SA31 3 postcode sector in the SA31 district

SA31 3 is a sector of the SA31 district: every postcode that starts SA31 3. It has 203 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 SA31 3 sector, and which are new since 2020

Map of every postcode in the SA31 3 sector, by new since 2020 Of the 203 postcodes in the SA31 3 sector that ONS places, 8 are new since 2020 and 195 were in use before 2020. 2 postcodes lie beyond the edge and are listed under the map. Places named: Carmarthen. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A48 SA31 3AB: before 2020SA31 3AD: before 2020SA31 3AE: before 2020SA31 3AF: before 2020SA31 3AJ: before 2020SA31 3AL: before 2020SA31 3AN: before 2020SA31 3AP: before 2020SA31 3AR: before 2020SA31 3AS: before 2020SA31 3AX: before 2020SA31 3AY: before 2020SA31 3AZ: before 2020SA31 3BA: before 2020SA31 3BB: before 2020SA31 3BD: before 2020SA31 3BE: before 2020SA31 3BG: before 2020SA31 3BH: before 2020SA31 3BJ: before 2020SA31 3BL: before 2020SA31 3BN: before 2020SA31 3BP: before 2020SA31 3BR: before 2020SA31 3BS: before 2020SA31 3BT: before 2020SA31 3BU: before 2020SA31 3BW: before 2020SA31 3BX: before 2020SA31 3BY: before 2020SA31 3BZ: before 2020SA31 3DB: before 2020SA31 3DD: before 2020SA31 3DE: before 2020SA31 3DF: before 2020SA31 3DG: before 2020SA31 3DH: before 2020SA31 3DJ: before 2020SA31 3DL: before 2020SA31 3DN: before 2020SA31 3DP: before 2020SA31 3DQ: before 2020SA31 3DR: before 2020SA31 3DS: before 2020SA31 3DT: before 2020SA31 3DU: before 2020SA31 3DW: before 2020SA31 3DX: before 2020SA31 3DY: before 2020SA31 3DZ: before 2020SA31 3EA: before 2020SA31 3EB: before 2020SA31 3ED: before 2020SA31 3EE: before 2020SA31 3EF: before 2020SA31 3EG: before 2020SA31 3EH: before 2020SA31 3EJ: before 2020SA31 3EL: before 2020SA31 3EN: before 2020SA31 3EP: before 2020SA31 3EQ: before 2020SA31 3ER: before 2020SA31 3ES: before 2020SA31 3ET: before 2020SA31 3EU: before 2020SA31 3EW: before 2020SA31 3EX: before 2020SA31 3EY: before 2020SA31 3EZ: before 2020SA31 3FB: before 2020SA31 3GA: before 2020SA31 3GB: before 2020SA31 3GH: before 2020SA31 3GL: before 2020SA31 3GR: before 2020SA31 3GU: before 2020SA31 3HA: before 2020SA31 3HB: before 2020SA31 3HD: before 2020SA31 3HE: before 2020SA31 3HF: before 2020SA31 3HG: before 2020SA31 3HH: before 2020SA31 3HJ: before 2020SA31 3HL: before 2020SA31 3HN: before 2020SA31 3HP: before 2020SA31 3HQ: before 2020SA31 3HR: before 2020SA31 3HS: before 2020SA31 3HT: before 2020SA31 3HU: before 2020SA31 3HW: before 2020SA31 3HX: before 2020SA31 3HY: before 2020SA31 3HZ: before 2020SA31 3JA: before 2020SA31 3JB: before 2020SA31 3JD: before 2020SA31 3JE: before 2020SA31 3JF: before 2020SA31 3JG: before 2020SA31 3JH: before 2020SA31 3JJ: before 2020SA31 3JL: before 2020SA31 3JN: before 2020SA31 3JP: before 2020SA31 3JQ: before 2020SA31 3JR: before 2020SA31 3JS: before 2020SA31 3JT: before 2020SA31 3JU: before 2020SA31 3JW: before 2020SA31 3LD: before 2020SA31 3LE: before 2020SA31 3LL: before 2020SA31 3LN: before 2020SA31 3LP: before 2020SA31 3LQ: before 2020SA31 3LS: before 2020SA31 3LU: before 2020SA31 3LW: before 2020SA31 3LX: before 2020SA31 3LY: before 2020SA31 3LZ: before 2020SA31 3NA: before 2020SA31 3NB: before 2020SA31 3NE: before 2020SA31 3NF: before 2020SA31 3NG: before 2020SA31 3NJ: before 2020SA31 3NL: before 2020SA31 3NN: before 2020SA31 3NQ: before 2020SA31 3NR: before 2020SA31 3NS: before 2020SA31 3NU: before 2020SA31 3NW: before 2020SA31 3NX: before 2020SA31 3NY: before 2020SA31 3NZ: before 2020SA31 3PA: before 2020SA31 3PB: before 2020SA31 3PD: before 2020SA31 3PE: before 2020SA31 3PG: before 2020SA31 3PH: before 2020SA31 3PJ: before 2020SA31 3PL: before 2020SA31 3PN: before 2020SA31 3PP: before 2020SA31 3PQ: before 2020SA31 3PR: before 2020SA31 3PS: before 2020SA31 3PT: before 2020SA31 3PU: before 2020SA31 3PW: before 2020SA31 3PX: before 2020SA31 3PY: before 2020SA31 3PZ: before 2020SA31 3QA: before 2020SA31 3QE: before 2020SA31 3QF: before 2020SA31 3QG: before 2020SA31 3QL: before 2020SA31 3QN: before 2020SA31 3QP: before 2020SA31 3QQ: before 2020SA31 3QR: before 2020SA31 3QS: before 2020SA31 3QT: before 2020SA31 3QW: before 2020SA31 3QX: before 2020SA31 3QY: before 2020SA31 3QZ: before 2020SA31 3RB: before 2020SA31 3RD: before 2020SA31 3RG: before 2020SA31 3RJ: before 2020SA31 3RL: before 2020SA31 3RN: before 2020SA31 3RP: before 2020SA31 3RS: before 2020SA31 3RU: before 2020SA31 3RY: before 2020SA31 3SA: before 2020SA31 3SB: before 2020SA31 3SD: before 2020SA31 3SE: before 2020SA31 3SG: before 2020SA31 3DA: new since 2020SA31 3FA: new since 2020SA31 3FD: new since 2020SA31 3FF: new since 2020SA31 3FG: new since 2020SA31 3FJ: new since 2020SA31 3FN: new since 2020SA31 3QD: new since 2020 Carmarthen Map of every postcode in the SA31 3 sector, by new since 2020 Of the 203 postcodes in the SA31 3 sector that ONS places, 8 are new since 2020 and 195 were in use before 2020. 2 postcodes lie beyond the edge and are listed under the map. Places named: Carmarthen. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Carmarthen
  • New since 2020: 8
  • In use before 2020: 195

