IP21 4 postcode sector in the IP21 district

IP21 4 is a sector of the IP21 district: every postcode that starts IP21 4. It has 276 postcodes in use, 3 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 IP21 4 sector, by flood risk

Map of every postcode in the IP21 4 sector, by flood risk Of the 276 postcodes in the IP21 4 sector that ONS places, 11 have a home or business at high risk, 3 are at medium risk at worst, 6 are at low risk at worst and 256 are not on the Environment Agency's at-risk list. Places named: Diss. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A140A1066 IP21 4AA: not on the flood risk listIP21 4AB: not on the flood risk listIP21 4AD: not on the flood risk listIP21 4AE: not on the flood risk listIP21 4AF: not on the flood risk listIP21 4AG: not on the flood risk listIP21 4AH: not on the flood risk listIP21 4AL: not on the flood risk listIP21 4AN: not on the flood risk listIP21 4AP: not on the flood risk listIP21 4AR: not on the flood risk listIP21 4AS: not on the flood risk listIP21 4AT: not on the flood risk listIP21 4AU: not on the flood risk listIP21 4AW: not on the flood risk listIP21 4AX: not on the flood risk listIP21 4AY: not on the flood risk listIP21 4AZ: not on the flood risk listIP21 4BB: not on the flood risk listIP21 4BD: not on the flood risk listIP21 4BE: not on the flood risk listIP21 4BH: not on the flood risk listIP21 4BJ: not on the flood risk listIP21 4BL: not on the flood risk listIP21 4BN: not on the flood risk listIP21 4BP: not on the flood risk listIP21 4BQ: not on the flood risk listIP21 4BS: not on the flood risk listIP21 4BT: not on the flood risk listIP21 4BU: not on the flood risk listIP21 4BW: not on the flood risk listIP21 4BX: not on the flood risk listIP21 4BY: not on the flood risk listIP21 4BZ: not on the flood risk listIP21 4DB: not on the flood risk listIP21 4DD: not on the flood risk listIP21 4DF: not on the flood risk listIP21 4DQ: not on the flood risk listIP21 4DR: not on the flood risk listIP21 4DS: not on the flood risk listIP21 4DT: not on the flood risk listIP21 4DU: not on the flood risk listIP21 4DW: not on the flood risk listIP21 4DX: not on the flood risk listIP21 4DY: not on the flood risk listIP21 4DZ: not on the flood risk listIP21 4EA: not on the flood risk listIP21 4EB: not on the flood risk listIP21 4ED: not on the flood risk listIP21 4EE: not on the flood risk listIP21 4EF: not on the flood risk listIP21 4EG: not on the flood risk listIP21 4EJ: not on the flood risk listIP21 4EL: not on the flood risk listIP21 4EN: not on the flood risk listIP21 4EP: not on the flood risk listIP21 4EQ: not on the flood risk listIP21 4ER: not on the flood risk listIP21 4ES: not on the flood risk listIP21 4ET: not on the flood risk listIP21 4EW: not on the flood risk listIP21 4EY: not on the flood risk listIP21 4EZ: not on the flood risk listIP21 4FA: not on the flood risk listIP21 4FB: not on the flood risk listIP21 4FD: not on the flood risk listIP21 4FE: not on the flood risk listIP21 4FF: not on the flood risk listIP21 4FG: not on the flood risk listIP21 4FH: not on the flood risk listIP21 4FZ: not on the flood risk listIP21 4GA: not on the flood risk listIP21 4GN: not on the flood risk listIP21 4HB: not on the flood risk listIP21 4HD: not on the flood risk listIP21 4HG: not on the flood risk listIP21 4HH: not on the flood risk listIP21 4HJ: not on the