HP23 4 postcode sector in the HP23 district

HP23 4 is a sector of the HP23 district: every postcode that starts HP23 4. 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 HP23 4 sector, by flood risk

Map of every postcode in the HP23 4 sector, by flood risk Of the 202 postcodes in the HP23 4 sector that ONS places, 9 have a home or business at high risk, 2 are at medium risk at worst, 2 are at low risk at worst and 189 are not on the Environment Agency's at-risk list. Places named: Tring, Aston Clinton. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A41 HP23 4AB: not on the flood risk listHP23 4AF: not on the flood risk listHP23 4AG: not on the flood risk listHP23 4AJ: not on the flood risk listHP23 4AL: not on the flood risk listHP23 4AN: not on the flood risk listHP23 4AP: not on the flood risk listHP23 4AR: not on the flood risk listHP23 4AS: not on the flood risk listHP23 4AT: not on the flood risk listHP23 4AW: not on the flood risk listHP23 4AX: not on the flood risk listHP23 4AY: not on the flood risk listHP23 4AZ: not on the flood risk listHP23 4BA: not on the flood risk listHP23 4BB: not on the flood risk listHP23 4BE: not on the flood risk listHP23 4BH: not on the flood risk listHP23 4BJ: not on the flood risk listHP23 4BN: not on the flood risk listHP23 4BQ: not on the flood risk listHP23 4BS: not on the flood risk listHP23 4BT: not on the flood risk listHP23 4BU: not on the flood risk listHP23 4BW: not on the flood risk listHP23 4BX: not on the flood risk listHP23 4BZ: not on the flood risk listHP23 4DA: not on the flood risk listHP23 4DB: not on the flood risk listHP23 4DD: not on the flood risk listHP23 4DE: not on the flood risk listHP23 4DF: not on the flood risk listHP23 4DG: not on the flood risk listHP23 4DH: not on the flood risk listHP23 4DJ: not on the flood risk listHP23 4DN: not on the flood risk listHP23 4DP: not on the flood risk listHP23 4DQ: not on the flood risk listHP23 4DR: not on the flood risk listHP23 4DS: not on the flood risk listHP23 4DT: not on the flood risk listHP23 4DU: not on the flood risk listHP23 4DW: not on the flood risk listHP23 4DX: not on the flood risk listHP23 4DY: not on the flood risk listHP23 4DZ: not on the flood risk listHP23 4EA: not on the flood risk listHP23 4ED: not on the flood risk listHP23 4EE: not on the flood risk listHP23 4EF: not on the flood risk listHP23 4EG: not on the flood risk listHP23 4EH: not on the flood risk listHP23 4EJ: not on the flood risk listHP23 4EL: not on the flood risk listHP23 4EN: not on the flood risk listHP23 4EP: not on the flood risk listHP23 4EQ: not on the flood risk listHP23 4ER: not on the flood risk listHP23 4ES: not on the flood risk listHP23 4ET: not on the flood risk listHP23 4EU: not on the flood risk listHP23 4EW: not on the flood risk listHP23 4EX: not on the flood risk listHP23 4EY: not on the flood risk listHP23 4EZ: not on the flood risk listHP23 4FD: not on the flood risk listHP23 4FE: not on the flood risk listHP23 4FF: not on the flood risk listHP23 4FG: not on the flood risk listHP23 4FL: not on the flood risk listHP23 4FN: not on the flood risk listHP23 4FP: not on the flood risk listHP23 4FQ: not on the flood risk listHP23 4FR: not on the flood risk listHP23 4FS: not on the flood risk listHP23 4FT: not on the flood risk listHP23 4FU: not on the flood risk listHP23 4FW: not on the flood risk listHP23 4FX: not on the flood risk listHP23 4FY: not on the flood risk listHP23 4FZ: not on the flood risk listHP23 4GA: not on the flood risk listHP23 4GB: not on the flood risk listHP23 4GD: not on the flood risk listHP23 4GE: not on the flood risk listHP23 4GF: not on the flood risk listHP23 4GX: not on the flood risk listHP23 4GY: not on the flood risk listHP23 4GZ: not on the flood risk listHP23 4HA: not on the flood risk listHP23 4HB: not on the flood risk listHP23 4HD: not on the flood risk listHP23 4HE: not on the flood risk listHP23 4HG: not on the flood risk listHP23 4HH: not on the flood risk listHP23 4HQ: not on the flood risk listHP23 4HR: not on the flood risk listHP23 4HS: not on the flood risk listHP23 