SG18 8 postcode sector in the SG18 district

SG18 8 is a sector of the SG18 district: every postcode that starts SG18 8. It has 312 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 8 sector, by flood risk

Map of every postcode in the SG18 8 sector, by flood risk Of the 312 postcodes in the SG18 8 sector that ONS places, 9 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 299 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 9 postcodes at high or medium risk. Places named: Biggleswade. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. SG18 8AA: not on the flood risk listSG18 8AE: not on the flood risk listSG18 8AF: not on the flood risk listSG18 8AG: not on the flood risk listSG18 8AH: not on the flood risk listSG18 8AJ: not on the flood risk listSG18 8AL: not on the flood risk listSG18 8AN: not on the flood risk listSG18 8AP: not on the flood risk listSG18 8AQ: not on the flood risk listSG18 8AS: not on the flood risk listSG18 8AT: not on the flood risk listSG18 8AW: not on the flood risk listSG18 8AX: not on the flood risk listSG18 8AY: not on the flood risk listSG18 8BA: not on the flood risk listSG18 8BB: not on the flood risk listSG18 8BE: not on the flood risk listSG18 8BF: not on the flood risk listSG18 8BG: not on the flood risk listSG18 8BH: not on the flood risk listSG18 8BJ: not on the flood risk listSG18 8BL: not on the flood risk listSG18 8BP: not on the flood risk listSG18 8BQ: not on the flood risk listSG18 8BT: not on the flood risk listSG18 8BU: not on the flood risk listSG18 8BW: not on the flood risk listSG18 8BX: not on the flood risk listSG18 8BY: not on the flood risk listSG18 8BZ: not on the flood risk listSG18 8DA: not on the flood risk listSG18 8DB: not on the flood risk listSG18 8DD: not on the flood risk listSG18 8DE: not on the flood risk listSG18 8DF: not on the flood risk listSG18 8DG: not on the flood risk listSG18 8DH: not on the flood risk listSG18 8DJ: not on the flood risk listSG18 8DL: not on the flood risk listSG18 8DN: not on the flood risk listSG18 8DP: not on the flood risk listSG18 8DR: not on the flood risk listSG18 8DS: not on the flood risk listSG18 8DT: not on the flood risk listSG18 8DW: not on the flood risk listSG18 8DY: not on the flood risk listSG18 8EB: not on the flood risk listSG18 8ED: not on the flood risk listSG18 8EE: not on the flood risk listSG18 8EF: not on the flood risk listSG18 8EH: not on the flood risk listSG18 8EJ: not on the flood risk listSG18 8EL: not on the flood risk listSG18 8EN: not on the flood risk listSG18 8ES: not on the flood risk listSG18 8ET: not on the flood risk listSG18 8EW: not on the flood risk listSG18 8EY: not on the flood risk listSG18 8FA: not on the flood risk listSG18 8FB: not on the flood risk listSG18 8FD: not on the flood risk listSG18 8FE: not on the flood risk listSG18 8FF: not on the flood risk listSG18 8FG: not on the flood risk listSG18 8FH: not on the flood risk listSG18 8FJ: not on the flood risk listSG18 8FL: not on the flood risk listSG18 8FN: not on the flood risk listSG18 8FP: not on the flood risk listSG18 8FR: not on the flood risk listSG18 8FT: not on the flood risk listSG18 8FU: not on the flood risk listSG18 8FX: not on the flood risk listSG18 8FY: not on the flood risk listSG18 8FZ: not on the flood risk listSG18 8GA: not on the flood risk listSG18 8GB: not on the flood risk listSG18 8GD: not on the flood risk listSG18 8GE: not on the flood risk listSG18 8GF: not on the flood risk listSG18 8GG: not on the flood risk listSG18 8GH: not on the flood risk listSG18 8GL: not on the flood risk listSG18 8GN: not on the flood risk listSG18 8GP: not on the flood risk listSG18 8GR: not on the flood risk listSG18 8GS: not on the flood risk listSG18 8GT: not on the flood risk listSG18 8GU: not on the flood risk listSG18 8GW: not on the flood risk listSG18 8GX: not on the flood risk listSG18 8GY: not on the flood risk listSG18 8GZ: not on the flood risk listSG18 8HA: not on the flood risk listSG18 8HD: not on the flood risk listSG18 8HJ: not on the flood risk listSG18 8HL: not on the flood risk listSG18 8HN: not on the flood risk listSG18 