DN21 3 postcode sector in the DN21 district

DN21 3 is a sector of the DN21 district: every postcode that starts DN21 3. It has 268 postcodes in use.

Not sure what a sector is? UK postcode format explained.

Every postcode in the DN21 3 sector, by flood risk

Map of every postcode in the DN21 3 sector, by flood risk Of the 268 postcodes in the DN21 3 sector that ONS places, 7 have a home or business at high risk, 15 are at medium risk at worst, 59 are at low risk at worst, 10 are at very low risk only and 177 are not on the Environment Agency's at-risk list. Places named: Gainsborough, Scotter. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A631 DN21 3AT: not on the flood risk listDN21 3BF: not on the flood risk listDN21 3BH: not on the flood risk listDN21 3EG: not on the flood risk listDN21 3EL: not on the flood risk listDN21 3FA: not on the flood risk listDN21 3FB: not on the flood risk listDN21 3FD: not on the flood risk listDN21 3FE: not on the flood risk listDN21 3FG: not on the flood risk listDN21 3FJ: not on the flood risk listDN21 3GA: not on the flood risk listDN21 3GF: not on the flood risk listDN21 3GR: not on the flood risk listDN21 3GT: not on the flood risk listDN21 3HA: not on the flood risk listDN21 3HB: not on the flood risk listDN21 3HD: not on the flood risk listDN21 3HE: not on the flood risk listDN21 3HG: not on the flood risk listDN21 3HH: not on the flood risk listDN21 3HJ: not on the flood risk listDN21 3HQ: not on the flood risk listDN21 3HR: not on the flood risk listDN21 3HS: not on the flood risk listDN21 3HT: not on the flood risk listDN21 3HU: not on the flood risk listDN21 3HX: not on the flood risk listDN21 3HY: not on the flood risk listDN21 3HZ: not on the flood risk listDN21 3JA: not on the flood risk listDN21 3JB: not on the flood risk listDN21 3JD: not on the flood risk listDN21 3JE: not on the flood risk listDN21 3JF: not on the flood risk listDN21 3JH: not on the flood risk listDN21 3JJ: not on the flood risk listDN21 3JL: not on the flood risk listDN21 3JQ: not on the flood risk listDN21 3JY: not on the flood risk listDN21 3JZ: not on the flood risk listDN21 3LB: not on the flood risk listDN21 3LD: not on the flood risk listDN21 3LF: not on the flood risk listDN21 3LG: not on the flood risk listDN21 3LH: not on the flood risk listDN21 3LP: not on the flood risk listDN21 3LQ: not on the flood risk listDN21 3LS: not on the flood risk listDN21 3LW: not on the flood risk listDN21 3LX: not on the flood risk listDN21 3LY: not on the flood risk listDN21 3LZ: not on the flood risk listDN21 3NA: not on the flood risk listDN21 3NB: not on the flood risk listDN21 3ND: not on the flood risk listDN21 3NF: not on the flood risk listDN21 3NG: not on the flood risk listDN21 3NH: not on the flood risk listDN21 3NJ: not on the flood risk listDN21 3NQ: not on the flood risk listDN21 3NR: not on the flood risk listDN21 3NS: not on the flood risk listDN21 3NT: not on the flood risk listDN21 3NW: not