HP4 3 postcode sector in the HP4 district

HP4 3 is a sector of the HP4 district: every postcode that starts HP4 3. It has 289 postcodes in use, 15 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 3 sector, by flood risk

Map of every postcode in the HP4 3 sector, by flood risk Of the 289 postcodes in the HP4 3 sector that ONS places, 2 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 283 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 3AA: not on the flood risk listHP4 3AB: 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 3AG: not on the flood risk listHP4 3AH: not on the flood risk listHP4 3AJ: not on the flood risk listHP4 3AL: not on the flood risk listHP4 3AN: not on the flood risk listHP4 3AP: 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 3AT: not on the flood risk listHP4 3AU: not on the flood risk listHP4 3AX: not on the flood risk listHP4 3AY: not on the flood risk listHP4 3AZ: 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 3BQ: 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 3DB: 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 3DG: not on the flood risk listHP4 3DH: not on the flood risk listHP4 3DJ: not on the flood risk listHP4 3DN: 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 3DZ: not on the flood risk listHP4 3EA: not on the flood risk listHP4 3EB: not on the flood risk listHP4 3ED: 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 3EJ: not on the flood risk listHP4 3EL: not on the flood risk listHP4 3EN: not on the flood risk listHP4 3EP: not on the flood risk listHP4 3EQ: not on the flood risk listHP4 3ER: not on the flood risk listHP4 3ES: not on the flood risk listHP4 3EW: not on the flood risk listHP4 3EX: not on the flood risk listHP4 3EY: not on the flood risk listHP4 3EZ: not on the flood risk listHP4 3FB: not on the flood risk listHP4 3FD: not on the flood risk listHP4 3FG: 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 3FW: 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 3HA: not on the flood risk listHP4 3HB: not on the flood risk listHP4 3HD: not on the flood risk listHP4 3HE: not on the flood risk listHP4 3HH: not on the flood risk listHP4 3HN: not on the flood risk listHP4 3HP: not on the flood risk listHP4 3HQ: 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 3JN: not on the flood risk listHP4 3JP: not on the flood risk listHP4 3JQ: 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 3LL: not on the flood risk listHP4 3LN: not on the flood risk listHP4 3LP: 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 3NL: 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 3PJ: 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 3PQ: not on the flood risk listHP4 3PR: not on the flood risk listHP4 3PS: not on the flood risk listHP4 3PT: 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 3QA: 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 3QF: not on the flood risk listHP4 3QG: not on the flood risk listHP4 3QH: not on the flood risk listHP4 3QL: not on the flood risk listHP4 3QN: not on the flood risk listHP4 3QP: not on the flood risk listHP4 3QQ: 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 3QY: not on the flood risk listHP4 3QZ: not on the flood risk listHP4 3RA: not on the flood risk listHP4 3RB: 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 3RU: 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 3RZ: not on the flood risk listHP4 3SA: not on the flood risk listHP4 3SB: not on the flood risk listHP4 3SD: 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 3SP: not on the flood risk listHP4 3SQ: not on the flood risk listHP4 3SR: not on the flood risk listHP4 3SS: not on the flood risk listHP4 3ST: not on the flood risk listHP4 3SW: 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 3TD: 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 3TQ: 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 3XB: not on the flood risk listHP4 3XE: not on the flood risk listHP4 3XG: not on the flood risk listHP4 3XJ: not on the flood risk listHP4 3XL: not on the flood risk listHP4 3XN: not on the flood risk listHP4 3XR: not on the flood risk listHP4 3XZ: not on the flood risk listHP4 3YD: not on the flood risk listHP4 3YE: not on the flood risk listHP4 3YF: not on the flood risk listHP4 3YL: not on the flood risk listHP4 3YS: not on the flood risk listHP4 3YT: not on the flood risk listHP4 3YU: not on the flood risk listHP4 3YX: not on the flood risk listHP4 3YY: not on the flood risk listHP4 3YZ: not on the flood risk listHP4 3ZE: not on the flood risk listHP4 3QW: low flood risk at worstHP4 3XA: low flood risk at worstHP4 3XD: low flood risk at worstHP4 3XP: medium flood risk at worstHP4 3TF: high flood riskHP4 3XH: high flood risk Berkhamsted Map of every postcode in the HP4 3 sector, by flood risk Of the 289 postcodes in the HP4 3 sector that ONS places, 2 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 283 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: 3
  • At very low risk only: 0
  • Not on the at-risk list: 283

Of the 289 postcodes in the HP4 3 sector that ONS places, 2 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 283 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 3TF3 at high riskHP4 3XH1 at high risk

What do homes sell for in HP4 3?

Homes in HP4 3 sold for a typical £750,000 in the 12 months to August 2026, across 121 sales, up 14.5% on the 12 months before, HM Land Registry's figures show.