8HP: not on the flood risk listSG18 8HR: not on the flood risk listSG18 8HT: not on the flood risk listSG18 8HU: not on the flood risk listSG18 8HW: not on the flood risk listSG18 8HX: not on the flood risk listSG18 8HY: not on the flood risk listSG18 8HZ: not on the flood risk listSG18 8JA: not on the flood risk listSG18 8JB: not on the flood risk listSG18 8JD: not on the flood risk listSG18 8JE: not on the flood risk listSG18 8JF: not on the flood risk listSG18 8JG: not on the flood risk listSG18 8JH: not on the flood risk listSG18 8JJ: not on the flood risk listSG18 8JL: not on the flood risk listSG18 8JN: not on the flood risk listSG18 8JP: not on the flood risk listSG18 8JQ: not on the flood risk listSG18 8JR: not on the flood risk listSG18 8JS: not on the flood risk listSG18 8JT: not on the flood risk listSG18 8JU: not on the flood risk listSG18 8JW: not on the flood risk listSG18 8JX: not on the flood risk listSG18 8JY: not on the flood risk listSG18 8JZ: not on the flood risk listSG18 8LA: not on the flood risk listSG18 8LD: not on the flood risk listSG18 8LE: not on the flood risk listSG18 8LF: not on the flood risk listSG18 8LH: not on the flood risk listSG18 8LJ: not on the flood risk listSG18 8LL: not on the flood risk listSG18 8LN: not on the flood risk listSG18 8LP: not on the flood risk listSG18 8LQ: not on the flood risk listSG18 8LR: not on the flood risk listSG18 8LS: not on the flood risk listSG18 8LT: not on the flood risk listSG18 8LU: not on the flood risk listSG18 8LW: not on the flood risk listSG18 8LX: not on the flood risk listSG18 8LY: not on the flood risk listSG18 8LZ: not on the flood risk listSG18 8ND: not on the flood risk listSG18 8NE: not on the flood risk listSG18 8NF: not on the flood risk listSG18 8NG: not on the flood risk listSG18 8NH: not on the flood risk listSG18 8NL: not on the flood risk listSG18 8NN: not on the flood risk listSG18 8NP: not on the flood risk listSG18 8NQ: not on the flood risk listSG18 8NR: not on the flood risk listSG18 8NS: not on the flood risk listSG18 8NT: not on the flood risk listSG18 8NU: not on the flood risk listSG18 8NW: not on the flood risk listSG18 8NX: not on the flood risk listSG18 8NY: not on the flood risk listSG18 8NZ: not on the flood risk listSG18 8PA: not on the flood risk listSG18 8PB: not on the flood risk listSG18 8PD: not on the flood risk listSG18 8PE: not on the flood risk listSG18 8PF: not on the flood risk listSG18 8PG: not on the flood risk listSG18 8PH: not on the flood risk listSG18 8PJ: not on the flood risk listSG18 8PP: not on the flood risk listSG18 8PQ: not on the flood risk listSG18 8PW: not on the flood risk listSG18 8PZ: not on the flood risk listSG18 8QA: not on the flood risk listSG18 8QB: not on the flood risk listSG18 8QD: not on the flood risk listSG18 8QE: not on the flood risk listSG18 8QF: not on the flood risk listSG18 8QG: not on the flood risk listSG18 8QH: not on the flood risk listSG18 8QJ: not on the flood risk listSG18 8QL: not on the flood risk listSG18 8QN: not on the flood risk listSG18 8QQ: not on the flood risk listSG18 8QS: not on the flood risk listSG18 8QT: not on the flood risk listSG18 8QU: not on the flood risk listSG18 8QX: not on the flood risk listSG18 8QY: not on the flood risk listSG18 8RA: not on the flood risk listSG18 8RB: not on the flood risk listSG18 8RD: not on the flood risk listSG18 8RE: not on the flood risk listSG18 8RF: not on the flood risk listSG18 8RG: not on the flood risk listSG18 8RH: not on the flood risk listSG18 8RJ: not on the flood risk listSG18 8RL: not on the flood risk listSG18 8RN: not on the flood risk listSG18 8RP: not on the flood risk listSG18 8RQ: not on the flood risk listSG18 8RR: not on the flood risk listSG18 8RS: not on the flood risk listSG18 8RT: not on the flood risk listSG18 8RU: not on the flood risk listSG18 8RW: not on the flood risk listSG18 8RX: not on the flood risk listSG18 8RY: not on the flood risk listSG18 8RZ: not on the flood risk listSG18 8SA: not on the flood risk listSG18 8SB: not on the flood risk listSG18 8SD: not on the flood risk listSG18 8SF: not on the flood