flood risk listIP21 4HL: not on the flood risk listIP21 4HN: not on the flood risk listIP21 4HP: not on the flood risk listIP21 4HR: not on the flood risk listIP21 4HS: not on the flood risk listIP21 4HT: not on the flood risk listIP21 4HU: not on the flood risk listIP21 4HW: not on the flood risk listIP21 4HX: not on the flood risk listIP21 4HY: not on the flood risk listIP21 4HZ: not on the flood risk listIP21 4JA: not on the flood risk listIP21 4JB: not on the flood risk listIP21 4JD: not on the flood risk listIP21 4JE: not on the flood risk listIP21 4JG: not on the flood risk listIP21 4JH: not on the flood risk listIP21 4JR: not on the flood risk listIP21 4JS: not on the flood risk listIP21 4JT: not on the flood risk listIP21 4JU: not on the flood risk listIP21 4JX: not on the flood risk listIP21 4LB: not on the flood risk listIP21 4LD: not on the flood risk listIP21 4LL: not on the flood risk listIP21 4LN: not on the flood risk listIP21 4LP: not on the flood risk listIP21 4LQ: not on the flood risk listIP21 4LR: not on the flood risk listIP21 4LS: not on the flood risk listIP21 4LT: not on the flood risk listIP21 4LU: not on the flood risk listIP21 4LW: not on the flood risk listIP21 4LX: not on the flood risk listIP21 4LY: not on the flood risk listIP21 4LZ: not on the flood risk listIP21 4NA: not on the flood risk listIP21 4NB: not on the flood risk listIP21 4ND: not on the flood risk listIP21 4NE: not on the flood risk listIP21 4NG: not on the flood risk listIP21 4NH: not on the flood risk listIP21 4NJ: not on the flood risk listIP21 4NL: not on the flood risk listIP21 4NN: not on the flood risk listIP21 4NP: not on the flood risk listIP21 4NQ: not on the flood risk listIP21 4NS: not on the flood risk listIP21 4NT: not on the flood risk listIP21 4NU: not on the flood risk listIP21 4NW: not on the flood risk listIP21 4NX: not on the flood risk listIP21 4NY: not on the flood risk listIP21 4NZ: not on the flood risk listIP21 4PB: not on the flood risk listIP21 4PD: not on the flood risk listIP21 4PE: not on the flood risk listIP21 4PF: not on the flood risk listIP21 4PG: not on the flood risk listIP21 4PH: not on the flood risk listIP21 4PJ: not on the flood risk listIP21 4PL: not on the flood risk listIP21 4PP: not on the flood risk listIP21 4PQ: not on the flood risk listIP21 4PR: not on the flood risk listIP21 4PS: not on the flood risk listIP21 4PT: not on the flood risk listIP21 4PX: not on the flood risk listIP21 4PY: not on the flood risk listIP21 4QA: not on the flood risk listIP21 4QB: not on the flood risk listIP21 4QD: not on the flood risk listIP21 4QE: not on the flood risk listIP21 4QF: not on the flood risk listIP21 4QG: not on the flood risk listIP21 4QH: not on the flood risk listIP21 4QJ: not on the flood risk listIP21 4QL: not on the flood risk listIP21 4QN: not on the flood risk listIP21 4QP: not on the flood risk listIP21 4QQ: not on the flood risk listIP21 4QR: not on the flood risk listIP21 4QU: not on the flood risk listIP21 4QW: not on the flood risk listIP21 4QX: not on the flood risk listIP21 4QY: not on the flood risk listIP21 4QZ: not on the flood risk listIP21 4RB: not on the flood risk listIP21 4RD: not on the flood risk listIP21 4RF: not on the flood risk listIP21 4RG: not on the flood risk listIP21 4RH: not on the flood risk listIP21 4RJ: not on the flood risk listIP21 4RL: not on the