SN3 3 postcode sector in the SN3 district

SN3 3 is a sector of the SN3 district: every postcode that starts SN3 3. It has 227 postcodes in use, 6 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 SN3 3 sector, by flood risk

Map of every postcode in the SN3 3 sector, by flood risk Of the 227 postcodes in the SN3 3 sector that ONS places, 2 have a home or business at high risk and 225 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: Walcot, Covingham & Nythe. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A4312A4259A4313 SN3 3AA: not on the flood risk listSN3 3AB: not on the flood risk listSN3 3AD: not on the flood risk listSN3 3AE: not on the flood risk listSN3 3AF: not on the flood risk listSN3 3AG: not on the flood risk listSN3 3AH: not on the flood risk listSN3 3AJ: not on the flood risk listSN3 3AL: not on the flood risk listSN3 3AN: not on the flood risk listSN3 3AP: not on the flood risk listSN3 3AQ: not on the flood risk listSN3 3AR: not on the flood risk listSN3 3AS: not on the flood risk listSN3 3AT: not on the flood risk listSN3 3AU: not on the flood risk listSN3 3AW: not on the flood risk listSN3 3AX: not on the flood risk listSN3 3AY: not on the flood risk listSN3 3AZ: not on the flood risk listSN3 3BA: not on the flood risk listSN3 3BB: not on the flood risk listSN3 3BD: not on the flood risk listSN3 3BE: not on the flood risk listSN3 3BF: not on the flood risk listSN3 3BG: not on the flood risk listSN3 3BH: not on the flood risk listSN3 3BL: not on the flood risk listSN3 3BN: not on the flood risk listSN3 3BQ: not on the flood risk listSN3 3BS: not on the flood risk listSN3 3BT: not on the flood risk listSN3 3BU: not on the flood risk listSN3 3BW: not on the flood risk listSN3 3BX: not on the flood risk listSN3 3BY: not on the flood risk listSN3 3BZ: not on the flood risk listSN3 3DA: not on the flood risk listSN3 3DB: not on the flood risk listSN3 3DD: not on the flood risk listSN3 3DE: not on the flood risk listSN3 3DF: not on the flood risk listSN3 3DG: not on the flood risk listSN3 3DH: not on the flood risk listSN3 3DJ: not on the flood risk listSN3 3DL: not on the flood risk listSN3 3DN: not on the flood risk listSN3 3DP: not on the flood risk listSN3 3DQ: not on the flood risk listSN3 3DR: not on the flood risk listSN3 3DS: not on the flood risk listSN3 3DT: not on the flood risk listSN3 3DU: not on the flood risk listSN3 3DW: not on the flood risk listSN3 3DX: not on the flood risk listSN3 3DY: not on the flood risk listSN3 3DZ: not on the flood risk listSN3 3EA: not on the flood risk listSN3 3EB: not on the flood risk listSN3 3ED: not on the flood risk listSN3 3EE: not on the flood risk listSN3 3EF: not on the flood risk listSN3 3EG: not on the flood risk listSN3 3EH: not on the flood risk listSN3 3EJ: not on the flood risk listSN3 3EL: not on the flood risk listSN3 3EN: not on the flood risk listSN3 3EP: not on the flood risk listSN3 3EQ: not on the flood risk listSN3 3ER: not on the flood risk listSN3 3ES: not on the flood risk listSN3 3ET: not on the flood risk listSN3 3EU: not on the flood risk listSN3 3EW: not on the flood risk listSN3 3EX: not on the flood risk listSN3 3EY: not on the flood risk listSN3 3EZ: not on the flood risk listSN3 3FA: not on the flood risk listSN3 3FB: not on the flood risk listSN3 3FD: not on the flood risk listSN3 3FE: not on the flood risk listSN3 3FF: not on the flood risk listSN3 3FG: not on the flood risk listSN3 3FH: not on the flood risk listSN3 3FJ: not on the flood risk listSN3 3FL: not on the flood risk listSN3 3FN: not on the flood risk listSN3 3FP: not on the flood risk listSN3 3FQ: not on the flood risk listSN3 3FR: not on the flood risk listSN3 3FS: not on the flood risk listSN3 3FT: not on the flood risk listSN3 3FU: not on the flood risk listSN3 3FW: not on the flood risk listSN3 3FX: not on the flood risk listSN3 3FY: not on the flood risk listSN3 3FZ: not on the flood risk listSN3 3GA: not on the flood risk listSN3 3GB: not on the flood risk listSN3 3GD: not on the flood risk listSN3 3GE: not on the flood risk listSN3 3GF: not on the flood risk listSN3 3GG: not on the flood risk listSN3 3GH: not on the flood risk listSN3 3GJ: not on the flood risk listSN3 3GL: not on the flood risk listSN3 3GN: not on the flood risk listSN3 3GP: not on the flood risk listSN3 3GQ: not on the flood risk listSN3 3GR: not on the flood risk listSN3 3GS: not on the flood risk listSN3 3GT: not on the flood risk listSN3 3GU: not on the flood risk listSN3 3HA: not on the flood risk listSN3 3HB: not on the flood risk listSN3 3HD: not on the flood risk listSN3 3HE: not on the flood risk listSN3 3HF: not on the flood risk listSN3 3HG: not on the flood risk listSN3 3HH: not on the flood risk listSN3 3HJ: not on the flood risk listSN3 3HL: not on the flood risk listSN3 3HN: not on the flood risk listSN3 3HQ: not on the flood risk listSN3 3HT: not on the flood risk listSN3 3HX: not on the flood risk listSN3 3JB: not on the flood risk listSN3 3JD: not on the flood risk listSN3 3JE: not on the flood risk listSN3 3JF: not on the flood risk listSN3 3JJ: not on the flood risk listSN3 3JN: not on the flood risk listSN3 3JP: not on the flood risk listSN3 3JW: not on the flood risk listSN3 3LA: not on the flood risk listSN3 3LL: not on the flood risk listSN3 3LR: not on the flood risk listSN3 3LS: not on the flood risk listSN3 3LT: not on the flood risk listSN3 3LU: not on the flood risk listSN3 3LX: not on the flood risk listSN3 3LY: not on the flood risk listSN3 3LZ: not on the flood risk listSN3 3NA: not on the flood risk listSN3 3NB: not on the flood risk listSN3 3ND: not on the flood risk listSN3 3NE: not on the flood risk listSN3 3NF: not on the flood risk listSN3 3NG: not on the flood risk listSN3 3NH: not on the flood risk listSN3 3NJ: not on the flood risk listSN3 3NL: not on the flood risk listSN3 3NN: not on the flood risk listSN3 3NP: not on the flood risk listSN3 3NQ: not on the flood risk listSN3 3NR: not on the flood risk listSN3 3NS: not on the flood risk listSN3 3NT: not on the flood risk listSN3 3NU: not on the flood risk listSN3 3NW: not on the flood risk listSN3 3NX: not on the flood risk listSN3 3NY: not on the flood risk listSN3 3PA: not on the flood risk listSN3 3PB: not on the flood risk listSN3 3PD: not on the flood risk listSN3 3PE: not on the flood risk listSN3 3PF: not on the flood risk listSN3 3PG: not on the flood risk listSN3 3PH: not on the flood risk listSN3 3PJ: not on the flood risk listSN3 3PL: not on the flood risk listSN3 3PN: not on the flood risk listSN3 3PP: not on the flood risk listSN3 3PQ: not on the flood risk listSN3 3PR: not on the flood risk listSN3 3PS: not on the flood risk listSN3 3PT: not on the flood risk listSN3 3PU: not on the flood risk listSN3 3PW: not on the flood risk listSN3 3PX: not on the flood risk listSN3 3PY: not on the flood risk listSN3 3PZ: not on the flood risk listSN3 3QB: not on the flood risk listSN3 3RA: not on the flood risk listSN3 3RB: not on the flood risk listSN3 3RD: not on the flood risk listSN3 3RE: not on the flood risk listSN3 3RF: not on the flood risk listSN3 3RG: not on the flood risk listSN3 3RH: not on the flood risk listSN3 3RJ: not on the flood risk listSN3 3RL: not on the flood risk listSN3 3RN: not on the flood risk listSN3 3RP: not on the flood risk listSN3 3RQ: not on the flood risk listSN3 3RT: not on the flood risk listSN3 3RU: not on the flood risk listSN3 3RW: not on the flood risk listSN3 3RX: not on the flood risk listSN3 3RZ: not on the flood risk listSN3 3SA: not on the flood risk listSN3 3SB: not on the flood risk listSN3 3SD: not on the flood risk listSN3 3SE: not on the flood risk listSN3 3SU: not on the flood risk listSN3 3SX: not on the flood risk listSN3 3SY: not on the flood risk listSN3 3TA: not on the flood risk listSN3 3TB: not on the flood risk listSN3 3TD: not on the flood risk listSN3 3TE: not on the flood risk listSN3 3TF: not on the flood risk listSN3 3TG: not on the flood risk listSN3 3TH: not on the flood risk listSN3 3TJ: not on the flood risk listSN3 3TL: not on the flood risk listSN3 3TN: not on the flood risk listSN3 3TP: not on the flood risk listSN3 3TQ: not on the flood risk listSN3 3TR: not on the flood risk listSN3 3TY: not on the flood risk listSN3 3TZ: not on the flood risk listSN3 3UH: not on the flood risk listSN3 3SG: high flood riskSN3 3SQ: high flood risk WalcotCovingham & Nythe Map of every postcode in the SN3 3 sector, by flood risk Of the 227 postcodes in the SN3 3 sector that ONS places, 2 have a home or business at high risk and 225 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: Walcot, Covingham & Nythe. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A4259 WalcotCovingham & Nythe
  • A home or business at high risk: 2
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 225

Of the 227 postcodes in the SN3 3 sector that ONS places, 2 have a home or business at high risk and 225 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. Names in italics are council wards: we hold no town or village names here.