£750,000 typical price, the 12 months to August 2026
£655,000 12 months to August 2025
▲ up 14.5% on the 12 months before
  • Detached £1,100,000 46 sales
  • Semi-detached £645,000 34 sales
  • Terraced £675,000 29 sales
  • Flat or maisonette £415,000 12 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 3. 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 3

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 3AAHP4 3ABHP4 3ADHP4 3AEHP4 3AFHP4 3AGHP4 3AHHP4 3AJHP4 3ALHP4 3ANHP4 3APHP4 3AQHP4 3ARHP4 3ASHP4 3ATHP4 3AUHP4 3AWHP4 3AXHP4 3AYHP4 3AZHP4 3BAHP4 3BBHP4 3BDHP4 3BEHP4 3BFHP4 3BGHP4 3BHHP4 3BJHP4 3BLHP4 3BNHP4 3BPHP4 3BQHP4 3BSHP4 3BTHP4 3BUHP4 3BWHP4 3BXHP4 3BZHP4 3DAHP4 3DBHP4 3DDHP4 3DEHP4 3DFHP4 3DGHP4 3DHHP4 3DJHP4 3DNHP4 3DPHP4 3DQHP4 3DRHP4 3DSHP4 3DTHP4 3DUHP4 3DWHP4 3DXHP4 3DYHP4 3DZHP4 3EAHP4 3EBHP4 3EDHP4 3EEHP4 3EFHP4 3EGHP4 3EHHP4 3EJHP4 3ELHP4 3ENHP4 3EPHP4 3EQHP4 3ERHP4 3ESHP4 3ETHP4 3EWHP4 3EXHP4 3EYHP4 3EZHP4 3FBHP4 3FDHP4 3FGHP4 3FJHP4 3FNHP4 3FQHP4 3FUHP4 3FWHP4 3FYHP4 3GBHP4 3GWHP4 3GYHP4 3HAHP4 3HBHP4 3HDHP4 3HEHP4 3HHHP4 3HLHP4 3HNHP4 3HPHP4 3HQHP4 3HRHP4 3HTHP4 3HUHP4 3HXHP4 3HYHP4 3HZHP4 3JAHP4 3JBHP4 3JDHP4 3JEHP4 3JFHP4 3JGHP4 3JHHP4 3JJHP4 3JNHP4 3JPHP4 3JQHP4 3JRHP4 3JSHP4 3JTHP4 3JUHP4 3JXHP4 3JYHP4 3JZHP4 3LAHP4 3LBHP4 3LDHP4 3LEHP4 3LFHP4 3LGHP4 3LHHP4 3LJHP4 3LLHP4 3LNHP4 3LPHP4 3LQHP4 3LRHP4 3LSHP4 3LUHP4 3LWHP4 3LXHP4 3LZHP4 3NAHP4 3NBHP4 3NDHP4 3NEHP4 3NFHP4 3NGHP4 3NHHP4 3NJHP4 3NLHP4 3NNHP4 3NPHP4 3NQHP4 3NRHP4 3NSHP4 3NTHP4 3NUHP4 3NWHP4 3NXHP4 3NYHP4 3NZHP4 3PAHP4 3PBHP4 3PDHP4 3PEHP4 3PFHP4 3PGHP4 3PHHP4 3PJHP4 3PLHP4 3PNHP4 3PPHP4 3PQHP4 3PRHP4 3PSHP4 3PTHP4 3PWHP4 3PXHP4 3PYHP4 3PZHP4 3QAHP4 3QBHP4 3QDHP4 3QEHP4 3QFHP4 3QGHP4 3QHHP4 3QLHP4 3QNHP4 3QPHP4 3QQHP4 3QRHP4 3QSHP4 3QTHP4 3QUHP4 3QWHP4 3QXHP4 3QYHP4 3QZHP4 3RAHP4 3RBHP4 3RDHP4 3REHP4 3RFHP4 3RGHP4 3RHHP4 3RJHP4 3RLHP4 3RNHP4 3RPHP4 3RQHP4 3RRHP4 3RSHP4 3RTHP4 3RUHP4 3RWHP4 3RXHP4 3RYHP4 3RZHP4 3SAHP4 3SBHP4 3SDHP4 3SEHP4 3SFHP4 3SGHP4 3SHHP4 3SJHP4 3SLHP4 3SNHP4 3SPHP4 3SQHP4 3SRHP4 3SSHP4 3STHP4 3SWHP4 3SXHP4 3SYHP4 3SZHP4 3TAHP4 3TBHP4 3TDHP4 3TEHP4 3TFHP4 3TGHP4 3THHP4 3TLHP4 3TNHP4 3TPHP4 3TQHP4 3TRHP4 3TSHP4 3TTHP4 3TUHP4 3TXHP4 3TYHP4 3TZHP4 3UAHP4 3UBHP4 3UDHP4 3UEHP4 3UFHP4 3UGHP4 3UJHP4 3UQHP4 3URHP4 3UTHP4 3UUHP4 3XAHP4 3XBHP4 3XDHP4 3XEHP4 3XGHP4 3XHHP4 3XJHP4 3XLHP4 3XNHP4 3XPHP4 3XRHP4 3XZHP4 3YAHP4 3YDHP4 3YEHP4 3YFHP4 3YLHP4 3YSHP4 3YTHP4 3YUHP4 3YXHP4 3YYHP4 3YZHP4 3ZE

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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