flood risk listIP21 4RN: not on the flood risk listIP21 4RP: not on the flood risk listIP21 4RQ: not on the flood risk listIP21 4RR: not on the flood risk listIP21 4RT: not on the flood risk listIP21 4RU: not on the flood risk listIP21 4RW: not on the flood risk listIP21 4RX: not on the flood risk listIP21 4SH: not on the flood risk listIP21 4SL: not on the flood risk listIP21 4SN: not on the flood risk listIP21 4SP: not on the flood risk listIP21 4SS: not on the flood risk listIP21 4SW: not on the flood risk listIP21 4SX: not on the flood risk listIP21 4SY: not on the flood risk listIP21 4SZ: not on the flood risk listIP21 4TA: not on the flood risk listIP21 4TB: not on the flood risk listIP21 4TD: not on the flood risk listIP21 4TE: not on the flood risk listIP21 4TF: not on the flood risk listIP21 4TH: not on the flood risk listIP21 4TJ: not on the flood risk listIP21 4TL: not on the flood risk listIP21 4TN: not on the flood risk listIP21 4TP: not on the flood risk listIP21 4TQ: not on the flood risk listIP21 4TR: not on the flood risk listIP21 4TS: not on the flood risk listIP21 4UA: not on the flood risk listIP21 4UB: not on the flood risk listIP21 4UD: not on the flood risk listIP21 4UE: not on the flood risk listIP21 4UF: not on the flood risk listIP21 4WZ: not on the flood risk listIP21 4XA: not on the flood risk listIP21 4XB: not on the flood risk listIP21 4XD: not on the flood risk listIP21 4XE: not on the flood risk listIP21 4XF: not on the flood risk listIP21 4XG: not on the flood risk listIP21 4XH: not on the flood risk listIP21 4XJ: not on the flood risk listIP21 4XL: not on the flood risk listIP21 4XN: not on the flood risk listIP21 4XP: not on the flood risk listIP21 4XQ: not on the flood risk listIP21 4XS: not on the flood risk listIP21 4XT: not on the flood risk listIP21 4XU: not on the flood risk listIP21 4XW: not on the flood risk listIP21 4XX: not on the flood risk listIP21 4XY: not on the flood risk listIP21 4XZ: not on the flood risk listIP21 4YA: not on the flood risk listIP21 4YB: not on the flood risk listIP21 4YD: not on the flood risk listIP21 4YF: not on the flood risk listIP21 4YG: not on the flood risk listIP21 4YH: not on the flood risk listIP21 4YJ: not on the flood risk listIP21 4YL: not on the flood risk listIP21 4AJ: low flood risk at worstIP21 4BF: low flood risk at worstIP21 4DL: low flood risk at worstIP21 4DP: low flood risk at worstIP21 4JY: low flood risk at worstIP21 4UH: low flood risk at worstIP21 4NR: medium flood risk at worstIP21 4UJ: medium flood risk at worstIP21 4XR: medium flood risk at worstIP21 4DH: high flood riskIP21 4DJ: high flood riskIP21 4JL: high flood riskIP21 4JP: high flood riskIP21 4JW: high flood riskIP21 4LA: high flood riskIP21 4QS: high flood riskIP21 4QT: high flood riskIP21 4RZ: high flood riskIP21 4UL: high flood riskIP21 4UU: high flood risk Diss Map of every postcode in the IP21 4 sector, by flood risk Of the 276 postcodes in the IP21 4 sector that ONS places, 11 have a home or business at high risk, 3 are at medium risk at worst, 6 are at low risk at worst and 256 are not on the Environment Agency's at-risk list. Places named: Diss. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. Diss
  • A home or business at high risk: 11
  • At medium risk at worst: 3
  • At low risk at worst: 6
  • At very low risk only: 0
  • Not on the at-risk list: 256

