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, and which are new since 2020

Map of every postcode in the SN3 1 sector, by new since 2020 Of the 212 postcodes in the SN3 1 sector that ONS places, 8 are new since 2020 and 204 were in use before 2020. 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: before 2020SN3 1AB: before 2020SN3 1AD: before 2020SN3 1AE: before 2020SN3 1AF: before 2020SN3 1AG: before 2020SN3 1AH: before 2020SN3 1AL: before 2020SN3 1AN: before 2020SN3 1AQ: before 2020SN3 1AR: before 2020SN3 1AS: before 2020SN3 1AT: before 2020SN3 1AU: before 2020SN3 1AW: before 2020SN3 1AX: before 2020SN3 1AY: before 2020SN3 1AZ: before 2020SN3 1BA: before 2020SN3 1BF: before 2020SN3 1BG: before 2020SN3 1BH: before 2020SN3 1BJ: before 2020SN3 1BL: before 2020SN3 1BN: before 2020SN3 1BP: before 2020SN3 1BQ: before 2020SN3 1BS: before 2020SN3 1BT: before 2020SN3 1BU: before 2020SN3 1BW: before 2020SN3 1BX: before 2020SN3 1BY: before 2020SN3 1BZ: before 2020SN3 1DA: before 2020SN3 1DB: before 2020SN3 1DD: before 2020SN3 1DE: before 2020SN3 1DH: before 2020SN3 1DJ: before 2020SN3 1DL: before 2020SN3 1DN: before 2020SN3 1DP: before 2020SN3 1DQ: before 2020SN3 1DR: before 2020SN3 1DS: before 2020SN3 1DT: before 2020SN3 1DU: before 2020SN3 1DW: before 2020SN3 1DX: before 2020SN3 1DY: before 2020SN3 1DZ: before 2020SN3 1EA: before 2020SN3 1ED: before 2020SN3 1EE: before 2020SN3 1EF: before 2020SN3 1EG: before 2020SN3 1EH: before 2020SN3 1EJ: before 2020SN3 1EL: before 2020SN3 1EP: before 2020SN3 1EQ: before 2020SN3 1ER: before 2020SN3 1ES: before 2020SN3 1ET: before 2020SN3 1EU: before 2020SN3 1EW: before 2020SN3 1EX: before 2020SN3 1EY: before 2020SN3 1EZ: before 2020SN3 1FD: before 2020SN3 1FE: before 2020SN3 1FG: before 2020SN3 1FH: before 2020SN3 1FJ: before 2020SN3 1FL: before 2020SN3 1FN: before 2020SN3 1FP: before 2020SN3 1FQ: before 2020SN3 1FR: before 2020SN3 1FS: before 2020SN3 1FT: before 2020SN3 1FU: before 2020SN3 1HA: before 2020SN3 1HB: before 2020SN3 1HD: before 2020SN3 1HE: before 2020SN3 1HF: before 2020SN3 1HG: before 2020SN3 1HP: before 2020SN3 1HR: before 2020SN3 1HS: before 2020SN3 1HT: before 2020SN3 1HU: before 2020SN3 1HW: before 2020SN3 1HX: before 2020SN3 1HY: before 2020SN3 1HZ: before 2020SN3 1JA: before 2020SN3 1JB: before 2020SN3 1JD: before 2020SN3 1JE: before 2020SN3 1JF: before 2020SN3 1JG: before 2020SN3 1JL: before 2020SN3 1JP: before 2020SN3 1JQ: before 2020SN3 1JR: before 2020SN3 1JS: before 2020SN3 1JT: before 2020SN3 1JU: before 2020SN3 1JX: before 2020SN3 1JY: before 2020SN3 1JZ: before 2020SN3 1LA: before 2020SN3 1LB: before 2020SN3 1LD: before 2020SN3 1LE: before 2020SN3 1LF: before 2020SN3 1LG: before 2020SN3 1LH: before 2020SN3 1LJ: before 2020SN3 1LL: before 2020SN3 1LN: before 2020SN3 1LQ: before 2020SN3 1LU: before 2020SN3 1LW: before 2020SN3 1LX: before 2020SN3 1NA: before 2020SN3 1NB: before 2020SN3 1ND: before 2020SN3 1NE: before 2020SN3 1NF: before 2020SN3 1NG: before 2020SN3 1NH: before 2020SN3 1NJ: before 2020SN3 1NL: before 2020SN3 1NN: before 2020SN3 1NP: before 2020SN3 1NQ: before 2020SN3 1NR: before 2020SN3 1NS: before 2020SN3 1NT: before 2020SN3 1NU: before 2020SN3 1NW: before 2020SN3 1NX: before 2020SN3 1PA: before 2020SN3 1PB: before 2020SN3 1PD: before 2020SN3 1PG: before 2020SN3 1PH: before 2020SN3 1PJ: before 2020SN3 1PL: before 2020SN3 1PN: before 2020SN3 1PP: before 2020SN3 1PR: before 2020SN3 1PS: before 2020SN3 1PT: before 2020SN3 1PU: before 2020SN3 1PW: before 2020SN3 1PX: before 2020SN3 1PY: before 2020SN3 1PZ: before 2020SN3 1QA: before 2020SN3 1QB: before 2020SN3 1QD: before 2020SN3 1QE: before 2020SN3 1QF: before 2020SN3 1QG: before 2020SN3 1QJ: before 2020SN3 1QL: before 2020SN3 1QP: before 2020SN3 1QQ: before 2020SN3 1QR: before 2020SN3 1QT: before 2020SN3 1QU: before 2020SN3 1QW: before 2020SN3 1QX: before 2020SN3 1QY: before 2020SN3 1RA: before 2020SN3 1RG: before 2020SN3 1RN: before 2020SN3 1RP: before 2020SN3 1RR: before 2020SN3 1RS: before 2020SN3 1RT: before 2020SN3 1RU: before 2020SN3 1RX: before 2020SN3 1RY: before 2020SN3 1RZ: before 2020SN3 1SA: before 2020SN3 1SB: before 2020SN3 1SD: before 2020SN3 1SE: before 2020SN3 1SF: before 2020SN3 1SH: before 2020SN3 1BB: new since 2020SN3 1FB: new since 2020SN3 1FF: new since 2020SN3 1FW: new since 2020SN3 1FX: new since 2020SN3 1FY: new since 2020SN3 1GE: new since 2020SN3 1TS: new since 2020 Old Town & LawnWalcot Map of every postcode in the SN3 1 sector, by new since 2020 Of the 212 postcodes in the SN3 1 sector that ONS places, 8 are new since 2020 and 204 were in use before 2020. 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
  • New since 2020: 8
  • In use before 2020: 204

Of the 212 postcodes in the SN3 1 sector that ONS places, 8 are new since 2020 and 204 were in use before 2020.

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. New since 2020 means it came into use in January 2020 or later. 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; when each came into use: the same directory; 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 5 newest postcodes

SN3 1GEJuly 2026SN3 1TSJuly 2023SN3 1BBFebruary 2023SN3 1FXFebruary 2022SN3 1FYOctober 2021

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.

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