on the flood risk listDN21 3NX: not on the flood risk listDN21 3NY: not on the flood risk listDN21 3PA: not on the flood risk listDN21 3PB: not on the flood risk listDN21 3PD: not on the flood risk listDN21 3PE: not on the flood risk listDN21 3PF: not on the flood risk listDN21 3PG: not on the flood risk listDN21 3PJ: not on the flood risk listDN21 3PP: not on the flood risk listDN21 3PR: not on the flood risk listDN21 3PT: not on the flood risk listDN21 3PU: not on the flood risk listDN21 3PX: not on the flood risk listDN21 3PY: not on the flood risk listDN21 3PZ: not on the flood risk listDN21 3QB: not on the flood risk listDN21 3QG: not on the flood risk listDN21 3QH: not on the flood risk listDN21 3QL: not on the flood risk listDN21 3QP: not on the flood risk listDN21 3QR: not on the flood risk listDN21 3QS: not on the flood risk listDN21 3QX: not on the flood risk listDN21 3QZ: not on the flood risk listDN21 3RA: not on the flood risk listDN21 3RB: not on the flood risk listDN21 3RF: not on the flood risk listDN21 3RG: not on the flood risk listDN21 3RH: not on the flood risk listDN21 3RJ: not on the flood risk listDN21 3RL: not on the flood risk listDN21 3RN: not on the flood risk listDN21 3RP: not on the flood risk listDN21 3RS: not on the flood risk listDN21 3RT: not on the flood risk listDN21 3RU: not on the flood risk listDN21 3RW: not on the flood risk listDN21 3RX: not on the flood risk listDN21 3RY: not on the flood risk listDN21 3SA: not on the flood risk listDN21 3SB: not on the flood risk listDN21 3SE: not on the flood risk listDN21 3SF: not on the flood risk listDN21 3SG: not on the flood risk listDN21 3SL: not on the flood risk listDN21 3SN: not on the flood risk listDN21 3SP: not on the flood risk listDN21 3SR: not on the flood risk listDN21 3ST: not on the flood risk listDN21 3SU: not on the flood risk listDN21 3SX: not on the flood risk listDN21 3SZ: not on the flood risk listDN21 3TB: not on the flood risk listDN21 3TE: not on the flood risk listDN21 3TF: not on the flood risk listDN21 3TH: not on the flood risk listDN21 3TQ: not on the flood risk listDN21 3TR: not on the flood risk listDN21 3TT: not on the flood risk listDN21 3TU: not on the flood risk listDN21 3TY: not on the flood risk listDN21 3TZ: not on the flood risk listDN21 3UA: not on the flood risk listDN21 3UD: not on the flood risk listDN21 3UH: not on the flood risk listDN21 3UJ: not on the flood risk listDN21 3UL: not on the flood risk listDN21 3UN: not on the flood risk listDN21 3UP: not on the flood risk listDN21 3UT: not on the flood risk listDN21 3UW: not on the flood risk listDN21 3UX: not on the flood risk listDN21 3AB: very low flood risk onlyDN21 3AP: very low flood risk onlyDN21 3DH: very low flood risk onlyDN21 3DW: very low flood risk onlyDN21 3DX: very low flood risk onlyDN21 3EA: very low flood risk onlyDN21 3EE: very low flood risk onlyDN21 3HP: very low flood risk onlyDN21 3QD: very low flood risk onlyDN21 3AH: low flood