SG18 9 postcode sector in the SG18 district

SG18 9 is a sector of the SG18 district: every postcode that starts SG18 9. It has 251 postcodes in use, 5 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 SG18 9 sector, by flood risk

Map of every postcode in the SG18 9 sector, by flood risk Of the 251 postcodes in the SG18 9 sector that ONS places, 12 have a home or business at high risk, 10 are at medium risk at worst, 11 are at low risk at worst, 3 are at very low risk only and 215 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 7 postcodes at high or medium risk. Places named: Biggleswade, Langford. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. A600 SG18 9AA: not on the flood risk listSG18 9AD: not on the flood risk listSG18 9AE: not on the flood risk listSG18 9AG: not on the flood risk listSG18 9AH: not on the flood risk listSG18 9AJ: not on the flood risk listSG18 9AL: not on the flood risk listSG18 9AN: not on the flood risk listSG18 9AP: not on the flood risk listSG18 9AT: not on the flood risk listSG18 9AU: not on the flood risk listSG18 9AW: not on the flood risk listSG18 9AX: not on the flood risk listSG18 9BA: not on the flood risk listSG18 9BD: not on the flood risk listSG18 9BG: not on the flood risk listSG18 9BH: not on the flood risk listSG18 9BL: not on the flood risk listSG18 9BN: not on the flood risk listSG18 9BP: not on the flood risk listSG18 9BQ: not on the flood risk listSG18 9BT: not on the flood risk listSG18 9BU: not on the flood risk listSG18 9BX: not on the flood risk listSG18 9BZ: not on the flood risk listSG18 9DA: not on the flood risk listSG18 9DB: not on the flood risk listSG18 9DD: not on the flood risk listSG18 9DE: not on the flood risk listSG18 9DF: not on the flood risk listSG18 9DH: not on the flood risk listSG18 9DJ: not on the flood risk listSG18 9DL: not on the flood risk listSG18 9DN: not on the flood risk listSG18 9DP: not on the flood risk listSG18 9DQ: not on the flood risk listSG18 9DR: not on the flood risk listSG18 9DS: not on the flood risk listSG18 9DT: not on the flood risk listSG18 9DX: not on the flood risk listSG18 9DZ: not on the flood risk listSG18 9EA: not on the flood risk listSG18 9EB: not on the flood risk listSG18 9EE: not on the flood risk listSG18 9EF: not on the flood risk listSG18 9EG: not on the flood risk listSG18 9EJ: not on the flood risk listSG18 9EL: not on the flood risk listSG18 9EN: not on the flood risk listSG18 9EP: not on the flood risk listSG18 9ER: not on the flood risk listSG18 9ES: not on the flood risk listSG18 9ET: not on the flood risk listSG18 9EU: not on the flood risk listSG18 9EW: not on the flood risk listSG18 9EY: not on the flood risk listSG18 9EZ: not on the flood risk listSG18 9FA: not on the flood risk listSG18 9FD: not on the flood risk listSG18 9FE: not on the flood risk listSG18 9FF: not on the flood risk listSG18 9FG: not on the flood risk listSG18 9FH: not on the flood risk listSG18 9FJ: not on the flood risk listSG18 9FL: not on the flood risk listSG18 9FN: not on the flood risk listSG18 9FP: not on the flood risk listSG18 9FQ: not on the flood risk listSG18 9FR: not on the flood risk listSG18 9FS: not on the flood risk listSG18 9FT: not on the flood risk listSG18 9FU: not on the flood risk listSG18 9FW: not on