SN3 1 postcode sector in the SN3 district

SN3 1 is a sector of the SN3 district: every postcode that starts SN3 1. It has 212 postcodes in use, 9 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 1 sector, by flood risk

Map of every postcode in the SN3 1 sector, by flood risk Of the 212 postcodes in the SN3 1 sector that ONS places, 212 are not on the Environment Agency's at-risk list. Places named: Old Town & Lawn, Walcot. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. M4 SN3 1AA: not on the flood risk listSN3 1AB: not on the flood risk listSN3 1AD: not on the flood risk listSN3 1AE: not on the flood risk listSN3 1AF: not on the flood risk listSN3 1AG: not on the flood risk listSN3 1AH: not on the flood risk listSN3 1AL: not on the flood risk listSN3 1AN: not on the flood risk listSN3 1AQ: not on the flood risk listSN3 1AR: not on the flood risk listSN3 1AS: not on the flood risk listSN3 1AT: not on the flood risk listSN3 1AU: not on the flood risk listSN3 1AW: not on the flood risk listSN3 1AX: not on the flood risk listSN3 1AY: not on the flood risk listSN3 1AZ: not on the flood risk listSN3 1BA: not on the flood risk listSN3 1BB: not on the flood risk listSN3 1BF: not on the flood risk listSN3 1BG: not on the flood risk listSN3 1BH: not on the flood risk listSN3 1BJ: not on the flood risk listSN3 1BL: not on the flood risk listSN3 1BN: not on the flood risk listSN3 1BP: not on the flood risk listSN3 1BQ: not on the flood risk listSN3 1BS: not on the flood risk listSN3 1BT: not on the flood risk listSN3 1BU: not on the flood risk listSN3 1BW: not on the flood risk listSN3 1BX: not on the flood risk listSN3 1BY: not on the flood risk listSN3 1BZ: not on the flood risk listSN3 1DA: not on the flood risk listSN3 1DB: not on the flood risk listSN3 1DD: not on the flood risk listSN3 1DE: not on the flood risk listSN3 1DH: not on the flood risk listSN3 1DJ: not on the flood risk listSN3 1DL: not on the flood risk listSN3 1DN: not on the flood risk listSN3 1DP: not on the flood risk listSN3 1DQ: not on the flood risk listSN3 1DR: not on the flood risk listSN3 1DS: not on the flood risk listSN3 1DT: not on the flood risk listSN3 1DU: not on the flood risk listSN3 1DW: not on the flood risk listSN3 1DX: not on the flood risk listSN3 1DY: not on the flood risk listSN3 1DZ: not on the flood risk listSN3 1EA: not on the flood risk listSN3 1ED: not on the flood risk listSN3 1EE: not on the flood risk listSN3 1EF: not on the flood risk listSN3 1EG: not on the flood risk listSN3 1EH: not on the flood risk listSN3 1EJ: not on the flood risk listSN3 1EL: not on the flood risk listSN3 1EP: not on the flood risk listSN3 1EQ: not on the flood risk listSN3 1ER: not on the flood risk listSN3 1ES: not on the flood risk listSN3 1ET: not on the flood risk listSN3 1EU: not on the flood risk listSN3 1EW: not on the flood risk listSN3 1EX: not on the flood risk listSN3 1EY: not on the flood risk listSN3 1EZ: not on the flood risk listSN3 1FB: not on the flood risk listSN3 1FD: not on the flood risk listSN3 1FE: not on the flood risk listSN3 1FF: not on the flood risk listSN3 1FG: not on the flood risk listSN3 1FH: not on the flood risk listSN3 1FJ: not on the flood risk listSN3 1FL: not on the flood risk listSN3 1FN: not on the flood risk listSN3 1FP: not on the flood risk listSN3 1FQ: not on the flood risk listSN3 1FR: not on the flood risk listSN3 1FS: not on the flood risk listSN3 1FT: not on the flood risk listSN3 1FU: not on the flood risk listSN3 1FW: not on the flood risk listSN3 1FX: not on the flood risk listSN3 1FY: not on the flood risk listSN3 1GE: not on the flood risk listSN3 1HA: not on the flood risk listSN3 1HB: not on the flood risk listSN3 1HD: not on the flood risk listSN3 1HE: not on the flood risk listSN3 1HF: not on the flood risk listSN3 1HG: not on the flood risk listSN3 1HP: not on the flood risk listSN3 1HR: not on the flood risk listSN3 1HS: not on the flood risk listSN3 1HT: not on the flood risk listSN3 1HU: not on the flood risk listSN3 1HW: not on the flood risk listSN3 1HX: not