risk listSG18 8SG: not on the flood risk listSG18 8SH: not on the flood risk listSG18 8SJ: not on the flood risk listSG18 8SL: not on the flood risk listSG18 8SN: not on the flood risk listSG18 8SP: not on the flood risk listSG18 8SQ: not on the flood risk listSG18 8SR: not on the flood risk listSG18 8SS: not on the flood risk listSG18 8ST: not on the flood risk listSG18 8SU: not on the flood risk listSG18 8SW: not on the flood risk listSG18 8SX: not on the flood risk listSG18 8SY: not on the flood risk listSG18 8TP: not on the flood risk listSG18 8TQ: not on the flood risk listSG18 8TR: not on the flood risk listSG18 8TS: not on the flood risk listSG18 8TT: not on the flood risk listSG18 8TU: not on the flood risk listSG18 8TW: not on the flood risk listSG18 8TX: not on the flood risk listSG18 8TY: not on the flood risk listSG18 8TZ: not on the flood risk listSG18 8UA: not on the flood risk listSG18 8UB: not on the flood risk listSG18 8UD: not on the flood risk listSG18 8UE: not on the flood risk listSG18 8UF: not on the flood risk listSG18 8UG: not on the flood risk listSG18 8UH: not on the flood risk listSG18 8UJ: not on the flood risk listSG18 8UL: not on the flood risk listSG18 8UN: not on the flood risk listSG18 8UP: not on the flood risk listSG18 8UQ: not on the flood risk listSG18 8UR: not on the flood risk listSG18 8US: not on the flood risk listSG18 8UT: not on the flood risk listSG18 8UW: not on the flood risk listSG18 8UX: not on the flood risk listSG18 8UY: not on the flood risk listSG18 8UZ: not on the flood risk listSG18 8WA: not on the flood risk listSG18 8WB: not on the flood risk listSG18 8WD: not on the flood risk listSG18 8WH: not on the flood risk listSG18 8WJ: not on the flood risk listSG18 8WL: not on the flood risk listSG18 8WP: not on the flood risk listSG18 8XD: not on the flood risk listSG18 8XL: not on the flood risk listSG18 8XP: not on the flood risk listSG18 8XQ: not on the flood risk listSG18 8XR: not on the flood risk listSG18 8XS: not on the flood risk listSG18 8XT: not on the flood risk listSG18 8XY: not on the flood risk listSG18 8YD: not on the flood risk listSG18 8YF: not on the flood risk listSG18 8YG: not on the flood risk listSG18 8YJ: not on the flood risk listSG18 8YL: not on the flood risk listSG18 8YN: not on the flood risk listSG18 8YP: not on the flood risk listSG18 8YS: not on the flood risk listSG18 8YT: not on the flood risk listSG18 8YU: not on the flood risk listSG18 8YW: not on the flood risk listSG18 8YY: not on the flood risk listSG18 8YZ: not on the flood risk listSG18 8ZA: not on the flood risk listSG18 8HH: low flood risk at worstSG18 8YQ: low flood risk at worstSG18 8YR: low flood risk at worstSG18 8BN: medium flood risk at worstSG18 8AZ: high flood riskSG18 8DU: high flood riskSG18 8DX: high flood riskSG18 8DZ: high flood riskSG18 8EA: high flood riskSG18 8HE: high flood riskSG18 8HF: high flood riskSG18 8HG: high flood riskSG18 8HQ: high flood risk Biggleswade 9 postcodes at high or medium risk, outlined: this goes to SG18 8HQ, the one with most homes and businesses at high risk9 postcodes at high or medium risk Map of every postcode in the SG18 8 sector, by flood risk Of the 312 postcodes in the SG18 8 sector that ONS places, 9 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 299 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 9 postcodes at high or medium risk. Places named: Biggleswade. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. Biggleswade
  • A home or business at high risk: 9
  • At medium risk at worst: 1
  • At low risk at worst: 3
  • At very low risk only: 0
  • Not on the at-risk list: 299
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 312 postcodes in the SG18 8 sector that ONS places, 9 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 299 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 150 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 8HQ17 at high riskSG18 8HG16 at high riskSG18 8EA13 at high riskSG18 8DZ8 at high riskSG18 8HE7 at high riskSG18 8DX5 at high riskSG18 8DU3 at high riskSG18 8AZ2 at high riskSG18 8HF1 at high risk