4HT: not on the flood risk listHP23 4HU: not on the flood risk listHP23 4HX: not on the flood risk listHP23 4HY: not on the flood risk listHP23 4HZ: not on the flood risk listHP23 4JA: not on the flood risk listHP23 4JB: not on the flood risk listHP23 4JD: not on the flood risk listHP23 4JE: not on the flood risk listHP23 4JG: not on the flood risk listHP23 4JH: not on the flood risk listHP23 4JJ: not on the flood risk listHP23 4JL: not on the flood risk listHP23 4JN: not on the flood risk listHP23 4JT: not on the flood risk listHP23 4JU: not on the flood risk listHP23 4JX: not on the flood risk listHP23 4JY: not on the flood risk listHP23 4JZ: not on the flood risk listHP23 4LA: not on the flood risk listHP23 4LB: not on the flood risk listHP23 4LD: not on the flood risk listHP23 4LH: not on the flood risk listHP23 4LJ: not on the flood risk listHP23 4LL: not on the flood risk listHP23 4LN: not on the flood risk listHP23 4LP: not on the flood risk listHP23 4LR: not on the flood risk listHP23 4LS: not on the flood risk listHP23 4LT: not on the flood risk listHP23 4LU: not on the flood risk listHP23 4LW: not on the flood risk listHP23 4LX: not on the flood risk listHP23 4LY: not on the flood risk listHP23 4LZ: not on the flood risk listHP23 4NA: not on the flood risk listHP23 4NB: not on the flood risk listHP23 4ND: not on the flood risk listHP23 4NE: not on the flood risk listHP23 4NF: not on the flood risk listHP23 4NG: not on the flood risk listHP23 4NH: not on the flood risk listHP23 4NJ: not on the flood risk listHP23 4NP: not on the flood risk listHP23 4NQ: not on the flood risk listHP23 4NR: not on the flood risk listHP23 4NS: not on the flood risk listHP23 4NT: not on the flood risk listHP23 4NU: not on the flood risk listHP23 4NW: not on the flood risk listHP23 4NY: not on the flood risk listHP23 4NZ: not on the flood risk listHP23 4PB: not on the flood risk listHP23 4PD: not on the flood risk listHP23 4PF: not on the flood risk listHP23 4PG: not on the flood risk listHP23 4PH: not on the flood risk listHP23 4PN: not on the flood risk listHP23 4PP: not on the flood risk listHP23 4PQ: not on the flood risk listHP23 4PR: not on the flood risk listHP23 4PS: not on the flood risk listHP23 4PT: not on the flood risk listHP23 4PU: not on the flood risk listHP23 4PW: not on the flood risk listHP23 4PX: not on the flood risk listHP23 4PY: not on the flood risk listHP23 4PZ: not on the flood risk listHP23 4QB: not on the flood risk listHP23 4QE: not on the flood risk listHP23 4QJ: not on the flood risk listHP23 4QP: not on the flood risk listHP23 4QU: not on the flood risk listHP23 4QW: not on the flood risk listHP23 4QX: not on the flood risk listHP23 4QY: not on the flood risk listHP23 4RA: not on the flood risk listHP23 4RB: not on the flood risk listHP23 4RN: not on the flood risk listHP23 4RT: not on the flood risk listHP23 4SL: not on the flood risk listHP23 4ST: not on the flood risk listHP23 4TP: not on the flood risk listHP23 4PL: low flood risk at worstHP23 4QR: low flood risk at worstHP23 4FA: medium flood risk at worstHP23 4QG: medium flood risk at worstHP23 4BF: high flood riskHP23 4PJ: high flood riskHP23 4QD: high flood riskHP23 4QL: high flood riskHP23 4QQ: high flood riskHP23 4QS: high flood riskHP23 4QT: high flood riskHP23 4QZ: high flood riskHP23 4RL: high flood risk TringAston Clinton Map of every postcode in the HP23 4 sector, by flood risk Of the 202 postcodes in the HP23 4 sector that ONS places, 9 have a home or business at high risk, 2 are at medium risk at worst, 2 are at low risk at worst and 189 are not on the Environment Agency's at-risk list. Places named: Tring. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. Tring
  • A home or business at high risk: 9
  • At medium risk at worst: 2
  • At low risk at worst: 2
  • At very low risk only: 0
  • Not on the at-risk list: 189

Of the 202 postcodes in the HP23 4 sector that ONS places, 9 have a home or business at high risk, 2 are at medium risk at worst, 2 are at low risk at worst and 189 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.

