risk at worstHP4 2DX: low flood risk at worstHP4 2DW: low flood risk at worstHP4 2HD: low flood risk at worstHP4 3QW: low flood risk at worstHP4 3XD: low flood risk at worstHP4 3XA: low flood risk at worstHP4 1FE: medium flood risk at worstHP4 2BA: medium flood risk at worstHP4 3XP: medium flood risk at worstHP4 1DW: high flood riskHP4 1SX: high flood riskHP4 2AA: high flood riskHP4 2FN: high flood riskHP4 2DZ: high flood riskHP4 2EA: high flood riskHP4 2EB: high flood riskHP4 2JE: high flood riskHP4 2HA: high flood riskHP4 2NS: high flood riskHP4 2NT: high flood riskHP4 2RS: high flood riskHP4 3TF: high flood riskHP4 3XH: high flood risk BerkhamstedPitstone 5 postcodes at high or medium risk, outlined: this goes to HP4 2JE, the one with most homes and businesses at high risk5 postcodes at high or medium risk Map of every postcode in HP4, by flood risk Of the 737 postcodes in HP4 that ONS places, 16 have a home or business at high risk, 3 are at medium risk at worst, 8 are at low risk at worst and 710 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. Places named: Berkhamsted. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. A416 Berkhamsted
  • A home or business at high risk: 16
  • At medium risk at worst: 3
  • At low risk at worst: 8
  • At very low risk only: 0
  • Not on the at-risk list: 710
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 737 postcodes in HP4 that ONS places, 16 have a home or business at high risk, 3 are at medium risk at worst, 8 are at low risk at worst and 710 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.

The middle of its postcodes: latitude 51.7680, longitude -0.5690. 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

16 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.

HP4 2JE12 at high riskHP4 2HA9 at high riskHP4 1DW5 at high riskHP4 2EB5 at high riskHP4 3TF3 at high riskHP4 1SX3 at high riskHP4 2EA2 at high riskHP4 2FN2 at high riskHP4 2NS2 at high riskHP4 2NT2 at high riskHP4 2RS2 at high riskHP4 2UA2 at high risk

Where the postcodes at high or medium risk lie together

  • 5 postcodes at high or medium risk, outlined on the map. HP4 2JE, is the one with most homes and businesses at high risk.

What broadband can you get in HP4?

Ofcom reports on 726 of the 737 postcodes in HP4. At 366 of them every home and business can get gigabit broadband, and at 8 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit366 of 726
Postcodes where every home can get superfast656 of 726
Postcodes where some cannot get decent broadband8 of 726

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 HP4 at risk of flooding?

27 of the 737 postcodes in HP4 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 62 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 27 of 737 postcodes High: 53Medium: 9Low: 108Very low: 3

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 HP4?

Homes in HP4 sold for a typical £710,000 in the 12 months to August 2026, across 303 sales, up 13.6% on the 12 months before, HM Land Registry's figures show.

£710,000 typical price, the 12 months to August 2026
12 months to August 2025
£625,000
12 months to August 2026
£710,000

▲ up 13.6% on the 12 months before

Detached£1,050,000 96 sales
Semi-detached£667,500 69 sales
Terraced£604,750 78 sales
Flat or maisonette£360,000 60 sales

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 HP4

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

HP4 1202 postcodesHP4 2239 postcodesHP4 3289 postcodesHP4 97 postcodes
UK postcode format explained

Places in HP4

Towns and villages with postcodes in HP4, and how many each has here.

Berkhamsted postcodes,584

Who covers HP4

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 Berkhamsted712
  • Aylesbury19
  • Chesham and Amersham2
  • Luton South and South Bedfordshire2
  • Mid Buckinghamshire2

Police force areas

  • Hertfordshire712
  • Thames Valley23
  • Bedfordshire2

Next to HP4

HP3 postcode district HP5 postcode district All HP districts Berkhamsted postcodes

"Next to" is by number: the districts before and after HP4 in the HP area.

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