Where the postcodes at high or medium risk lie together

  • 9 postcodes at high or medium risk, outlined on the map. SG18 8HQ, is the one with most homes and businesses at high risk.

What do homes sell for in SG18 8?

Homes in SG18 8 sold for a typical £352,500 in the 12 months to August 2026, across 189 sales, up 0.7% on the 12 months before, HM Land Registry's figures show.

£352,500 typical price, the 12 months to August 2026
£350,000 12 months to August 2025
▲ up 0.7% on the 12 months before
  • Detached £465,000 41 sales
  • Semi-detached £378,000 61 sales
  • Terraced £310,000 57 sales
  • Flat or maisonette £228,250 30 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 8. 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 8

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 8AASG18 8AESG18 8AFSG18 8AGSG18 8AHSG18 8AJSG18 8ALSG18 8ANSG18 8APSG18 8AQSG18 8ARSG18 8ASSG18 8ATSG18 8AWSG18 8AXSG18 8AYSG18 8AZSG18 8BASG18 8BBSG18 8BESG18 8BFSG18 8BGSG18 8BHSG18 8BJSG18 8BLSG18 8BNSG18 8BPSG18 8BQSG18 8BTSG18 8BUSG18 8BWSG18 8BXSG18 8BYSG18 8BZSG18 8DASG18 8DBSG18 8DDSG18 8DESG18 8DFSG18 8DGSG18 8DHSG18 8DJSG18 8DLSG18 8DNSG18 8DPSG18 8DRSG18 8DSSG18 8DTSG18 8DUSG18 8DWSG18 8DXSG18 8DYSG18 8DZSG18 8EASG18 8EBSG18 8EDSG18 8EESG18 8EFSG18 8EHSG18 8EJSG18 8ELSG18 8ENSG18 8ESSG18 8ETSG18 8EWSG18 8EYSG18 8EZSG18 8FASG18 8FBSG18 8FDSG18 8FESG18 8FFSG18 8FGSG18 8FHSG18 8FJSG18 8FLSG18 8FNSG18 8FPSG18 8FQSG18 8FRSG18 8FSSG18 8FTSG18 8FUSG18 8FWSG18 8FXSG18 8FYSG18 8FZSG18 8GASG18 8GBSG18 8GDSG18 8GESG18 8GFSG18 8GGSG18 8GHSG18 8GJSG18 8GLSG18 8GNSG18 8GPSG18 8GQSG18 8GRSG18 8GSSG18 8GTSG18 8GUSG18 8GWSG18 8GXSG18 8GYSG18 8GZSG18 8HASG18 8HDSG18 8HESG18 8HFSG18 8HGSG18 