risk at worstDN21 3AJ: low flood risk at worstDN21 3AQ: low flood risk at worstDN21 3AS: low flood risk at worstDN21 3AW: low flood risk at worstDN21 3BB: low flood risk at worstDN21 3BJ: low flood risk at worstDN21 3BL: low flood risk at worstDN21 3BN: low flood risk at worstDN21 3BP: low flood risk at worstDN21 3BS: low flood risk at worstDN21 3BU: low flood risk at worstDN21 3BW: low flood risk at worstDN21 3BZ: low flood risk at worstDN21 3DA: low flood risk at worstDN21 3DB: low flood risk at worstDN21 3DE: low flood risk at worstDN21 3DF: low flood risk at worstDN21 3DL: low flood risk at worstDN21 3DQ: low flood risk at worstDN21 3DT: low flood risk at worstDN21 3DU: low flood risk at worstDN21 3DY: low flood risk at worstDN21 3DZ: low flood risk at worstDN21 3EB: low flood risk at worstDN21 3ED: low flood risk at worstDN21 3EF: low flood risk at worstDN21 3EH: low flood risk at worstDN21 3EN: low flood risk at worstDN21 3EP: low flood risk at worstDN21 3EQ: low flood risk at worstDN21 3ER: low flood risk at worstDN21 3ES: low flood risk at worstDN21 3EW: low flood risk at worstDN21 3EX: low flood risk at worstDN21 3EY: low flood risk at worstDN21 3EZ: low flood risk at worstDN21 3GB: low flood risk at worstDN21 3GD: low flood risk at worstDN21 3GE: low flood risk at worstDN21 3LA: low flood risk at worstDN21 3LJ: low flood risk at worstDN21 3LN: low flood risk at worstDN21 3NP: low flood risk at worstDN21 3PS: low flood risk at worstDN21 3QE: low flood risk at worstDN21 3QF: low flood risk at worstDN21 3QT: low flood risk at worstDN21 3QU: low flood risk at worstDN21 3UE: low flood risk at worstDN21 3UG: low flood risk at worstDN21 3AA: medium flood risk at worstDN21 3AD: medium flood risk at worstDN21 3BD: medium flood risk at worstDN21 3BQ: medium flood risk at worstDN21 3BT: medium flood risk at worstDN21 3DD: medium flood risk at worstDN21 3DG: medium flood risk at worstDN21 3DP: medium flood risk at worstDN21 3DR: medium flood risk at worstDN21 3DS: medium flood risk at worstDN21 3ET: medium flood risk at worstDN21 3EU: medium flood risk at worstDN21 3JN: medium flood risk at worstDN21 3LL: medium flood risk at worstDN21 3NU: medium flood risk at worstDN21 3BY: high flood riskDN21 3DJ: high flood riskDN21 3FF: high flood riskDN21 3JX: high flood riskDN21 3LE: high flood riskDN21 3UQ: high flood riskDN21 3UR: high flood risk GainsboroughScotter Map of every postcode in the DN21 3 sector, by flood risk Of the 268 postcodes in the DN21 3 sector that ONS places, 7 have a home or business at high risk, 15 are at medium risk at worst, 59 are at low risk at worst, 10 are at very low risk only and 177 are not on the Environment Agency's at-risk list. Places named: Gainsborough, Scotter. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. GainsboroughScotter
  • A home or business at high risk: 7
  • At medium risk at worst: 15
  • At low risk at worst: 59
  • At very low risk only: 10
  • Not on the at-risk list: 177