the flood risk listSG18 9FX: not on the flood risk listSG18 9FY: not on the flood risk listSG18 9FZ: not on the flood risk listSG18 9GD: not on the flood risk listSG18 9GE: not on the flood risk listSG18 9GF: not on the flood risk listSG18 9GJ: not on the flood risk listSG18 9GP: not on the flood risk listSG18 9GR: not on the flood risk listSG18 9GS: not on the flood risk listSG18 9GT: not on the flood risk listSG18 9GU: not on the flood risk listSG18 9GW: not on the flood risk listSG18 9GX: not on the flood risk listSG18 9GZ: not on the flood risk listSG18 9HA: not on the flood risk listSG18 9HB: not on the flood risk listSG18 9HD: not on the flood risk listSG18 9HF: not on the flood risk listSG18 9HG: not on the flood risk listSG18 9HH: not on the flood risk listSG18 9HJ: not on the flood risk listSG18 9HL: not on the flood risk listSG18 9HQ: not on the flood risk listSG18 9HT: not on the flood risk listSG18 9HU: not on the flood risk listSG18 9HX: not on the flood risk listSG18 9JA: not on the flood risk listSG18 9JB: not on the flood risk listSG18 9JD: not on the flood risk listSG18 9JE: not on the flood risk listSG18 9JF: not on the flood risk listSG18 9JG: not on the flood risk listSG18 9JJ: not on the flood risk listSG18 9JL: not on the flood risk listSG18 9JN: not on the flood risk listSG18 9JQ: not on the flood risk listSG18 9JS: not on the flood risk listSG18 9LA: not on the flood risk listSG18 9LB: not on the flood risk listSG18 9LD: not on the flood risk listSG18 9LH: not on the flood risk listSG18 9LJ: not on the flood risk listSG18 9LL: not on the flood risk listSG18 9LN: not on the flood risk listSG18 9LP: not on the flood risk listSG18 9LR: not on the flood risk listSG18 9LS: not on the flood risk listSG18 9LT: not on the flood risk listSG18 9LU: not on the flood risk listSG18 9LW: not on the flood risk listSG18 9LX: not on the flood risk listSG18 9NA: not on the flood risk listSG18 9NB: not on the flood risk listSG18 9ND: not on the flood risk listSG18 9NG: not on the flood risk listSG18 9NH: not on the flood risk listSG18 9NJ: not on the flood risk listSG18 9NL: not on the flood risk listSG18 9NN: not on the flood risk listSG18 9NR: not on the flood risk listSG18 9NS: not on the flood risk listSG18 9NU: not on the flood risk listSG18 9NW: not on the flood risk listSG18 9NY: not on the flood risk listSG18 9NZ: not on the flood risk listSG18 9PA: not on the flood risk listSG18 9PB: not on the flood risk listSG18 9PD: not on the flood risk listSG18 9PE: not on the flood risk listSG18 9PF: not on the flood risk listSG18 9PH: not on the flood risk listSG18 9PJ: not on the flood risk listSG18 9PL: not on the flood risk listSG18 9PP: not on the flood risk listSG18 9PQ: not on the flood risk listSG18 9PR: not on the flood risk listSG18 9PS: not on the flood risk listSG18 9PU: not on the flood risk listSG18 9PY: not on the flood risk listSG18 9QD: not on the flood risk listSG18 9QE: not on the flood risk listSG18 9QF: not on the flood risk listSG18 9QG: not on the flood risk listSG18 9QH: not on the flood risk listSG18 9QJ: not on the flood risk listSG18 9QL: not on the flood risk listSG18 9QN: not on the flood risk listSG18 9QP: not on the flood risk listSG18 9QQ: not on the flood risk listSG18 9QS: not on the flood risk