HP23 4QZ6 at high riskHP23 4QS6 at high riskHP23 4QT5 at high riskHP23 4QQ4 at high riskHP23 4RL3 at high riskHP23 4QD2 at high riskHP23 4QL1 at high riskHP23 4BF1 at high riskHP23 4PJ1 at high risk

What do homes sell for in HP23 4?

Homes in HP23 4 sold for a typical £611,250 in the 12 months to August 2026, across 68 sales, up 3.6% on the 12 months before, HM Land Registry's figures show.

£611,250 typical price, the 12 months to August 2026
£590,000 12 months to August 2025
▲ up 3.6% on the 12 months before
  • Detached £760,000 22 sales
  • Semi-detached £611,250 26 sales
  • Terraced £446,500 17 sales
  • Flat or maisonette 3 sales, too few to price

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 HP23 4. 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 HP23 4

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.

HP23 4ABHP23 4AFHP23 4AGHP23 4AJHP23 4ALHP23 4ANHP23 4APHP23 4ARHP23 4ASHP23 4ATHP23 4AUHP23 4AWHP23 4AXHP23 4AYHP23 4AZHP23 4BAHP23 4BBHP23 4BEHP23 4BFHP23 4BHHP23 4BJHP23 4BNHP23 4BQHP23 4BSHP23 4BTHP23 4BUHP23 4BWHP23 4BXHP23 4BZHP23 4DAHP23 4DBHP23 4DDHP23 4DEHP23 4DFHP23 4DGHP23 4DHHP23 4DJHP23 4DNHP23 4DPHP23 4DQHP23 4DRHP23 4DSHP23 4DTHP23 4DUHP23 4DWHP23 4DXHP23 4DYHP23 4DZHP23 4EAHP23 4EDHP23 4EEHP23 4EFHP23 4EGHP23 4EHHP23 4EJHP23 4ELHP23 4ENHP23 4EPHP23 4EQHP23 4ERHP23 4ESHP23 4ETHP23 4EUHP23 4EWHP23 4EXHP23 4EYHP23 4EZHP23 4FAHP23 4FDHP23 4FEHP23 4FFHP23 4FGHP23 4FHHP23 4FLHP23 4FNHP23 4FPHP23 4FQHP23 4FRHP23 4FSHP23 4FTHP23 4FUHP23 4FWHP23 4FXHP23 4FYHP23 4FZHP23 4GAHP23 4GBHP23 4GDHP23 4GEHP23 4GFHP23 4GXHP23 4GYHP23 4GZHP23 4HAHP23 4HBHP23 4HDHP23 4HEHP23 4HFHP23 4HGHP23 4HHHP23 4HQHP23 4HRHP23 4HSHP23 4HTHP23 4HUHP23 4HXHP23 4HYHP23 4HZHP23 4JAHP23 4JBHP23 4JDHP23 4JEHP23 4JGHP23 4JHHP23 4JJHP23 4JLHP23 4JNHP23 4JPHP23 4JTHP23 4JUHP23 4JXHP23 4JYHP23 4JZHP23 4LAHP23 4LBHP23 4LDHP23 4LHHP23 4LJHP23 4LLHP23 4LNHP23 4LPHP23 4LRHP23 4LSHP23 4LTHP23 4LUHP23 4LWHP23 4LXHP23 4LYHP23 4LZHP23 4NAHP23 4NBHP23 4NDHP23 4NEHP23 4NFHP23 4NGHP23 4NHHP23 4NJHP23 4NPHP23 4NQHP23 4NRHP23 4NSHP23 4NTHP23 4NUHP23 4NWHP23 4NYHP23 4NZHP23 4PBHP23 4PDHP23 4PEHP23 4PFHP23 4PGHP23 4PHHP23 4PJHP23 4PLHP23 4PNHP23 4PPHP23 4PQHP23 4PRHP23 4PSHP23 4PTHP23 4PUHP23 4PWHP23 4PXHP23 4PYHP23 4PZHP23 4QBHP23 4QDHP23 4QEHP23 4QGHP23 4QJHP23 4QLHP23 4QPHP23 4QQHP23 4QRHP23 4QSHP23 4QTHP23 4QUHP23 4QWHP23 4QXHP23 4QYHP23 4QZHP23 4RAHP23 4RBHP23 4RJHP23 4RLHP23 4RNHP23 4RTHP23 4SLHP23 4STHP23 4TPHP23 4WBHP23 4ZZ

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.

Check a postcode

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