Of the 268 postcodes in the DN21 3 sector that ONS places, 7 have a home or business at high risk, 15 are at medium risk at worst, 59 are at low risk at worst, 10 are at very low risk only and 177 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.

DN21 3UR4 at high riskDN21 3JX3 at high riskDN21 3FF3 at high riskDN21 3LE3 at high riskDN21 3BY1 at high riskDN21 3DJ1 at high riskDN21 3UQ1 at high risk

What do homes sell for in DN21 3?

Homes in DN21 3 sold for a typical £253,000 in the 12 months to August 2026, across 85 sales, up 2.8% on the 12 months before, HM Land Registry's figures show.

£253,000 typical price, the 12 months to August 2026
£246,000 12 months to August 2025
▲ up 2.8% on the 12 months before
  • Detached £305,000 56 sales
  • Semi-detached £215,000 19 sales
  • Terraced £138,000 9 sales
  • Flat or maisonette 1 sale, 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 DN21 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 DN21 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.

DN21 3AADN21 3ABDN21 3ADDN21 3AEDN21 3AGDN21 3AHDN21 3AJDN21 3ALDN21 3ANDN21 3APDN21 3AQDN21 3ARDN21 3ASDN21 3ATDN21 3AUDN21 3AWDN21 3AXDN21 3AYDN21 3AZDN21 3BADN21 3BBDN21 3BDDN21 3BFDN21 3BGDN21 3BHDN21 3BJDN21 3BLDN21 3BNDN21 3BPDN21 3BQDN21 3BSDN21 3BTDN21 3BUDN21 3BWDN21 3BXDN21 3BYDN21 3BZDN21 3DADN21 3DBDN21 3DDDN21 3DEDN21 3DFDN21 3DGDN21 3DHDN21 3DJDN21 3DLDN21 3DNDN21 3DPDN21 3DQDN21 3DRDN21 3DSDN21 3DTDN21 3DUDN21 3DWDN21 3DXDN21 3DYDN21 3DZDN21 3EADN21 3EBDN21 3EDDN21 3EEDN21 3EFDN21 3EGDN21 3EHDN21 3ELDN21 3ENDN21 3EPDN21 3EQDN21 3ERDN21 3ESDN21 3ETDN21 3EUDN21 3EWDN21 3EXDN21 3EYDN21 3EZDN21 3FADN21 3FBDN21 3FDDN21 3FEDN21 3FFDN21 3FGDN21 3FHDN21 3FJDN21 3GADN21 3GBDN21 3GDDN21 3GEDN21 3GFDN21 3GRDN21 3GTDN21 3HADN21 3HBDN21 3HDDN21 3HEDN21 3HGDN21 3HHDN21 3HJDN21 3HPDN21 3HQDN21 3HRDN21 3HSDN21 3HTDN21 3HUDN21 3HXDN21 3HYDN21 3HZDN21 3JADN21 3JBDN21 3JDDN21 3JEDN21 3JFDN21 3JHDN21 3JJDN21 3JLDN21 3JNDN21 3JQDN21 3JXDN21 3JYDN21 3JZDN21 3LADN21 3LBDN21 3LDDN21 3LEDN21 3LFDN21 3LGDN21 3LHDN21 3LJDN21 3LLDN21 3LNDN21 3LPDN21 3LQDN21 3LRDN21 3LSDN21 3LTDN21 3LWDN21 3LXDN21 3LYDN21 3LZDN21 3NADN21 3NBDN21 3NDDN21 3NEDN21 3NFDN21 3NGDN21 3NHDN21 3NJDN21 3NLDN21 3NNDN21 3NPDN21 3NQDN21 3NRDN21 3NSDN21 3NTDN21 3NUDN21 3NWDN21 3NXDN21 3NYDN21 3NZDN21 3PADN21 3PBDN21 3PDDN21 3PEDN21 3PFDN21 3PGDN21 3PHDN21 3PJDN21 3PPDN21 3PRDN21 3PSDN21 3PTDN21 3PUDN21 3PXDN21 3PYDN21 3PZDN21 3QBDN21 3QDDN21 3QEDN21 3QFDN21 3QGDN21 3QHDN21 3QLDN21 3QPDN21 3QRDN21 3QSDN21 3QTDN21 3QUDN21 3QXDN21 3QYDN21 3QZDN21 3RADN21 3RBDN21 3REDN21 3RFDN21 3RGDN21 3RHDN21 3RJDN21 3RLDN21 3RNDN21 3RPDN21 3RQDN21 3RRDN21 3RSDN21 3RTDN21 3RUDN21 3RWDN21 3RXDN21 3RYDN21 3RZDN21 3SADN21 3SBDN21 3SDDN21 3SEDN21 3SFDN21 3SGDN21 3SHDN21 3SJDN21 3SLDN21 3SNDN21 3SPDN21 3SQDN21 3SRDN21 3SSDN21 3STDN21 3SUDN21 3SWDN21 3SXDN21 3SYDN21 3SZDN21 3TADN21 3TBDN21 3TDDN21 3TEDN21 3TFDN21 3TGDN21 3THDN21 3TJDN21 3TLDN21 3TNDN21 3TPDN21 3TQDN21 3TRDN21 3TSDN21 3TTDN21 3TUDN21 3TWDN21 3TXDN21 3TYDN21 3TZDN21 3UADN21 3UBDN21 3UDDN21 3UEDN21 3UFDN21 3UGDN21 3UHDN21 3UJDN21 3ULDN21 3UNDN21 3UPDN21 3UQDN21 3URDN21 3UTDN21 3UUDN21 3UWDN21 3UXDN21 3UZDN21 3WA

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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