on the flood risk listSN3 1HY: not on the flood risk listSN3 1HZ: not on the flood risk listSN3 1JA: not on the flood risk listSN3 1JB: not on the flood risk listSN3 1JD: not on the flood risk listSN3 1JE: not on the flood risk listSN3 1JF: not on the flood risk listSN3 1JG: not on the flood risk listSN3 1JJ: not on the flood risk listSN3 1JL: not on the flood risk listSN3 1JP: not on the flood risk listSN3 1JQ: not on the flood risk listSN3 1JR: not on the flood risk listSN3 1JS: not on the flood risk listSN3 1JT: not on the flood risk listSN3 1JU: not on the flood risk listSN3 1JX: not on the flood risk listSN3 1JY: not on the flood risk listSN3 1JZ: not on the flood risk listSN3 1LA: not on the flood risk listSN3 1LB: not on the flood risk listSN3 1LD: not on the flood risk listSN3 1LE: not on the flood risk listSN3 1LF: not on the flood risk listSN3 1LG: not on the flood risk listSN3 1LH: not on the flood risk listSN3 1LJ: not on the flood risk listSN3 1LL: not on the flood risk listSN3 1LN: not on the flood risk listSN3 1LQ: not on the flood risk listSN3 1LU: not on the flood risk listSN3 1LW: not on the flood risk listSN3 1LX: not on the flood risk listSN3 1NA: not on the flood risk listSN3 1NB: not on the flood risk listSN3 1ND: not on the flood risk listSN3 1NE: not on the flood risk listSN3 1NF: not on the flood risk listSN3 1NG: not on the flood risk listSN3 1NH: not on the flood risk listSN3 1NJ: not on the flood risk listSN3 1NL: not on the flood risk listSN3 1NN: not on the flood risk listSN3 1NP: not on the flood risk listSN3 1NQ: not on the flood risk listSN3 1NR: not on the flood risk listSN3 1NS: not on the flood risk listSN3 1NT: not on the flood risk listSN3 1NU: not on the flood risk listSN3 1NW: not on the flood risk listSN3 1NX: not on the flood risk listSN3 1PA: not on the flood risk listSN3 1PB: not on the flood risk listSN3 1PD: not on the flood risk listSN3 1PG: not on the flood risk listSN3 1PH: not on the flood risk listSN3 1PJ: not on the flood risk listSN3 1PL: not on the flood risk listSN3 1PN: not on the flood risk listSN3 1PP: not on the flood risk listSN3 1PR: not on the flood risk listSN3 1PS: not on the flood risk listSN3 1PT: not on the flood risk listSN3 1PU: not on the flood risk listSN3 1PW: not on the flood risk listSN3 1PX: not on the flood risk listSN3 1PY: not on the flood risk listSN3 1PZ: not on the flood risk listSN3 1QA: not on the flood risk listSN3 1QB: not on the flood risk listSN3 1QD: not on the flood risk listSN3 1QE: not on the flood risk listSN3 1QF: not on the flood risk listSN3 1QG: not on the flood risk listSN3 1QJ: not on the flood risk listSN3 1QL: not on the flood risk listSN3 1QP: not on the flood risk listSN3 1QQ: not on the flood risk listSN3 1QR: not on the flood risk listSN3 1QT: not on the flood risk listSN3 1QU: not on the flood risk listSN3 1QW: not on the flood risk listSN3 1QX: not on the flood risk listSN3 1QY: not on the flood risk listSN3 1RA: not on the flood risk listSN3 1RG: not on the flood risk listSN3 1RN: not on the flood risk listSN3 1RP: not on the flood risk listSN3 1RR: not on the flood risk listSN3 1RS: not on the flood risk listSN3 1RT: not on the flood risk listSN3 1RU: not on the flood risk listSN3 1RX: not on the flood risk listSN3 1RY: not on the flood risk listSN3 1RZ: not on the flood risk listSN3 1SA: not on the flood risk listSN3 1SB: not on the flood risk listSN3 1SD: not on the flood risk listSN3 1SE: not on the flood risk listSN3 1SF: not on the flood risk listSN3 1SH: not on the flood risk list Old Town & LawnWalcot Map of every postcode in the SN3 1 sector, by flood risk Of the 212 postcodes in the SN3 1 sector that ONS places, 212 are not on the Environment Agency's at-risk list. Places named: Old Town & Lawn, Walcot. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. M4 Old Town & LawnWalcot
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 212

Of the 212 postcodes in the SN3 1 sector that ONS places, 212 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

What do homes sell for in SN3 1?