Of the 276 postcodes in the IP21 4 sector that ONS places, 11 have a home or business at high risk, 3 are at medium risk at worst, 6 are at low risk at worst and 256 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.

IP21 4JP11 at high riskIP21 4JW9 at high riskIP21 4LA5 at high riskIP21 4UL5 at high riskIP21 4JL3 at high riskIP21 4DJ2 at high riskIP21 4UU2 at high riskIP21 4DH1 at high riskIP21 4QS1 at high riskIP21 4QT1 at high riskIP21 4RZ1 at high risk

What do homes sell for in IP21 4?

Homes in IP21 4 sold for a typical £295,000 in the 12 months to August 2026, across 77 sales, no change on the 12 months before, HM Land Registry's figures show.

£295,000 typical price, the 12 months to August 2026
£295,000 12 months to August 2025
■ no change on the 12 months before
  • Detached £407,500 42 sales
  • Semi-detached £260,000 26 sales
  • Terraced £242,500 7 sales
  • Flat or maisonette 2 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 IP21 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 IP21 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.

IP21 4AAIP21 4ABIP21 4ADIP21 4AEIP21 4AFIP21 4AGIP21 4AHIP21 4AJIP21 4ALIP21 4ANIP21 4APIP21 4AQIP21 4ARIP21 4ASIP21 4ATIP21 4AUIP21 4AWIP21 4AXIP21 4AYIP21 4AZIP21 4BBIP21 4BDIP21 4BEIP21 4BFIP21 4BHIP21 4BJIP21 4BLIP21 4BNIP21 4BPIP21 4BQIP21 4BSIP21 4BTIP21 4BUIP21 4BWIP21 4BXIP21 4BYIP21 4BZIP21 4DBIP21 4DDIP21 4DFIP21 4DGIP21 4DHIP21 4DJIP21 4DLIP21 4DNIP21 4DPIP21 4DQIP21 4DRIP21 4DSIP21 4DTIP21 4DUIP21 4DWIP21 4DXIP21 4DYIP21 4DZIP21 4EAIP21 4EBIP21 4EDIP21 4EEIP21 4EFIP21 4EGIP21 4EHIP21 4EJIP21 4ELIP21 4ENIP21 4EPIP21 4EQIP21 4ERIP21 4ESIP21 4ETIP21 4EWIP21 4EXIP21 4EYIP21 4EZIP21 4FAIP21 4FBIP21 4FDIP21 4FEIP21 4FFIP21 4FGIP21 4FHIP21 4FZIP21 4GAIP21 4GNIP21 4HBIP21 4HDIP21 4HEIP21 4HGIP21 4HHIP21 4HJIP21 4HLIP21 4HNIP21 4HPIP21 4HRIP21 4HSIP21 4HTIP21 4HUIP21 4HWIP21 4HXIP21 4HYIP21 4HZIP21 4JAIP21 4JBIP21 4JDIP21 4JEIP21 4JGIP21 4JHIP21 4JJIP21 4JLIP21 4JPIP21 4JRIP21 4JSIP21 4JTIP21 4JUIP21 4JWIP21 4JXIP21 4JYIP21 4JZIP21 4LAIP21 4LBIP21 4LDIP21 4LHIP21 4LLIP21 4LNIP21 4LPIP21 4LQIP21 4LRIP21 4LSIP21 4LTIP21 4LUIP21 4LWIP21 4LXIP21 4LYIP21 4LZIP21 4NAIP21 4NBIP21 4NDIP21 4NEIP21 4NGIP21 4NHIP21 4NJIP21 4NLIP21 4NNIP21 4NPIP21 4NQIP21 4NRIP21 4NSIP21 4NTIP21 4NUIP21 4NWIP21 4NXIP21 4NYIP21 4NZIP21 4PAIP21 4PBIP21 4PDIP21 4PEIP21 4PFIP21 4PGIP21 4PHIP21 4PJIP21 4PLIP21 4PPIP21 4PQIP21 4PRIP21 4PSIP21 4PTIP21 4PWIP21 4PXIP21 4PYIP21 4QAIP21 4QBIP21 4QDIP21 4QEIP21 4QFIP21 4QGIP21 4QHIP21 4QJIP21 4QLIP21 4QNIP21 4QPIP21 4QQIP21 4QRIP21 4QSIP21 4QTIP21 4QUIP21 4QWIP21 4QXIP21 4QYIP21 4QZIP21 4RAIP21 4RBIP21 4RDIP21 4REIP21 4RFIP21 4RGIP21 4RHIP21 4RJIP21 4RLIP21 4RNIP21 4RPIP21 4RQIP21 4RRIP21 4RTIP21 4RUIP21 4RWIP21 4RXIP21 4RZIP21 4SHIP21 4SJIP21 4SLIP21 4SNIP21 4SPIP21 4SQIP21 4SRIP21 4SSIP21 4SUIP21 4SWIP21 4SXIP21 4SYIP21 4SZIP21 4TAIP21 4TBIP21 4TDIP21 4TEIP21 4TFIP21 4TGIP21 4THIP21 4TJIP21 4TLIP21 4TNIP21 4TPIP21 4TQIP21 4TRIP21 4TSIP21 4TXIP21 4UAIP21 4UBIP21 4UDIP21 4UEIP21 4UFIP21 4UHIP21 4UJIP21 4ULIP21 4UUIP21 4WQIP21 4WZIP21 4XAIP21 4XBIP21 4XDIP21 4XEIP21 4XFIP21 4XGIP21 4XHIP21 4XJIP21 4XLIP21 4XNIP21 4XPIP21 4XQIP21 4XRIP21 4XSIP21 4XTIP21 4XUIP21 4XWIP21 4XXIP21 4XYIP21 4XZIP21 4YAIP21 4YBIP21 4YDIP21 4YEIP21 4YFIP21 4YGIP21 4YHIP21 4YJIP21 4YL

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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