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.

SN3 3SG6 at high riskSN3 3SQ1 at high risk

Further out, not drawn

This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.

SN3 3LD

What do homes sell for in SN3 3?

Homes in SN3 3 sold for a typical £265,000 in the 12 months to August 2026, across 90 sales, down 3.6% on the 12 months before, HM Land Registry's figures show.

£265,000 typical price, the 12 months to August 2026
£275,000 12 months to August 2025
▼ down 3.6% on the 12 months before
  • Detached £320,000 7 sales
  • Semi-detached £292,000 27 sales
  • Terraced £261,000 48 sales
  • Flat or maisonette £121,000 8 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 SN3 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 SN3 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.

SN3 3AASN3 3ABSN3 3ADSN3 3AESN3 3AFSN3 3AGSN3 3AHSN3 3AJSN3 3ALSN3 3ANSN3 3APSN3 3AQSN3 3ARSN3 3ASSN3 3ATSN3 3AUSN3 3AWSN3 3AXSN3 3AYSN3 3AZSN3 3BASN3 3BBSN3 3BDSN3 3BESN3 3BFSN3 3BGSN3 3BHSN3 3BLSN3 3BNSN3 3BQSN3 3BSSN3 3BTSN3 3BUSN3 3BWSN3 3BXSN3 3BYSN3 3BZSN3 3DASN3 3DBSN3 3DDSN3 3DESN3 3DFSN3 3DGSN3 3DHSN3 3DJSN3 3DLSN3 3DNSN3 3DPSN3 3DQSN3 3DRSN3 3DSSN3 3DTSN3 3DUSN3 3DWSN3 3DXSN3 3DYSN3 3DZSN3 3EASN3 3EBSN3 3EDSN3 3EESN3 3EFSN3 3EGSN3 3EHSN3 3EJSN3 3ELSN3 3ENSN3 3EPSN3 3EQSN3 3ERSN3 3ESSN3 3ETSN3 3EUSN3 3EWSN3 3EXSN3 3EYSN3 3EZSN3 3FASN3 3FBSN3 3FDSN3 3FESN3 3FFSN3 3FGSN3 3FHSN3 3FJSN3 3FLSN3 3FNSN3 3FPSN3 3FQSN3 3FRSN3 3FSSN3 3FTSN3 3FUSN3 3FWSN3 3FXSN3 3FYSN3 3FZSN3 3GASN3 3GBSN3 3GDSN3 3GESN3 3GFSN3 3GGSN3 3GHSN3 3GJSN3 3GLSN3 3GNSN3 3GPSN3 3GQSN3 3GRSN3 3GSSN3 3GTSN3 3GUSN3 3HASN3 3HBSN3 3HDSN3 3HESN3 3HFSN3 3HGSN3 3HHSN3 3HJSN3 3HLSN3 3HNSN3 3HQSN3 3HTSN3 3HXSN3 3JBSN3 3JDSN3 3JESN3 3JFSN3 3JJSN3 3JNSN3 3JPSN3 3JWSN3 3LASN3 3LDSN3 3LHSN3 3LLSN3 3LRSN3 3LSSN3 3LTSN3 3LUSN3 3LXSN3 3LYSN3 3LZSN3 3NASN3 3NBSN3 3NDSN3 3NESN3 3NFSN3 3NGSN3 3NHSN3 3NJSN3 3NLSN3 3NNSN3 3NPSN3 3NQSN3 3NRSN3 3NSSN3 3NTSN3 3NUSN3 3NWSN3 3NXSN3 3NYSN3 3PASN3 3PBSN3 3PDSN3 3PESN3 3PFSN3 3PGSN3 3PHSN3 3PJSN3 3PLSN3 3PNSN3 3PPSN3 3PQSN3 3PRSN3 3PSSN3 3PTSN3 3PUSN3 3PWSN3 3PXSN3 3PYSN3 3PZSN3 3QBSN3 3RASN3 3RBSN3 3RDSN3 3RESN3 3RFSN3 3RGSN3 3RHSN3 3RJSN3 3RLSN3 3RNSN3 3RPSN3 3RQSN3 3RTSN3 3RUSN3 3RWSN3 3RXSN3 3RZSN3 3SASN3 3SBSN3 3SDSN3 3SESN3 3SGSN3 3SQSN3 3SUSN3 3SXSN3 3SYSN3 3TASN3 3TBSN3 3TDSN3 3TESN3 3TFSN3 3TGSN3 3THSN3 3TJSN3 3TLSN3 3TNSN3 3TPSN3 3TQSN3 3TRSN3 3TYSN3 3TZSN3 3UH

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.