listSG18 9QT: not on the flood risk listSG18 9QU: not on the flood risk listSG18 9QW: not on the flood risk listSG18 9RB: not on the flood risk listSG18 9RD: not on the flood risk listSG18 9RF: not on the flood risk listSG18 9RN: not on the flood risk listSG18 9RP: not on the flood risk listSG18 9RS: not on the flood risk listSG18 9RT: not on the flood risk listSG18 9SF: not on the flood risk listSG18 9SG: not on the flood risk listSG18 9SJ: not on the flood risk listSG18 9SN: not on the flood risk listSG18 9SR: not on the flood risk listSG18 9SS: not on the flood risk listSG18 9ST: not on the flood risk listSG18 9SX: not on the flood risk listSG18 9SY: not on the flood risk listSG18 9SZ: not on the flood risk listSG18 9TA: not on the flood risk listSG18 9TB: not on the flood risk listSG18 9TD: not on the flood risk listSG18 9TH: not on the flood risk listSG18 9TJ: not on the flood risk listSG18 9UD: not on the flood risk listSG18 9UT: not on the flood risk listSG18 9QX: very low flood risk onlySG18 9RA: very low flood risk onlySG18 9AQ: low flood risk at worstSG18 9BJ: low flood risk at worstSG18 9BS: low flood risk at worstSG18 9EH: low flood risk at worstSG18 9FB: low flood risk at worstSG18 9GQ: low flood risk at worstSG18 9QB: low flood risk at worstSG18 9NX: low flood risk at worstSG18 9QY: low flood risk at worstSG18 9RE: low flood risk at worstSG18 9UR: low flood risk at worstSG18 9AY: medium flood risk at worstSG18 9BE: medium flood risk at worstSG18 9GG: medium flood risk at worstSG18 9GH: medium flood risk at worstSG18 9JU: medium flood risk at worstSG18 9RL: medium flood risk at worstSG18 9RU: medium flood risk at worstSG18 9RW: medium flood risk at worstSG18 9SE: medium flood risk at worstSG18 9AB: high flood riskSG18 9BB: high flood riskSG18 9DU: high flood riskSG18 9ED: high flood riskSG18 9JH: high flood riskSG18 9JT: high flood riskSG18 9JX: high flood riskSG18 9JZ: high flood riskSG18 9LZ: high flood riskSG18 9RZ: high flood riskSG18 9SA: high flood riskSG18 9SD: high flood risk BiggleswadeLangford 7 postcodes at high or medium risk, outlined: this goes to SG18 9SD, the one with most homes and businesses at high risk7 postcodes at high or medium risk Map of every postcode in the SG18 9 sector, by flood risk Of the 251 postcodes in the SG18 9 sector that ONS places, 12 have a home or business at high risk, 10 are at medium risk at worst, 11 are at low risk at worst, 3 are at very low risk only and 215 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 7 postcodes at high or medium risk. Places named: Biggleswade, Langford. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A600 BiggleswadeLangford
  • A home or business at high risk: 12
  • At medium risk at worst: 10
  • At low risk at worst: 11
  • At very low risk only: 3
  • Not on the at-risk list: 215
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 251 postcodes in the SG18 9 sector that ONS places, 12 have a home or business at high risk, 10 are at medium risk at worst, 11 are at low risk at worst, 3 are at very low risk only and 215 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. A dashed outline shows where 5 or more lie within 230 metres of each other. It is not a boundary, and 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.