Homes in SN3 1 sold for a typical £340,000 in the 12 months to August 2026, across 137 sales, down 2% on the 12 months before, HM Land Registry's figures show.

£340,000 typical price, the 12 months to August 2026
£347,000 12 months to August 2025
▼ down 2% on the 12 months before
  • Detached £473,750 26 sales
  • Semi-detached £355,000 61 sales
  • Terraced £270,000 27 sales
  • Flat or maisonette £149,000 23 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 1. 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 1

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 1AASN3 1ABSN3 1ADSN3 1AESN3 1AFSN3 1AGSN3 1AHSN3 1ALSN3 1ANSN3 1AQSN3 1ARSN3 1ASSN3 1ATSN3 1AUSN3 1AWSN3 1AXSN3 1AYSN3 1AZSN3 1BASN3 1BBSN3 1BFSN3 1BGSN3 1BHSN3 1BJSN3 1BLSN3 1BNSN3 1BPSN3 1BQSN3 1BSSN3 1BTSN3 1BUSN3 1BWSN3 1BXSN3 1BYSN3 1BZSN3 1DASN3 1DBSN3 1DDSN3 1DESN3 1DHSN3 1DJSN3 1DLSN3 1DNSN3 1DPSN3 1DQSN3 1DRSN3 1DSSN3 1DTSN3 1DUSN3 1DWSN3 1DXSN3 1DYSN3 1DZSN3 1EASN3 1EBSN3 1EDSN3 1EESN3 1EFSN3 1EGSN3 1EHSN3 1EJSN3 1ELSN3 1EPSN3 1EQSN3 1ERSN3 1ESSN3 1ETSN3 1EUSN3 1EWSN3 1EXSN3 1EYSN3 1EZSN3 1FBSN3 1FDSN3 1FESN3 1FFSN3 1FGSN3 1FHSN3 1FJSN3 1FLSN3 1FNSN3 1FPSN3 1FQSN3 1FRSN3 1FSSN3 1FTSN3 1FUSN3 1FWSN3 1FXSN3 1FYSN3 1GESN3 1HASN3 1HBSN3 1HDSN3 1HESN3 1HFSN3 1HGSN3 1HPSN3 1HRSN3 1HSSN3 1HTSN3 1HUSN3 1HWSN3 1HXSN3 1HYSN3 1HZSN3 1JASN3 1JBSN3 1JDSN3 1JESN3 1JFSN3 1JGSN3 1JJSN3 1JLSN3 1JPSN3 1JQSN3 1JRSN3 1JSSN3 1JTSN3 1JUSN3 1JXSN3 1JYSN3 1JZSN3 1LASN3 1LBSN3 1LDSN3 1LESN3 1LFSN3 1LGSN3 1LHSN3 1LJSN3 1LLSN3 1LNSN3 1LQSN3 1LUSN3 1LWSN3 1LXSN3 1NASN3 1NBSN3 1NDSN3 1NESN3 1NFSN3 1NGSN3 1NHSN3 1NJSN3 1NLSN3 1NNSN3 1NPSN3 1NQSN3 1NRSN3 1NSSN3 1NTSN3 1NUSN3 1NWSN3 1NXSN3 1PASN3 1PBSN3 1PDSN3 1PGSN3 1PHSN3 1PJSN3 1PLSN3 1PNSN3 1PPSN3 1PRSN3 1PSSN3 1PTSN3 1PUSN3 1PWSN3 1PXSN3 1PYSN3 1PZSN3 1QASN3 1QBSN3 1QDSN3 1QESN3 1QFSN3 1QGSN3 1QJSN3 1QLSN3 1QPSN3 1QQSN3 1QRSN3 1QTSN3 1QUSN3 1QWSN3 1QXSN3 1QYSN3 1RASN3 1RGSN3 1RLSN3 1RNSN3 1RPSN3 1RRSN3 1RSSN3 1RTSN3 1RUSN3 1RXSN3 1RYSN3 1RZSN3 1SASN3 1SBSN3 1SDSN3 1SESN3 1SFSN3 1SHSN3 1TASN3 1THSN3 1TSSN3 1TXSN3 1TYSN3 1UJ

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.