Of the 203 postcodes in the SA31 3 sector that ONS places, 8 are new since 2020 and 195 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.

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

SA31 3FNMay 2026SA31 3FJJanuary 2025SA31 3FGJune 2024SA31 3QDOctober 2022SA31 3DANovember 2020

2 further out, not drawn

These postcodes lie well apart from the rest, so the map is drawn without them to show the rest closer; they are in every count.

SA31 3QUSA31 3RR

What do homes sell for in SA31 3?

Homes in SA31 3 sold for a typical £230,000 in the 12 months to August 2026, across 82 sales, down 3.7% on the 12 months before, HM Land Registry's figures show.

£230,000 typical price, the 12 months to August 2026
£238,748 12 months to August 2025
▼ down 3.7% on the 12 months before
  • Detached £265,000 31 sales
  • Semi-detached £225,000 25 sales
  • Terraced £158,000 25 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 SA31 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 SA31 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.

SA31 3ABSA31 3ADSA31 3AESA31 3AFSA31 3AJSA31 3ALSA31 3ANSA31 3APSA31 3AQSA31 3ARSA31 3ASSA31 3AXSA31 3AYSA31 3AZSA31 3BASA31 3BBSA31 3BDSA31 3BESA31 3BGSA31 3BHSA31 3BJSA31 3BLSA31 3BNSA31 3BPSA31 3BQSA31 3BRSA31 3BSSA31 3BTSA31 3BUSA31 3BWSA31 3BXSA31 3BYSA31 3BZSA31 3DASA31 3DBSA31 3DDSA31 3DESA31 3DFSA31 3DGSA31 3DHSA31 3DJSA31 3DLSA31 3DNSA31 3DPSA31 3DQSA31 3DRSA31 3DSSA31 3DTSA31 3DUSA31 3DWSA31 3DXSA31 3DYSA31 3DZSA31 3EASA31 3EBSA31 3EDSA31 3EESA31 3EFSA31 3EGSA31 3EHSA31 3EJSA31 3ELSA31 3ENSA31 3EPSA31 3EQSA31 3ERSA31 3ESSA31 3ETSA31 3EUSA31 3EWSA31 3EXSA31 3EYSA31 3EZSA31 3FASA31 3FBSA31 3FDSA31 3FFSA31 3FGSA31 3FJSA31 3FNSA31 3GASA31 3GBSA31 3GHSA31 3GLSA31 3GRSA31 3GUSA31 3HASA31 3HBSA31 3HDSA31 3HESA31 3HFSA31 3HGSA31 3HHSA31 3HJSA31 3HLSA31 3HNSA31 3HPSA31 3HQSA31 3HRSA31 3HSSA31 3HTSA31 3HUSA31 3HWSA31 3HXSA31 3HYSA31 3HZSA31 3JASA31 3JBSA31 3JDSA31 3JESA31 3JFSA31 3JGSA31 3JHSA31 3JJSA31 3JLSA31 3JNSA31 3JPSA31 3JQSA31 3JRSA31 3JSSA31 3JTSA31 3JUSA31 3JWSA31 3LDSA31 3LESA31 3LLSA31 3LNSA31 3LPSA31 3LQSA31 3LSSA31 3LUSA31 3LWSA31 3LXSA31 3LYSA31 3LZSA31 3NASA31 3NBSA31 3NESA31 3NFSA31 3NGSA31 3NJSA31 3NLSA31 3NNSA31 3NQSA31 3NRSA31 3NSSA31 3NUSA31 3NWSA31 3NXSA31 3NYSA31 3NZSA31 3PASA31 3PBSA31 3PDSA31 3PESA31 3PGSA31 3PHSA31 3PJSA31 3PLSA31 3PNSA31 3PPSA31 3PQSA31 3PRSA31 3PSSA31 3PTSA31 3PUSA31 3PWSA31 3PXSA31 3PYSA31 3PZSA31 3QASA31 3QDSA31 3QESA31 3QFSA31 3QGSA31 3QLSA31 3QNSA31 3QPSA31 3QQSA31 3QRSA31 3QSSA31 3QTSA31 3QUSA31 3QWSA31 3QXSA31 3QYSA31 3QZSA31 3RBSA31 3RDSA31 3RGSA31 3RJSA31 3RLSA31 3RNSA31 3RPSA31 3RRSA31 3RSSA31 3RUSA31 3RYSA31 3SASA31 3SBSA31 3SDSA31 3SESA31 3SG

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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