SG18 9SD10 at high riskSG18 9JT7 at high riskSG18 9LZ6 at high riskSG18 9RZ5 at high riskSG18 9SA5 at high riskSG18 9AB3 at high riskSG18 9ED2 at high riskSG18 9JZ2 at high riskSG18 9BB1 at high riskSG18 9DU1 at high riskSG18 9JH1 at high riskSG18 9JX1 at high risk

Where the postcodes at high or medium risk lie together

  • 7 postcodes at high or medium risk, outlined on the map. SG18 9SD, is the one with most homes and businesses at high risk.

What do homes sell for in SG18 9?

Homes in SG18 9 sold for a typical £413,500 in the 12 months to August 2026, across 84 sales, down 3.8% on the 12 months before, HM Land Registry's figures show.

£413,500 typical price, the 12 months to August 2026
£430,000 12 months to August 2025
▼ down 3.8% on the 12 months before
  • Detached £493,000 27 sales
  • Semi-detached £430,000 35 sales
  • Terraced £288,750 16 sales
  • Flat or maisonette £194,000 6 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 SG18 9. 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 SG18 9

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.

SG18 9AASG18 9ABSG18 9ADSG18 9AESG18 9AFSG18 9AGSG18 9AHSG18 9AJSG18 9ALSG18 9ANSG18 9APSG18 9AQSG18 9ARSG18 9ATSG18 9AUSG18 9AWSG18 9AXSG18 9AYSG18 9BASG18 9BBSG18 9BDSG18 9BESG18 9BGSG18 9BHSG18 9BJSG18 9BLSG18 9BNSG18 9BPSG18 9BQSG18 9BSSG18 9BTSG18 9BUSG18 9BXSG18 9BZSG18 9DASG18 9DBSG18 9DDSG18 9DESG18 9DFSG18 9DGSG18 9DHSG18 9DJSG18 9DLSG18 9DNSG18 9DPSG18 9DQSG18 9DRSG18 9DSSG18 9DTSG18 9DUSG18 9DWSG18 9DXSG18 9DZSG18 9EASG18 9EBSG18 9EDSG18 9EESG18 9EFSG18 9EGSG18 9EHSG18 9EJSG18 9ELSG18 9ENSG18 9EPSG18 9ERSG18 9ESSG18 9ETSG18 9EUSG18 9EWSG18 9EYSG18 9EZSG18 9FASG18 9FBSG18 9FDSG18 9FESG18 9FFSG18 9FGSG18 9FHSG18 9FJSG18 9FLSG18 9FNSG18 9FPSG18 9FQSG18 9FRSG18 9FSSG18 9FTSG18 9FUSG18 9FWSG18 9FXSG18 9FYSG18 9FZSG18 9GASG18 9GBSG18 9GDSG18 9GESG18 9GFSG18 9GGSG18 9GHSG18 9GJSG18 9GLSG18 9GNSG18 9GPSG18 9GQSG18 9GRSG18 9GSSG18 9GTSG18 9GUSG18 9GWSG18 9GXSG18 9GZSG18 9HASG18 9HBSG18 9HDSG18 9HFSG18 9HGSG18 9HHSG18 9HJSG18 9HLSG18 9HQSG18 9HTSG18 9HUSG18 9HXSG18 9HZSG18 9JASG18 9JBSG18 9JDSG18 9JESG18 9JFSG18 9JGSG18 9JHSG18 9JJSG18 9JLSG18 9JNSG18 9JQSG18 9JSSG18 9JTSG18 9JUSG18 9JXSG18 9JYSG18 9JZSG18 9LASG18 9LBSG18 9LDSG18 9LHSG18 9LJSG18 9LLSG18 9LNSG18 9LPSG18 9LRSG18 9LSSG18 9LTSG18 9LUSG18 9LWSG18 9LXSG18 9LZSG18 9NASG18 9NBSG18 9NDSG18 9NESG18 9NGSG18 9NHSG18 9NJSG18 9NLSG18 9NNSG18 9NPSG18 9NQSG18 9NRSG18 9NSSG18 9NUSG18 9NWSG18 9NXSG18 9NYSG18 9NZSG18 9PASG18 9PBSG18 9PDSG18 9PESG18 9PFSG18 9PGSG18 9PHSG18 9PJSG18 9PLSG18 9PNSG18 9PPSG18 9PQSG18 9PRSG18 9PSSG18 9PTSG18 9PUSG18 9PWSG18 9PXSG18 9PYSG18 9QASG18 9QBSG18 9QDSG18 9QESG18 9QFSG18 9QGSG18 9QHSG18 9QJSG18 9QLSG18 9QNSG18 9QPSG18 9QQSG18 9QRSG18 9QSSG18 9QTSG18 9QUSG18 9QWSG18 9QXSG18 9QYSG18 9QZSG18 9RASG18 9RBSG18 9RDSG18 9RESG18 9RFSG18 9RLSG18 9RNSG18 9RPSG18 9RRSG18 9RSSG18 9RTSG18 9RUSG18 9RWSG18 9RYSG18 9RZSG18 9SASG18 9SDSG18 9SESG18 9SFSG18 9SGSG18 9SHSG18 9SJSG18 9SNSG18 9SQSG18 9SRSG18 9SSSG18 9STSG18 9SXSG18 9SYSG18 9SZSG18 9TASG18 9TBSG18 9TDSG18 9THSG18 9TJSG18 9UASG18 9UDSG18 9URSG18 9UT

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.