HP4 1 postcode sector in the HP4 district

HP4 1 is a sector of the HP4 district: every postcode that starts HP4 1. It has 202 postcodes in use, 7 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 HP4 1 sector, by flood risk

Map of every postcode in the HP4 1 sector, by flood risk Of the 202 postcodes in the HP4 1 sector that ONS places, 2 have a home or business at high risk, 1 are at medium risk at worst, 2 are at low risk at worst and 197 are not on the Environment Agency's at-risk list. Places named: Berkhamsted. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A41 HP4 1AA: not on the flood risk listHP4 1AB: not on the flood risk listHP4 1AD: not on the flood risk listHP4 1AE: not on the flood risk listHP4 1AH: 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 1BU: not on the flood risk listHP4 1BX: not on the flood risk listHP4 1BY: 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 1DF: 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 1DQ: 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 1ES: 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 1FB: not on the flood risk listHP4 1FF: not on the flood risk listHP4 1FJ: 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 1FS: 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 1HU: 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 1JN: not on the flood risk listHP4 1JP: not on the flood risk listHP4 1JQ: not on the flood risk listHP4 1JR: 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 1JW: not on the flood risk listHP4 1JX: not on the flood risk listHP4 1JY: 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 1NE: 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 1PJ: 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 1QY: 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 1TA: 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 1TH: not on the flood risk listHP4 1TJ: not on the flood risk listHP4 1TP: not on the flood risk listHP4 1UB: not on the flood risk listHP4 1UH: not on the flood risk listHP4 1DP: low flood risk at worstHP4 1FG: low flood risk at worstHP4 1FE: medium flood risk at worstHP4 1DW: high flood riskHP4 1SX: high flood risk Berkhamsted Map of every postcode in the HP4 1 sector, by flood risk Of the 202 postcodes in the HP4 1 sector that ONS places, 2 have a home or business at high risk, 1 are at medium risk at worst, 2 are at low risk at worst and 197 are not on the Environment Agency's at-risk list. Places named: Berkhamsted. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. Berkhamsted
  • A home or business at high risk: 2
  • At medium risk at worst: 1
  • At low risk at worst: 2
  • At very low risk only: 0
  • Not on the at-risk list: 197

Of the 202 postcodes in the HP4 1 sector that ONS places, 2 have a home or business at high risk, 1 are at medium risk at worst, 2 are at low risk at worst and 197 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

The postcodes at high risk

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

HP4 1DW5 at high riskHP4 1SX3 at high risk

What do homes sell for in HP4 1?

Homes in HP4 1 sold for a typical £680,000 in the 12 months to August 2026, across 74 sales, up 10.6% on the 12 months before, HM Land Registry's figures show.

£680,000 typical price, the 12 months to August 2026
£615,000 12 months to August 2025
▲ up 10.6% on the 12 months before
  • Detached £890,000 28 sales
  • Semi-detached £640,000 13 sales
  • Terraced £767,500 12 sales
  • Flat or maisonette £285,000 21 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 HP4 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 HP4 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.

HP4 1AAHP4 1ABHP4 1ADHP4 1AEHP4 1AFHP4 1AGHP4 1AHHP4 1AJHP4 1ALHP4 1AQHP4 1ARHP4 1ATHP4 1BBHP4 1BEHP4 1BJHP4 1BLHP4 1BSHP4 1BTHP4 1BUHP4 1BWHP4 1BXHP4 1BYHP4 1BZHP4 1DAHP4 1DBHP4 1DDHP4 1DFHP4 1DHHP4 1DJHP4 1DLHP4 1DNHP4 1DPHP4 1DQHP4 1DRHP4 1DSHP4 1DTHP4 1DUHP4 1DWHP4 1DXHP4 1DYHP4 1DZHP4 1EAHP4 1EBHP4 1EDHP4 1EEHP4 1EFHP4 1EGHP4 1EHHP4 1EQHP4 1ESHP4 1EUHP4 1EXHP4 1EYHP4 1EZHP4 1FBHP4 1FDHP4 1FEHP4 1FFHP4 1FGHP4 1FHHP4 1FJHP4 1FLHP4 1FNHP4 1FPHP4 1FQHP4 1FRHP4 1FSHP4 1FTHP4 1HAHP4 1HBHP4 1HEHP4 1HFHP4 1HHHP4 1HJHP4 1HLHP4 1HNHP4 1HPHP4 1HQHP4 1HRHP4 1HSHP4 1HTHP4 1HUHP4 1HXHP4 1HYHP4 1HZHP4 1JAHP4 1JBHP4 1JDHP4 1JEHP4 1JFHP4 1JGHP4 1JHHP4 1JJHP4 1JLHP4 1JNHP4 1JPHP4 1JQHP4 1JRHP4 1JSHP4 1JTHP4 1JUHP4 1JWHP4 1JXHP4 1JYHP4 1JZHP4 1LAHP4 1LBHP4 1LEHP4 1LHHP4 1LJHP4 1LLHP4 1LNHP4 1LPHP4 1LRHP4 1LSHP4 1LTHP4 1LUHP4 1LWHP4 1LXHP4 1LYHP4 1LZHP4 1NAHP4 1NBHP4 1NDHP4 1NEHP4 1NFHP4 1NJHP4 1NNHP4 1NPHP4 1NRHP4 1NSHP4 1NTHP4 1NUHP4 1NWHP4 1NXHP4 1NYHP4 1NZHP4 1PAHP4 1PBHP4 1PDHP4 1PEHP4 1PFHP4 1PGHP4 1PHHP4 1PJHP4 1PLHP4 1PNHP4 1PPHP4 1PQHP4 1PRHP4 1PSHP4 1PTHP4 1PUHP4 1PWHP4 1PXHP4 1QEHP4 1QGHP4 1QJHP4 1QLHP4 1QNHP4 1QPHP4 1QQHP4 1QRHP4 1QSHP4 1QTHP4 1QUHP4 1QWHP4 1QXHP4 1QYHP4 1QZHP4 1RBHP4 1RDHP4 1REHP4 1RFHP4 1RGHP4 1RHHP4 1RJHP4 1RLHP4 1RNHP4 1RPHP4 1RQHP4 1RRHP4 1RSHP4 1RWHP4 1SAHP4 1SBHP4 1SDHP4 1SEHP4 1SFHP4 1SXHP4 1SYHP4 1TAHP4 1TBHP4 1TDHP4 1TEHP4 1TFHP4 1THHP4 1TJHP4 1TPHP4 1UBHP4 1UHHP4 1ZZ

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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