8HHSG18 8HJSG18 8HLSG18 8HNSG18 8HPSG18 8HQSG18 8HRSG18 8HSSG18 8HTSG18 8HUSG18 8HWSG18 8HXSG18 8HYSG18 8HZSG18 8JASG18 8JBSG18 8JDSG18 8JESG18 8JFSG18 8JGSG18 8JHSG18 8JJSG18 8JLSG18 8JNSG18 8JPSG18 8JQSG18 8JRSG18 8JSSG18 8JTSG18 8JUSG18 8JWSG18 8JXSG18 8JYSG18 8JZSG18 8LASG18 8LDSG18 8LESG18 8LFSG18 8LGSG18 8LHSG18 8LJSG18 8LLSG18 8LNSG18 8LPSG18 8LQSG18 8LRSG18 8LSSG18 8LTSG18 8LUSG18 8LWSG18 8LXSG18 8LYSG18 8LZSG18 8NDSG18 8NESG18 8NFSG18 8NGSG18 8NHSG18 8NLSG18 8NNSG18 8NPSG18 8NQSG18 8NRSG18 8NSSG18 8NTSG18 8NUSG18 8NWSG18 8NXSG18 8NYSG18 8NZSG18 8PASG18 8PBSG18 8PDSG18 8PESG18 8PFSG18 8PGSG18 8PHSG18 8PJSG18 8PPSG18 8PQSG18 8PSSG18 8PWSG18 8PZSG18 8QASG18 8QBSG18 8QDSG18 8QESG18 8QFSG18 8QGSG18 8QHSG18 8QJSG18 8QLSG18 8QNSG18 8QQSG18 8QSSG18 8QTSG18 8QUSG18 8QXSG18 8QYSG18 8RASG18 8RBSG18 8RDSG18 8RESG18 8RFSG18 8RGSG18 8RHSG18 8RJSG18 8RLSG18 8RNSG18 8RPSG18 8RQSG18 8RRSG18 8RSSG18 8RTSG18 8RUSG18 8RWSG18 8RXSG18 8RYSG18 8RZSG18 8SASG18 8SBSG18 8SDSG18 8SFSG18 8SGSG18 8SHSG18 8SJSG18 8SLSG18 8SNSG18 8SPSG18 8SQSG18 8SRSG18 8SSSG18 8STSG18 8SUSG18 8SWSG18 8SXSG18 8SYSG18 8SZSG18 8TPSG18 8TQSG18 8TRSG18 8TSSG18 8TTSG18 8TUSG18 8TWSG18 8TXSG18 8TYSG18 8TZSG18 8UASG18 8UBSG18 8UDSG18 8UESG18 8UFSG18 8UGSG18 8UHSG18 8UJSG18 8ULSG18 8UNSG18 8UPSG18 8UQSG18 8URSG18 8USSG18 8UTSG18 8UUSG18 8UWSG18 8UXSG18 8UYSG18 8UZSG18 8WASG18 8WBSG18 8WDSG18 8WHSG18 8WJSG18 8WLSG18 8WPSG18 8XDSG18 8XLSG18 8XPSG18 8XQSG18 8XRSG18 8XSSG18 8XTSG18 8XYSG18 8YDSG18 8YFSG18 8YGSG18 8YHSG18 8YJSG18 8YLSG18 8YNSG18 8YPSG18 8YQSG18 8YRSG18 8YSSG18 8YTSG18 8YUSG18 8YWSG18 8YYSG18 8YZSG18 8ZA

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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